1. The high-barrier breathable medical fabric is characterized by mainly comprising the following raw material components in parts by weight: 60-90 parts of modified polypropylene melt-blown fabric and 10-25 parts of modified nano silicon dioxide;

the modified nano-silica contains aminated mesoporous silica and a copper ion metal organic framework material.

2. The method of claim 1The high-barrier breathable medical fabric is characterized in that the modified polypropylene melt-blown fabric is made of 50-80 g/m of gram weight²The polypropylene melt-blown fabric is prepared after the reaction with maleic anhydride after irradiation.

3. The high-barrier breathable medical fabric according to claim 2, wherein the aminated mesoporous silica is prepared from a polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer, tetraethoxysilane, 3-aminopropyltriethoxysilane and hydrochloric acid.

4. The high-barrier breathable medical fabric according to claim 3, wherein the copper ion metal organic framework material is prepared by using a copper sheet as an electrode and electrolyzing the copper sheet in N, N-dimethylformamide containing 2-aminoterephthalic acid, copper nitrate and 1-butyl-3-methylimidazolium chloride.

5. The high-barrier breathable medical fabric according to claim 4, wherein the high-barrier breathable medical fabric mainly comprises the following raw material components in parts by weight: 85 parts of modified polypropylene melt-blown fabric and 15 parts of modified nano silicon dioxide.

6. A preparation process of a high-barrier breathable medical fabric is characterized by mainly comprising the following preparation steps:

(1) carrying out irradiation treatment on polypropylene melt-blown fabric to obtain pretreated polypropylene melt-blown fabric, mixing and dissolving maleic anhydride and acetone, adding the pretreated polypropylene melt-blown fabric, carrying out ultrasonic treatment, heating, stirring, reacting, filtering and drying to obtain modified polypropylene melt-blown fabric;

(2) dissolving a polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer in water, adding concentrated hydrochloric acid, stirring for reaction, adding the modified polypropylene melt-blown fabric obtained in the step (1), ethyl orthosilicate and 3-aminopropyltriethoxysilane, continuously stirring for reaction, filtering, washing, extracting and drying to obtain a blank;

(3) mixing 2-aminoterephthalic acid with an organic solvent, adding copper nitrate and 1-butyl-3-methylimidazole chloride salt, adding the blank obtained in the step (2), stirring and mixing to obtain a mixed electrolyte, inserting the pretreated copper sheet serving as an electrode into the mixed electrolyte, electrolyzing under a direct-current stabilized power supply, filtering and drying to obtain a pretreated blank;

(4) and (4) hot-pressing the pretreated blank obtained in the step (3) to obtain the high-barrier breathable medical fabric.

7. The preparation process of the high-barrier breathable medical fabric according to claim 6, wherein the preparation process of the high-barrier breathable medical fabric mainly comprises the following preparation steps:

(1) the gram weight is 70g/m²Irradiating the polypropylene melt-blown fabric for 1-4 hours by using gamma rays to obtain pretreated polypropylene melt-blown fabric, wherein maleic anhydride and acetone are mixed according to a mass ratio of 1: 10-1: 15, stirring at room temperature until the mixture is dissolved, adding pretreated polypropylene melt-blown fabric with the mass of 0.2-0.4 times that of acetone into the mixture of maleic anhydride and acetone, performing ultrasonic treatment for 30-50 min at the frequency of 45-55 kHz, stirring at the temperature of 100 ℃ for reaction for 4-6 h, filtering to obtain a modified polypropylene melt-blown fabric blank, and freeze-drying the modified polypropylene melt-blown fabric blank to obtain the modified polypropylene melt-blown fabric;

