Chemistry and Physics Faculty Articles

Title

Engineering the Surface Properties of Poly(dimethylsiloxane) Utilizing Aqueous RAFT Photografting of Acrylate/Methacrylate Monomers

Document Type

Article

Publication Date

1-8-2018

Publication Title

Macromolecules

ISSN

0024-9297

Volume

51

Issue/No.

2

First Page

306

Last Page

317

Abstract

Polymeric surface grafting offers a tunable way to control the interfacial interactions between a material’s surface and its environment. The ability to tailor the surface properties of poly(dimethylsiloxane) elastomer (PDMSe) substrates with functional chemistry, wettability, and roughness can enhance the fields of biofouling, microfluidics, and medical implants. We developed a reversible addition–fragmentation chain transfer (RAFT) polymerization technique to synthesize a host of copolymers composed of acrylamide, acrylic acid, hydroxyethyl methacrylate, and (3-acrylamidopropyl)trimethylammonium chloride with targetable molecular weight from ∼5 to 80 kg/mol and low dispersity of Đ ≤ 1.13. This RAFT strategy was used in conjunction with photografting to chemically engineer the surface of PDMSe with hydrophilic, hydrophobic, and anionic groups. Varying grafting time and copolymer composition allowed for targetable molecular weight, chemical functionality, and water contact angles ranging from 112° to 14°. These new material surfaces will be evaluated for their antifouling and fouling release potential.

Comments

Supporting Information

The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acs.macromol.7b02575.

FTIR and 13C NMR spectra of CMP, FTIR spectra and peak fitting of acrylate/methacrylate homopolymers/copolymers, maximum FTIR carbonyl absorbance ratios, 1H NMR spectra of respective homopolymers/copolymers, composition % versus conversion, PDMSe monomer mass uptake, FTIR spectra of grafted PDMSe versus treatment time, data showing the grafted "sharktooth" morphology, and FTIR spectra of Na+ conjugated copolymers (PDF)

Additional Comments

Copyright © 2018 © 2018 American Chemical Society

ORCID ID

0000-0002-7836-7262

DOI

10.1021/acs.macromol.7b02575

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