Eco-friendly construction of dye-fouled loose CS/PAN nanofibrous composite membranes for permeability-selectivity anti-trade-off property
Eco-friendly construction of dye-fouled loose CS/PAN nanofibrous composite membranes for permeability-selectivity anti-trade-off property
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环保型染料污染松散CS/PAN纳米纤维复合膜的渗透性-选择性抗权衡性能
DOI：
10.1016/j.colsurfa.2019.02.068
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发表时间：
2019-05
期刊：
影响因子：
--
通讯作者：
Wang Xuefen
中科院分区：
文献类型：
--
作者：
Shen Lingdi;Pei Xin;Han Jing;Zhang Tonghui;Li Peiyun;Wang Xuefen
复合型纳滤膜的广泛应用受到选择性和渗透性之间的“权衡效应”的极大限制。在这项工作中，通过在高度多孔的聚丙烯腈(PAN)电纺纳米纤维支架上构建疏松的壳聚糖(CS)涂层来打破这种权衡效应。由于阴离子染料与壳聚糖膜的静电相互作用比传统化学交联剂交联的壳聚糖膜弱得多，因此通过阴离子染料污染来稳定壳聚糖来提高膜的通透性，从而实现了疏松的壳聚糖膜。据我们所知，关于染料污染的CS纳滤膜的研究报道很少。优化后的膜对阴离子染料(˜139.1 L m−2h−1，0.1 Mpa)和对100˜mg/L的直接红80(DR80)溶液的截留率(˜99.8%)和阳离子染料的分离(如爱新蓝8GX(AB8GX)，截留率为99.7%)表现出优异的过滤性能。此外，由于CS-DR80/PAN膜具有较低的表面粗糙度和较高的表面亲水性，因此具有良好的长期耐久性和抗污染性能。优异的纳滤性能主要归功于两层结构的协同作用：亲水性松散的带负电荷的阻挡层和高孔度的PAN纳米纤维支架。疏松的阻挡层和电纺PAN纳米纤维基板可保证高渗透性，带负电荷的膜表面可确保高截留率。该方法不仅省去了复杂的工艺过程，而且省去了有毒、昂贵成分的使用，为纺织废水的处理提供了一种环保和实用的可行性。
The wide application of composite nanofiltration membrane is greatly restricted by the “trade-off effect” between selectivity and permeability. In this work the trade-off effect was broken by an eco-friendly construction of loose chitosan (CS) coating layer on highly porous polyacrylonitrile (PAN) electrospun nanofibrous scaffold. The loose CS layer was accomplished by stabilizing CS with anionic dyes fouling to enhance the membrane permeability, because their electrostatic interaction was much weaker than CS membrane crosslinked by traditional chemical crosslinkers. To the best of our knowledge, few researches were reported on the dye-fouled CS nanofiltration membrane. The optimized membranes demonstrated excellent filtration performance for anionic dyes separation with superior permeate flux (˜139.1 L m−2h−1at 0.1 MPa) and high rejection (˜99.8%) to direct red 80 (DR80) solution of 100 mg/L, as well as cationic dyes separation (like alcian blue 8GX (AB8GX) with rejection of 99.7%). Besides, the CS-DR80/PAN membranes exhibited excellent long-term durability and antifouling nature due to low surface roughness and high surface hydrophilicity. The superior nanofiltration performance was chiefly attributed to the coordinated effect of two-tier structure: the hydrophilic loose negatively-charged barrier layer and the highly porous PAN nanofibrous scaffold. The loose barrier layer and electrospun PAN nanofibrous substrate can guarantee the high permeability, and the negatively charged membrane surface can assure the high rejection due to Donnan repulsion. This strategy not only abridges the complicated process, but also eliminates use of poisonous and expensive ingredients, which provides an eco-friendly and practical feasibility for textile wastewater treatment.
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DOI：
--
发表时间：
2016
期刊：
--
影响因子：
--
作者：
Shuang-Mei Xue;Zhen-liang Xu;Yong-Jian Tang;Chen-Hao Ji
通讯作者：
Shuang-Mei Xue;Zhen-liang Xu;Yong-Jian Tang;Chen-Hao Ji
用于渗透汽化的紫外交联壳聚糖/聚乙烯吡咯烷酮共混膜
影响因子：
3.9
作者：
Zhang, Qiu Gen;Hu, Wen Wei;Zhu, Ai Mei;Liu, Qing Lin
通讯作者：
Liu, Qing Lin
影响因子：
8.8
作者：
Chiou, MS;Li, HY
通讯作者：
Li, HY
影响因子：
9.5
作者：
Lin, Jiuyang;Tang, Chuyang Y.;Van der Bruggen, Bart
通讯作者：
Van der Bruggen, Bart
影响因子：
8.6
作者：
Peydayesh, Mohammad;Mohammadi, Toraj;Bakhtiari, Omid
通讯作者：
Bakhtiari, Omid