Preparation method of modified graphene oxide polyurethane coating layer material

A graphene polyurethane and oxide stone technology, which is applied in the field of preparation of modified graphene oxide polyurethane coating materials, can solve the problems of poor high temperature performance of polyurethane, increased residue rate, filter blockage, etc., and achieves improved ablation resistance. performance, reducing residue rate, improving Young's modulus

Active Publication Date: 2021-09-10
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the poor high temperature performance of the existing polyurethane, in the actual application process, inorganic fillers (such as aluminum hydroxide, etc.) must be added to the components of the polyurethane coating layer to improve the ablation resistance, but the addition of fillers will cause the residue rate increase, causing problems such as filter clogging, the invention provides a method for preparing a modified graphene oxide polyurethane coating material with reduced combustion residue rate and bubble content, and improved Young's modulus and ablation resistance

Method used

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  • Preparation method of modified graphene oxide polyurethane coating layer material
  • Preparation method of modified graphene oxide polyurethane coating layer material
  • Preparation method of modified graphene oxide polyurethane coating layer material

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Embodiment 1 prepares the polyurethane coating layer of MGO content 2%

[0025] (1) Weigh 2gA component and 84mgMGO powder, and mix;

[0026] (2) Add an appropriate amount of butyl acetate, stir evenly and then ultrasonically disperse for 30 minutes;

[0027] (3) The mixed solution was incubated at 50°C for 48h to remove butyl acetate;

[0028] (4) Add 2.2g of component B and 0.42g of butyl acetate, and stir evenly;

[0029] (5) Keep the above mixed solution at a vacuum of 0.098MPa for 5min;

[0030] (6) Pour into a mold and cure at 45° C. for 24 hours to prepare a sample.

Embodiment 2

[0031] Embodiment 2 prepares the polyurethane coating layer of MGO content 3%

[0032] (1) Weigh 2gA component and 126mgMGO powder, and mix;

[0033] (2) Add an appropriate amount of butyl acetate, stir evenly and then ultrasonically disperse for 30 minutes;

[0034] (3) The mixed solution was incubated at 50°C for 48h to remove butyl acetate;

[0035] (4) Add 2.2g of component B and 0.42g of butyl acetate, and stir evenly;

[0036] (5) Keep the above mixed solution at a vacuum of 0.098MPa for 5min;

[0037] (6) Pour into a mold and cure at 45° C. for 24 hours to prepare a sample.

Embodiment 3

[0038] Embodiment 3 prepares the polyurethane cladding layer of MGO content 5%

[0039] (1) Weigh 2gA component and 0.21gMGO powder, and mix;

[0040] (2) Add an appropriate amount of butyl acetate, stir evenly and then ultrasonically disperse for 30 minutes;

[0041] (3) The mixed solution was incubated at 50°C for 48h to remove butyl acetate;

[0042] (4) Add 2.2g of component B and 0.42g of butyl acetate, and stir evenly;

[0043] (5) Keep the above mixed solution at a vacuum of 0.098MPa for 5min;

[0044] (6) Pour into a mold and cure at 45° C. for 24 hours to prepare a sample.

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Abstract

The invention discloses a preparation method of a modified graphene oxide polyurethane coating layer material. The method first adds isophorone diisocyanate-modified graphene oxide to component A of the polyurethane coating layer, adds butyl acetate, and ultrasonically disperses to obtain a mixed solution of MGO / component A, and then dries the mixed solution to remove acetic acid Butyl ester, add B component, and add 10-15% butyl acetate of the total mass of A and B, stir evenly, vacuumize, pour into a mold to solidify, and obtain a modified graphene oxide polyurethane coating layer material. In the present invention, the introduction of modified graphene oxide improves the Young's modulus of the coating layer material, and the prepared modified graphene oxide polyurethane coating layer material not only significantly reduces the residue rate, but also shows good burning resistance corrosion performance.

Description

technical field [0001] The invention belongs to the technical field of preparation of coating layer materials, and relates to a preparation method of modified graphene oxide polyurethane coating layer materials. Background technique [0002] The cladding layer is an important part of the solid rocket propellant charge and a decisive factor affecting the working state and service life of the rocket engine. The cladding layer has the functions of limited combustion, heat insulation and buffering, which can limit the surface combustion of the charge to control the burning area of ​​the charge, meet the internal ballistic performance of the rocket engine, prevent high-temperature gas from damaging the combustion chamber shell, and buffer the gap between the shell and the propellant. stress transfer between them. The cladding layer has higher requirements on the material's ablation resistance, bond strength, resistance to small molecule migration, mechanical properties and combu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/08C08G18/75C08K9/00C08K3/04
CPCC08G18/0852C08G18/755C08K9/00C08K3/042
Inventor 姜炜赵刘明陈腾李枭铭李强郝嘎子胡玉冰
Owner NANJING UNIV OF SCI & TECH
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