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Stereomicrostructure-regulated biodegradable adhesives

Zhen ZhangDepartment of Chemistry, Colorado State University, Fort Collins, CO, USAEthan C. QuinnDepartment of Chemistry, Colorado State University, Fort Collins, CO, USAJacob K. KennyBOTTLE Consortium, Golden, CO, USAAlexandra GrigoropoulosDepartment of Materials Science and Engineering, University of California, Berkeley, Berkeley, CA, USAJason S. DesVeauxBOTTLE Consortium, Golden, CO, USATiffany ChenDepartment of Chemistry, University of California, Berkeley, Berkeley, CA, USALi ZhouDepartment of Chemistry, Colorado State University, Fort Collins, CO, USATing XuDepartment of Chemistry, University of California, Berkeley, Berkeley, CA, USAGregg T. BeckhamBOTTLE Consortium, Golden, CO, USAEugene Y.‐X. ChenDepartment of Chemistry, Colorado State University, Fort Collins, CO, USA

2025en

ABI

Annotatsiya

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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Identifikatorlar

DOI: 10.1126/science.adr7175

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