(2) mixing polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer and water in a mass ratio of 1: 15-1: 25 in a beaker, stirring until the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer is dissolved, adding 38% hydrochloric acid with mass fraction of 1-2 times of the mass of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer into the beaker, stirring and reacting for 4-6 h at the temperature of 50 ℃ and the rotating speed of 150-180 r/min, and then adding 8-20 times of the mass of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer into the beaker to obtain modified polypropylene melt-spray cloth, 1-4 times of the mass of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer, and 1-4 times of the mass of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer 3-aminopropyltriethoxysilane with the mass of 0.5-2.0 times of that of the polymer is continuously stirred and reacted for 24 hours at the temperature of 40 ℃ and the rotation speed of 150-170 r/min, then the mixture is reacted for 24 hours at the constant temperature of 90 ℃ and filtered to obtain a filter cake, the filter cake is washed for 2 times by deionized water and absolute ethyl alcohol respectively, extracted by petroleum ether, extracted for 5-8 hours and then dried in vacuum to obtain a blank;

(3) mixing 2-amino terephthalic acid and N, N-dimethylformamide in a mass ratio of 1: 100-1: 150 in a reaction kettle, adding copper nitrate accounting for 0.25-0.28 times of the mass of the 2-amino terephthalic acid and 1-butyl-3-methylimidazole chloride accounting for 3-4 times of the mass of the 2-amino terephthalic acid into the reaction kettle, simultaneously adding the blank obtained in the step (2) accounting for 10-40 times of the mass of the 2-amino terephthalic acid, stirring and mixing to obtain a mixed electrolyte, inserting a pretreated copper sheet serving as an electrode into the mixed electrolyte, electrolyzing under a direct-current stabilized power supply, filtering and drying to obtain a pretreated blank;

(4) and (4) carrying out hot pressing on the pretreated blank obtained in the step (3) for 10min under the conditions that the pressure is 2-4 MPa and the temperature is 130-150 ℃, and then obtaining the high-barrier breathable medical fabric.

8. The preparation process of the high-barrier breathable medical fabric according to claim 7, wherein the irradiation dose of the gamma ray irradiation treatment in the step (1) is 15-55 kGy.

9. The preparation process of the high-barrier breathable medical fabric according to claim 7, wherein the preparation process of the pretreated copper sheet in the step (3) is that the copper sheet with the purity of 99.99% and the thickness of 0.5mm is cut into a shape of 1cm x 8cm, the cut copper sheet is polished by 600-mesh abrasive paper until the surface is smooth and flat to obtain a pretreated copper sheet blank, the pretreated copper sheet blank is firstly put into acetone solution to be soaked for 15min under the condition that the ultrasonic frequency is 40kHz, and then is soaked for 3min in 10% dilute nitric acid at room temperature, and then the pretreated copper sheet blank is taken out, washed and dried to obtain the pretreated copper sheet.

10. The preparation process of the high-barrier breathable medical fabric according to claim 6,characterized in that the electrolysis condition in the step (3) is that the current density is 0.025A-cm^-2And the electrolysis time is 2 hours.

Background

Hospitals are the main places for performing operations, examinations, treatments and rescues on patients, and the cleanliness of the hospital environment, particularly the cleanliness and the performance of medical fabrics, directly influence the wound healing and health of patients and are also important factors causing hospital infection and cross infection. The prior medical fabric, namely cotton, is based on the following defects: 1. the paint is not waterproof, is not anti-fouling and is easy to cross-infect; 2. the air permeability is poor, the coloring performance is poor, and the comfort is insufficient; 3. sanding is needed, scraps can be greatly dropped in the using process, and unclean and infection are easily caused; 4. the fabric is easy to wrinkle, the mobility of the laundry detergent and the disinfectant in the wet fabric is poor, the disinfection is not uniform, the laundry detergent and the disinfectant are not clean to wash, knotting is easy to occur, and the laundry detergent and the disinfectant are not easy to dry.

The medical fabric made of the polymer has air permeability, and the barrier rate is often unsatisfactory, so that research and development of the polymer medical fabric which is air permeable and has high barrier rate are needed.

Disclosure of Invention

The invention aims to provide a high-barrier breathable medical fabric and a preparation process thereof, and aims to solve the problems in the prior art.

