Wholly-aromatic polymer fiber with high compound property and preparing method thereof

Abstract

The invention discloses wholly-aromatic polymer fiber with high compound property. Wholly-aromatic polymer fiber obtained through direct fluorinated surface treatment is treated with a silane coupling agent containing amino group firstly, then hydrolysis is conducted with acid aqueous solution, and then treatment is conducted with a silane coupling agent containing amino group, epoxy group or allyl group to obtain the wholly-aromatic polymer fiber with high compound property. The surface of the fiber contains the active groups capable of reacting with matrix resin. It is found through infrared display that a Si-O-Si peak exists at the position of 1000-1100 cm<-1>, and a Si element energy spectrum peak exists at the position of 103.6 eV binding energy of an X-ray photoelectron spectroscopy diagram. Through chemical bonding of the massive active groups including amino group, epoxy group and allyl group on the surface of the fiber, the fiber can be connected with matrix resin or a curing agent system of the matrix resin through a powerful covalent bond, the bonding capacity between the fiber and the matrix resin is improved greatly, and low fluorination degree and high compound property are realized.

Description

technical field [0001] The invention belongs to the technical field of aromatic polymer fiber and its preparation, and in particular relates to an aromatic polymer fiber with high composite performance and a preparation method thereof. Background technique [0002] Aromatic polymer fibers are high-strength and high-modulus organic fibers, mainly including aromatic polyamide fibers (such as homopolymerized aramid II and copolymerized aramid III fibers) and polyparaphenylene benzobisoxazole fibers ( PBO), has been widely used in bulletproof products, building materials, special protective clothing and electronic equipment, and its composite materials made of resin have also been used in aerospace, national defense and military industries. However, due to the high crystallinity, high orientation and smooth surface structure of aromatic polymer fibers, their composite properties with resins are poor, so that the composite materials prepared by them cannot fully meet the requirem...

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Problems solved by technology

However, it has been reported in the literature (SolomunT, SchimanskiA, SturmH, et al. Efficient formation of difluorination of functionalities by direct fluorescence of polyamides [J]. Macromolecules, 2005, 38 (10): 4231-4236.), at a greater degree of fluorination, some bases of polymer fibers Groups, such as amide bonds, are easily broken in a large number during the fluorination process, resulting in a decrease in the mechanical properties of aramid fibers (LuoL, WuP, ChengZ, et al. Directfluorination of para-aramid fibers 1: Fluorination reaction process of PPTA fiber [J]. .)

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