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

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

doi:10.1007/s10118-024-3191-8

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

RESEARCH ARTICLE | Updated：2024-09-23

- 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
- 高分子科学（英文版） 2024年42卷第10期页码：1514-1524
- Affiliations：
  
  a.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
  b.State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China
  c.Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan 430062, China
- Author bio：
  
  wunderfool@126.com (T.C.L.)
  mcjhzhang@gmail.com (J.H.Z.)
- Funds：
  
  This work was financially supported by the National Natural Science Foundation of China (Nos. U23A2069 and 51403242), the Natural Science Foundation of Hubei Province (No. 2024AFB800), the Fundamental Research Funds for the Central Universities, South-Central Minzu University (Nos. CZY23017 and CZD24001), the Innovation Group of National Ethnic Affairs Commission of China (No. MZR20006), the Fund for Academic Innovation Teams of South-Central Minzu University (No. XTZ24012), Scientific Research Platforms of South-Central Minzu University (No. PTZ24013), the Open Fund for Key Lab of Guangdong High Property and Functional Macromolecular Materials, China (No. 20240007) and State Key Laboratory of New Textile Materials and Advanced Processing Technologies (No. FZ20230012).;Electronic supplementary information (ESI) is available free of charge in the online version of this article at http://doi.org/10.1007/s10118-024-3191-8.
- DOI：10.1007/s10118-024-3191-8
  中图分类号：
- 纸质出版日期：2024-10-01，
  
  网络出版日期：2024-08-27，
  
  收稿日期：2024-04-30，
  
  修回日期：2024-06-10，
  
  录用日期：2024-06-12
- Accepted：
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Shi, G. L.; Li, T. C.; Zhang, D. H.; Zhang, J. H. Recyclable high-performance carbon fiber reinforced epoxy composites based on dithioacetal covalent adaptive network. Chinese J. Polym. Sci. 2024, 42, 1514–1524

Gui-Lian Shi, Ting-Cheng Li, Dao-Hong Zhang, et al. Recyclable High-performance Carbon Fiber Reinforced Epoxy Composites Based on Dithioacetal Covalent Adaptive Network[J]. Chinese Journal of Polymer Science, 2024,42(10):1514-1524.
Shi, G. L.; Li, T. C.; Zhang, D. H.; Zhang, J. H. Recyclable high-performance carbon fiber reinforced epoxy composites based on dithioacetal covalent adaptive network. Chinese J. Polym. Sci. 2024, 42, 1514–1524 DOI： 10.1007/s10118-024-3191-8.

Gui-Lian Shi, Ting-Cheng Li, Dao-Hong Zhang, et al. Recyclable High-performance Carbon Fiber Reinforced Epoxy Composites Based on Dithioacetal Covalent Adaptive Network[J]. Chinese Journal of Polymer Science, 2024,42(10):1514-1524. DOI： 10.1007/s10118-024-3191-8.

摘要

We develop a green and sustainable strategy toward closing the loop on carbon fiber reinforced epoxy composites recycling via dynamic dithioacetals. This work presents a pivotal step for sustainable management of end-of-life carbon fiber reinforced epoxy composites

paving the way to a circular economy.

Abstract

Recycling of carbon fiber reinforced composites is important for sustainable development and the circular economy. Despite the use of dyn

amic 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 covalent 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

giving 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

−

) as the reinforcing 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-HBPPF

) were 1016.1

70.8 and 76.0 MPa

respectively. In addition

the CFRPs demonstrated excellent solvent and acid/alkali-resistance. The CFRPs could completely degrade within 24 h in DMSO at 140 °C

and the recycled CF still maintained the same tensile strength and ILSS as the original after multiple degradation cycles.

关键词

Keywords

Epoxy resinHyperbranched ionic liquidRecyclingCarbon fiberComposites

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