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Polymers 2015, 7(5), 909-920; doi:10.3390/polym7050909

Synthesis and Thermosensitive Behavior of Polyacrylamide Copolymers and Their Applications in Smart Textiles

Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Hangzhou 310018, Zhejiang, China
Eco-Dyeing and Finishing Engineering Research Center, Ministry of Education, Hangzhou 310018, Zhejiang, China
National Base for International Science and Technology Cooperation in Textiles and Consumer-Goods Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, Zhejiang, China
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Academic Editor: Wei Min Huang
Received: 7 January 2015 / Revised: 20 April 2015 / Accepted: 27 April 2015 / Published: 6 May 2015
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We tuned the lower critical solution temperature (LCST) of amphiphilic poly(N-isopropylacrylamide) (PNIPAAm) via copolymerization with a hydrophilic comonomer of N-hydroxymethyl acrylamide (NHMAAm). A series of copolymers P(NIPAAm-co-NHMAAm) were synthesized by atom transfer radical polymerization (ATRP) using CuBr/(N,N,N',N',N''-Pentamethyldiethylenetriamine) (PMDETA) as a catalyst system and 2-bromo ethyl isobutyrate (EBiB) as an initiator. The copolymers were well characterized by Fourier transform infrared spectroscopy (FT-IR), 1H Nuclear magnetic resonance (NMR), and Thermogravimetric analysis (TGA). The copolymers followed a simple rule in their thermosensitive behaviors and have a linear increase in the LCST as a function of NHMAAm mol%. The thermosensitive properties of the copolymer films were investigated and demonstrated hydrophilic-hydrophobic transitions. Finally, the copolymer was grafted onto cotton fabrics using citric acid (CA) as a crosslinking agent and sodium hypophosphite (SHP) as a catalyst following a two dipping, two padding process. The large number of hydroxyl groups in the copolymer makes grafting convenient and firm. The grafted cotton fabrics show obvious thermosensitive behaviors. The results demonstrate that the cotton fabrics become more hydrophobic when the temperature is higher than the LCST. This study presents a valuable route towards temperature-responsive smart textiles and their potential applications. View Full-Text
Keywords: synthesis; thermosensitive behavior; copolymer; tunable LCST; smart textile synthesis; thermosensitive behavior; copolymer; tunable LCST; smart textile

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MDPI and ACS Style

Chen, T.; Fang, Q.; Zhong, Q.; Chen, Y.; Wang, J. Synthesis and Thermosensitive Behavior of Polyacrylamide Copolymers and Their Applications in Smart Textiles. Polymers 2015, 7, 909-920.

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