Significant Performance Enhancement of Polymer Resins by Bioinspired Dynamic Bonding.

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Advanced materials (Deerfield Beach, Fla.), ISSN: 1521-4095, Vol: 29, Issue: 39

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Seo, Sungbaek; Lee, Dong Woog; Ahn, Jin Soo; Cunha, Keila; Filippidi, Emmanouela; Ju, Sung Won; Shin, Eeseul; Kim, Byeong-Su; Levine, Zachary A.; Lins, Roberto D.; Israelachvili, Jacob N.; Waite, J. Herbert; Valentine, Megan T.; Shea, Joan Emma; Ahn, B. Kollbe Show More Hide
Wiley-Blackwell; WILEY-V C H VERLAG GMBH
Materials Science; Engineering; adhesion; dynamic bonding; mussels; primer; surfaces
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Marine mussels use catechol-rich interfacial mussel foot proteins (mfps) as primers that attach to mineral surfaces via hydrogen, metal coordination, electrostatic, ionic, or hydrophobic bonds, creating a secondary surface that promotes bonding to the bulk mfps. Inspired by this biological adhesive primer, it is shown that a ≈1 nm thick catecholic single-molecule priming layer increases the adhesion strength of crosslinked polymethacrylate resin on mineral surfaces by up to an order of magnitude when compared with conventional primers such as noncatecholic silane- and phosphate-based grafts. Molecular dynamics simulations confirm that catechol groups anchor to a variety of mineral surfaces and shed light on the binding mode of each molecule. Here, a ≈50% toughness enhancement is achieved in a stiff load-bearing polymer network, demonstrating the utility of mussel-inspired bonding for processing a wide range of polymeric interfaces, including structural, load-bearing materials.