Lower Critical Solution Temperature-Driven Self-Coacervation of Nonionic Polyester Underwater Adhesives
| Autor: | Joshua R Menefee, Qianhui Liu, Amal Narayanan, Abraham Joy, Ali Dhinojwala |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Coacervate Aqueous solution Polymers Polyesters Temperature General Engineering General Physics and Astronomy 02 engineering and technology Adhesion 010402 general chemistry 021001 nanoscience & nanotechnology Smart material 01 natural sciences Lower critical solution temperature Bivalvia 0104 chemical sciences Polyester Chemical engineering Ionic strength Adhesives Animals General Materials Science Adhesive 0210 nano-technology |
| Zdroj: | ACS Nano. 14:8359-8367 |
| ISSN: | 1936-086X 1936-0851 |
| DOI: | 10.1021/acsnano.0c02396 |
| Popis: | To enable attachment to underwater surfaces, aquatic fauna such as mussels and sandcastle worms utilize the advantages of coacervation to deliver concentrated protein-rich adhesive cocktails in an aqueous environment onto underwater surfaces. Recently, a mussel adhesive protein Mfp-3s, was shown to exhibit a coacervation-based adhesion mechanism. Current synthetic strategies to mimic Mfp-3s often involve complexation of oppositely charged polymers. Such complex coacervates are more sensitive to changes in pH and salt, thereby limiting their utility to narrow ranges of pH and ionic strength. In this study, by taking advantage of the lower critical solution temperature-driven coacervation, we have created mussel foot protein-inspired, tropoelastin-like, bioabsorbable, nonionic, self-coacervating polyesters for the delivery of photo-cross-linkable adhesives underwater and to overcome the challenges of adhesion in wet or underwater environments. We describe the rationale for their design and the underwater adhesive properties of these nonionic adhesives. Compared to previously reported coacervate adhesives, these "charge-free" polyesters coacervate in wide ranges of pH (3-12) and ionic strength (0-1 M NaCl) and rapidly ( |
| Databáze: | OpenAIRE |
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