美国科罗拉多州立大学Eugene Y.-X. Chen研究团队报道了立体微结构调节的可生物降解胶粘剂。相关研究成果于2025年1月17日发表在《科学》。

商用粘合剂是基于石油的热固性网络或不可生物降解的热塑性热熔胶，并使其成为可生物降解替代品的理想替代品。聚（3-羟基丁酸酯）（P3HB）是一种生物可再生和可生物降解的传统塑料替代品，但具有立体完美立体微观结构的微生物P3HB没有粘附性。

该文中，通过阐明化学催化工程P3HB立体微观结构和粘附性能之间的基本关系，发现可生物降解的富含间规的P3HB具有高粘附强度，优于常见的商用粘合剂，而间规、全同立构或富含等规的P3HBs没有可测量的粘附力。

富含合成子的立体微观结构为P3HB带来了所需的热机械和粘弹性性能，使其能够与一系列测试基材（包括铝、钢、玻璃和木材）具有很强的粘附性，其性能对摩尔质量和再加工或再利用不敏感。

附：英文原文

Title: Stereomicrostructure-regulated biodegradable adhesives

Author: Zhen Zhang, Ethan C. Quinn, Jacob K. Kenny, Alexandra Grigoropoulos, Jason S. DesVeaux, Tiffany Chen, Li Zhou, Ting Xu, Gregg T. Beckham, Eugene Y.-X. Chen

Issue&Volume: 2025-01-17

Abstract: Commercial adhesives are petroleum-based thermoset networks or nonbiodegradable thermoplastic hot melts, making them ideal targets for replacement by biodegradable alternatives. Poly(3-hydroxybutyrate) (P3HB) is a biorenewable and biodegradable alternative to conventional plastics, but microbial P3HB, which has a stereoperfect stereomicrostructure, exhibits no adhesion. In this study, by elucidating the fundamental relationship between chemocatalytically engineered P3HB stereomicrostructures and adhesion properties, we found that biodegradable syndio-rich P3HB exhibits high adhesion strength and outperforms common commercial adhesives, whereas syndiotactic, isotactic, or iso-rich P3HB shows no measurable adhesion. The syndio-rich stereomicrostructure brings about desired thermomechanical and viscoelastic properties of P3HB that enable strong adhesion to a range of substrates tested, including aluminum, steel, glass, and wood, and its performance is insensitive to molar mass and reprocessing or reuse.

DOI: adr7175

Source:https://www.science.org/doi/10.1126/science.adr7175