Interface strengthening and high-value recycling of epoxy resin/carbon fiber fabric composites

被引：35

作者：

Xu, Haifeng ^{[1
,2
]}

Hu, Jiarui ^{[1
,2
]}

Liu, Xin ^{[1
,2
]}

Wu, Huanghu ^{[1
,2
]}

Jiang, Yu ^{[1
,2
]}

Xu, Zejun ^{[1
,2
]}

Chen, Sufang ^{[3
]}

Li, Tingcheng ^{[1
,2
]}

Zhang, Junheng ^{[1
,2
]}

Zhang, Daohong ^{[1
,2
]}

机构：

[1] South Cent Minzu Univ, Hubei R&D Ctr Hyperbranched Polymers Synth & Appli, Key Lab Catalysis & Energy Mat Chem, Minist Educ, Wuhan 430074, Peoples R China

[2] South Cent Minzu Univ, Hubei R&D Ctr Hyperbranched Polymers Synth & Appli, Hubei Key Lab Catalysis & Mat Sci, Wuhan 430074, Peoples R China

[3] Wuhan Inst Technol, Sch Chem Engn & Pharm, Key Lab Green Chem Proc,Minist Educ, Hubei Key Lab Novel Reactor & Green Chem Technol, Wuhan 430205, Hubei, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2023年 / 465卷

基金：

中国国家自然科学基金;

关键词：

Hyperbranched polymers; Epoxy resin; Carbon fibers; Composites; Interface; Recycling; CARBON-FIBERS; HIGH-PERFORMANCE; SURFACE MODIFICATION; SHEAR-STRENGTH; VITRIMER; MICROSTRUCTURE; POLYMERIZATION;

D O I：

10.1016/j.cej.2023.142998

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Thermoset epoxy resin/carbon fiber fabric (EP/CF) composites are used increasingly in the fields of automotive, aerospace, and wind power, but the large difficulty in interfacial strengthening and high-value recycling of CF hinders their wide applications in advanced sustainable materials. Here, thiol-terminated hyperbranched polyimides (DSPI-n) were synthesized by a newly designed imide monomer and then were covalently grafted onto the surface of pristine carbon fiber fabric (PCF) by a thiol-ene click reaction to produce thiol-functionalized carbon fiber fabric (TCF). Then, the degradable imide skeleton hyperbranched epoxy resin (DIHE-n) was synthesized from DSPI-n by a click reaction to prepare the DIHE-n/TCF composites. Compared with the DIHE-n/PCF composites, the tensile strength, interlaminar shear strength, and interfacial shear strength of the DIHE-n/TCF composites were distinctly increased, explained by an interfacial strengthening mechanism, being attributed to a synergistic effect of the wide interface layer, strong load transfer capacity of the deformable hyperbranched topological structure, and mechanical interlock of double crosslinked structure. Moreover, the prepared composites can be completely degraded under mild conditions and the carbon fiber fabric can be intactly recycled. This study offers a new approach for the preparation of recyclable and high-performance EP/CF composites.

引用

页数：10

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