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首页> 外文期刊>International Journal of Biological Macromolecules: Structure, Function and Interactions >Optimization of preparing a high yield and high cationic degree starch graft copolymer as environmentally friendly flocculant: Through response surface methodology
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Optimization of preparing a high yield and high cationic degree starch graft copolymer as environmentally friendly flocculant: Through response surface methodology

机译：优化制备高产高产高阳离子淀粉接枝共聚物作为环保絮凝剂：通过响应面方法

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摘要

To pursuit effective and environmentally friendly flocculant, a bio-copolymer was prepared by starch grafting with acrylamide (AM) and dimethyl diallyl ammonium chloride (DMDAAC) through an initiator system KMnO4/HIO4. The initiation and grafting reaction were optimized by the Response Surface Methodology. In the initiation reaction, the optimum condition was KMnO4 at 0.28 mmol, HIO4 at 0.25 mmol, and the temperature at 67.64 degrees C, when the highest copolymer yield of 13.43 g was obtained from 4 g raw starch. In the grafting reaction, the optimum condition was the temperature at 68.71 degrees C, (AM + DMDAAC)/starch anhydroglucose units molar ratio at 2 and the AM / (AM + DMDAAC) molar ratio at 034, when the copolymer had the maximum cationic degree of 1.54 meq/g. The optimized preparing method had a high grafting efficiency of 97.12 +/- 0.14% and high raw material utilization. The flocculation ability of the optimized graft copolymer was also tested. The result showed the graft starch was effective to remove reactive dyes and disperse dyes from wastewater. The dye removal efficiency of the graft starch was nearly 10% higher than polyacrylamide. Therefore, through the optimization of initiation and grafting reaction, the graft starch was a promising environmentally friendly flocculant. (C) 2018 Elsevier B.V. All rights reserved.
机译：为了追求有效和环保的絮凝剂，通过用引发剂体系KMnO4 / HiO 4通过用丙烯酰胺（AM）和二甲基二甲基氯化铵（DMDAAc）来制备生物共聚物。通过响应面方法优化起始和接枝反应。在起始反应中，最佳条件为0.28mmol，HiO 4的0.25mmol，67.64℃的温度为13.43g，从4g 1.4g 1.4g 1淀粉获得。在接枝反应中，最佳条件为68.71℃，（AM + DMDAAc）/淀粉硫粒糖单位摩尔比的温度为2和034时的AM /（AM + DMDAAc）摩尔比，当共聚物具有最大阳离子时1.54 meq / g的程度。优化的制备方法具有97.12 +/- 0.14％的高嫁接效率和高原料利用率。还测试了优化的接枝共聚物的絮凝能力。结果显示接枝淀粉有效地除去废水中的反应性染料和分散染料。移植淀粉的染料去除效率比聚丙烯酰胺高近10％。因此，通过优化引发和接枝反应，接枝淀粉是有前途的环保絮凝剂。 （c）2018年elestvier b.v.保留所有权利。

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