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A facile and viable approach to fabricate polyamide membranes functionalized with graphene oxide nanosheets

机译：制造用石墨烯纳米片官能化的聚酰胺膜的容易和可行的方法

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摘要

Recently, graphene oxide (GO) nanosheet modified polyamide reverse osmosis (PA RO) membranes have been widely studied to improve the hydrophilicity and antifouling performance of PA RO membranes. However, a viable strategy for grafting GO nanosheets on the membrane surface remains challenging. In this study, a facile and viable approach to fabricate PA membranes functionalized with GO nanosheets is presented. The strategy is to react the primary amine functional groups of aminated GO (AGO) with the unreacted acid chloride groups of the nascent PA membrane. The successful grafting of AGO nanosheets on a membrane surface was demonstrated by field emission scanning electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy. The effects of grafted AGO nanosheets on membrane surface properties were evaluated by contact angle goniometer, atomic force microscopy and electrokinetic analyzer. In addition, the AGO nanosheet dipping concentration was optimized by assessing the desalination performance under brackish water desalination conditions. With 0.15 wt% AGO nanosheet dipping concentration, the resulting surface functionalized membrane showed a water flux of 5.62 L per m(2) per h per bar and a salt rejection of 97.9%. Compared to the control PA membrane, the surface functionalized membrane exhibited 45.2% higher water flux and comparable salt rejection. Moreover, the PA membrane functionalized with GO nanosheets showed better antifouling performance.
机译：最近，已广泛研究了石墨烯氧化物（GO）纳米片改性聚酰胺反渗透（PA RO）膜，以改善PA Ro膜的亲水性和防污性能。然而，在膜表面上嫁接纳米片的可行策略仍然具有挑战性。在该研究中，提出了一种易于制造与GO纳米片官能化的PA膜的容易和可行的方法。该策略是用新生PA膜的未反应酰氯基团反应常规胺官能团的胺胺官能团。通过现场发射扫描电子显微镜，拉曼光谱和X射线光电子能量，证明了以前覆盖膜表面上的纳米片。接枝前纳米片对膜表面性质的影响是通过接触角焦仪，原子力显微镜和电动分析仪评价的。此外，通过在咸水脱盐条件下评估脱盐性能来优化纳米片浸渍浓度。含0.15重量％纳米液浸渍浓度，所得表面官能化膜显示每杆每杆/每杆5.62μm（2）的水通量，盐排斥为97.9％。与对照PA膜相比，表面官能化膜表现出45.2％的水通量和相当的盐排斥。此外，通过GO纳米片官能化的PA膜显示出更好的防污性能。

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  • 来源
    《RSC Advances》 |2017年第84期|共9页
  • 作者

    Pang Ruizhi; Zhang Kaisong;

  • 作者单位

    Chinese Acad Sci Inst Urban Environm Key Lab Urban Pollutant Convers Xiamen 361021 Peoples R China;

    Chinese Acad Sci Inst Urban Environm Key Lab Urban Pollutant Convers Xiamen 361021 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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