Macromolecular photoinitiators enhance the hydrophilicity and lubricity of natural rubber

ABSTRACT A mild and facile strategy to coat natural rubber (NR) with a hydrophilic coating is described that uses light and photoinitiator copolymers. Five high molecular weight photoinitiator copolymers, composed of hydrophilic (e.g., 2‐hydroxyethyl acrylate [HEA], poly(ethylene glycol) [PEG], N‐vi...

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Bibliographic Details
Published in:Journal of applied polymer science 2016-10, Vol.133 (37), p.np-n/a
Main Authors: Chin, Stacy L., Xiao, Ruiqing, Cooper, Benjamin G., Varongchayakul, Nitinun, Buch, Karen, Kim, Ducksoo, Grinstaff, Mark W.
Format: Article
Language:English
Subjects:
Addition polymerization
biomedical applications
Coating
coatings
Copolymers
Hydrophilicity
Lubricity
Materials science
Molecular weight
Natural rubber
Photoinitiators
photopolymerization
Polymers
radical polymerization
rubber
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Summary:ABSTRACT A mild and facile strategy to coat natural rubber (NR) with a hydrophilic coating is described that uses light and photoinitiator copolymers. Five high molecular weight photoinitiator copolymers, composed of hydrophilic (e.g., 2‐hydroxyethyl acrylate [HEA], poly(ethylene glycol) [PEG], N‐vinylpyrrolidone [NVP], N‐isopropylacrylamide [NIDAM], and acrylic acid [AA]) and hydrophobic benzophenone (BP) units, are synthesized and evaluated for coating NR on UV irradiation. When the HEA/BP, NVP/BP, and AA/BP macromolecular photoinitiators attach to the NR surface, the latter becomes hydrophilic. The resulting hydrophilic coatings on NR sheets are analyzed via FT‐IR spectroscopy, scanning electron microscopy, atomic force microscopy, contact angle measurements, and transwell cytotoxicity assays using NIH 3T3 fibroblast cells. The addition of high molecular weight hydrophilic polymers (e.g., polyvinylpyrrolidone and poly(2‐methacryloyloxyethyl phosphorylcholine)) to the coating further enhances the coating's hydrophilicity and lubricity. The application of these non‐cytotoxic, hydrophilic, and lubricious coatings on NR expands current applications and usage of NR. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43930.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.43930