An emulsion sizing agent used for carbon fibers with high wear resistance and a low moisture regain, and preparation and applications thereof

Abstract

An emulsion sizing agent used for carbon fibers with high wear resistance and a low moisture regain is disclosed. The emulsion sizing agent is characterized in that the emulsion sizing agent comprises main agents and deionized water, the mass ratio of the main agents to the deionized water is (30:70)-(55:45), and the main agents comprise 60-80 wt% of aromatic polyester polyol, 10-30 wt% of bisphenol F epoxy resin, 6-10 wt% of an anionic surfactant, 0.5-1.5 wt% of an antioxidant and 0.5-1.5 wt% of a leveling agent. The carbon fibers sized by utilizing the emulsion sizing agent are high in wear resistance, and therefore fluffiness and wire fracture in weaving processes can be reduced, and the production efficiency and benefits are increased. The sized carbon fibers are lower in moisture regain, longer in storage period and better in economic benefit. A composite material prepared is high in resistance to heat and humidity, and can be applied in a plurality of complex environment conditions, such as aviation and offshore operation. A preparing method and a using method of the emulsion sizing agent used for the carbon fibers are also disclosed.

Description

technical field [0001] The invention belongs to the field of carbon fiber chemical industry, and in particular relates to a high wear resistance and low moisture regain carbon fiber emulsion sizing agent and its preparation and application. Background technique [0002] In carbon fiber reinforced resin matrix composites, the actual interface between the two phases is a transitional whole composed of carbon fiber-sizing agent-matrix resin. Among them, the sizing agent connects the carbon fiber and the matrix resin at the same time, and is an important part of the external force transmission. When the reinforcing fibers pass through the sizing agent and the matrix resin to form a strong connection during the composite process, the shear strain at the interface can effectively transmit the load, greatly improving the overall ability of the composite material to withstand external forces. [0003] Engineering production and application experience shows that in addition to the m...

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Problems solved by technology

However, insufficient attention has been paid to the wear resistance of carbon fibers prepared by the above method, and due to the preparation of external emulsification, there are too many components such as surfactants and curing agents in the formula, the moisture regain of carbon fibers is high, and it is only effective for epoxy resin systems. better applicability

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