膜科学与技术

超滤膜的铸膜液的流变性及其对膜性能的影响

作者：王北福¹，吴清涛²，姜洪涛²

单位： 1浙江海洋学院石化与能源工程学院，舟山 316000；2浙江工业大学化学工程学院，杭州 310014

关键词：聚合物；膜；表面活性剂；流变学；非牛顿流体；不稳定性

出版年,卷(期):页码： 2016,36(2):28-33

摘要：

实验分别制备了添加不同表面活性剂及添加不同聚偏氟乙烯（PVDF）固含量的含有纳米SiO2的铸膜液，从表面活性剂、温度、剪切速率及PVDF固含量等不同方面考察铸膜液的流变性。结果表明，铸膜液中添加表面活性剂能得到较好的流变曲线，随着温度和剪切速率的增加，铸膜液的剪切粘度均下降，实验发现，存在临界剪切速率值，PVDF的添加量对铸膜液的流变性及性能有很大的影响。通过测试了部分不同铸膜液制备的膜的性能和微观结构，结果表明，不同铸膜液的膜的性能和结构均有着一定的差别。

Different types of membrane casting solution containing nano-SiO2were prepared by adding different kinds of surfactants and adding differentcontent of polyvinylidene fluoride (PVDF).The rheologyof membrane casting solution was studied from different aspects of adding surfactants, temperature, shear rate and PVDF content. The results showed that the casting solution with adding surfactants can get a better flow curve,and shear viscosity was decreased when temperature and shear rate was increased. Besides, the experiment found that the membrane casting solution had a critical shear rate value, the amount of PVDF has a great influence on the rheology and properties of casting solution. Some films were prepared using different types of casting solution and the properties and microstructure were tested.Theresults showed that different membranes had different performance and structure.

第一作者简介：王北福（1974-），男，博士，讲师。主要研究方向：油气储运三废处理与资源化利用、高强度耐污染膜材料的开发、新型膜组件设计与应用。wangbeifu@126.com

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