三醋酸纤维素纳米纤维膜的制备及其油水分离应用

发布时间：2018-03-05 00:23

  本文选题：热致相分离　切入点：三醋酸纤维素　出处：《应用化学》2017年05期 　论文类型：期刊论文

【摘要】：石油开采和油船运输泄露的油污污染日益突出,使得质轻、亲水疏油的油水分离材料得到广泛关注。本文在无任何添加剂条件下,以三醋酸纤维素(TCA)/N,N-二甲基乙酰胺(DMAc)溶液通过热致相分离(TIPS)制备TCA纳米纤维膜。研究了淬火时间、温度和聚合物浓度等条件对TCA纳米纤维膜形貌的影响。TCA纳米纤维膜的形貌、孔隙率和比表面积通过SEM、乙醇法和N2吸脱附表征。实验结果表明,最佳实验条件为:淬火时间180 min、淬火温度-20℃、聚合物质量分数5%,得到直径为(110±28)nm均匀纤维膜。与块状TCA流延膜相比,TCA纳米纤维膜的高孔隙率和大比表面积以及表面特殊的微/纳结构,使其水接触角由86.2°增加到137.5°。由于高疏水性和亲油性以及强烈的毛细作用,TCA纳米纤维膜的吸油容量达到21.5 g/g,分别是流延膜的20~42倍,且可快速吸收油水混合物中的油层。TCA纳米纤维膜是一种可生物降解的溢油污染清洁材料。
[Abstract]:The oil pollution caused by oil exploitation and oil tanker transportation is becoming more and more prominent, which makes the oil-water separation materials with light weight and hydrophilic and thinning oil widely concerned. In this paper, without any additives, the oil and water separation materials are widely concerned. The TCA nanofiber films were prepared by thermo-induced phase separation of TCA nanofibers in TCA / Na-dimethylacetamide (DMAC) solution. The effects of quenching time, temperature and polymer concentration on the morphology of TCA nanofibers were studied. The porosity and specific surface area are desorbed by SEM, ethanol and N2. The experimental results show that the optimum experimental conditions are as follows: quenching time 180 min, quenching temperature -20 鈩，

本文编号：1567962