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首页> 外文期刊>Journal of Applied Polymer Science >Enhanced swelling properties of a novel sodium alginate-based superabsorbent composites: NaAlg-g-poly(NaA-co-St)/APT
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Enhanced swelling properties of a novel sodium alginate-based superabsorbent composites: NaAlg-g-poly(NaA-co-St)/APT

机译：新型藻酸钠基超吸收性复合材料的溶胀性能增强：NaAlg-g-poly（NaA-co-St）/ APT

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摘要

A novel alginate-based superabsorbent composite with enhanced swelling properties was synthesized by simultaneously grafted copolymerization partially neutralized acrylic acid (NaA), styrene (St) onto the sodium alginate (NaAlg) backbones in the presence of attapulgite (APT). The structure and morphology of the synthesized superabsorbent composites were characterized by Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible (UV-vis) spectra and Field emission scanning electron microscope (FESEM). Major factors affecting the swelling ratio according to Flory's theory were discussed. The superabsorbent composite synthesized under optimum reaction conditions exhibits the maximum swelling ratio of 587 g/g in distilled water and 73 g/g in 0.9 wt % NaCl solution. Compared with NaAlg-g-PNaA hydrogel, the simultaneous introduction of tiny amount of St and APT not only enhanced the swelling ratio but also increased the initial swelling rate. In addition, the effects of salt and pH medium on the swelling behaviors were investigated, and the results indicated that the composite showed smart swelling behavior in multivalent salt solution and better pH-responsitivity in the pH 2.2 and 7.4 solutions, which makes it promising for drug delivery application.
机译：通过在凹凸棒石（APT）存在下将部分中和的丙烯酸（NaA），苯乙烯（St）同时接枝共聚到藻酸钠（NaAlg）骨架上，合成了一种新型的具有增强溶胀性能的藻酸盐基超吸收性复合材料。利用傅立叶变换红外光谱（FTIR），紫外可见光谱（UV-vis）和场发射扫描电子显微镜（FESEM）对合成的高吸收性复合材料的结构和形貌进行了表征。根据Flory理论，讨论了影响溶胀率的主要因素。在最佳反应条件下合成的超吸收性复合材料在蒸馏水中的最大溶胀率为587 g / g，在0.9 wt％的NaCl溶液中的溶胀率为73 g / g。与NaAlg-g-PNaA水凝胶相比，同时引入少量的St和APT不仅增加了溶胀率，而且增加了初始溶胀率。此外，研究了盐和pH介质对溶胀行为的影响，结果表明该复合材料在多价盐溶液中表现出灵敏的溶胀行为，在pH 2.2和7.4溶液中表现出更好的pH响应性，使其具有广阔的应用前景。药物输送应用。

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