Stereomicrostructure-regulated biodegradable adhesives

• 成果类型: Article
• 署名作者: Zhang, Zhen; Quinn, Ethan C.; Kenny, Jacob K.; Grigoropoulos, Alexandra; DesVeaux, Jason S.; Chen, Tiffany; Zhou, Li; Xu, Ting; Beckham, Gregg T.; Chen, Eugene Y. -X.
• 署名单位: Colorado State University System; Colorado State University Fort Collins; United States Department of Energy (DOE); National Renewable Energy Laboratory - USA; University of California System; University of California Berkeley; University of California System; University of California Berkeley; United States Department of Energy (DOE); Lawrence Berkeley National Laboratory; South China University of Technology
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-13034
• DOI: 10.1126/science.adr7175
• 发表日期: 2025-01-17
• 页码: 297-303
• 关键词: ring-opening polymerization; beta-lactones; propylene; polyhydroxyalkanoates; toughness; catalysts; polymers; methanol; ECONOMY

摘要

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.