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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and properties of starch-graft-acrylic acid/Na-montmorillonite superabsorbent nanocomposite hydrogels
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Synthesis and properties of starch-graft-acrylic acid/Na-montmorillonite superabsorbent nanocomposite hydrogels

机译：淀粉接枝丙烯酸/钠蒙脱土超吸收纳米复合水凝胶的合成及性能

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摘要

The graft copolymerization of acrylic acid (AA) onto starch was carried out with monomer/starch weight ratio = 1.5. Cerium ammonium nitrate (CAN) and N,N'-methylenebis acrylamide (NMBA) were used as initiator and crosslink agent, respectively. Na-montmorillonite was used as nanoparticles. Starch-graft-acrylic acid/Na-MMT (S-g-AA/MMT) nanocomposite hydrogels were characterized by X-ray diffraction (XRD) and FTIR analysis. The effect of Na-MMT content in nanocomposite hydrogels on the swelling behavior was investigated. Increasing the Na-MMT/monomers ratio up to 1% causes an increment in water absorbency, which indicates that Na-MMT can improve the ability of water absorbency but further increase of Na-MMT causes a decrease in water absorbency. In addition, we describe the removal of safranine T from aqueous solutions using S-g-AA/MMT nanocomposite hydrogels. Effects of various parameters such as treatment time, initial dye concentration, and amount of the Na-MMT were investigated. The Freundlich equations were used to fit the equilibrium isotherms. (C) 2008 Wiley Periodicals, Inc.
机译：丙烯酸（AA）在淀粉上的接枝共聚反应是通过单体/淀粉的重量比= 1.5进行的。硝酸铈铵（CAN）和N，N'-亚甲基双丙烯酰胺（NMBA）分别用作引发剂和交联剂。 Na-蒙脱石用作纳米颗粒。淀粉接枝丙烯酸/ Na-MMT（S-g-AA / MMT）纳米复合水凝胶通过X射线衍射（XRD）和FTIR分析表征。研究了纳米复合水凝胶中Na-MMT含量对溶胀行为的影响。将Na-MMT /单体比率提高至1％会引起吸水率的增加，这表明Na-MMT可以提高吸水率的能力，但进一步增加Na-MMT会导致吸水率的下降。此外，我们描述了使用S-g-AA / MMT纳米复合水凝胶从水溶液中去除藏红花T的方法。研究了各种参数（例如处理时间，初始染料浓度和Na-MMT量）的影响。 Freundlich方程用于拟合平衡等温线。 （C）2008 Wiley期刊公司

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