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首页> 外文期刊>Journal of Applied Polymer Science >Radiation synthesis and characterization of 2-hydroxyethyl-methacrylate-based hydrogels containing Di- and Tri-protic acid and its application on wastewater treatment
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Radiation synthesis and characterization of 2-hydroxyethyl-methacrylate-based hydrogels containing Di- and Tri-protic acid and its application on wastewater treatment

机译：含二和三质子酸的甲基丙烯酸2-羟乙酯基水凝胶的辐射合成，表征及其在废水处理中的应用

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摘要

Radiation-crosslinked 2-hydroxyethylmethacrylate/citric acid (HEMA/CAc), 2-hydroxyethylmethacrylate/tartaric acid (HEMA/TA), and 2-hydroxyethylmethacrylate/succinic acid (HEMA/Sc) copolymers were prepared by using Co-60 gamma-rays. The gel fraction yield and the swelling behavior of the prepared hydrogels were studied. It was shown that increasing irradiation doses was accompanied by an increase in yield of gel fraction and a decrease in swelling degree. The parameters of equilibrium swelling, maximum swelling, initial swelling rate, swelling exponent, and diffusion coefficient of the hydrogels were determined by studying the swelling behavior of the hydrogels prepared. It was seen that the equilibrium swelling degree increases as the content of acid increases, as a result of introducing more hydrophilic groups. When the hydrophilic polymer (acids) varies in the content range 40-80 mg, swelling exponents (n) decreases, thereby indicating a shift in the water-transport mechanism from the anomalous (non-Fickian)-type to the Fickian-type. Characterization and some selected properties of the prepared hydrogels were studied, and accordingly the possibility of its practical use in the treatment of industrial wastes such as dyes and heavy metals (Fe, Ni, Co, and Cu) were also studied. The effect of treatment time, pH of feed solution, initial feed concentration, and temperature on the dye and heavy metals uptake was determined. The uptake order for a given metal was HEMA/TA hydrogel > HEMA/CAc > HEMA/Sc hydrogel. (c) 2007 Wiley Periodicals, Inc.
机译：使用Co-60γ射线制备了辐射交联的甲基丙烯酸2-羟乙酯/柠檬酸（HEMA / CAc），甲基丙烯酸2-羟乙酯/酒石酸（HEMA / TA）和甲基丙烯酸2-羟乙酯/琥珀酸（HEMA / Sc）共聚物。研究了制备的水凝胶的凝胶分数收率和溶胀行为。结果表明，随着辐照剂量的增加，凝胶级分的产率提高，溶胀度降低。通过研究所制备的水凝胶的溶胀行为，确定水凝胶的平衡溶胀，最大溶胀，初始溶胀速率，溶胀指数和扩散系数的参数。可以看出，由于引入更多的亲水基团，平衡溶胀度随酸含量的增加而增加。当亲水性聚合物（酸）的含量范围在40-80 mg之间变化时，溶胀指数（n）降低，从而表明输水机理已从异常（非菲克）型转变为菲克型。研究了制备的水凝胶的特性和某些选定的性能，因此，还研究了其在工业废料如染料和重金属（铁，镍，钴和铜）中的实际应用可能性。确定了处理时间，进料溶液的pH，初始进料浓度和温度对染料和重金属吸收的影响。给定金属的吸收顺序为HEMA / TA水凝胶> HEMA / CAc> HEMA / Sc水凝胶。 （c）2007年Wiley Periodicals，Inc.

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