Journal of the Taiwan Institute of Chemical Engineers ( IF 5.5 ) Pub Date : 2021-12-25 , DOI: 10.1016/j.jtice.2021.104181 Jinxue Cheng 1, 2 , Naijia Zhao 1, 2 , Yan Huang 3 , Changfa Xiao 1 , Xiao Ma 4 , Qinglin Huang 1, 2
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Background
Membrane emulsification (ME) is an attractive membrane process to produce various kind of simple or multiple emulsions. The membrane utilized in ME process should have high dispersed phase flux, narrow pore size distribution and excellent antifouling property.
Methods
This work proposed a novel near-field electrospun (NFES) poly(tetrafluoroethylene) (PTFE) membranes with ordered rectangular pore geometry. Compared with other membranes, the order pore geometry of NFES PTFE membrane was helpful to obtain a more homogeneous and more stable water-in-oil (W/O) emulsion.
Significant findings
The droplet size was simply controlled by the NFES PTFE membrane pore size. And NFES PTFE membrane was more conducive to the formation of droplets with narrow droplet size distribution because of its unique straight rectangular membrane pore geometry. In addition, W/O emulsion droplet size be regulated in coordination with operating parameters and phase parameters. Results indicated that a smaller rectangular pore area of PTFE membrane would lead to a smaller droplet size. Introducing of shear stress in the continuous phase was contributed to the generation of monodisperse droplets. When the emulsifier (Span 80) content was 1wt%, the smallest droplet size (∼103.6 nm) was obtained.
中文翻译：
参数对近场静电纺聚四氟乙烯膜ME工艺的影响
背景
膜乳化 (ME) 是一种极具吸引力的膜工艺，可用于生产各种简单或多重乳液。ME工艺中使用的膜应具有高分散相通量、窄孔径分布和优良的防污性能。
方法
这项工作提出了一种具有有序矩形孔几何形状的新型近场电纺 (NFES) 聚四氟乙烯 (PTFE) 膜。与其他膜相比，NFES PTFE 膜的有序孔几何结构有助于获得更均匀、更稳定的油包水 (W/O) 乳液。
重要发现
液滴尺寸仅由 NFES PTFE 膜孔径控制。NFES PTFE膜由于其独特的直矩形膜孔几何形状，更有利于形成具有窄液滴尺寸分布的液滴。此外，W/O 乳液液滴尺寸可与操作参数和相参数协调调节。结果表明，较小的矩形孔面积的 PTFE 膜会导致较小的液滴尺寸。在连续相中引入剪切应力有助于产生单分散液滴。当乳化剂 (Span 80) 含量为 1wt% 时，获得最小的液滴尺寸 (~103.6 nm)。
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