Controlling the formation of porous polyketone membranes via a cross-linkable alginate additive for oil-in-water emulsion separations
Controlling the formation of porous polyketone membranes via a cross-linkable alginate additive for oil-in-water emulsion separations
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DOI：
10.1016/j.memsci.2020.118362
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发表时间：
2020-10-01
影响因子：
9.5
通讯作者：
Matsuyama, Hideto
中科院分区：
文献类型：
--
作者：
Guan, Kecheng;Zhang, Lei;Matsuyama, Hideto
具有多孔结构的聚合物膜在广泛的研究领域中引起了极大的关注。非溶剂诱导相分离（NIPS）是聚合物溶液在相分离过程中通过非溶剂渗透而产生的一种微孔。在这项工作中，脂肪族聚酮（PK）被用作NIPS的聚合物基质，和藻酸盐添加剂被掺杂到溶液中，以诱导在相分离过程中由藻酸盐的流动性控制的加速或抑制的溶剂-非溶剂交换速率。结果表明，PK膜的孔径大小可控，且具有理想的透水性。此外，膜基质中的藻酸盐添加剂还改善了亲水性，这有利于水传输和耐油污染。优化膜的水包油（O/W）乳液分离性能在很大程度上取决于其改变的膜孔结构和性质，表明该方法用于NIPS衍生的聚合物膜的有效性和可行性。藻酸盐提供的相分离控制也可适用于需要孔改性的其他聚合物膜的制造。
Polymeric membranes with porous structures have attracted significant attention across a wide range of research fields. Nonsolvent-induced phase separation (NIPS) generates pores during the phase separation of a polymer solution via the nonsolvent penetration. In this work, an aliphatic polyketone (PK) was employed as a polymer matrix for NIPS, and an alginate additive was doped into the solution to induce either an accelerated or inhibited solvent-nonsolvent exchange rate controlled by alginate mobility during phase separation. As a result, the pore size of PK membrane was controllable and a desirable water permeance was achieved. Furthermore, the alginate additive within the membrane matrix also improved hydrophilicity, which is favorable for water transport and oil-fouling resistance. The oil-in-water (O/W) emulsion separation performances of optimized membranes largely depended on their altered membrane pore structures and properties, indicating the effectiveness and feasibility of this approach for NIPS-derived polymeric membranes. Alginate-rendered control of phase separation may also be applicable for the fabrication of other polymeric membranes that require pore modifications.