首页|Recyclable High-performance Carbon Fiber Reinforced Epoxy Composites Based on Dithioacetal Covalent Adaptive Network

Recyclable High-performance Carbon Fiber Reinforced Epoxy Composites Based on Dithioacetal Covalent Adaptive Network

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Recycling of carbon fiber reinforced composites is important for sustainable development and the circular economy.Despite the use of dynamic chemistry,developing high-strength recyclable CFRPs remains a major challenge due to the mutual exclusivity between the dynamic and mechanical properties of materials.Here,we developed a high-strength recyclable epoxy resin(HREP)based on dynamic dithioacetal cova-lent adaptive network using diglycidyl ether bisphenol A(DGEBA),pentaerythritol tetra(3-mercapto-propionate)(PETMP),and vanillin epoxy resin(VEPR).At high temperatures,the exchange reaction of thermally activated dithioacetals accelerated the rearrangement of the network,giv-ing it significant reprocessing ability.Moreover,HREP exhibited excellent solvent resistance due to the increased cross-linking density.Using this high-strength recyclable epoxy resin as the matrix and carbon fiber modified with hyperbranched ionic liquids(HBP-AMIM+PF6-)as the reinforc-ing agent,high performance CFRPs were successfully prepared.The tensile strength,interfacial shear strength(IFSS)and interlaminar shear strength(ILSS)of the optimized formulation(HREP20/CF-HBPPF6)were 1016.1,70.8 and 76.0 MPa,respectively.In addition,the CFRPs demon-strated excellent solvent and acid/alkali-resistance.The CFRPs could completely degrade within 24 h in DMSO at 140 ℃,and the recycled CF still maintained the same tensile strength and ILSS as the original after multiple degradation cycles.

Epoxy resinHyperbranched ionic liquidRecyclingCarbon fiberComposites

Gui-Lian Shi、Ting-Cheng Li、Dao-Hong Zhang、Jun-Heng Zhang

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Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science,Hubei R&D Center of Hyperbranched Polymers Synthesis and Applications,South-Central Minzu University,Wuhan 430074,China

State Key Laboratory of New Textile Materials and Advanced Processing Technologies,Wuhan Textile University,Wuhan 430200,China

Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials,Hubei University,Wuh

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Hubei ProvinceFundamental Research Funds for the Central Universities,South-Central Minzu UniversityFundamental Research Funds for the Central Universities,South-Central Minzu UniversityInnovation Group of National Ethnic Affairs Commission of ChinaFund for Academic Innovation Teams of South-Central Minzu UniversityScientific Research Platforms of South-Central Minzu UniversityOpen Fund for Key Lab of Guangdong High Property and Functional Macromolecular Materials,ChinaState Key Laboratory of New Textile Materials and Advanced Processing Technologies

U23A2069514032422024AFB800CZY23017CZD24001MZR20006XTZ24012PTZ2401320240007FZ20230012

2024

10.1007/s10118-024-3191-8

高分子科学(英文版)
中国化学会　中国科学院化学研究所

高分子科学(英文版)

CSTPCD
影响因子：0.721
ISSN：0256-7679
年,卷(期)：2024.42(10)
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