The high-barrier breathable medical fabric is characterized by mainly comprising the following raw material components in parts by weight: 60-90 parts of modified polypropylene melt-blown fabric and 10-25 parts of modified nano silicon dioxide;

the modified nano-silica contains aminated mesoporous silica and a copper ion metal organic framework material.

Preferably, the modified polypropylene melt-blown fabric is prepared by irradiating the polypropylene melt-blown fabric and then reacting the irradiated polypropylene melt-blown fabric with maleic anhydride.

Preferably, the aminated mesoporous silica is prepared from a polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer, tetraethoxysilane, 3-aminopropyltriethoxysilane and hydrochloric acid.

Preferably, the copper ion metal organic framework material is prepared by using a copper sheet as an electrode and electrolyzing the copper sheet in N, N-dimethylformamide containing 2-amino terephthalic acid, copper nitrate and 1-butyl-3-methylimidazolium chloride.

As optimization, the high-barrier breathable medical fabric mainly comprises the following raw material components in parts by weight: 85 parts of modified polypropylene melt-blown fabric and 15 parts of modified nano silicon dioxide.

As optimization, the preparation process of the high-barrier breathable medical fabric mainly comprises the following preparation steps:

(1) carrying out irradiation treatment on polypropylene melt-blown fabric to obtain pretreated polypropylene melt-blown fabric, mixing and dissolving maleic anhydride and acetone, adding the pretreated polypropylene melt-blown fabric, carrying out ultrasonic treatment, heating, stirring, reacting, filtering and drying to obtain modified polypropylene melt-blown fabric;

(2) dissolving a polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer in water, adding concentrated hydrochloric acid, stirring for reaction, adding the modified polypropylene melt-blown fabric obtained in the step (1), ethyl orthosilicate and 3-aminopropyltriethoxysilane, continuously stirring for reaction, filtering, washing, extracting and drying to obtain a blank;

(3) mixing 2-aminoterephthalic acid with an organic solvent, adding copper nitrate and 1-butyl-3-methylimidazole chloride salt, adding the blank obtained in the step (2), stirring and mixing to obtain a mixed electrolyte, inserting the pretreated copper sheet serving as an electrode into the mixed electrolyte, electrolyzing under a direct-current stabilized power supply, filtering and drying to obtain a pretreated blank;

(4) and (4) hot-pressing the pretreated blank obtained in the step (3) to obtain the high-barrier breathable medical fabric.

As optimization, the preparation process of the high-barrier breathable medical fabric mainly comprises the following preparation steps:

(1) the gram weight is 70g/m²Irradiating the polypropylene melt-blown fabric for 1-4 hours by using gamma rays to obtain pretreated polypropylene melt-blown fabric, mixing maleic anhydride and acetone according to the mass ratio of 1: 10-1: 15, stirring at room temperature until the mixture is dissolved, adding pretreated polypropylene melt-blown fabric with the mass of 0.2-0.4 time that of the acetone into the mixture of the maleic anhydride and the acetone, and performing ultra-high frequency treatment on the mixture before the mixture is subjected to frequency of 45-55 kHzSounding for 30-50 min, stirring and reacting for 4-6 h at the temperature of 100 ℃, filtering to obtain a modified polypropylene melt-blown fabric blank, and freeze-drying the modified polypropylene melt-blown fabric blank to obtain the modified polypropylene melt-blown fabric;

