OALib Journal期刊
两性表面活性剂与阴离子聚丙烯酰胺复配体系的抗盐性
DOI: 10.11777/j.issn1000-3304.2015.14158
Keywords: 两性表面活性剂 ,HPAM ,无机盐 ,pH ,黏度 ,抗盐性 ,均匀实验 ,非线性回归
Abstract:
通过单因素实验分析两性表面活性剂浓度、无机盐浓度及pH值对聚丙烯酰胺复配体系黏度的影响规律,应用SPSS软件对均匀实验结果进行非线性回归,得到复配体系黏度与聚合物浓度、两性表面活性剂浓度及无机盐浓度的定量关系式,进而理论分析了各因素对复配体系抗盐性的影响规律.结果表明,当两性表面活性剂的浓度低于临界缔合浓度(CAC)时,复配体系的黏度变化不大;当其浓度高于CAC后,随着浓度的增加,体系黏度急剧增大;当其浓度达到聚合物饱和浓度(PSP),复配体系黏度达到最大值;当再进一步加入表面活性剂时,聚集体间的网状结构将被破坏,从而使体系黏度逐渐降低;无机盐对复配体系的作用具有双重性,低浓度盐将促使体系黏度升高,中高浓度盐则会导致体系黏度降低;不同pH值条件下,复配体系的抗盐能力顺序为碱性(pH=11.4)>酸性(pH=2.8)>中性(pH=7).
References
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