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Tailoring nanocomposite membranes of cellulose acetate/silica nanoparticles for desalination
Journal of Materiomics ( IF 9.4 ) Pub Date : 2022-07-16 , DOI: 10.1016/j.jmat.2022.07.001
Amira S. Mohammed Ali , Moataz M. Soliman , Sherif H. Kandil , Shaker Ebrahim , Marwa Khalil

Herein, the fabrication of cellulose acetate (CA) silica-based nanocomposite membranes via the dry-wet phase inversion procedure for water desalination was investigated. The modified and unmodified silica nanoparticles (MSNPs and SNPs) were prepared by the sol-gel technique. The effect of the SNPs and MSNPs was investigated on the CA membrane's properties and their performance for water desalination. The CA nanocomposite membranes were characterized to study their structure, hydrophilicity, and morphology. The fabricated nanocomposite membranes showed hydrophilic surface properties. The performance of reverse osmosis (RO) membranes was measured using a crossflow RO unit at 10 bar (1 bar = 0.1 MPa). The membrane with 10 mg of SNPs enhanced permeate water flux compared to the pristine CA membrane by 1.6 L/(m2·h). The effect of MSNPs on the nanocomposites' performance was lower than their counterpart in the case of adding SNPs. The membrane with 30 mg of MSNPs showed the highest permeate water flux among other nanocomposite membranes with a value of 35.7 L/(m2·h) at 24 bar.



中文翻译:

定制用于脱盐的醋酸纤维素/二氧化硅纳米粒子的纳米复合膜

在此,研究了通过干湿相转化法制备用于海水淡化的醋酸纤维素 (CA) 二氧化硅基纳米复合膜。通过溶胶-凝胶技术制备改性和未改性的二氧化硅纳米粒子(MSNPs 和 SNPs)。研究了 SNP 和 MSNP 对 CA 膜的性质及其对水脱盐的性能的影响。对 CA 纳米复合膜进行了表征,以研究它们的结构、亲水性和形态。制备的纳米复合膜显示出亲水性表面特性。使用交叉流 RO 装置在 10 bar(1 bar = 0.1 MPa)下测量反渗透 (RO) 膜的性能。与原始 CA 膜相比,具有 10 mg SNPs 的膜将渗透水通量提高了 1.6 L/(m2 ·h)。在添加 SNP 的情况下,MSNP 对纳米复合材料性能的影响低于其对应物。在其他纳米复合膜中,含有 30 mg MSNPs 的膜在 24 bar 时的渗透水通量为 35.7 L/(m 2 ·h)。

更新日期:2022-07-16
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