(2) mixing polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer and water in a mass ratio of 1: 15-1: 25 in a beaker, stirring until the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer is dissolved, adding 38% hydrochloric acid with mass fraction of 1-2 times of the mass of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer into the beaker, stirring and reacting for 4-6 h at the temperature of 50 ℃ and the rotating speed of 150-180 r/min, and then adding 8-20 times of the mass of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer into the beaker to obtain modified polypropylene melt-spray cloth, 1-4 times of the mass of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer, and 1-4 times of the mass of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer 3-aminopropyltriethoxysilane with the mass of 0.5-2.0 times of that of the polymer is continuously stirred and reacted for 24 hours at the temperature of 40 ℃ and the rotation speed of 150-170 r/min, then the mixture is reacted for 24 hours at the constant temperature of 90 ℃ and filtered to obtain a filter cake, the filter cake is washed for 2 times by deionized water and absolute ethyl alcohol respectively, extracted by petroleum ether, extracted for 5-8 hours and then dried in vacuum to obtain a blank;

(3) mixing 2-amino terephthalic acid and N, N-dimethylformamide in a mass ratio of 1: 100-1: 150 in a reaction kettle, adding copper nitrate accounting for 0.25-0.28 times of the mass of the 2-amino terephthalic acid and 1-butyl-3-methylimidazole chloride accounting for 3-4 times of the mass of the 2-amino terephthalic acid into the reaction kettle, simultaneously adding the blank obtained in the step (2) accounting for 10-40 times of the mass of the 2-amino terephthalic acid, stirring and mixing to obtain a mixed electrolyte, inserting a pretreated copper sheet serving as an electrode into the mixed electrolyte, electrolyzing under a direct-current stabilized power supply, filtering and drying to obtain a pretreated blank;

(4) and (4) carrying out hot pressing on the pretreated blank obtained in the step (3) for 10min under the conditions that the pressure is 2-4 MPa and the temperature is 130-150 ℃, and then obtaining the high-barrier breathable medical fabric.

As optimization, the irradiation dose of the gamma ray irradiation treatment in the step (1) is 15-55 kGy.

As an optimization, the preparation process of the pretreated copper sheet in the step (3) is that a copper sheet with the purity of 99.99% and the thickness of 0.5mm is cut into a shape of 1cm multiplied by 8cm, the copper sheet is polished by 600-mesh sand paper until the surface is smooth and flat to obtain a pretreated copper sheet blank, the pretreated copper sheet blank is firstly put into an acetone solution to be soaked for 15min under the condition of the frequency of 40kHz, and then is soaked for 3min in 10% dilute nitric acid at room temperature, and then is taken out, washed and dried to obtain the pretreated copper sheet.

As an optimization, the electrolysis condition of the step (3) is that the current density is 0.025A-cm^-2And the electrolysis time is 2 hours.

Compared with the prior art, the invention has the beneficial effects that:

the invention uses modified polypropylene melt-blown fabric as a raw material and adds modified nano-silica when preparing the high-barrier breathable medical fabric.

Firstly, modified polypropylene melt-blown fabric is used as a raw material, maleic anhydride is grafted on the surfaces of polypropylene fibers in the polypropylene melt-blown fabric after the polypropylene melt-blown fabric is subjected to modification treatment, so that the activity of the polypropylene melt-blown fabric is improved, and the grafted maleic anhydride can reduce the pore diameter among the fibers in the modified polypropylene melt-blown fabric after hot pressing, so that the product has air permeability and better blood barrier property;

secondly, modified nano-silica is added when the high-barrier breathable medical fabric is prepared, wherein the modified nano-silica is composed of aminated mesoporous silica and a copper ion metal organic framework material; wherein, the mesoporous silicon dioxide is a porous material with a fork-shaped structure and hollow inside, after amination, the mesoporous silicon dioxide is rich in amino, thereby improving the activity of the mesoporous silicon dioxide, after adding copper ion solution, copper ions can be absorbed in pores inside the aminated mesoporous silicon dioxide, and when preparing the copper ion metal organic framework material by electrolysis, the copper ion metal organic framework material can block the pores of the mesoporous silicon dioxide, thereby refining the pores of the mesoporous silicon dioxide, further after the modified nano silicon dioxide is added into the product, the blood barrier rate and the air permeability of the product can be further improved, meanwhile, because the copper ion metal organic framework material contains unreacted amino groups, the modified nano silicon dioxide can react with maleic anhydride in the modified polypropylene melt-blown cloth in the subsequent hot pressing process, thereby the modified nano silicon dioxide is better absorbed in the product in the form of chemical bonds, in addition, in the using process, along with the increase of air pressure, the expansion of the product can draw the copper ion metal organic framework material, so that the porosity in the modified nano silicon dioxide is improved, and the air permeability of the product is further improved.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to more clearly illustrate the method provided by the present invention, the following examples are used to describe in detail, and the method for testing each index of the high-barrier breathable medical fabric manufactured in the following examples is as follows:

