Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (09): 203-210.doi: 10.13475/j.fzxb.20210104508

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Review on toughening modification of carbon fiber/epoxy resin composites

XU Mingtao, JI Yu, ZHONG Yue, ZHANG Yan, WANG Ping, SUI Jianhua, LI Yuanyuan()   

  1. College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215006, China
  • Received:2021-01-20 Revised:2022-05-31 Online:2022-09-15 Published:2022-09-26
  • Contact: LI Yuanyuan E-mail:yyli2017@suda.edu.cn

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Abstract:

The brittle fracture of carbon fiber/epoxy resin composites can be improved by resin toughening and fiber modification. This paper reviewed the research progress of carbon fiber reinforced epoxy resin composites from three aspects: resin modification, interface modification and structure design. The toughness of epoxy resin was improved by increasing the bonding between filled particles and resin by modifying nano materials, rubber elastomer and thermoplastic resin. The interfacial modification was mainly the surface modification of carbon fiber. By increasing the surface active functional groups of carbon fiber or enhancing the surface modification at multiple scales, the interfacial bond between carbon fiber and epoxy resin is enhanced to toughen the composites. The structural design of composite materials was focused on the design of the fiber laying angle, thickness and structure, in order to enhance the toughness of composite materials through structural optimization. Finally, the problems of the three modification methods were analyzed, and the future research directions of composite modification were pointed out based on the combination of the three modification methods.

Key words: carbon fiber/epoxy resin composite, resin toughening, surface modification, toughening mechanism, structural design

CLC Number: 

  • TS195.6

Fig.1

Molecular model of functionalized silica nanoparticles"

Tab.1

Partial research results of epoxy resin modification"

填料 提升百分率/% 参考
文献
拉伸强度 弹性模量 冲击强度 断裂韧性
CTBN 440 [31]
CTBN 56.0 [32]
CTBN 2.7 5.5 20.9 [33]
ATBN 64 [35]
HTBN 28.5 [36]
VTBN 283 [37]
PBAE 100 [38]
聚砜型聚合物 111 [39]
聚醚醚酮聚合物 103 [40]
PSF/GO 8.8 2.3 90 [41]
四氨基甲酸酯 196.0 227 [42]

Tab.2

Partial results of surface modification of carbon fiber"

改性方法 提升百分率/% 参考
文献
层间剪切强度 拉伸强度 断裂韧性
电聚合 135.0 [45]
电聚合 31.2 64.0 [46]
E-GO接枝 97.7 [47]
多壁碳纳米管接枝 106.5 33.0 [48]
CNTs接枝 86.8 [49]

Fig.2

SEM images of CF before and after modification. (a) Unmodified CF; (b) APS modified CF;(c) APS and CNT modified CF"

Fig.3

SEM images of fracture surfaces in composite with different ply direction"

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