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Title: Polymer coupling via hetero-disulfide exchange and its applications to rewritable polymer brushes
Authors: Sim, Xuan Ming
Chen, Chen
Goto, Atsushi
Keywords: Science::Chemistry::Organic chemistry::Polymers
Issue Date: 2021
Source: Sim, X. M., Chen, C. & Goto, A. (2021). Polymer coupling via hetero-disulfide exchange and its applications to rewritable polymer brushes. ACS Applied Materials & Interfaces, 13(20), 24183-24193.
Project: NRF-NRFI05-2019-0001
Journal: ACS Applied Materials & Interfaces
Abstract: An iodide-terminated polymer (Polymer-I) is converted to a thiol-terminated polymer (Polymer-SH) using HSCH2CH2SH in a remarkably short time (10 min). Polymer-SH is further converted to a pyridyl disulfide-terminated polymer (Polymer-SS-Py). The hetero-coupling of Polymer-SH and Polymer-SS-Py is successfully achieved to quantitatively generate a polymer disulfide (Polymer-SS-Polymer). Exploiting this efficient hetero-coupling technique, Polymer-SH is attached (grafted) on a Py-SS-immobilized surface to generate a polymer brush via a disulfide (-SS-) linkage (writing process). The -SS- linkage is cleaved by the treatment with dithiothreitol (DTT) to detach the polymer from the surface (erasing process). Subsequently, another Polymer-SH is attached on the surface to generate another polymer brush (rewriting process). Thus, a writable, erasable, and rewritable polymer brush surface is achieved. Hydrophilic, hydrophobic, and super-hydrophobic polymers (Polymer-SH) are attached on the surface, tailoring the surface wettability in the writing-erasing-rewriting cycles. Polymer-SH is also attached on a chain-end Py-SS-functionalized polymer brush surface, generating a rewritable block copolymer brush surface. A patterned block copolymer brush surface is also obtained using photo-irradiation and a photo-mask in the erasing process. The metal-free synthetic procedure, accessibility to patterned brushes, and switchable surface properties via the writing-erasing-rewriting process are attractive features of the present approach.
ISSN: 1944-8244
DOI: 10.1021/acsami.1c07195
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: embargo_20220603
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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