and (3) testing air permeability: according to the national standard GB/T5453 'determination of air Permeability of textile fabrics', the amount of air per square meter of area (L/m) in unit time (second) is determined under the conditions of 1.3kPa (low pressure) and 10kPa (medium pressure), respectively²·s)。

And (3) testing the barrier property: measuring the high-barrier breathable medical fabric and the comparative product obtained in each example according to a qualified standard; and (4) qualified standard: the waterproof performance does not leak when the hydrostatic pressure is 1.67kPa, and the blood barrier performance does not leak under the conditions that the artificial blood with the surface tension of 0.042N/m stays for 5min without pressurization and keeps pressurizing for 1min at 13.8 kPa.

Example 1

A high-barrier breathable medical fabric mainly comprises the following components in parts by weight: 85 parts of modified polypropylene melt-blown fabric and 15 parts of modified nano silicon dioxide.

A preparation process of a high-barrier breathable medical fabric mainly comprises the following preparation steps:

(1) the gram weight is 70g/m²Performing irradiation treatment on the polypropylene melt-blown fabric by using gamma rays for 2 hours to obtain pretreated polypropylene melt-blown fabric, mixing maleic anhydride and acetone according to the mass ratio of 1:15, stirring at room temperature until the maleic anhydride and the acetone are dissolved, adding pretreated polypropylene melt-blown fabric with the mass 0.3 times that of the acetone into the mixture of the maleic anhydride and the acetone, performing ultrasonic treatment for 40 minutes under the condition of 50kHz, stirring at 100 ℃ for reaction for 5 hours, filtering to obtain a modified polypropylene melt-blown fabric blank, and freeze-drying the modified polypropylene melt-blown fabric blank to obtain the modified polypropylene melt-blown fabric;

(2) mixing polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer and water in a mass ratio of 1:20 in a beaker, stirring until the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer is dissolved, adding 38% hydrochloric acid with mass fraction 1.5 times that of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer into the beaker, stirring and reacting for 5 hours at the temperature of 50 ℃ and the rotating speed of 160r/min, and adding 12 times that of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer into the beaker to obtain the modified polypropylene melt-spray cloth, wherein the mass of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer is 3 times that of ethyl orthosilicate and the mass of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer is 1.2 times that of the 3-aminopropyl The preparation method comprises the following steps of continuously stirring and reacting triethoxy silane for 24 hours at the temperature of 40 ℃ and the rotating speed of 160r/min, reacting for 24 hours at the constant temperature of 90 ℃, filtering to obtain a filter cake, washing the filter cake with deionized water and absolute ethyl alcohol for 2 times respectively, extracting the washed filter cake with petroleum ether, extracting for 6 hours, and drying in vacuum to obtain a blank;

(3) mixing 2-amino terephthalic acid and N, N-dimethylformamide in a reaction kettle according to the mass ratio of 1:120, adding copper nitrate with the mass of 0.26 time that of the 2-amino terephthalic acid and 1-butyl-3-methylimidazole chloride with the mass of 3.5 times that of the 2-amino terephthalic acid into the reaction kettle, simultaneously adding the blank obtained in the step (2) with the mass of 25 times that of the 2-amino terephthalic acid, stirring and mixing for 40min under the conditions that the temperature is 30 ℃ and the rotating speed is 400r/min to obtain mixed electrolyte, inserting a pretreated copper sheet electrode into the mixed electrolyte, electrolyzing under a direct current stabilized power supply, filtering and drying to obtain a pretreated blank;

(4) and (4) hot-pressing the blank obtained in the step (3) for 10min under the conditions that the pressure is 2.5MPa and the temperature is 140 ℃ to obtain the high-barrier breathable medical fabric.

