Zhang Yongya, Deng Xi, Zhang Liren, Chen Bihua, Ding Tong, Ni Bing, Gao Guohua
Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering , East China Normal University , 3663 North Zhongshan Road , Shanghai 200062 , China.
Henan Key Laboratory of Biomolecular Recognition and Sensing, College of Chemistry and Chemical Engineering , Shangqiu Normal University , Shangqiu 476000 , Henan , China.
ACS Appl Mater Interfaces. 2019 Apr 17;11(15):14347-14353. doi: 10.1021/acsami.9b02085. Epub 2019 Apr 4.
A kind of oil/water separation membrane, combining poly(ionic liquid) (PIL) and three-dimensional (3D) wire mesh, was designed and prepared via one-step photopolymerization of an ionic liquid monomer 1,8-triethylene glycoldiyl-3,3'-divinylimidazolium dibromide ([DVIm-(EG)]Br) with acrylic acid in the mesh. The composite membrane (PIL@Mesh) had the advantages of anti-oil-adhesion property and high mechanical strength simultaneously. The morphology of PIL@Mesh characterized by scanning electron microscopy (SEM) and Cryo-SEM demonstrated that PIL swelled in water to construct microscale 3D networks. The 3D networks of swelling PIL were capable of forming a hydration layer and endowed PIL@Mesh with superhydrophilicity, which made the membrane to transport water but to intercept oil. PIL@Mesh showed excellent separation efficiency (above 99.9%) for various oil/water mixtures, large water flux (47 L·m·s), and high intrusion pressure (1.2 kPa). Meanwhile, it performed well in recyclability and corrosion-resistant under harsh conditions, such as acid, alkaline, and salty environments.
一种将聚离子液体（PIL）与三维（3D）金属丝网相结合的油/水分离膜，通过离子液体单体1,8 - 三甘醇二乙烯基 - 3,3'-二乙烯基咪唑二溴化物（[DVIm-(EG)]Br）与丙烯酸在金属丝网中一步光聚合反应设计并制备而成。复合膜（PIL@Mesh）同时具有抗油粘附性能和高机械强度的优点。通过扫描电子显微镜（SEM）和低温扫描电子显微镜（Cryo-SEM）对PIL@Mesh的形貌进行表征，结果表明PIL在水中溶胀以构建微观尺度的三维网络。溶胀的PIL三维网络能够形成水合层，并赋予PIL@Mesh超亲水性，这使得该膜能够传输水但截留油。PIL@Mesh对各种油/水混合物表现出优异的分离效率（高于99.9%）、较大的水通量（47 L·m·s）和较高的抗侵入压力（1.2 kPa）。同时，它在诸如酸性、碱性和含盐环境等苛刻条件下的可回收性和耐腐蚀性方面表现良好。
