Poly(ionic liquid)-Coated Meshes with Opposite Wettability for Continuous Oil/Water Separation

Abstract

A series of oil/water separation membranes with tunable surface wettability based on poly­(ionic liquid)­s (PILs) were prepared via a facile one-step photopolymerization of N-vinylimidazolium ionic liquids and divinylbenzene on meshes. The wettability of PIL-based membranes (PILMs) was adjusted by the structures of PILs, specifically the alkyl chain length of imidazolium (butyl and octyl) and anion species (acrylic anion, Br–, and PF6 –). Tunability of wettability resulted in the hydrophilic or hydrophobic property of PILMs. The hydrophilic poly­(1-vinyl-3-butylimidazolium acrylate)-based membrane (PILM-1) transported water and intercepted oil, while the hydrophobic poly­(1-vinyl-3-octylimidazolium hexafluorophosphate)-based membrane (PILM-5) removed oil and rejected water. The two membranes with opposite wettability showed excellent oil/water separation efficiency (above 99%) in batch processes. Continuous oil/water separation was also achieved by assembling PILM-1 and PILM-5 on the fabricated devices. A T-type device could separate various oil/water mixtures continuously, and a tank-type device could separate dispersed oil/water mixtures, with a handling capacity of 46 L within 12 h.

Strategies to Achieve a Ferrocene-Based Polymer with Reversible Redox Activity for Chiral Electroanalysis of Nonelectroactive Amino Acids

“…Furthermore, two peaks at 708.1 and 721.1 eV are visible in Figure A, corresponding to the Fe­(2p 3/2 ) and Fe­(2p 1/2 ) signals. They are the typical Fe­(2p) spectrum of ferrocene, consistent with a previously published study. − Two peaks that appear at 687.1 and 137.1 eV are attributed to F 1s and P 2p (Figure A), which validate the presence of PF 6 – moieties. , …”

“…48−50 Two peaks that appear at 687.1 and 137.1 eV are attributed to F 1s and P 2p (Figure 4A), which validate the presence of PF 6 − moieties. 51,52 Electrochemical Properties of (S,S)-p-CVB-Fc. Cyclic voltammograms (CVs) and impedance spectra were performed to evaluate the electrochemical behavior of (S,S)-p-CVB-Fc.…”

Preparation and Separation Properties of Electrospinning Modified Membrane with Ionic Liquid Terminating Polyimide/Polyvinylpyrrolidone@Polydopamine

“…The addition of PVP also improved the viscosity of the solution and internal banding of fibers. To conclude, from the process as detailed, the addition of IL improved the conductivity of the spinning solution [28,29]. The overall trend of the spun fiber diameters remains broader, with a more uniform diameter distribution across all fibers.…”

The synthesis and application of poly(ionic liquid)s functional materials

“…聚离 3 子液体兼具离子液体(ionic liquids)的特性(如结构多 4 样性、可调溶解性、化学/热稳定性、导电性等)和聚 5 合物的机械性能和加工性. 按照阴阳离子与聚合物 6 的链接方式，聚离子液体可以分为：聚阳离子型，即 7 阳离子基团通过共价键连接到聚合物主链上 [2] ；聚阴 8 离子型，即阴离子与聚合物主链间通过共价键连接 [3] ； 9 两性聚合物， 阴阳离子通过共价键连接到聚合物主链 10 上 [4] . 此外，通过在聚离子液体化学结构中引入功能 11 [14] .…”

“…22 Figure 1 Scheme illustrated the synthesis of poly(ionic 23 liquid)s-based adsorbents [14] . 24 2 suspension polymerization [18] . 55 [19] [28] .…”