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首页> 外文期刊>RSC Advances >A superhydrophilic and underwater superoleophobic chitosan-TiO2 composite membrane for fast oil-in-water emulsion separation
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A superhydrophilic and underwater superoleophobic chitosan-TiO2 composite membrane for fast oil-in-water emulsion separation

机译：一种超硫酸水下超级壳聚糖 - TiO2复合膜，用于快速水乳液分离

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摘要

Oil/water separation has become a worldwide challenge due to large volumes of industrial oily wastewater and frequent oil spill accidents, which constitute an enormous threat to human and biological safety. Herein, a superhydrophilic and underwater superoleophobic composite membrane was fabricated using the vacuum-assisted filtration technique of assembly of chitosan (CS) and titanium dioxide (TiO2) on a cellulose acetate membrane for emulsified oil separation. The hydrophilic chitosan-TiO2 (CST) composite and nanoscale hierarchical structure are beneficial for forming a water layer that can repel the infiltration of oil droplets into the membrane. The modified membrane demonstrated an excellent flux up to 6002.5 L m(-2) h(-1) for hexadecane-in-water emulsion, which is one order of magnitude higher than traditional filtration membranes. Furthermore, the separation efficiency for all of the emulsified oils is above 97%, indicating superior oil/water separation performance. Most importantly, the modified membrane can maintain underwater superoleophobicity even in corrosive aqueous media, including strongly acidic, strongly alkaline, and highly saline solutions. It is expected that the chitosan-TiO2 composite membrane can be potentially useful in treating oily wastewater from industry and daily life.
机译：由于大量的工业油性废水和频繁的漏油事故，石油/水分分离已成为全球挑战，这构成了对人类和生物安全造成巨大威胁。在此，使用耐壳聚糖（Cs）和二氧化钛（TiO2）组装的真空辅助过滤技术在乙酸纤维素膜上制备过硫酸和水下超级复合膜，用于乳化油状物。亲水性壳聚糖-TiO2（CST）复合材料和纳米级等级结构是有益于形成水层，其可以排斥油滴进入膜中的油滴。改性膜的优异助焊剂高达6002.5μm（-2）H（-1）的过氟醚乳液，其比传统过滤膜高一种数量级。此外，所有乳化油的分离效率高于97％，表明出色的油/水分离性能。最重要的是，改性膜即使在腐蚀性含水介质中也可以保持水下超脂肪性，包括强酸性，强碱性和高盐酸溶液。预期壳聚糖-TiO2复合膜可能潜在可用于处理工业和日常生活的油性废水。

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  • 来源
    《RSC Advances》 |2017年第66期|共9页
  • 作者

    Du Yanqing; Li Yujiang; Wu Tao;

  • 作者单位

    Shandong Univ Sch Environm Sci &

    Engn Shandong Prov Key Lab Water Pollut Control &

    Reso Jinan 250100 Shandong Peoples R China;

    Shandong Univ Sch Environm Sci &

    Engn Shandong Prov Key Lab Water Pollut Control &

    Reso Jinan 250100 Shandong Peoples R China;

    Shandong Univ Key Lab Colloid &

    Interface Sci Educ Minist Jinan 250100 Shandong Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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