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首页> 外文期刊>Journal of Materials Science >Preparation and characterization of hydrophobically modified polyacrylamide hydrogels by grafting glycidyl methacrylate
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Preparation and characterization of hydrophobically modified polyacrylamide hydrogels by grafting glycidyl methacrylate

机译:接枝甲基丙烯酸缩水甘油酯制备疏水改性聚丙烯酰胺水凝胶及其表征

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摘要

A modified polyacrylamide (PAM-g-GMA) has been prepared by ring-opening reaction of glycidyl methacrylate (GMA) monomer grafted onto the COO-groups of partially hydrolytic polyacrylamide (PAM) chain. The modified polyacrylamide hydrogels were obtained via a free radical polymerization of PAM-g-GMA without adding any a crosslinker using potassium persulfate (KPS), as initiator, and triethanolamine (TEA), as a coupling agent in aqueous solution. The molecular structure of PAM-g-GMA was characterized by FT-IR, H-1-NMR, and the thermal behaviors of hydrogels were studied by DSC. Furthermore, the swelling property and compressive properties of PAM-g-GMA hydrogels were investigated. The results show that the modified polyacrylamide hydrogels exhibit a remarkable hydration-dehydration change in response to pH in aqueous media and also undergo dramatic increase in volume with increasing temperature. So the modified polyacrylamide hydrogels will have promising and wide applications such as pharmaceutical use, water retention, electrophoretic media and so on.
机译:通过接枝到部分水解聚丙烯酰胺(PAM)链的COO基团上的甲基丙烯酸缩水甘油酯(GMA)单体的开环反应,制备了改性聚丙烯酰胺(PAM-g-GMA)。改性聚丙烯酰胺水凝胶是通过PAM-g-GMA的自由基聚合而获得的,无需使用过硫酸钾(KPS)作为引发剂和三乙醇胺(TEA)作为偶联剂在水溶液中添加任何交联剂。通过FT-IR,H-1-NMR表征了PAM-g-GMA的分子结构,并通过DSC研究了水凝胶的热行为。此外,研究了PAM-g-GMA水凝胶的溶胀性质和压缩性质。结果表明,改性聚丙烯酰胺水凝胶响应于水性介质中的pH值表现出显着的水合-脱水变化,并且随着温度的升高其体积也急剧增加。因此,改性聚丙烯酰胺水凝胶将具有广阔的应用前景,如制药,保水,电泳介质等。

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