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Switchable Wettability of Poly(NIPAAm- co -HEMA- co -NMA) Coated PET Fabric for Moisture Management

Authors
  • Chaudhuri, Shamik
  • Wu, Chang-Mou1
  • 1 Research and Development Center for Smart Textile Technology, National Taipei University of Technology, Taipei 10608, Taiwan
Type
Published Article
Journal
Polymers
Publisher
MDPI AG
Publication Date
Jan 04, 2020
Volume
12
Issue
1
Identifiers
DOI: 10.3390/polym12010100
PMID: 31947945
PMCID: PMC7023078
Source
PubMed Central
Keywords
License
Green

Abstract

In this study, we synthesized a random poly[( N -isopropylacrylamide)- co -(2-hydroxyethylmethacrylate)- co -( N -methylolacrylamide)] [poly(NIPAAm- co -HEMA- co -NMA)] copolymer through free-radical polymerization. The NIPAAm, HEMA and NMA moieties were framed to provide thermoresponsiveness, water absorption and retention control, and chemical cross-linking to achieve stability in aqueous medium, respectively. The copolymer showed a significant change in optical transmittance with a variation in temperature due to the change in volume (i.e., hydrophilic/hydrophobic) between 25 °C and 40 °C, attributed to the lower critical solution temperature property of the NIPAAm moiety. The copolymers were wire-bar-coated onto polyethylene terephthalate (PET) fabric. Variation in the water contact angle affirmed the switchable wettability due to the change in temperature. We tested the coated fabrics for moisture absorption and release at different temperatures. The results at 20 °C and 37 °C indicated that the P2 copolymer had the highest moisture absorption and release capability. Therefore, the copolymers with tailored properties can be used as smart textiles for activity specific clothing.

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