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Crosslinked PVA-PS thin-film composite membrane for reverse osmosis

✍ Scribed by She Jian; Shen Xiao Ming

Publisher: Elsevier Science
Year: 1987
Tongue: English
Weight: 371 KB
Volume: 62
Category: Article
ISSN: 0011-9164
DOI: 10.1016/0011-9164(87)87040-6

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✦ Synopsis

With bicarboxylic acids as crosslinking agents and H,SO, as catalyst, polyvinyl alcohol (PVA) was crosslinked in the temperature range of 90-12O"C, resulting in thin-film composite membranes with polysulphone as substrate.

IR analysis showed that crosslinking changes the chemical structure of PVA, involving HzS04 in the reaction. Besides oxalic acid, other bicarboxylic acids, such as malonic acid, succinic acid and citric acid can also crosslink PVA in the temperature range given above. RO tests showed that the salt rejection of membranes using oxalic acid as crosslinking agent was higher than that of membranes using other bicarboxylic acids.

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