文献类型：期刊文献

英文题名：Catalyst-Free Cardanol-Based Epoxy Vitrimers for Self-Healing, Shape Memory, and Recyclable Materials

作者：Zhu, Yu[1,2] Li, Wenbin[1] He, Zhouyu[2] Zhang, Kun[1] Nie, Xiaoan[1] Fu, Renli[2] Chen, Jie[1]

第一作者：Zhu, Yu

通信作者：Chen, J[1];Fu, RL[2]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Key Lab Biomass Energy & Mat, Nanjing 210042, Jiangsu, Peoples R China;[2]Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 210016, Peoples R China

年份：2024

卷号：16

期号：3

外文期刊名：POLYMERS

收录：;EI(收录号：20240715550024);Scopus(收录号：2-s2.0-85184736819);WOS:【SCI-EXPANDED(收录号:WOS:001160143600001)】；

基金：The authors are grateful for the financial support from the Fundamental Research Funds for the Central Non-profit Research Institution of CAF (CAFYBB2022XB001) and the Jiangsu Key Lab of Biomass-based Fuels and Materials (JSBEM-S-202002).

语种：英文

外文关键词：bio-based vitrimers; cardanol; dynamic transesterification; catalyst-free; recyclability

摘要：Bio-based vitrimers present a promising solution to the issues associated with non-renewable and non-recyclable attributes of traditional thermosetting resins, showcasing extensive potential for diverse applications. However, their broader adoption has been hindered by the requirement for catalyst inclusion during the synthesis process. In this study, a cardanol-based curing agent with poly-hydroxy and tertiary amine structures was prepared by a clean synthetic method under the theory of click chemistry. The reaction of a cardanol-based curing agent with diglycidyl ether of bisphenol A formed catalyst-free, self-healing, and recyclable bio-based vitrimers. The poly-hydroxy and tertiary amine structures in the vitrimers promoted the curing of epoxy-carboxylic acid in the cross-linked network and served as internal catalysts of dynamic transesterification. In the absence of catalysts, the vitrimers network can achieve topological network rearrangement through dynamic transesterification, exhibiting excellent reprocessing performance. Moreover, the vitrimers exhibited faster stress relaxation (1500 s at 180 degrees C), lower activation energy (92.29 kJ center dot mol-1) and the tensile strength of the recycled material reached almost 100% of the original sample. This work offers a new method for preparing cardanol-based epoxy vitrimers that be used to make coatings, hydrogels, biomaterials, adhesives, and commodity plastics in the future.