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首页> 外文期刊>Journal of Applied Polymer Science >Enhanced Swelling and Methylene Blue Adsorption of Polyacrylamide-Based Superabsorbents Using Alginate Modified Montmorillonite
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Enhanced Swelling and Methylene Blue Adsorption of Polyacrylamide-Based Superabsorbents Using Alginate Modified Montmorillonite

机译：海藻酸钠改性蒙脱土增强聚丙烯酰胺基超吸收剂的溶胀和亚甲基蓝吸附

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摘要

Polyacrylamide/sodium alginate modified montmorillonite (PAM/SA-MMT) superabsorbent composites were synthesized by free-radical polymerization under normal atmospheric conditions. They were characterized by X-ray diffraction, scanning electron microscopy, and Fourier transform infrared spectroscopy (FTIR). Their water absorbency and methylene blue (MB) adsorption behaviors were studied. Compared with PAM/MMT composites, PAM/SA-MMT composites demonstrated greater water absorbency (863 g g~(-1) in distilled water and 101 g g~(-1) in 0.9 wt % NaCl solution) and higher adsorption capacity of 2639 mg g~(-1) for MB. The adsorption behaviors of the composites showed that the isotherms and adsorption kinetics were in good agreement with the Langmuir equation and pseudo-second-order equation, respectively. FTIR analysis suggested that the MB adsorption of PAM/SA-MMT composites via a mechanism combined electrostatic, H-bonding and hydrophobic interaction.
机译：聚丙烯酰胺/海藻酸钠改性的蒙脱土（PAM / SA-MMT）超吸收性复合材料是在正常大气条件下通过自由基聚合反应合成的。通过X射线衍射，扫描电子显微镜和傅立叶变换红外光谱（FTIR）对它们进行了表征。研究了它们的吸水率和亚甲基蓝（MB）的吸附行为。与PAM / MMT复合材料相比，PAM / SA-MMT复合材料显示出更高的吸水率（蒸馏水863 gg〜（-1），0.9 wt％NaCl溶液吸水101 gg〜（-1））和2639 mg更高的吸附能力g〜（-1）为MB。复合材料的吸附行为表明，等温线和吸附动力学分别与Langmuir方程和拟二阶方程一致。 FTIR分析表明，PAM / SA-MMT复合材料的MB吸附是通过静电，H键和疏水相互作用相结合的机理进行的。

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