Journal
CARBOHYDRATE POLYMERS
Volume 181, Issue -, Pages 1102-1111Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2017.11.036
Keywords
Cellulose triacetate; Reverse osmosis; Quaternary ammonium; Antibacterial
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Funding
- National Basic Research Program of China [2014CB660813]
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A novel procedure to fabricate quaternized cellulose triacetate reverse osmosis (QCTA-RO) membranes via the etherification procedure between partially hydrolyzed CTA-RO membrane and 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride (CHPTAC) in alkaline solutions (pH = 9-11) for different reaction time (1, 2, 3 and 4 h) was proposed. The structure and performances of the obtained QCTA-RO membranes were characterized and their antibacterial performances against E. coli and S. aureus were evaluated through colony counting method. The results showed that quaternary amine group was successfully grafted on the surface of membrane via covalently bond without significant damage to morphology, mechanical performance and thermal stability. The permeation flux values increased with prolonging modification time to 3 h, while the salt rejection decreased slightly but remained above 92%. QCTA-RO membranes displayed good antibacterial activity against Gram-negative E. coli and Gram-positive S. aureus and their bactericidal rates were 78.7-89.0% and 64.7-76.6% respectively at the optimized modification time of 2-3 h.
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