Development of LC materials from asymmetric polybenzoxazoles using streptomyces-derived biomolecules

高耐热性生物聚合物的开发是生物塑料领域的一个具有挑战性的课题，对于建立可持续发展的社会至关重要。本研究选择来源于灰色链霉菌的3-氨基-4-羟基苯甲酸（34 AHBA）及其衍生物为起始原料，合成了具有高效诱导高耐热性的苯并恶唑结构的刚性棒聚合物。对34 AHBA的实际氧化衍生物3-氨基-4-羟基苯甲醛（34 AHBAL）进行了改性，制备了一种苯并恶唑（PBO）单体羟胺。最后成功制备了具有高耐热温度的PBO薄膜和液晶功能化PBO。

Development of high-thermoresistance biopolymers is a challenging subject in the field of bioplastics indispensable for establishment of sustainable society. in this study, we selected 3-amino-4-hydroxybanzoic acid (34AHBA) and its derivative which is originated from Streptomyces griceus as a starting material, and synthesized rigid-rod polymers with a benzoxazole structure inducing efficiently to high-thermoresistance. Actually oxidized derivative of 34AHBA, 3-amino-4-hydroxybenzaldehyde (34AHBAL), was modified to prepare a kind of hydroxyamines which is a monomer of polybenzoxazoles (PBO). Finally PBO film with a high-thermoresistance temperature and LC-functional PBO were successfully prepared.