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Silver Nanoparticles Loaded Thermoresponsive Hybrid Nanofibrous Hydrogel as a Recyclable Dip‐Catalyst with Temperature‐Tunable Catalytic Activity
Author(s) -
Wang Liying,
Chen Siyuan,
Zhou Jianfeng,
Yang Jianmao,
Chen Xiao,
Ji Yali,
Liu Xiaoyun,
Zha Liusheng
Publication year - 2017
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201700181
Subject(s) - materials science , catalysis , electrospinning , aqueous solution , chemical engineering , stabilizer (aeronautics) , nanoparticle , lower critical solution temperature , swelling , copolymer , reducing agent , spinning , silver nanoparticle , self healing hydrogels , polymer chemistry , nanotechnology , polymer , composite material , chemistry , organic chemistry , mechanical engineering , engineering
Silver nanoparticles (AgNPs) loaded thermoresponsive nanofibrous hydrogel is fabricated by electrospinning the aqueous solution containing the metal nanoparticles and poly(( N ‐isopropylacrylamide)‐co‐( N ‐hydroxymethylacrylamide)) copolymer, followed by heat treatment. To avoid negative effect of the stabilizer or the residual reductant on their performances, the AgNPs of less than 5 nm size are synthesized through reducing Ag + ions in the spinning solution by UV irradiation. The prepared nanofibrous hydrogel with desirable stability in aqueous medium has significant thermoresponsive property, and can reach its swelling or deswelling equilibrium state within 15 s with the medium temperature changing between 25 and 50 °C alternately. The smart nanofibrous hydrogel as a dip‐catalyst has the catalysis for the reduction of 4‐nitrothiophenol to 4‐aminothiophenol by NaBH 4 , and its catalytic activity can be rapidly tuned by temperature. Moreover, it can be facilely recycled from the reaction system at least four times, without any loss of its catalytic activity.