A kind of carbon fiber reinforced thermosetting resin matrix composite material and preparation method thereof

Abstract

The invention discloses a carbon fiber reinforced thermosetting resin-based composite material and a preparation method thereof, belonging to the technical field of advanced composite materials. The preparation method of the invention is as follows: firstly, a matrix resin, a low shrinkage agent, a curing agent, a polymerization inhibitor, an internal mold release agent, a thickening agent and a dispersing aid are sampled and mixed uniformly according to the mass ratio to obtain a resin paste; The carbon fiber non-woven fabric is prepared into a sheet-like carbon fiber prepreg by a sheet-like molding compound process; the sheet-like carbon fiber prepreg is laid flat and superimposed, vacuum hot-pressed, and the mold is closed; That is, the carbon fiber reinforced thermosetting resin matrix composite material is obtained. The invention has the characteristics of simple process, short production cycle, low energy consumption, designable strength and modulus, easy large-area molding, and can meet the molding requirements of products with complex shapes and structures, and the like, and the prepared composite material has high strength and modulus. High, light weight, isotropic and other excellent properties.

Description

technical field [0001] The invention relates to the field of advanced composite materials, in particular to a carbon fiber reinforced thermosetting resin-based composite material and a preparation method thereof. Background technique [0002] With the rapid development of the automobile industry and the country's gradual emphasis on environmental protection issues, vehicle lightweighting has become the common development goal of the industry. Carbon fiber composite materials combine many excellent properties such as light weight, high strength, high specific modulus, heat resistance, corrosion resistance, and strong designability. Especially in terms of automotive lightweight, resin-based composite materials are 50% lighter than steel materials. , which is 30% lighter than aluminum, and is an ideal automotive lightweight material (Yin Mingxun, Liu Ying, Qiao Xin. Resin-based composite materials and automotive lightweighting [J]. Automotive Engineer, 2019(01): 16-19 .).) ...

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Problems solved by technology

The selection of carbon fiber pays more attention to the improvement of the strength of the composite material. When preparing the prepreg, the carbon fiber is cut to a fixed length (Li Cuiyan, A preparation method of chopped carbon fiber reinforced phenolic resin-based composite material. Shaanxi Province, Shaanxi University of Science and Technology, 2010- 08-01.), continuous filament (Li Chao, Yan Chun, Wang Xiang, Xu Haibing, Chen Mingda, Wang Hao, Tu Liyan, Liu Dong, Chen Gang. Study on Toughening and Modification of Continuous Carbon Fiber Reinforced Epoxy Resin Matrix Composites Progress [J]. Plastic Science and Technology, 2016,44(04):100-105.) and woven fabrics (Sha Di, Yu Xumin, Zhao Jiang, Ma Xiaofei, Wang Hanfu, Liu Fangfang, Qiu Xuepeng. Carbon fiber three-way fabric / epoxy resin Preparation and mechanical properties of composite materials [J]. Chemical Journal of Chinese Universities, 2020, 41(04):838-845.) Most of the forms are complex, the operation is relatively complicated, the cost is high, and even the composite materials cannot be fully impregnated. It is anisotropic, and automotive materials not only have requirements for strength, but also have high requirements for modulus, while the elastic modulus of general resin matrix composite materials is low, which is only one tenth of that of structural steel. The range is very limited

[0004] The traditional molding methods of resin-based composite materials mainly include hand lay-up molding, compression molding, lamination molding, and winding molding (Zhengliang Cui, Qiang Liu, Yubo Sun, et al. On crushing responses of filamentwinding CFRP / aluminum and GFRP / CFRP / Aluminum hybrid structures.2020, 200), these molding operations are simple, the equipment cost is relatively low, but the production efficiency is low, and it is not suitable for mass production; the resin transfer molding process (Yan Yehai, Zhao Tong, Yu Yunzhao. Composite resin transfer molding Plastic process and applicable resin [J]. Polymer Bulletin, 2001 (03): 24-35.) and pultrusion process (Makoto Okamoto, Shuntaro Kuriyama. Method and apparatus forming thermosetting composite material [P]. US: 20050140045, 2005 -06-30) has high production efficiency, but high investment cost

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