As optimization, the irradiation dose of the gamma ray irradiation treatment in the step (1) is 35 kGy.

As an optimization, the preparation process of the pretreated copper sheet in the step (3) is that a copper sheet with the purity of 99.99% and the thickness of 0.5mm is cut into a shape of 1cm multiplied by 8cm, the copper sheet is polished by 600-mesh sand paper until the surface is smooth and flat to obtain a pretreated copper sheet blank, the pretreated copper sheet blank is firstly put into an acetone solution to be soaked for 15min under the condition of the frequency of 40kHz, and then is soaked for 3min in 10% dilute nitric acid at room temperature to obtain the pretreated copper sheet.

As an optimization, the electrolysis condition of the step (3) is that the current density is 0.025A-cm^-2And the electrolysis time is 2 hours.

Example 2

A high-barrier breathable medical fabric mainly comprises the following components in parts by weight: 85 parts of polypropylene melt-blown fabric and 15 parts of modified nano silicon dioxide.

A preparation process of a high-barrier breathable medical fabric mainly comprises the following preparation steps:

(1) mixing polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer and water according to the mass ratio of 1:20 in a beaker, stirring until the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer is dissolved, adding hydrochloric acid with the mass fraction of 38 percent, which is 1.5 times of the mass of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer, into the beaker, stirring and reacting for 5 hours at the temperature of 50 ℃ and the rotating speed of 160r/min, and then adding the mixture into the beakerThen, the gram weight of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer in the beaker, which is 12 times of the mass of the triblock copolymer, is 70g/m²The polypropylene melt-blown cloth is characterized in that tetraethoxysilane which is 3 times of the mass of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer and 3-aminopropyltriethoxysilane which is 1.2 times of the mass of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer are continuously stirred and reacted for 24 hours at the temperature of 40 ℃ and the rotating speed of 160r/min, then the mixture is subjected to constant temperature reaction for 24 hours at the temperature of 90 ℃, and then filtered to obtain a filter cake, the filter cake is washed by deionized water and absolute ethyl alcohol for 2 times respectively, then the washed filter cake is extracted by petroleum ether, and after extraction for 6 hours, vacuum drying is carried out to obtain a blank;

(2) mixing 2-amino terephthalic acid and N, N-dimethylformamide in a reaction kettle according to the mass ratio of 1:120, adding copper nitrate with the mass of 0.26 time that of the 2-amino terephthalic acid and 1-butyl-3-methylimidazole chloride with the mass of 3.5 times that of the 2-amino terephthalic acid into the reaction kettle, simultaneously adding the blank obtained in the step (2) with the mass of 25 times that of the 2-amino terephthalic acid, stirring and mixing for 40min under the conditions that the temperature is 30 ℃ and the rotating speed is 400r/min to obtain mixed electrolyte, inserting a pretreated copper sheet electrode into the mixed electrolyte, electrolyzing under a direct current stabilized power supply, filtering and drying to obtain a pretreated blank;

(3) and (3) hot-pressing the blank obtained in the step (2) for 10min under the conditions that the pressure is 2.5MPa and the temperature is 140 ℃ to obtain the high-barrier breathable medical fabric.

As an optimization, the preparation process of the pretreated copper sheet in the step (2) is that a copper sheet with the purity of 99.99% and the thickness of 0.5mm is cut into a shape of 1cm multiplied by 8cm, the copper sheet is polished by 600-mesh sand paper until the surface is smooth and flat to obtain a pretreated copper sheet blank, the pretreated copper sheet blank is firstly put into an acetone solution to be soaked for 15min under the condition of the frequency of 40kHz, and then is soaked for 3min in 10% dilute nitric acid at room temperature to obtain the pretreated copper sheet.

