Title
Rapidly responsive smart adhesive-coated micropillars utilizing catechol–boronate complexation chemistry
Document Type
Article
Publication Date
6-14-2019
Abstract
Smart adhesive hydrogels containing 10 mol% each of dopamine methacrylamide (DMA) and 3-acrylamido phenylboronic acid (APBA) were polymerized in situ onto polydimethylsiloxane (PMDS) micropillars with different aspect ratios (AR = 0.4, 1 and 2). Using Johnson–Kendall–Roberts (JKR) contact mechanics tests, the adhesive-coated pillars demonstrated strong wet adhesion at pH 3 (Wadh = 420 mJ m−2) and can be repeatedly deactivated and reactivated by changing the pH value (pH 9 and 3, respectively). When compared to the bulk adhesive hydrogel of the same composition, the adhesive-coated pillars exhibited a significantly faster rate of transition (1 min) between strong and weak adhesion. This was attributed to an increased surface area to volume ratio of the adhesive hydrogel-coated pillars, which permitted rapid diffusion of ions into the adhesive matrix to form or break the catechol–boronate complex.
Publication Title
Soft Matter
Recommended Citation
Narkar, A. R.,
Kendrick, C. E.,
Bellur, K.,
Leftwich, T.,
Zhang, Z.,
&
Lee, B.
(2019).
Rapidly responsive smart adhesive-coated micropillars utilizing catechol–boronate complexation chemistry.
Soft Matter,
15, 5474-5482.
http://doi.org/10.1039/C9SM00649D
Retrieved from: https://digitalcommons.mtu.edu/biomedical-fp/56
Publisher's Statement
© The Royal Society of Chemistry 2019. Publisher’s version of record: https://doi.org/10.1039/C9SM00649D