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首页> 外文期刊>Journal of Applied Polymer Science >Chitosan Modified MMT-Poly(AMPS) Nanocomposite Hydrogel: Heating Effect on Swelling and Rheological Behavior
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Chitosan Modified MMT-Poly(AMPS) Nanocomposite Hydrogel: Heating Effect on Swelling and Rheological Behavior

机译：壳聚糖修饰的MMT-Poly（AMPS）纳米复合水凝胶：加热对溶胀和流变行为的影响

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摘要

Vulnerability of hydrogels against thermal circumstances may be substantially eliminated via incorporating nanoclay to prepare nanocomposite hydrogels. In this research, chitosan-intercalated montmorillonite (ChitoMMT) was used as a bionanoclay to yield novel nanocomposite hydrogels based on 2-acrylamido-2-methylpropanesulfonic acid. The bionanoclay is suitable especially for preparing biomaterials used in biomedical, food, and pharmaceutical applications, unlike conventional commercial nanoclays (alkyl ammonium-intercalated MMT) which are not appropriate for bio-applications due to toxicity of the intercalant particularly where the clay content is high. Two different crosslinkers (i.e., methylene bisacrylamide, and polyethyleneglycol dimethacrylate) were employed to synthesize the nanocomposites. The variations in swelling, rheological and thermal properties of the hydrogels were essentially attributed to thermally induced crosslink cleavage/formation depending upon the crosslinker nature. The nanocomposites comprised superior thermal properties in comparison with the clay-free hydrogel counterpart. They can preserve substantially their swelling ability for longer heating periods.
机译：通过掺入纳米粘土以制备纳米复合水凝胶，可以基本上消除水凝胶对热环境的脆弱性。在这项研究中，壳聚糖插层的蒙脱石（ChitoMMT）被用作生物纳米粘土，以产生基于2-丙烯酰胺基-2-甲基丙烷磺酸的新型纳米复合水凝胶。生物纳米粘土特别适合于制备用于生物医学，食品和制药应用的生物材料，这与常规的商用纳米粘土（烷基铵插层的MMT）不同，传统的纳米粘土由于嵌入剂的毒性而不适用于生物应用，特别是在粘土含量高的情况下。两种不同的交联剂（即亚甲基双丙烯酰胺和聚乙二醇二甲基丙烯酸酯）被用来合成纳米复合材料。取决于交联剂的性质，水凝胶的溶胀，流变性和热性质的变化基本上归因于热诱导的交联裂解/形成。与不含粘土的水凝胶对应物相比，纳米复合材料具有优异的热性能。它们可以在更长的加热时间内基本保持其膨胀能力。

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