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A kind of modified epoxy resin universal carbon fiber sizing agent, preparation method and application

A technology of epoxy resin and carbon fiber, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc., to achieve the effect of excellent temperature resistance, strong versatility, and improved interface bonding strength

Active Publication Date: 2020-09-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem that the current small tow carbon fiber sizing agent is only applicable to a single type of matrix resin, the present invention provides a modified epoxy resin universal carbon fiber sizing agent, preparation method and application that can be applied to various types of matrix resin systems

Method used

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  • A kind of modified epoxy resin universal carbon fiber sizing agent, preparation method and application
  • A kind of modified epoxy resin universal carbon fiber sizing agent, preparation method and application
  • A kind of modified epoxy resin universal carbon fiber sizing agent, preparation method and application

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Embodiment

[0046] 1. Preparation of sizing agent

[0047] Put a certain amount of epoxy resin (US Shell Company) in a four-necked flask with a mechanical stirring device, heat it to 110°C, and keep a vacuum pressure of 10-0.5mmHg for 2 hours to dehydrate until the system is completely free of bubbles. Cool down to 70°C, feed 99.999% high-purity nitrogen gas, and remove the vacuum device at the same time. Add quantitative diluent, inorganic inhibitor, unsaturated acid, and imidazole catalyst (all collected from Sinopharm Chemical Reagent Co., Ltd.) into the four-necked flask in turn, control the temperature of the material at 70°C for 7 hours, and then raise the temperature to 120°C After 2.5 hours of reaction, the heating was stopped. When the temperature of the system drops to normal temperature, the stirring is stopped to obtain the unsaturated acid-modified epoxy resin sizing agent.

[0048] See Tables 1 to 2 for the types and amounts of the epoxy resin, unsaturated acid, diluent, i...

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Abstract

The invention discloses a universal carbon fiber sizing agent for modified epoxy resin, and a preparation method and an application thereof. The carbon fiber sizing agent comprises epoxy resin, an aliphatic binary monounsaturated acid with two end groups being carboxyl groups, an aromatic active diluent with the molecule containing an epoxy group, an inorganic polymerization inhibitor and an imidazole catalyst. The sizing agent prepared in the invention is suitable for sizing 1-12 K small-filament bundle carbon fibers for aviation and spaceflight, the maximum decomposition peak temperature of a reaction product is more than 330 DEG C, and sized carbon fibers have good interface binding strength with the epoxy resin, phenolic resin, bimaleimide resin and other thermosetting resin matrixes, have strong versatility, and especially have substantially improved interface bonding strength with the bimaleimide resin.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber sizing agents, and in particular relates to a modified epoxy resin general-purpose carbon fiber sizing agent, a preparation method and an application. Background technique [0002] Carbon fiber is an inorganic fiber material with a carbon content of more than 90% in the main body of the fiber. It has excellent mechanical and physical properties such as high strength and high modulus, and is a new material with broad application prospects. Since 2000, the aerospace industry has led the development of my country's carbon fiber industry as the main target customer. Among them, the small tow carbon fiber represented by 1K ~ 12K has obtained basic certification in the fields of fighter jets, helicopters, civil aviation airliners, rockets, and artificial satellites. And enter the practical stage. With the in-depth application of carbon fiber composite materials in the aerospace field, users in this...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/55C08G59/14D06M101/40
Inventor 季春晓黄翔宇顾文兰曹阿民刘瑞超曹志梅张捷郑彩红
Owner CHINA PETROLEUM & CHEM CORP
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