Carbon fiber reinforced thermosetting resin-based composite material and preparation method thereof

Abstract

The invention discloses a carbon fiber reinforced thermosetting resin-based composite material and a preparation method thereof, and belongs to the technical field of advanced composite materials. The preparation method comprises the following steps: sampling matrix resin, a low-shrinkage agent, a curing agent, a polymerization inhibitor, an internal release agent, a thickening agent and a dispersing aid according to the mass ratio, and conducting stirring and uniform mixing to prepare resin paste; preparing flaky carbon fiber prepreg from the resin paste and the carbon fiber non-woven fabric through a flaky molding compound process; flatly laying and overlaying the sheet-shaped carbon fiber prepreg, and conducting vacuum hot pressing and die assembly molding; and after the vacuum hot pressing die pressing is finished, and conducting cooling and demolding to obtain the carbon fiber reinforced thermosetting resin-based composite material. The preparation method has the characteristics of simple process, short production period, low energy consumption, designable strength and modulus, easiness in large-area forming, capability of meeting the forming requirements of products with complex shapes and structures and the like; and the prepared composite material has the excellent performances of high strength, high modulus, light weight, isotropy and the like.

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, automobile lightweight has become a common development goal of the industry. The carbon fiber composite material combines light weight, high strength, high specific modulus, heat resistance, corrosion resistance, strong designability and many other excellent properties, especially in terms of automobile lightweight, resin-based composite materials are 50% lighter than steel materials , 30% lighter than aluminum, is an ideal lightweight material for automobiles (Yin Mingxun, Liu Ying, Qiao Xin. Resin-based composite materials and automobile lightweight [J]. Automotive Engineer, 2019(01): 16-19 .). [0003] At pre...

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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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