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首页> 外文期刊>Journal of Applied Polymer Science >Preparation and characterization of hydrogel-nanosilver composites based on copolymers from sodium 2-acrylamido-2-methylpropanesulfonate
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Preparation and characterization of hydrogel-nanosilver composites based on copolymers from sodium 2-acrylamido-2-methylpropanesulfonate

机译：基于2-丙烯酰胺基-2-甲基丙烷磺酸钠共聚物的水凝胶-纳米银复合材料的制备与表征

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摘要

Hydrogel-nanosilver composites based on copolymers from sodium 2-acrylamido-2-methylpropanesulfonate (AMPS) were prepared. The silver nanoparticles (AgNPs, or nanosilver) were synthesized in aqueous media using citrate trisodium as stabilizing agent. The hydrogels were obtained by radical copolymerization of the monomers acrylamide (AAm)/AMPS and N- vinylpyrrolidone(VP)/AMPS in the molar ratio [1: 1], using 3 and 6 mol % of N,N-methylene-bis-acrylamide (MBA) as a crosslinking reagent. The distribution of the monomers in both copolymers showed a tendency to moderately alternate because the product of their reactivity ratios was near to zero. The hydrogels were immersed in the colloidal dispersion of AgNPs, which generated hydrogen bonds between the carboxylic acid groups that cover the surface of the AgNPs and the pendant amide groups of the copolymers. The formation of the hydrogen bond was confirmed using solid-state 1H NMR. The hydrogel-nanosilver composites with a lower percentage of MBA retained more silver.
机译：制备了基于2-丙烯酰胺基-2-甲基丙烷磺酸钠（AMPS）共聚物的水凝胶-纳米银复合材料。使用柠檬酸三钠作为稳定剂在水性介质中合成了银纳米颗粒（AgNPs或纳米银）。通过以3：6摩尔％的N，N-亚甲基-双-摩尔比[1：1]摩尔比将单体丙烯酰胺（AAm）/ AMPS和N-乙烯基吡咯烷酮（VP）/ AMPS自由基共聚获得水凝胶。丙烯酰胺（MBA）作为交联剂。两种共聚物中单体的分布均显示出适度交替的趋势，因为它们的反应率之积接近于零。将水凝胶浸入AgNPs的胶体分散液中，该分散液在覆盖AgNPs表面的羧酸基团和共聚物的侧基酰胺基团之间产生氢键。使用固态1 H NMR确认氢键的形成。 MBA含量较低的水凝胶-纳米银复合材料保留了更多的银。

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