期刊
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
卷 22, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/ijms22052290
关键词
films; hydrophilicity; surface morphology; cross-linking; permeate flux
资金
- Korea Atomic Energy Research Institute [523140-20]
- National Research Council of Science & Technology (NST), Republic of Korea [523140-20] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The synthesis and crosslinking of chitosan and polyethylene glycol membranes improved the thermal properties and antibacterial properties of the membranes, increased the hydrophilicity and water absorption, and enhanced flux and salt rejection values in permeation data.
Chitosan and polyethylene glycol (PEG-600) membranes were synthesized and crosslinked with 3-aminopropyltriethoxysilane (APTES). The main purpose of this research work is to synthesize RO membranes which can be used to provide desalinated water for drinking, industrial and agricultural purposes. Hydrogen bonding between chitosan and PEG was confirmed by displacement of the hydroxyl absorption peak at 3237 cm(-1) in pure chitosan to lower values in crosslinked membranes by using FTIR. Dynamic mechanical analysis revealed that PEG lowers Tg of the modified membranes vs. pure chitosan from 128.5 degrees C in control to 120 degrees C in CS-PEG5. SEM results highlighted porous and anisotropic structure of crosslinked membranes. As the amount of PEG was increased, hydrophilicity of membranes was increased and water absorption increased up to a maximum of 67.34%. Permeation data showed that flux and salt rejection value of the modified membranes was increased up to a maximum of 80% and 40.4%, respectively. Modified films have antibacterial properties against Escherichia coli as compared to control membranes.
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