Vanillin-Based Polyschiff Vitrimers: Reprocessability and Chemical Recyclability,ACS Sustainable Chemistry & Engineering

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Vanillin-Based Polyschiff Vitrimers: Reprocessability and Chemical Recyclability
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-09-28 00:00:00 , DOI: 10.1021/acssuschemeng.8b03925
Hongwei Geng , Yuli Wang , Qingqing Yu , Shaojin Gu , Yingshan Zhou , Weilin Xu , Xi Zhang ₁ , Dezhan Ye ₁

Affiliation

In this study, dynamic imine covalent bonds were introduced into vanillin-based vitrimers networks, endowing thermosets with hot-reprocessing ability and chemical recyclability under acid hydrolysis. First, dialdehyde monomer, which was synthesized from lignin-derived vanillin monomer, was reacted with conventional amine cross-linkers to form dynamic imine bond networks. Even after three hot-processing cycles, the tensile strength and elongation at break of polyschiff vitrimers could be recovered at least up to 71.2 and 72.8%, respectively, through the imine metathesis reaction. Importantly, the dialdehyde monomers showed enhanced recyclability under strong acid solution and could be reused to regenerate polyschiff vitrimers. These characteristics of reprocessablility, recyclablility, and biobased monomer present a feasible way to satisfy the demands of sustainability.

中文翻译：

基于香兰素的多西芬威猛三聚体：可再加工性和化学可回收性

在这项研究中，将动态亚胺共价键引入基于香草醛的三聚体网络中，赋予热固性树脂以热后处理能力和在酸水解下的化学可循环性。首先，由木质素衍生的香兰素单体合成的二醛单体与常规的胺交联剂反应，形成动态的亚胺键网络。即使经过三个热加工循环，通过亚胺复分解反应，多席夫vitrimers的拉伸强度和断裂伸长率也可以分别至少恢复至71.2和72.8％。重要的是，二醛单体在强酸溶液中显示出增强的可回收性，可以重新用于再生多席夫vitrimers。可再加工性，可回收性，

更新日期：2018-09-28

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