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Synthesis and investigation of desalinating, antibacterial, and mechanical properties of tetraethylorthosilicate crosslinked chitosan/polyethylene glycol (PEG‐300) membranes for reverse osmosis
Author(s) -
Raza Arsalan,
Kayani Anum,
Sabir Aneela,
Ahmad Adnan,
Hussain Tajamal,
Raza Muhammad Hamid,
Bano Shehr,
Islam Atif,
Khan Rafi Ullah
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.48870
Subject(s) - membrane , polyethylene glycol , peg ratio , permeation , chitosan , chemical engineering , materials science , polymer chemistry , fourier transform infrared spectroscopy , chromatography , reverse osmosis , forward osmosis , nuclear chemistry , chemistry , organic chemistry , biochemistry , finance , engineering , economics
ABSTRACT Solution casting method was used to synthesize chitosan (CS)‐based membranes for reverse osmosis (RO) using PEG‐300 and tetraethylorthosilicate as a crosslinker. Their salt rejection (%) and permeate flux (mL/h.m 2 ) was measured by using lab scale RO plant. FTIR spectroscopy reveals interactions between CS and PEG by shifting of OH peak from 3237 cm −1 to lower wavenumber in modified membranes. SEM results showed pores in modified membranes while pure CS membranes had uniform nonporous and dense microstructure. DMA results demonstrated that the addition of PEG lowers the T g value up to 6.5%. Water content of membranes increases up to 82.63% as the amount of PEG increases owing to its hydrophilic nature. The bacterial killing ability showed that the modified membranes possess good antibacterial activity against Escherichia coli in comparison to the control film. The permeation results revealed that salt rejection and flux of the modified membranes increased up 60% and 86.36 mL/h.m 2 , respectively. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48870.