Fabrication of semi-aromatic polyamide/spherical mesoporous silica nanocomposite reverse osmosis membrane with superior permeability
Fabrication of semi-aromatic polyamide/spherical mesoporous silica nanocomposite reverse osmosis membrane with superior permeability
复制标题
优异渗透性半芳香聚酰胺/球形介孔二氧化硅纳米复合反渗透膜的制备
DOI：
10.1016/j.apsusc.2015.12.028
复制
发表时间：
2016-02-15
影响因子：
6.7
通讯作者：
Zhang, Meng
中科院分区：
文献类型：
--
作者：
Li, Qiang;Yu, Hui;Zhang, Meng
以间苯二胺水溶液和环己烷-1，3，5-三甲酰氯/介孔硅球(MSS)有机溶液为主要原料，成功制备了半芳香族聚酰胺(SAP)/球形介孔二氧化硅纳米复合反渗透(RO)膜。实验表明，聚酰胺膜的表面形态、聚合物骨架结构、表面电荷密度、亲水性、阻挡层厚度等与对照样品(全芳香族聚酰胺膜和半芳香族聚酰胺膜)的微观结构和表面特征有明显不同。结果表明，在所制备的SAP/MSS反渗透膜表面均匀嵌入了孔径约为1.5 nm的MSSS。此外，分离性能测试结果表明，在1.5 Mpa的操作压力和2000 mg/L的氯化钠溶液中，随着MSSS从0.02增加到0.08w/v%，膜的渗透率在62.53~72.73wv/m(2)h之间，明显优于对照样品。同时，它们的盐分截留率仍能维持在相当的水平(94.78-91.46%)。纳米复合反渗透膜的优异分离性能与其具有更高自由度的半芳香族骨架、MSSS的引入、表面亲水性的提高、阻挡层的增薄以及表面负电荷密度的提高密切相关。(C)2015爱思唯尔B.V.保留所有权利。
Semi-aromatic polyamide (SAP)/spherical mesoporous silica nanocomposite reverse osmosis (RO) membrane was successfully fabricated using m-phenylene diamine aqueous solution and cyclohexane1,3,5-tricarbonyl chloride/mesoporous-silica-sphere (MSS) organic solution as main raw materials. The experimental suggests that the microstructures and surface features are significantly different from those of the contrast samples (the full- and semi-aromatic polyamide membranes), including the surface morphology, polymer framework structure, surface charge density, hydrophilicity, and the thickness of barrier layer. It was observed that many MSSs with ca. 1.5 nm of pore size are evenly embedded on the surface of the fabricated SAP/MSS RO membrane. Furthermore, the separation performance testing results indicate that the permeabilities range from 62.53 to 72.73 L/m(2) h with the increase of the introduced MSSs from 0.02 to 0.08 w/v % under 1.5 MPa operating pressure and 2000 mg/L NaCl solution, which is obviously better than the contrast samples. Simultaneously, their salt rejections can be still maintained at a comparable level (94.78-91.46%). The excellent separation performance of the nanocomposite RO membrane is closely related to the higher-freedom-degree semi-aromatic framework, the incorporation of MSSs, the improved surface hydrophilicity, the thinner barrier layer, and the enhanced surface negative charge density. (C) 2015 Elsevier B.V. All rights reserved.