Synthesis and Characterization of CTA/CA-Based Forward Osmosis Membranes with Hydrophilic Nano-Titanium Dioxide

Abstract:

In this paper, a novel nanocomposite forward osmosis membrane (nTiO₂-CTA/CA) was fabricated by introducing nanotitaniumdi oxide (nTiO₂) into the cellulose triacetate/cellulose acetate (CTA/CA)-based casting solution using phase inversion methods. Casting composite and preparation--nTiO₂ content, blend temperature and coagulating bath temperature--were tested for their effects on pure water flux and salt rejection of membranes. Results revealed that the FO membrane prepared under optimized composition showed excellent desalination performance (high water flux = 5.38 L/m²·h and salt rejection > 97 %). Moreover, SEM images showed that addition of nTiO₂ resulted in nanocomposite forward osmosis membrane with a smoother surface. The contact angle of the membranes decreased from 76o to 51° with increase nTiO₂ concentration from 0% to 0.10%.

• Periodical: Materials Science Forum (Volume 867)
• Pages: 127-131
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.867.127
• Online since: August 2016
• Authors: Xiu Ju Wang*, Xin Lian Shi, Shu Fang Hou, Jian Hua Yang, Kai Li Zhou, Zhong Peng Wang, Li Guo Wang
• Keywords: Forward Osmosis, Hydrophilic, Membrane, Nano-Titanium Dioxide

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