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Stereomicrostructure-regulated biodegradable adhesives

作   者:
Zhen ZhangEthan C. QuinnJacob K. KennyAlexandra GrigoropoulosJason S. DesVeauxTiffany ChenLi ZhouTing XuGregg T. BeckhamEugene Y.-X. Chen
作者机构:
USA||Materials Science Division Fort Collins Lawrence Berkeley National Laboratory CO Colorado State UniversitySouth China Advanced Institute for Soft Matter Science and Technology Berkeley University of CaliforniaRenewable Resources and Enabling Sciences CenterDepartment of Materials Science and Engineering USA||Department of Chemistry USA South China University of TechnologyDepartment of Chemistry USA||BOTTLE Consortium Guangzhou School of Emergent Soft Matter China USA||Kavli Energy NanoScience Institute National Renewable Energy Laboratory Golden CA
期刊名称:
Science
i s s n:
0036-8075
年卷期:
2025 年 387 卷 Jan.17 TN.6731 期
页   码:
297-303
页   码:
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.
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