Ultra-high flux alkali-treated cellulose triacetate/cellulose nanocrystal nanocomposite membrane for pervaporation desalination
(2020) Chemical Engineering Science — Vol. on line, p. 116276 (2020)
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- Authors
Prihatiningtyas, Indah 
Hartanto, Yusak Van der Bruggen, Bart
- Abstract
- Cellulose triacetate/cellulose nanocrystals (CTA/CNCs) nanocomposite has recently been proposed as a promising material to synthesize pervaporation desalination membrane. However, the water flux of such membranes was found poor in comparison to other pervaporation desalination membranes. In this work, time-controlled alkaline treatment is proposed to improve the water flux of CTA/CNCs nanocomposite film membrane without compromising its selectivity. An understanding how alkaline treatment changed the physicochemical properties of the film membranes was obtained through film membrane characterization by FTIR spectroscopy, X-ray diffraction, scanning electron microscopy (SEM), contact angle and water uptake analysis. The film membrane being treated up to 30 minutes results in a drastic water flux improvement to 107.5 kg.m-2.h-1 with >99.8% salt rejection in comparison with the water flux obtained by the untreated film membrane, 3.6 kg.m-2.h-1, when hypersaline water with 90 g/L NaCl was employed as the feed solution. The water flux decreased to 58.5 kg.m-2.h-1 when 200 g/L NaCl was used as feed solution. The alkali-treated film membrane showed a stable film membrane performance for 12 hours when it was evaluated for 90 g/L and 200 g/L NaCl.
- Affiliations
KU Leuven Department of Chemical Engineering Mulawarman University Department of Chemical Engineering Tshwane University of Technology Faculty of Engineering and the Built Environment
Citations
Prihatiningtyas, I., Hartanto, Y., & Van der Bruggen, B. (2020). Ultra-high flux alkali-treated cellulose triacetate/cellulose nanocrystal nanocomposite membrane for pervaporation desalination. Chemical Engineering Science, on line, 116276. https://doi.org/10.1016/j.ces.2020.116276 (Original work published 2020)