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首页> 外文期刊>Journal of Applied Polymer Science >Fabrication of efficient pervaporation desalination membrane by reinforcement of poly(vinyl alcohol)-silica film on porous polysulfone hollow fiber
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Fabrication of efficient pervaporation desalination membrane by reinforcement of poly(vinyl alcohol)-silica film on porous polysulfone hollow fiber

机译：通过聚（乙烯醇） - 硅膜对多孔聚砜中空纤维的高效渗透釜脱盐膜的制备

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摘要

Pervaporation membrane technology is commercially successful in the dehydration of organic solvents, and the technology has potential for seawater desalination with high recovery because of its capability to treat highly saline water. But to make the technology advantageous over the other available membrane desalination technologies in terms of productivity flux without additional energy cost, the selective barrier layer is required to be extremely thin, defect-free, hydrophilic, and selective to water. In this work, we prepared an efficient membrane by reinforcing a highly water-permeable but continuous barrier layer of poly(vinyl alcohol)-silica (PVA-SiO2) hybrid material on porous polysulfone hollow fibers. The PVA-SiO2 in acidified and hydrated ethanol was aged at room temperature for a period to allow solvent evaporation to obtain the solution concentration desired for the reinforcement. The reinforced hollow fiber membrane with optimal PVA-SiO2 barrier layer thickness exhibited a performance with a flux of 20.6L m(-2) h(-1) and 99.9% salt rejection from a saline feed of 2000ppm NaCl at 333 K. The effects of PVA-SiO2, temperature, and feed salinity on the pervaporation performance of the membrane were also studied. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45718.
机译：渗透汽化膜技术在有机溶剂脱水商业上的成功，以及该技术具有与因为它有能力处理高盐水的高回收率海水淡化潜力。但是，为了使该技术在无需额外的能量成本生产率通量方面优于其他可用的膜脱盐技术，选择性阻挡层需要是非常薄，无缺陷的，亲水性的，和选择性的水。在这项工作中，我们通过加强对多孔聚砜空心纤维的聚（乙烯醇）的高度水可渗透的但连续的阻挡层 - 二氧化硅（PVA-的SiO 2）杂化材料制得的有效的膜。在酸化和水合乙醇PVA-的SiO 2是在室温下老化一段时间，以允许溶剂蒸发以获得所需的用于加强的溶液浓度。的增强的中空纤维膜具有最佳PVA-的SiO 2阻挡层厚度在333 K的作用表现出与的20.6L米（-2）H（-1），和99.9％的盐从2000ppm的氯化钠的盐水进料排斥中磁通的性能PVA-的SiO 2，在膜的渗透蒸发性能的温度，和进料盐度也进行了研究。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018年，135，45718。

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