Fully Biobased Vitrimers from Glycyrrhizic Acid and Soybean Oil for Self-Healing, Shape Memory, Weldable, and Recyclable Materials

作者：Jianqiao Wu, Xia Yu, Hao Zhang, Junbo Guo, Jun Hu, Min‐Hui Li · 发表于：ACS Sustainable Chemistry & Engineering · 年份：2020 · DOI：10.1021/acssuschemeng.0c01047 · 被引用次数：245 · 研究领域：Polymer composites and self-healing、Lignin and Wood Chemistry、Oxidative Organic Chemistry Reactions

Vitrimers are covalent polymer networks that can change their topology through thermally activated bond exchange reactions. In this work, fully biobased and recyclable vitrimers were developed from epoxidized soybean oil (ESO) and natural glycyrrhizic acid (GL) as it was without additional chemical modification, which avoided the use of nonrenewable petroleum resources and resolved the disposal problems of materials. Because of the unique rigid skeleton of GL, ESO/GL vitrimers showed good thermal stability and mechanical properties. Driven by the transesterification-induced topological network rearrangements, these ESO/GL vitrimers exhibited high performance of welding, repairing, and shape memory. They were also recyclable and chemically degradable by ethylene glycol. More importantly, these vitrimers could be used as repairable and recyclable adhesives.