As an optimization, the electrolysis condition of the step (2) is that the current density is 0.025A-cm^-2And the electrolysis time is 2 hours.

Example 3

A high-barrier breathable medical fabric mainly comprises the following components in parts by weight: 85 parts of modified polypropylene melt-blown fabric and 15 parts of aminated nano silicon dioxide.

A preparation process of a high-barrier breathable medical fabric mainly comprises the following preparation steps:

(1) the gram weight is 70g/m²Performing irradiation treatment on the polypropylene melt-blown fabric by using gamma rays for 2 hours to obtain pretreated polypropylene melt-blown fabric, mixing maleic anhydride and acetone according to the mass ratio of 1:15, stirring at room temperature until the maleic anhydride and the acetone are dissolved, adding pretreated polypropylene melt-blown fabric with the mass 0.3 times that of the acetone into the mixture of the maleic anhydride and the acetone, performing ultrasonic treatment for 40 minutes under the condition of 50kHz, stirring at 100 ℃ for reaction for 5 hours, filtering to obtain a modified polypropylene melt-blown fabric blank, and freeze-drying the modified polypropylene melt-blown fabric blank to obtain the modified polypropylene melt-blown fabric;

(2) mixing polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer and water in a mass ratio of 1:20 in a beaker, stirring until the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer is dissolved, adding 38% hydrochloric acid with mass fraction 1.5 times that of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer into the beaker, stirring and reacting for 5 hours at the temperature of 50 ℃ and the rotating speed of 160r/min, and adding 12 times that of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer into the beaker to obtain the modified polypropylene melt-spray cloth, wherein the mass of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer is 3 times that of ethyl orthosilicate and the mass of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer is 1.2 times that of the 3-aminopropyl The preparation method comprises the following steps of continuously stirring and reacting triethoxy silane for 24 hours at the temperature of 40 ℃ and the rotating speed of 160r/min, reacting for 24 hours at the constant temperature of 90 ℃, filtering to obtain a filter cake, washing the filter cake with deionized water and absolute ethyl alcohol for 2 times respectively, extracting the washed filter cake with petroleum ether, extracting for 6 hours, and drying in vacuum to obtain a blank;

(3) and (3) hot-pressing the blank obtained in the step (2) for 10min under the conditions that the pressure is 2.5MPa and the temperature is 140 ℃ to obtain the high-barrier breathable medical fabric.

As optimization, the irradiation dose of the gamma ray irradiation treatment in the step (1) is 35 kGy.

Example 4

A high-barrier breathable medical fabric mainly comprises the following components in parts by weight: 85 parts of modified polypropylene melt-blown fabric and 15 parts of copper ion metal organic framework material.

A preparation process of a high-barrier breathable medical fabric mainly comprises the following preparation steps:

(1) the gram weight is 70g/m²Performing irradiation treatment on the polypropylene melt-blown fabric by using gamma rays for 2 hours to obtain pretreated polypropylene melt-blown fabric, mixing maleic anhydride and acetone according to the mass ratio of 1:15, stirring at room temperature until the maleic anhydride and the acetone are dissolved, adding pretreated polypropylene melt-blown fabric with the mass 0.3 times that of the acetone into the mixture of the maleic anhydride and the acetone, performing ultrasonic treatment for 40 minutes under the condition of 50kHz, stirring at 100 ℃ for reaction for 5 hours, filtering to obtain a modified polypropylene melt-blown fabric blank, and freeze-drying the modified polypropylene melt-blown fabric blank to obtain the modified polypropylene melt-blown fabric;

