当前位置：
X-MOL 学术
›
Macromol. Mater. Eng.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Counterion‐Switched Reversibly Hydrophilic and Hydrophobic TiO2‐Incorporated Layer‐By‐Layer Self‐Assembled Membrane for Nanofiltration
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2019-10-09 , DOI: 10.1002/mame.201900481 Hongxia Guo 1 , Shaocheng Yu 1 , Tongtong Liu 2 , Quan‐Fu An 2 , Xiaoyan Ren 2 , Zhenping Qin 2 , Yucang Liang 3
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2019-10-09 , DOI: 10.1002/mame.201900481 Hongxia Guo 1 , Shaocheng Yu 1 , Tongtong Liu 2 , Quan‐Fu An 2 , Xiaoyan Ren 2 , Zhenping Qin 2 , Yucang Liang 3
Affiliation
|
The manipulation of surface wettability has been regarded as an efficient strategy to improve the membrane performances. Herein, the counterion‐switched reversibly hydrophilic and hydrophobic surface of TiO2‐loaded polyelectrolyte membrane are prepared by layer‐by‐layer assembly of poly(sodium 4‐styrene sulfonate) (PSS) and poly(diallydimethyl‐ammoniumchloride (PDDA) containing TiO2@PDDA nanoparticles (NPs) on the hydrolyzed polyacrylonitrile (PAN) substrate membrane. The obtained polyelectrolyte multilayer (PEM) membranes [PEM‐TiO2]4.5+X− (X− = Cl−, PFO− [perfluorooctanoate] etc.) show different hydrophilicity and hydrophobicity with various counterions. The integration of TiO2 NPs obviously improves the wettability and nanofiltration (NF) performance of PEM membrane for (non)aqueous system of dyes (crystal violet, eriochrome black T) with a high recyclability. The highly hydrophilic [PEM‐TiO2]4.5+Cl− (water contact angle [WCA]: 13.2 ± 1.8°) and hydrophobic [PEM‐TiO2]4.5+PFO− (WCA: 115.4 ± 2.3°) can be reversibly switched via counterion exchange between Cl− and PFO−, verifying the surface with a reversible hydrophilic–hydrophobic transformation. For such membranes, the morphology, wettability, and NF performance rely on the loading of TiO2@PDDA NPs and surface counterion. Meanwhile, the motion and interaction of water or ethanol in the hydrophilic or hydrophobic membrane are revealed by low‐field nuclear magnetic resonance. This work provides a facile and rapid approach to fabricate smart and tunable wetting surface for potential utilization in (non)aqueous NF separation.
中文翻译：
抗衡离子交换的可逆亲水性和疏水性TiO2结合层-多层自组装膜用于纳滤
表面润湿性的操纵已被认为是改善膜性能的有效策略。在此，通过聚（4-苯乙烯磺酸钠）（PSS）和含TiO（聚二烯丙基二甲基氯化铵（PDDA））的逐层组装，制备了负载有TiO 2的聚电解质膜的由离子平衡转换的可逆亲水性和疏水性表面。2 @PDDA纳米颗粒（NP）的水解的聚丙烯腈（PAN）基片膜将所得聚电解质多层（PEM）膜[PEM-TIO。2 ] 4.5 + X -（X - =氯-，PFO -[全氟辛酸酯]等）在各种抗衡离子中显示出不同的亲水性和疏水性。TiO 2 NPs的集成显着提高了PEM膜对染料（结晶紫，铬黑T）的（非）水性体系的可湿性和纳滤（NF）性能，具有很高的可回收性。的亲水性高的[PEM-TIO 2 ] 4.5 +氯-（水的接触角[WCA]：13.2±1.8°）和疏水性[PEM-的TiO 2 ] 4.5 + PFO -（WCA：115.4±2.3°），可以可逆地切换氯之间通过交换抗衡-和PFO -，通过可逆的亲水-疏水转化来验证表面。对于此类膜，形态，润湿性和NF性能取决于TiO 2 @PDDA NP的负载量和表面抗衡离子。同时，水或乙醇在亲水或疏水膜中的运动和相互作用通过低场核磁共振得以揭示。这项工作提供了一种简便而快速的方法来制造智能和可调的润湿表面，以潜在地用于（非）水性NF分离。
更新日期：2019-12-05
中文翻译：
抗衡离子交换的可逆亲水性和疏水性TiO2结合层-多层自组装膜用于纳滤
表面润湿性的操纵已被认为是改善膜性能的有效策略。在此，通过聚（4-苯乙烯磺酸钠）（PSS）和含TiO（聚二烯丙基二甲基氯化铵（PDDA））的逐层组装，制备了负载有TiO 2的聚电解质膜的由离子平衡转换的可逆亲水性和疏水性表面。2 @PDDA纳米颗粒（NP）的水解的聚丙烯腈（PAN）基片膜将所得聚电解质多层（PEM）膜[PEM-TIO。2 ] 4.5 + X -（X - =氯-，PFO -[全氟辛酸酯]等）在各种抗衡离子中显示出不同的亲水性和疏水性。TiO 2 NPs的集成显着提高了PEM膜对染料（结晶紫，铬黑T）的（非）水性体系的可湿性和纳滤（NF）性能，具有很高的可回收性。的亲水性高的[PEM-TIO 2 ] 4.5 +氯-（水的接触角[WCA]：13.2±1.8°）和疏水性[PEM-的TiO 2 ] 4.5 + PFO -（WCA：115.4±2.3°），可以可逆地切换氯之间通过交换抗衡-和PFO -，通过可逆的亲水-疏水转化来验证表面。对于此类膜，形态，润湿性和NF性能取决于TiO 2 @PDDA NP的负载量和表面抗衡离子。同时，水或乙醇在亲水或疏水膜中的运动和相互作用通过低场核磁共振得以揭示。这项工作提供了一种简便而快速的方法来制造智能和可调的润湿表面，以潜在地用于（非）水性NF分离。
京公网安备 11010802027423号