Department of Chemical Engineering, Kermanshah University of Technology, 67156 Kermanshah, Iran.
Department of Chemical Engineering, Kermanshah University of Technology, 67156 Kermanshah, Iran.
Carbohydr Polym. 2019 Jan 15;204:78-88. doi: 10.1016/j.carbpol.2018.10.005. Epub 2018 Oct 3.
Chitosan nano-biopolymers (CS-NPs) were synthesized, and nanocomposite membranes were prepared via phase inversion method. The synthesized CS-NPs and fabricated membranes were characterized using TEM, SEM, AFM, hydrophilicity analysis and porosity measurement techniques. Surface hydrophilicity and porosity of nanocomposite membranes considerably increased compared with pristine CA membrane, and structural parameter significantly decreased to 0.30-1.3 mm. Nanocomposite membranes presented superior forward osmosis (FO) performance by offering a high water flux and low reverse solute flux compared with CA so that optimum osmotic water flux reached 31.2 LMH, about four times higher than that of unmodified membrane. In this regard, reverse salt flux remarkably reduced from 2.33 gMH for pristine membrane to 0.09 gMH for nanocomposite membrane demonstrating efficacy of employed modification method in simultaneous improvement of both water and reverse salt flux. Nanocomposite membrane applicability was also investigated in desalination of seawater proving the satisfactory performance of membranes in FO.
壳聚糖纳米生物聚合物（CS-NPs）被合成，并通过相转化法制备纳米复合膜。通过 TEM、SEM、AFM、亲水性分析和孔隙率测量技术对合成的 CS-NPs 和制备的膜进行了表征。与原始 CA 膜相比，纳米复合膜的表面亲水性和孔隙率显著增加，而结构参数显著降低至 0.30-1.3mm。纳米复合膜通过提供高水通量和低反向溶质通量，表现出优异的正向渗透（FO）性能，与 CA 相比，最佳渗透水通量达到 31.2LMH，约为未改性膜的四倍。在这方面，反向盐通量从原始膜的 2.33gMH 显著降低到纳米复合膜的 0.09gMH，证明了所采用的改性方法在同时提高水和反向盐通量方面的有效性。还研究了纳米复合膜在海水淡化中的应用，证明了膜在 FO 中的良好性能。
