Lower Critical Solution Temperature-Driven Self-Coacervation of Nonionic Polyester Underwater Adhesives

ACS Nano
Amal NarayananAbraham Joy

Abstract

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 (<300 s) adh...Continue Reading

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Citations

Oct 3, 2020·Small·Qiongyao PengHongbo Zeng
Jun 11, 2021·ACS Applied Materials & Interfaces·Yen-Ming TsengAbraham Joy
Sep 18, 2021·Advanced Materials·Hailong Fan, Jian Ping Gong
Oct 5, 2021·ACS Applied Materials & Interfaces·Qiongyao PengHongbo Zeng
Oct 12, 2021·ACS Applied Materials & Interfaces·Eugene KimFuzhong Zhang
Nov 10, 2021·Chemical Society Reviews·Amal NarayananAbraham Joy

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