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首页> 外文期刊>Polymers for advanced technologies >β-Cyclodextrin hydrogel incorporating hydrophobically modified poly(N-isopropylacrylamide) for a temperature-dependent release
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β-Cyclodextrin hydrogel incorporating hydrophobically modified poly(N-isopropylacrylamide) for a temperature-dependent release

机译：β-环糊精水凝胶结合了疏水改性的聚（N-异丙基丙烯酰胺），可随温度释放

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Hydrogels exhibiting a temperature-dependent release were prepared by incorporating hydrophobically modified poly(N-isopropylacrylamide) (HmPNIPAM) into β-cyclodextrin hydrogels (β-CD hydrogels). The specific loading of HmPNIPAM was about 0.0069 g HmPNIPAM/g β-CD hydrogels. The incorporation of the polymer was qualitatively conformed by FT-IR spectroscopy and SEM. The percent release of blue dextran in 24 hr at 20℃ (about 77%) was markedly higher than those obtained at 35℃ and 45℃ (about 53 and 55%, respectively). At the higher temperatures, the volume of the hydrogel could decrease upon the thermal contraction of HmPNIPAM, leading to a smaller mesh and a suppressed release. In fact, the swelling ratio in 24 hr at 35℃ and 45℃ (about 396% and 405%, respectively) was obviously lower than that obtained at 20℃ (about 465%).
机译：通过将疏水改性的聚（N-异丙基丙烯酰胺）（HmPNIPAM）掺入β-环糊精水凝胶（β-CD水凝胶）中，制备出具有温度依赖性释放的水凝胶。 HmPNIPAM的比负载约为0.0069 g HmPNIPAM / gβ-CD水凝胶。通过FT-IR光谱和SEM定性地证实聚合物的掺入。蓝色葡聚糖在20℃24小时内的释放百分比（约77％）显着高于35℃和45℃下的释放百分比（分别约53和55％）。在较高的温度下，水凝胶的体积会因HmPNIPAM的热收缩而减少，从而导致网孔更小且释放受到抑制。实际上，在35℃和45℃时24小时的溶胀率（分别约为396％和405％）明显低于在20℃时的溶胀率（约465％）。

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