Surface treatment method of aramid fiber III

Abstract

The invention provides a surface treatment method of aramid fiber III, comprising preparation of surface treating agent, surface treatment, drying and the like. The method can improve the flexibility of the aramid fiber III, perfects hand feeling, reduces strength loss caused by factors such as bending and the like in the subsequent operation process, and more importantly improves the surface polarity of the aramid fiber III, thus improving the interface adhesive property of aramid fiber III / epoxy composite material, and further enhancing the interlaminar shear strength of the aramid fiber III / epoxy composite material, wherein the interlaminar shear strength reaches 45-55Mpa. Furthermore, the method is simple and safe in operation, and solvent can be recovered, so that on-line continuous treatment can be easily realized; and the performance of the aramid fiber III is not attenuated, and the aramid fiber III / epoxy resin prepared by aramid fiber which is placed for a longer time has the shear strength being the same as that of the aramid fiber III / epoxy resin treated just now.

Description

Technical field

[0001] The present invention relates to a surface treatment method, more specifically, the present invention relates to a surface treatment method of Aramid III. Background technique

[0002] As a kind of high-strength and high-modulus organic fiber, aramid has a wide range of applications in many fields due to its excellent comprehensive properties. Aramid III is a modified aramid with a heterocyclic structure in its molecular chain, so it is also called heterocyclic aramid. Heterocyclic aramid fiber has better mechanical properties than para-aramid (aramid 1414). For example, the tensile strength and tensile modulus of Russian heterocyclic aramid Apmoc are respectively higher than those of para-aramid Kevlar-produced by DuPont. 49 is 38% and 20% higher. Therefore, heterocyclic aramid is gradually becoming the preferred structural material for aerospace and military industries. Its winding-reinforced epoxy composite is an ideal material for solid rocket engine ...