Restructuring the surface of polyurethane resin enforced filter media to separate surfactant stabilized oil-in-water emulsions via coalescence
Restructuring the surface of polyurethane resin enforced filter media to separate surfactant stabilized oil-in-water emulsions via coalescence
复制标题
重构聚氨酯树脂增强过滤介质的表面，通过聚结分离表面活性剂稳定的水包油乳液
DOI：
10.1016/j.seppur.2016.07.051
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发表时间：
2017-01-01
影响因子：
8.6
通讯作者：
Yang, Chuanfang
中科院分区：
文献类型：
--
作者：
Hu, Dan;Li, Lei;Yang, Chuanfang
本文报道了一种简单的树脂乳化方法，通过控制树脂固化溶剂挥发的初始水平来处理聚氨酯强化过滤介质。处理后的介质具有不同程度的亲脂性，这是由它们的亲脂/亲水（L/H）值决定的。以无表面活性剂乳状液为基准，确定了表面活性剂稳定水包油乳状液聚结分离的最佳处理条件。开始分离效率与表面活性剂的种类有关，其顺序为非离子表面活性剂80 bbb、阳离子表面活性剂十六烷基三甲基溴化铵(CTAB) >、阴离子表面活性剂十二烷基苯磺酸钠（SDBS）。石英晶体微天平（QCM）实验表明，Tween 80对聚氨酯涂层的吸附量最大，对SDBS的吸附量最小，对CTAB的吸附量一般。然而，与其他表面活性剂相比，Tween 80的时间加权平均效率最低，这些表面活性剂几乎不会随着过滤时间的推移而产生任何效率变化。为了使树脂乳化处理更加环保，测试了更多的极性溶剂，并确定了乙醇作为异丙醇的良好替代品。(C) 2016年Elsevier B.V.出版
Reported here is a facile resin emulsification method of treating polyurethane enforced filter media by controlling the initial level of solvent volatilization for resin solidification. The treated media are endowed with varying degrees of lipophilicity as determined by their lipophilic to hydrophilic (L/H) values. An optimized treatment condition was pinned for coalescence separation of surfactant-stabilized oil in-water emulsions using a surfactant free emulsion as the bench mark. The starting separation efficiency was found to depend on the type of surfactant involved in the order of non-ionic surfactant Tween 80 > cationic surfactant cetyl trimethyl ammonium bromide (CTAB) > anionic surfactant sodium dodecyl benzene sulfonate (SDBS). Quartz crystal microbalance (QCM) experiments showed that Tween 80 had the largest adsorption on the polyurethane coating, while least adsorption occurred to SDBS, and mediocre adsorption to CTAB. However, Tween 80 resulted in the lowest time-weighted averaged efficiency as compared to the other surfactants that barely caused any efficiency changes with filtration time. To make the resin emulsification treatment more environmental friendly, more polar solvents were tested, and ethanol was identified as a good alternative to isopropanol. (C) 2016 Published by Elsevier B.V.