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首页> 美国卫生研究院文献>Membranes >ZnO Microfiltration Membranes for Desalination by a Vacuum Flow-Through Evaporation Method
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ZnO Microfiltration Membranes for Desalination by a Vacuum Flow-Through Evaporation Method

机译：真空流通蒸发法用于海水淡化的ZnO微滤膜

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ZnO was deposited on macroporous α-alumina membranes atomic layer deposition (ALD) to improve water flux by increasing their hydrophilicity and reducing mass transfer resistance through membrane pore channels. The deposition of ZnO was systemically performed for 4–128 cycles of ALD at 170 °C. Analysis of membrane surface by contact angles (CA) measurements revealed that the hydrophilicity of the ZnO ALD membrane was enhanced with increasing the number of ALD cycles. It was observed that a vacuum-assisted ‘flow-through’ evaporation method had significantly higher efficacy in comparison to conventional desalination methods. By using the vacuum-assisted ‘flow-through’ technique, the water flux of the ZnO ALD membrane (~170 L m h ) was obtained, which is higher than uncoated pristine membranes (92 L m h ). It was also found that ZnO ALD membranes substantially improved water flux while keeping excellent salt rejection rate (>99.9%). Ultrasonic membrane cleaning had considerable effect on reducing the membrane fouling.
机译：ZnO沉积在大孔α-氧化铝膜原子层沉积（ALD）上，通过增加亲水性并降低通过膜孔通道的传质阻力来改善水通量。 ZnO的沉积在170°C下进行了4–128个ALD循环。通过接触角（CA）测量对膜表面的分析表明，随着ALD循环次数的增加，ZnO ALD膜的亲水性得到增强。据观察，与传统的脱盐方法相比，真空辅助的“流通式”蒸发方法具有更高的功效。通过使用真空辅助“流通”技术，可以获得ZnO ALD膜的水通量（〜170 L m h），高于未涂覆的原始膜（92 L m h）。还发现，ZnO ALD膜可显着改善水通量，同时保持出色的脱盐率（> 99.9％）。超声波膜清洗在减少膜污染方面有相当大的作用。

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