(2) mixing 2-amino terephthalic acid and N, N-dimethylformamide in a reaction kettle according to the mass ratio of 1:120, adding copper nitrate with the mass of 0.26 time that of the 2-amino terephthalic acid and 1-butyl-3-methylimidazole chloride with the mass of 3.5 times that of the 2-amino terephthalic acid into the reaction kettle, simultaneously adding modified polypropylene melt-blown fabric with the mass of 25 times that of the 2-amino terephthalic acid obtained in the step (1), stirring and mixing for 40min under the conditions that the temperature is 30 ℃ and the rotating speed is 400r/min to obtain mixed electrolyte, inserting a pretreated copper sheet serving as an electrode into the mixed electrolyte, electrolyzing under a direct-current stabilized voltage power supply, filtering and drying to obtain a blank;

(3) and (3) hot-pressing the blank obtained in the step (2) for 10min under the conditions that the pressure is 2.5MPa and the temperature is 140 ℃ to obtain the high-barrier breathable medical fabric.

As optimization, the irradiation dose of the gamma ray irradiation treatment in the step (1) is 35 kGy.

As an optimization, the preparation process of the pretreated copper sheet in the step (2) is that a copper sheet with the purity of 99.99% and the thickness of 0.5mm is cut into a shape of 1cm multiplied by 8cm, the copper sheet is polished by 600-mesh sand paper until the surface is smooth and flat to obtain a pretreated copper sheet blank, the pretreated copper sheet blank is firstly put into an acetone solution to be soaked for 15min under the condition of the frequency of 40kHz, and then is soaked for 3min in 10% dilute nitric acid at room temperature to obtain the pretreated copper sheet.

As an optimization, the electrolysis condition of the step (2) is that the current density is 0.025A-cm^-2And the electrolysis time is 2 hours.

Comparative example

A high-barrier breathable medical fabric mainly comprises the following components in parts by weight: 55 parts of polypropylene melt-blown fabric and 15 parts of nano silicon dioxide.

A preparation process of a high-barrier breathable medical fabric mainly comprises the following preparation steps:

(1) mixing tetraethoxysilane and water according to the mass ratio of 1:20, adding hydrochloric acid with the mass fraction of 38 percent and the mass of 1.5 times of the tetraethoxysilane, stirring and reacting for 5 hours at the temperature of 50 ℃ and the rotating speed of 160r/min, and then adding 70g/m of gram weight with the mass of 12 times of the tetraethoxysilane²After stirring and reacting, filtering and drying the polypropylene melt-blown fabric to obtain a pretreated blank;

(2) and (2) hot-pressing the blank obtained in the step (1) for 10min under the conditions that the pressure is 2.5MPa and the temperature is 140 ℃ to obtain the high-barrier breathable medical fabric.

Examples of effects

The following table 1 shows the performance analysis results of the high-barrier breathable medical fabrics using examples 1 to 4 of the present invention and comparative examples.

TABLE 1

Compared with the experimental data of the comparative example and the example 1 in the table 1, the modified polypropylene melt-blown fabric is used as the base material in the preparation of the high-barrier breathable medical fabric, and the modified nano-silica is added, so that the breathability of the product can be effectively improved, and the product has good barrier property; from the comparison of the experimental data of the example 1 and the example 2, it can be found that when the modified polypropylene melt-blown fabric is not used as the base material in the preparation of the product, the polypropylene melt-blown fabric and the modified nano-silica have poor bonding property, so that the porosity of the product cannot be improved when the air pressure is increased, and the air permeability of the product is further influenced; from the comparison of experimental data of example 1 and example 3, it can be seen that when only the aminated mesoporous silica is added in the preparation of the product, the permeability of the product is good at low pressure, but, after pressurization, pores in the silica in the product are blocked, thereby affecting the permeability of the product, and after pressurization, blood can flow out of the pores, affecting the barrier property of the product; from the comparison of the experimental data of example 1 and example 4, it can be found that when only the copper ion metal organic framework material is added when the product is prepared, the air permeability of the product is improved, but the air permeability and the barrier property are both reduced after pressurization.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.