Department of Chemistry, Gandhigram Rural Institute - Deemed University, Gandhigram, Dindigul District, 624302, Tamilnadu, India.
Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, 2000, Maribor, Slovenia.
J Environ Manage. 2018 Dec 15;228:249-259. doi: 10.1016/j.jenvman.2018.09.039. Epub 2018 Sep 15.
The requirement of promoting a revolution in filtration technology has led to growing devotion in advanced functional materials such as electrospun membranes for filtering devices as a solution for providing water at lower energy costs. In this study, electrospun polyvinylidene fluoride membranes were fabricated by reinforcing 0.5 and 1 wt. % of chitin nanowhiskers in order to improve their thermal stability, mechanical properties, pure water flux and oil-water filtration performance for the possible application as filtration membranes. Morphological analysis revealed the porous and fibrous structure of membranes which confirmed by BET surface area analysis. Incorporation of chitin nanowhiskers improved the mechanical properties of the membranes such as elongation at break and tensile strength (specifically at 1 wt. % of chitin nanowhisker) while resulted in substantial enhancement of their thermal properties. Furthermore, polyvinylidene fluoride/chitin nanowhisker membranes showed enhanced oil-water separation ability, while reinforcement of chitin nanowhisker led to increase pure water flux rate, which measured as a crucial point in filtration membranes. The oil-water separation results compared with a commercial polyvinylidene fluoride membrane and the results signified the potential of electrospun polyvinylidene fluoride/chitin nanowhisker to be used for filtration application.
推动过滤技术革命的需求促使人们越来越关注电纺膜等先进功能材料，将其作为以较低能耗提供水的解决方案。在这项研究中，通过在聚偏氟乙烯中添加 0.5 和 1wt.%的壳聚糖纳米纤维来制备电纺膜，以提高其热稳定性、机械性能、纯水通量和油水过滤性能，以期将其用作过滤膜。形态分析显示了膜的多孔和纤维结构，这通过 BET 表面积分析得到了证实。壳聚糖纳米纤维的加入提高了膜的机械性能，如断裂伸长率和拉伸强度（特别是在添加 1wt.%壳聚糖纳米纤维时），同时也显著提高了膜的热性能。此外，聚偏氟乙烯/壳聚糖纳米纤维膜表现出增强的油水分离能力，而壳聚糖纳米纤维的增强则导致纯水通量的增加，这是过滤膜的一个关键测量点。油水分离结果与商业聚偏氟乙烯膜进行了比较，结果表明电纺聚偏氟乙烯/壳聚糖纳米纤维膜具有用于过滤应用的潜力。
