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Thin‐film composite forward osmosis membrane prepared from polyvinyl chloride/cellulose carbamate substrate and its potential application in brackish water desalination
Author(s) -
Zheng Ke,
Zhou Shaoqi,
Cheng Zuqin,
Huang Guoru
Publication year - 2021
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.49939
Subject(s) - chemical engineering , membrane , materials science , cellulose , thin film composite membrane , forward osmosis , desalination , polyvinyl chloride , carbamate , composite material , reverse osmosis , chemistry , organic chemistry , biochemistry , engineering
Synthesized by the reaction between α‐cellulose and m‐tolyl isocyanate (MTI), cellulose carbamate (CC) was blended with polyvinyl chloride (PVC) to fabricate substrates for thin‐film composite (TFC) forward osmosis (FO) membranes. The introduction of CC into substrates improved both membrane structure and performance. The substrates exhibited higher porosity and hydrophilicity, and better connective pore structure; while rejection layer exhibited better morphology but limited cross‐linked degree decrease after the introduction of CC. According to the results, the CC blend ratio of 10% was the optimal ratio. With this blend ratio, the TFC‐10 membrane presented favorable water permeability (1.86 LMH/bar) and structure parameter (337 μm), which resulted in excellent FO performance (water flux with a value of 40.40 LMH and specific salt flux with a value of 0.099 g/L under rejection layer faces draw solution [DS] mode when 1 M NaCl and deionized water were utilized as DS and feed solution). In addition, the TFC‐10 membrane showed good water flux and low‐sulfate ion leakage in the potential application of brackish water desalination.