Several kinds of acrylamide-poly(ethylene glycol) hydrogels were synthesized at room temperature (25°C) by adding N,N,N’,N’-tetramethylethylenediamine crosslinker to AAm aqueous solutions containing 0, 0.20, 0.40, 0.60, 0.80 and 1 mg of PEG6000. Water uptake and dye-sorption properties of the synthesized poly(acrylamide) and acrylamide-poly(ethylene glycol) hydrogels were investigated as a function of chemical composition of the hydrogels. Cationic dye (methylene blue) has been used in sorption studies. It was determined that poly(ethylene glycol) used for pore forming in synthesizing the hydrogel has an influence on the adsorption of methylene blue as in the case of adsorption phonemia. Adsorption equilibrium was investigated by using Langmuir and Freundlich isotherm models. Two kinetic models, (i) pseudo-first-order and (ii) pseudo-second-order kinetic models were applied to test the experimental data. Freundlich isotherm model represented the experimental data very well. Methylene blue adsorption followed the pseudo-second-order kinetic model which indicated chemical adsorption.

中文翻译：

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基于丙烯酰胺的水凝胶可溶胀和吸收水溶液中的亚甲蓝

在室温（25°C）下，通过将N，N，N'，N'-四甲基乙二胺交联剂添加到含有0、0.20、0.40、0.60、0.80和0.80的Aam水溶液中，合成了几种丙烯酰胺-聚乙二醇水凝胶。 1毫克的PEG6000 研究了合成的聚丙烯酰胺和丙烯酰胺-聚乙二醇水凝胶的吸水率和染料吸附性能，作为水凝胶化学组成的函数。阳离子染料（亚甲基蓝）已用于吸附研究。可以确定，在合成水凝胶时，用于成孔的聚乙二醇对亚甲基蓝的吸附有影响，如吸附音素的情况一样。使用Langmuir和Freundlich等温线模型研究吸附平衡。两种动力学模型 （i）伪一阶和（ii）伪二阶动力学模型用于测试实验数据。Freundlich等温线模型很好地代表了实验数据。亚甲基蓝的吸附遵循伪二级动力学模型，该模型表明了化学吸附。