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Solidified and modified lignin epoxy resin/ carbon fiber reinforced composite material and preparation method and application

A technology of reinforced composite materials and plain epoxy resin, which is applied in the field of composite materials, can solve the problems that the toughness needs to be further improved, and achieve the effects of enhancing toughness, improving toughness and enhancing compatibility

Active Publication Date: 2019-08-27
山西生物质新材料产业研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The three-dimensional cross-network structure formed by introducing lignin into epoxy resin also improves the toughness of composite materials to a certain extent, but its toughness still needs to be further improved

Method used

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  • Solidified and modified lignin epoxy resin/ carbon fiber reinforced composite material and preparation method and application
  • Solidified and modified lignin epoxy resin/ carbon fiber reinforced composite material and preparation method and application
  • Solidified and modified lignin epoxy resin/ carbon fiber reinforced composite material and preparation method and application

Examples

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Effect test

preparation example 1

[0049] Add 90g of ethylene glycol into the reaction vessel, add 62g of enzymatic lignin and 90g of maleic anhydride under stirring conditions, then add 10g of 50wt% aqueous sulfuric acid as a catalyst, stir and mix thoroughly, and react at 140°C for 4 hours, About 240 g of oil were obtained. Then add 480g of ethylene glycol diglycidyl ether, continue the reaction at 100°C for 2 hours, cool to room temperature, and obtain about 720g of viscous liquid, which is the product lignin epoxy resin, with a viscosity of 10000mPa·s and an epoxy value of 0.41eq / 100g.

preparation example 2

[0051] Add 90g propylene glycol in the reaction vessel, add 62g enzymatic lignin under stirring condition, 1144g phthalic anhydride, then add 10g 55wt% sulfuric acid aqueous solution as catalyst, stir and mix fully, react at 130 ℃ for 5 hours, get Approx. 296g oil. Then add 596g of propylene glycol diglycidyl ether, continue to react at 100°C for 2 hours, and cool to room temperature to obtain about 888g of viscous liquid, which is the product lignin epoxy resin. Its viscosity is 11000mPa·s, and the epoxy value is 0.42eq / 100g.

preparation example 3

[0053] The preparation method is the same as that of Preparation Example 1, except that the epoxy diluent ethylene glycol diglycidyl ether is used in an amount of 456 g. Finally, about 696g of viscous liquid was obtained, namely the product lignin epoxy resin, with a viscosity of 11000mPa·s and an epoxy value of 0.42eq / 100g.

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Abstract

The invention provides a solidified and modified lignin epoxy resin / carbon fiber reinforced composite material and a preparation method and application. The solidified and modified lignin epoxy resin / carbon fiber reinforced composite material is prepared from lignin epoxy resin and a carbon fiber material through cross-linking and solidifying, wherein an anhydride solidifying agent contains anhydrides formed by connecting siloxane chain segments. The lignin epoxy resin / carbon fiber reinforced composite material solidified by the solidifying agent is excellent in comprehensive mechanical property, while other mechanical properties of the composite material are not affected, the toughness of the material is greatly enhanced, the impact strength is obviously improved, the application rangeis expanded, the surface life is prolonged, and the composite material is very suitable for industrial production and commercial popularization.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a lignin epoxy resin / carbon fiber reinforced composite material, its preparation method and application. Background technique [0002] Carbon fiber is an inorganic fiber material with a carbon content of more than 90%. It has the advantages of low density, high specific strength, high specific modulus, high temperature corrosion resistance, and chemical stability. It is widely used in aerospace, automobiles, electronics, sporting goods, Medical equipment and other fields. Carbon fiber reinforced resin matrix composite material is one of the most important application fields of carbon fiber. It refers to the use of carbon fiber and matrix resin as raw materials, which are processed into material products that can meet the requirements of use through different processing methods. The choice of matrix resin largely determines the environmental resistance and mechanical ...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08K7/06C08G59/42
CPCC08K7/06C08G59/4238C08G59/423C08L63/00
Inventor 贾杨杰谢卓方品文
Owner 山西生物质新材料产业研究院有限公司
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