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化工学报  2014 

响应面法优化制备PAC-PDMDAAC杂化絮凝剂及其表征

DOI: 10.3969/j.issn.0438-1157.2014.02.051, PP. 731-736

Keywords: 混凝,制备,优化,响应曲面法,有机-无机杂化

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Abstract:

以硅烷偶联剂KH570为改性剂,以过硫酸铵为引发剂,合成了聚合氯化铝-聚二甲基二烯丙基氯化铵(PAC-PDMDAAC)杂化絮凝剂。采用响应面分析法通过建立特征黏度与各因素之间的Box-Behnken数学模型,对杂化PAC-PDMDAAC的制备工艺进行优化,最优制备条件为:DMDAAC质量分数为33%,引发剂质量分数为0.6%,反应温度为64℃,反应时间为3h。电导测试、傅里叶红外光谱(FT-IR)及热重分析(TGA)结果表明PAC-PDMDAAC杂化产物的有机-无机组分间以共价键形式键合,性质稳定;扫描电镜(SEM)照片显示其结构疏松,粒度较大,更易发挥吸附架桥作用。

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