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A kind of small tow universal carbon fiber sizing agent, preparation method and application thereof

A carbon fiber, general-purpose technology, used in carbon fiber, fiber processing, textiles and papermaking, etc., to achieve the effects of reduced use cost, high reaction conversion rate, and improved interface bonding ability

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

It can effectively solve the problem that the current small tow carbon fiber sizing agent is only suitable for a single type of matrix resin

Method used

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  • A kind of small tow universal carbon fiber sizing agent, preparation method and application thereof
  • A kind of small tow universal carbon fiber sizing agent, preparation method and application thereof
  • A kind of small tow universal carbon fiber sizing agent, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment

[0041] 1. Preparation of sizing agent

[0042] 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, polymerization inhibitor, unsaturated acid, and catalyst (all collected from Sinopharm Chemical Reagent Co., Ltd.) into the four-necked flask in turn, control the material temperature at 70°C for 7 hours, and then raise the temperature to 120°C for 2.5 hours Then stop heating. When the temperature of the system drops to normal temperature, the stirring is stopped to obtain the unsaturated acid-modified epoxy resin sizing agent.

[0043] See Tables 1 to 2 for the types and amounts of the epoxy resin, unsaturated acid, diluent, polymerization inhibitor, and cata...

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Abstract

The invention discloses a small silk bundle universal carbon fiber sizing agent as well as a preparation method and application of the small silk bundle universal carbon fiber sizing agent. The small silk bundle universal carbon fiber sizing agent comprises the following components: bisphenol A epoxy resin, aliphatic binary monounsaturated acid of which both end groups are carboxyl, an aliphatic reactive diluent of which a molecule comprises one epoxy group, a hydroquinone polymerization inhibitor and a quaternary ammonium bromide catalyst. The small silk bundle universal carbon fiber sizing agent disclosed by the invention is applicable to sizing of industrial 1K-12K small silk bundle carbon fiber, the number-average molecular weight of a reaction product is 2500-2700, sized carbon fiber has good interface bonding strength with thermosetting resin matrixes such as epoxy resin, phenolic resin and bismaleimide resin, is good in universality, and is particularly remarkably improved in interface bonding strength with the epoxy resin and the phenolic resin.

Description

technical field [0001] The invention belongs to the field of carbon fiber sizing agents, and in particular relates to a small tow general-purpose carbon fiber sizing agent, a preparation method and an application thereof. Background technique [0002] Since FRP products made of glass fibers and organic resins have been widely used, the development and application of high-performance fiber-reinforced resin-based composite materials represented by carbon fibers has become more and more extensive. At present, the widely used T300 and T700 carbon fiber monofilaments have a diameter of about 7 microns, and the two-phase interface area after compounding with the matrix resin is about 3*10 7 cm 2 / cm 3 , the huge two-phase contact surface and its mutual bonding performance have an important impact on the comprehensive performance of the prepared composite product. In the process of carbon fiber production, after low-temperature carbonization and high-temperature carbonization tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/55D06M101/40C08G59/14
Inventor 季春晓黄翔宇曹阿民刘瑞超曹志梅常丽袁玉红张捷
Owner CHINA PETROLEUM & CHEM CORP
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