Preparation method for improving interfacial properties of carbon fiber composite material

A technology of interface properties and composite materials, which is applied in fiber treatment, textiles and papermaking, etc., can solve the problems of unstable polar groups, long reaction time, incomplete reaction, etc., to improve interface properties, facilitate processing, and improve reaction The effect of speed and degree
CN102720061BInactive Publication Date: 2014-01-08DONGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
DONGHUA UNIV
Publication Date
2014-01-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a preparation method for improving interfacial properties of a carbon fiber composite material. The method is characterized by comprising the steps of firstly, preparing plasma activated carbon fiber; secondly, preparing a maleic anhydride dimethylbenzene solution; thirdly, subjecting the activated carbon fiber to ultrasonic infiltration; fourthly, performing grafting of maleic anhydride; and fifthly, purifying a crude product of the plasma activated carbon fiber which the maleic anhydride is grafted to. The method has the advantages that the free radicals formed on the surface of carbon fiber are processed through plasmas of argon-oxygen mixed gas, so that the polymerization reaction speed of the free radicals and the maleic anhydride is accelerated and the degree us improved; the reaction speed is accelerated through a high temperature, and the grafting reaction time is only 3 min to 7 min, so that grafting carbon fiber which is uniform in surface coating and high in grafting rate and has certain quantities of anhydride groups is obtained, the grafting carbon fiber and epoxy resin are subjected to reaction well, and the interfacial properties of the composite material is improved; and the method is energy-saving, environment-friendly and convenient to process.
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Description

technical field

[0001] The invention relates to a preparation method for improving the interfacial properties of carbon fiber composite materials by using plasma activation grafted maleic anhydride, and belongs to the technical field of carbon fiber surface modification. Background technique

[0002] Carbon fiber has a series of excellent properties such as high specific strength, high specific modulus, high temperature resistance, corrosion resistance, fatigue resistance, creep resistance, electrical conductivity, heat transfer and small thermal expansion coefficient, and is widely used in fiber reinforced resin matrix composites. The surface of carbon fiber is inert, the specific surface area is small, the edge active carbon atoms are few, the surface energy is low, and the wettability of resin and the adhesion of the two-phase interface are poor. Therefore, people modify the surface of carbon fibers to improve the interfacial properties of their fiber-reinforced resin ma...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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