Toughening material of composite material and preparation method toughening material

Abstract

The invention belongs to a composite material high performance technology, relates to toughening material of composite material and a preparation method of the toughening material. The toughening material is made of non-woven cloth comprising thermoplastic polymer fiber, the thickness of the non-woven cloth is 5 to 50 micrometers, and the fiber diameter of the non-woven cloth is about 0.2 to 5 micrometers. The preparation method comprises the steps as follows: yarns are sprayed out through solution; the yarns are deposited to become the non-woven cloth; and then the fiber non-woven cloth toughening material is formed through drying and collection. The method adopting a solution spray process to prepare the non-woven cloth toughening material can effectively improve the preparation efficiency, and realize the mass manufacture of the toughening material. The toughening material prepared by the method can obviously improve the compression performance of impacted resin matrix composites, and compared with the prior art, the method has the advantages that the compression strength of the impacted resin matrix composites is improved by 50 to 150 percent, the heat resisting property and the mechanical property of composite material, as well as the flowing of resin during the forming of the composite material, are not affected, and the yield and the quality stability of the composite material are improved.

Description

technical field [0001] The invention belongs to the high-performance technology of composite materials, and relates to a toughening material of composite materials and a preparation method thereof. Background technique [0002] The high performance of advanced composite materials, especially high toughness is an important direction of advanced composite materials research. Through high toughness, it can effectively improve the impact damage resistance and design allowable strain of composite materials, and improve the weight loss efficiency of composite materials. There are mainly the following methods for the toughening of composite materials, one is rubber toughening, the other is thermoplastic polymer blending for toughening, and the third is adding rigid particles for toughening. On the basis of thermoplastic blending toughening, in the early 1990s, the toughening method of interlayer toughening was proposed, which mainly lays thermoplastic polymer powder or thermoplast...

AI Technical Summary

Problems solved by technology

Cyetec Corporation of the United States spins thermoplastic polymers into fibers, and weaves composite material reinforcements with the spun polymer fibers mixed with carbon fibers, or polymer fibers and carbon fibers are co-woven into composite material reinforcements, and then manufactures thermoplastic polymers Fiber-toughened RTM composite materials can improve the impact toughness of RTM composite materials, such as RTM molding 977-20 carbon fiber composite materials. The purpose of this method is to solve the low viscosity requirements of RTM resins and toughening requirements. Contradictory, but the toughening effect of this toughening method is very limited

In Chinese patent ZL2006100993819, the thermoplastic film placed between the layers of the reinforced fabric has achieved the purpose of toughening, and the CAI of the toughened composite material has been significantly improved, but the thermoplastic film placed between the layers will hinder the flow of RTM resin between the layers , thus increasing the difficulty for the molding process of RTM composites

However, the production efficiency of the electrospinning process is very low, which is only suitable for small-scale laboratory research and cannot meet the requirements of large-scale engineering applications

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