环氧化大豆油
催化作用
环氧树脂
有机化学
化学
马来酸酐
溶剂
大豆油
材料科学
极限抗拉强度
糖
化学工程
复合材料
聚合物
原材料
共聚物
工程类
食品科学
作者
Jie Li,Benzhi Ju,Shufen Zhang
标识
DOI:10.1016/j.indcrop.2023.117466
摘要
Vitrimers based on dynamic transesterification (DTE) are usually thought to highly rely the use of catalysts, for example, Lewis acids and tertiary amines to promote the bond exchange reaction, which bring additional concerns on human health and the environment. Herein, we report a family of fully bio-based epoxy vitrimers that rearrange their topologies via DTE in the absence of any catalyst. Specifically, epoxidized soybean oil (ESO) was efficiently cured by conjugated carboxylic groups formed in-situ through the ring-opening of maleic anhydride (MA) by sugar alcohols (SAs) in a one-pot and solvent-free manner to produce these vitrimers. Abundant -OH groups from SAs strongly enhanced mechanical properties the without hindering stress relaxation or re-processing of the vitrimers. Meanwhile, welding, crack-healing and shape editing at high temperatures was achieved. The vitrimer samples exhibited various recovery rates of tensile strength upon 3 times of mechanical recycling.
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