多糖基复合膜表面润湿性的调控及其在油水分离中的应用。
Manipulating the surface wettability of polysaccharide based complex membrane for oil/water separation.
机构信息
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China.
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China.
出版信息
Carbohydr Polym. 2019 Dec 1;225:115231. doi: 10.1016/j.carbpol.2019.115231. Epub 2019 Aug 21.
The treatment of oily wastewater is a global challenge owing to its diverse repercussions on environment and human life. The nanoporous complex membrane consisted of cellulose nanocrystals (CNC), chitin nanocrystals (ChiNC) and chitosan (CH) is fabricated on top of the poly (ethylene terephthalate) (PET) nonwoven fabric via a vacuum-assisted filtration method. The interactions among CNC, ChiNC and CH cause the formation of the membrane which shows underoil superhydrophobic property. The CH is demonstrated to play a key role in contributing to the hydrophobicity of membrane. Without any further treatment, the CNC/ChiNC/CH membrane is capable to separate water from water-in-oil emulsion with a high rejection. The separation performance is affected by the thickness of the prepared membrane which directly relates to the concentrations of the complex solutions. Such polysaccharide-based complex membranes with facile fabrication and low cost are promising for use in the field of oil/water separation.
含油废水的处理是一个全球性的挑战，因为它对环境和人类生活有着多方面的影响。通过真空辅助过滤法，在聚对苯二甲酸乙二醇酯（PET）无纺纤维布上制备了由纤维素纳米晶体（CNC）、壳聚糖纳米晶体（ChiNC）和壳聚糖（CH）组成的纳米多孔复合膜。CNC、ChiNC 和 CH 之间的相互作用导致了具有水下超疏油性的膜的形成。研究表明，CH 对膜的疏水性起着关键作用。无需进一步处理，CNC/ChiNC/CH 膜就能高效地将水从油包水乳液中分离出来。分离性能受所制备的膜的厚度影响，而膜的厚度又与复合溶液的浓度直接相关。这种基于多糖的复合膜具有制备简单、成本低等优点，有望在油水分离领域得到应用。
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