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Preparation method of water-based carbon fiber sizing agent

A technology of carbon fiber and sizing agent, which is applied in the direction of carbon fiber, wear-resistant fiber, fiber type, etc., and can solve problems such as insufficient bonding force between sizing agent, carbon fiber and resin, decreased interlayer shear strength of composite materials, and insufficient carbon fiber sizing performance. , to achieve good clustering, short preparation time and moderate slurry viscosity

Inactive Publication Date: 2018-09-04
NANTONG UNIVERSITY
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] At present, the carbon fiber sizing agent still has the following main problems: (1) The preparation time is too long; (2) The carbon fiber sizing performance is insufficient, and the clustering property is poor; (3) The environmental adaptability is poor. Rapid decline in strength; (3) Insufficient bonding between sizing agent, carbon fiber and resin

Method used

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Embodiment Construction

[0014] A preparation method of water-based carbon fiber sizing agent, comprising the following production steps:

[0015] 1) Prepare special emulsifier for carbon fiber water-based sizing agent: Stir PEG6000 and epoxy resin at a temperature of 85°C at a mass ratio of 1:5-10, and add dropwise an amount equivalent to 40-50% of the weight of epoxy resin The boron trifluoride-diethyl ether complex is used as an initiator to prepare an epoxy resin emulsifier;

[0016] 2) Preparation of acrylic modified epoxy resin emulsion: by weight: Pour 79-82 parts of epoxy resin and 3.3-3.5 parts of acrylic acid into the reaction kettle, stirring speed 300r / min, temperature 90 ℃, after mixing evenly , add 1-3 parts of benzoyl peroxide to the reactor several times, react for 1.5 hours, lower the temperature to 75°C, adjust the pH value to 7, then raise the temperature to 85°C, and add 14-20 parts of Pour the epoxy resin emulsifier into the reaction kettle with a stirring speed of 2500r / min. Aft...

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Abstract

The invention discloses a preparation method of a water-based carbon fiber sizing agent. The method comprises the following production steps that 1, an emulgator special for the carbon fiber water-based sizing agent is prepared; 2, acrylic-modified epoxy resin emulsion is prepared; 3, nano SiO2 particles dispersed by a coupling agent are poured into a reaction kettle, and after even mixing, the water-based carbon fiber sizing agent is obtained. The method has the advantages that the preparation technology of the sizing agent is simple, and preparation time is short; the sizing agent is moderate in viscosity, small in particle size and low in water absorption, emulsion is stable and environmentally friendly, and binding force between the sizing agent and carbon fibers is strong; the shear strength between sizing and a resin material is enhanced, and the abrasion resistance of the sizing is certainly improved.

Description

technical field [0001] The invention relates to a preparation method of a water-based carbon fiber sizing agent. Background technique [0002] Carbon fiber has a series of excellent functions, such as high specific strength, high temperature resistance, corrosion resistance, electrical conductivity, heat transfer, and small thermal expansion coefficient. However, due to the brittleness of carbon fiber, in the process of processing, it is easy to form hairs due to friction with machinery, which reduces its strength, affects the environment, and affects the normal operation of machinery. In addition, this will inevitably affect the interface between resin and fiber. influences. Through the sizing process, a protective layer is formed on the surface of the carbon fiber, which not only protects the carbon fiber itself, but also reduces the impact on the environment. [0003] At present, there are still the following main problems in carbon fiber sizing agents: (1) The preparat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/55D06M11/79D06M13/513C08F283/10C08F220/06D06M101/40
CPCD06M15/55C08F283/10D06M11/79D06M13/513D06M2101/40D06M2200/35D06M2200/40D06M2200/50C08F220/06
Inventor 崔建伟周红霞郭丽娟
Owner NANTONG UNIVERSITY
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