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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and properties of silver nanoparticles in chitosan-based thermosensitive semi-interpenetrating hydrogels
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Synthesis and properties of silver nanoparticles in chitosan-based thermosensitive semi-interpenetrating hydrogels

机译：壳聚糖基热敏半互穿水凝胶中银纳米粒子的合成与性能

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In this article, thermosensitive poly(N-isopropyl acrylamide-co-vinyl pyrrolidone)/chitosan [P(NIPAM-co-NVP)/CS] semi-interpenetrating (semi-IPN) hydrogels were prepared by redox-polymerization using N,N-methylenebisacrylamide as crosslinker and ammonium persulfate/N,N,N',N'-tetramethylethylenediamine as initiator. Highly stable and uniformly distributed Ag nanoparticles were prepared by using the semihydrogel networks as templates via in situ reduction of silver nitrate in the presence of sodium borohydride as a reducing agent. Introduction of CS improves the hydrogels swelling ratio (SR) and stabilizes the formed Ag nanoparticles in networks. Scanning electron microscopy and transmission electron microscopy revealed that Ag nanoparticles were well dispersed with diameters of 10 nm. The semi-IPN hydrogel/Ag composites had higher SR and thermal stability than its corresponding semi-IPN hydrogels.
机译：在本文中，通过使用N，N进行氧化还原聚合制备了热敏性聚（N-异丙基丙烯酰胺-共乙烯基吡咯烷酮）/壳聚糖[P（NIPAM-co-NVP）/ CS]半互穿（半IPN）水凝胶。 -亚甲基双丙烯酰胺作为交联剂，过硫酸铵/ N，N，N'，N'-四甲基乙二胺作为引发剂。通过使用半水凝胶网络作为模板，通过在硼氢化钠作为还原剂的存在下原位还原硝酸银来制备高度稳定且均匀分布的Ag纳米颗粒。 CS的引入提高了水凝胶的溶胀率（SR），并稳定了网络中形成的Ag纳米颗粒。扫描电子显微镜和透射电子显微镜显示Ag纳米颗粒分散良好，直径为10nm。半IPN水凝胶/银复合材料比其相应的半IPN水凝胶具有更高的SR和热稳定性。

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