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Method for grafting modification of carbon fiber surface sizing agent through alcohol amine solution

A solution grafting, alcohol amine technology, applied in the direction of carbon fiber, fiber type, fiber treatment, etc., can solve the problem of low interface bonding strength, and achieve the effect of improving mechanical properties, improving mechanical properties, and simple and easy methods.

Active Publication Date: 2017-06-20
常州融信复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problem of low interfacial bond strength of the current carbon fiber reinforced vinyl ester resin or unsaturated polyester resin composite material, and provides a method for grafting modified carbon fiber surface sizing agent with alcohol amine solution

Method used

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  • Method for grafting modification of carbon fiber surface sizing agent through alcohol amine solution
  • Method for grafting modification of carbon fiber surface sizing agent through alcohol amine solution
  • Method for grafting modification of carbon fiber surface sizing agent through alcohol amine solution

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specific Embodiment approach 1

[0021] Embodiment 1: This embodiment is a method for grafting a modified carbon fiber surface sizing agent with an alcohol amine solution, specifically as follows:

[0022] 1. Configure the modifier solution: dissolve the modifier in a solvent to obtain a modifier solution; the mass concentration of the modifier solution is 0.5% to 5.0%; the modifier is Alcoholamine organic small molecules containing both amino groups and unsaturated double bonds;

[0023] 2. Carbon fiber surface modification: adjust the modifier solution prepared in step 1 to 50°C to 100°C, use the modifier solution at 50°C to 100°C to modify the surface of the carbon fiber, and rinse the surface treated carbon fiber with water. Dry at a temperature of 50°C to 100°C for 0.5h to 6h to obtain carbon fibers modified by chemical grafting of surface sizing agents; the carbon fibers are unidirectional carbon fibers with epoxy type sizing agents, with epoxy type Carbon fiber woven cloth with sizing, fiber mat with ...

specific Embodiment approach 2

[0025] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the molecular structure described in step 1 contains both an amino group and an unsaturated double bond. The organic small molecule of alcohol amine is 4-amino-2-butene -1-ol and 1-amino-3-buten-2-ol or a mixture of both. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0026] Embodiment 3: This embodiment is different from Embodiment 1 in that: the solvent in step 1 is water or an organic solvent. Others are the same as in the first embodiment.

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Abstract

The invention discloses a method for grafting modification of a carbon fiber surface sizing agent through an alcohol amine solution, relates to a method for modifying the carbon fiber surface sizing agent, and aims to solve the technical problem of low interface bonding strength of conventional carbon fiber enhanced vinyl ester resin or unsaturated polyester resin composite material. The method comprises the following steps: 1, preparing an alcohol amine modifier solution; 2, carrying out carbon fiber surface modification. The method disclosed by the invention is simple and feasible; the carbon fiber surface sizing agent is directly subjected to chemical grafting, so that the own strength of carbon fiber cannot be damaged; the modified sizing agent can further achieve a carbon fiber protection effect. The interface shear strength and the comprehensive mechanical properties of a composite material prepared from the modified carbon fiber and unsaturated resin are all obviously improved.

Description

technical field [0001] The invention relates to a method for modifying a carbon fiber surface sizing agent. Background technique [0002] Vinyl ester resin (VE) is a thermosetting resin obtained by reacting epoxy resin with unsaturated small molecules. Vinyl ester resin not only retains the basic chain segment of epoxy resin, inherits the excellent characteristics of epoxy resin, but also introduces unsaturated double bonds in the molecular chain, which has good process performance of unsaturated polyester resin. Therefore, vinyl ester resin has excellent performance in mechanical properties, high temperature resistance, chemical corrosion resistance, curing performance, molding performance and processing performance, and has been widely used in automobile, sports, medical and health fields. The curing mechanism of vinyl ester resin is the same as that of unsaturated polyester resin. It is the cross-linking molding between the double bonds in the resin molecule and the doub...

Claims

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Application Information

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IPC IPC(8): D06M13/368C08L63/10C08K9/04C08K7/06C08K3/04D06M101/40
CPCC08K3/04C08K7/06C08K9/04D06M13/368D06M2101/40D06M2200/40C08L63/10
Inventor 刘文博王荣国焦卫卫
Owner 常州融信复合材料有限公司