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Carbon fiber modifying coating and its preparation method

A technology for modifying coatings and carbon fibers, which is applied in the chemical characteristics of fibers, textiles and papermaking, chemical post-treatment of rayon, etc., and can solve problems such as failure to achieve expected performance, complex and changeable interfaces, etc.

Active Publication Date: 2006-02-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the complex and changeable interfacial phase between carbon fiber and polymer in the existing composite materials, so that the defect that the material cannot achieve the ideal expected performance during use, the present invention utilizes cage-type silsesquioxane containing suitable functional groups (POSS) is used as a coating to treat the carbon fiber surface, thereby introducing active functional groups on the carbon fiber surface that match the resin structure

Method used

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  • Carbon fiber modifying coating and its preparation method
  • Carbon fiber modifying coating and its preparation method
  • Carbon fiber modifying coating and its preparation method

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specific Embodiment approach 1

[0010] Embodiment 1: The carbon fiber modified coating in this embodiment is composed of carbon fiber and surface coating, the coating is a cage-type silsesquioxane coating, and the cage-type silsesquioxane coating is coated on the carbon fiber on the outer surface. The thickness of the cage-type silsesquioxane coating in this embodiment is 100-300 nm, wherein the structural formula of the cage-type silsesquioxane is: , where R is H, alkyl, alkenyl, aryl, aralkenyl or derivatives thereof, and R' is an active functional group.

specific Embodiment approach 2

[0011] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that R can be cyclohexyl, cyclopentyl or isobutyl; active functional groups can be chlorine, acids, alcohols, amino groups, alkyl groups, acrylates Hydrogen, Epoxy, Styryl, Olefin, Nitrile, Hydrogen, Isocyanate, Bisphenol or Hydroxide.

specific Embodiment approach 3

[0012] Specific embodiment 3: The difference between this embodiment and specific embodiments 1 and 2 is that for the carbon fiber and non-polar polyarylene system, this embodiment selects the following four POSS:

[0013]

[0014] a) Octavinyl cage silsesquioxane b) Octamethyl cage silsesquioxane

[0015]

[0016] c) Methacryloxyisobutyl cage silsesquioxane d) Hydroxyphenyl cage silsesquioxane

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Abstract

The carbon fiber modified coating and its preparation process belongs to the field of composite material interface modification technology, and aims at making the interface between carbon fiber and polymer in the composite material maintain unchanged and the composite material reaching predicted use performance. The carbon fiber modified coating is cage sesquisiloxane coating prepared through eliminating original coating in the surface of carbon fiber, soaking in cage sesquisiloxane solution to form cage sesquisiloxane coating on the surface of fiber, and stoving. The present invention introduces single functional group matching the resin structure to the surface of carbon fiber. By means of modifying the surface of carbon fiber with POSS coating of different functional groups, the present invention has raised resin wettability, increased surface roughness and greatly raised interface adhering performance of composite material while maintaining carbon fiber strength unchanged.

Description

Technical field: [0001] The invention belongs to the technical field of interface modification of composite materials. Background technique: [0002] Advanced polymer matrix composites play an important role in aviation, aerospace, military, construction and other fields, and the interface is a unique and extremely important component of composite materials, which plays an important and even decisive role in the performance of materials , has been recognized as a basic and common research topic throughout the development of composite materials. The interface directly affects the stress transfer and dispersion between the composite fiber and the matrix, thereby affecting the off-axis performance of the composite material; the interface characteristics also affect the damage accumulation and crack propagation process inside the composite material, thereby affecting the fracture toughness of the composite material; In addition, the interface also affects the environmental stab...

Claims

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Application Information

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IPC IPC(8): D01F11/14
Inventor 黄玉东张学忠刘立洵刘丽王天玉胡立江
Owner HARBIN INST OF TECH
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