1. The synthesis method of the coating material is characterized in that the coating material is synthesized by biomass derivative heavy oil, urea or other materials through hydrothermal reaction; the preparation method of the coating material comprises the steps of uniformly mixing heavy oil obtained by cracking, urea or other substances, adding a toluene solvent into a system, and finally filling nitrogen with certain pressure; the biomass derivative of the coating material is selected from heavy oil produced by biomass pyrolysis; the coated object of the coating material is selected from urea or any other material; the solvent is selected from toluene or no solvent; the reaction conditions required in the preparation process of the coating material are as follows: the reaction temperature is 100-300 ℃, the pressure of nitrogen gas is 1-5 MPa, and the reaction time is 2-10 h.

2. The method of claim 1, wherein the biomass derivative of the coating material can be replaced by a plurality of biomasses to produce heavy oil.

3. The method as claimed in claim 2, wherein the coating material is selected from urea or compound of phosphorus and potassium or any other material.

4. The method as claimed in claim 3, wherein the solvent for hydrothermal reaction of the coating material is toluene or no solvent.

5. The method for synthesizing the cladding material according to claim 4, wherein the reaction conditions required by the preparation process of the cladding material are as follows: the reaction temperature is 100-300 ℃, the pressure of nitrogen gas is 1-5 MPa, and the reaction time is 2-10 h.

6. Use of a method of synthesis of a coating material according to claims 1-5 in urea dissolution experiments.

Background

The coating materials are receiving wide attention for their great application in industrial production and environmental protection, and these applications include gas storage, carbon fixation, catalysts, adsorbents, catalytic carriers and fuel cells, etc., which have wide market demands. In addition, the coating material can also be applied to the preparation of materials with a core-shell structure, and has wide application space.

At present, the process of preparing the coating material is complex, time and labor are wasted, the cost is too high, and the material performance is not good. Therefore, there is a need to develop a new preparation method for producing coating materials with high efficiency and low cost.

Disclosure of Invention

The invention provides a synthetic method of a coating material, and solves the technical problems of complex operation and high cost of a preparation method of the coating material in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: preparing heavy oil by using biomass as a raw material, selecting urea or a compound of phosphorus and potassium or other materials, selecting methylbenzene as a solvent, filling a certain amount of nitrogen into a closed reaction kettle by using a hydrothermal reaction, and cooling and taking out the mixture after a period of time; the reaction conditions required in the preparation process of the coating material are as follows: the reaction temperature is 100-300 ℃, the pressure of nitrogen gas is 1-5 MPa, and the reaction time is 2-10 h.

The synthesis method of the coating material is characterized in that the coated object of the coating material can be selected from urea or a compound of phosphorus and potassium or any other material.

The method for synthesizing the coating material is characterized in that the coated object of the coating material can be selected from urea or a compound of phosphorus and potassium or any other material.

The synthesis method of the coating material is characterized in that the solvent of the hydrothermal reaction of the coating material can be toluene or solvent-free.

The synthesis method of the coating material is characterized in that the reaction conditions required in the preparation process of the coating material are as follows: the reaction temperature is 100-300 ℃, the pressure of nitrogen gas is 1-5 MPa, and the reaction time is 2-10 h.

The invention has the beneficial effects that: according to the invention, the heavy oil is coated on the outer surface of the urea through a hydrothermal reaction, so that the coating material with the core-shell structure is successfully prepared, the production cost can be obviously reduced, and the preparation method has the advantages of short preparation time, easiness in reaction control and the like. The prepared coating material can be applied to urea dissolution experiments.

Drawings

FIG. 1 is a flow chart used in example 1;

FIG. 2 is the specific surface area of the prepared material;

FIG. 3 shows the results of a urea elution test.

Detailed Description

The embodiments of the present invention will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. 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.

Example 1

(1) 20g of sawdust is weighed and cracked, and the product is separated to obtain heavy oil.

(2) Weighing 10g of heavy oil and 10g of urea, mixing uniformly, and adding into a hydrothermal reaction kettle.

(3) 10g of toluene is added as a solvent, and the mixture is uniformly mixed for hydrothermal reaction.

(4) The reaction temperature is 200 ℃, the reaction time is 4h, and the nitrogen pressure is 3 MPa. After the reaction was completed, it was cooled to room temperature, and the solid was taken out.

(5) The obtained coating material was subjected to a urea elution test.

Example 2

(1) 20g of sawdust is weighed and cracked, and the product is separated to obtain heavy oil.

(2) Weighing 10g of heavy oil and 10g of urea, mixing uniformly, and adding into a hydrothermal reaction kettle.

(3) The hydrothermal reaction is directly carried out without adding a solvent.

(4) The reaction temperature is 200 ℃, the reaction time is 4h, and the nitrogen pressure is 3 MPa. After the reaction was completed, it was cooled to room temperature, and the solid was taken out.

(5) The obtained coating material was subjected to a urea elution test.

Example 3

(1) 20g of sawdust is weighed and cracked, and the product is separated to obtain heavy oil.

(2) Weighing 10g of heavy oil and 5g of urea, mixing uniformly, and adding into a hydrothermal reaction kettle.

(3) 10g of toluene is added as a solvent, and the mixture is uniformly mixed for hydrothermal reaction.

(4) The reaction temperature is 200 ℃, the reaction time is 4h, and the nitrogen pressure is 3 MPa. After the reaction was completed, it was cooled to room temperature, and the solid was taken out.

(5) The obtained coating material was subjected to a urea elution test.

Example 4

(1) 20g of sawdust is weighed and cracked, and the product is separated to obtain heavy oil.

(2) Weighing 5g of heavy oil and 10g of urea, mixing uniformly, and adding into a hydrothermal reaction kettle.

(3) 10g of toluene is added as a solvent, and the mixture is uniformly mixed for hydrothermal reaction.

(4) The reaction temperature is 200 ℃, the reaction time is 4h, and the nitrogen pressure is 3 MPa. After the reaction was completed, it was cooled to room temperature, and the solid was taken out.

(5) The obtained coating material was subjected to a urea elution test.

Example 5

(1) 10g of urea was weighed and then 10g of toluene was added to conduct hydrothermal reaction.

(2) The reaction temperature is 200 ℃, the reaction time is 4h, and the nitrogen pressure is 3 MPa. After the reaction was completed, it was cooled to room temperature, and the solid was taken out.

(3) The obtained coating material was subjected to a urea elution test.

Example 6

(1) 10g of urea is weighed and directly subjected to hydrothermal reaction.

(2) The reaction temperature is 200 ℃, the reaction time is 4h, and the nitrogen pressure is 3 MPa. After the reaction was completed, it was cooled to room temperature, and the solid was taken out.

(3) The obtained coating material was subjected to a urea elution test.

Example 7

(1) 20g of sawdust is weighed and cracked, and the product is separated to obtain heavy oil.

(2) Weighing 10g of heavy oil and 10g of urea, mixing uniformly, and adding into a hydrothermal reaction kettle.

(3) 10g of toluene is added as a solvent, and the mixture is uniformly mixed for hydrothermal reaction.

(4) The reaction temperature is 300 ℃, the reaction time is 2h, and the nitrogen pressure is 3 MPa. After the reaction was completed, it was cooled to room temperature, and the solid was taken out.

(5) The obtained coating material was subjected to a urea elution test.

The invention has the beneficial effects that: the invention successfully prepares the coating material by coating the heavy oil on the outer surface of the urea by using a hydrothermal reaction, and is applied to a urea dissolution experiment. Can obviously reduce the production cost and has the advantages of short preparation time, easy control of reaction and the like.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.