Thermal annealing effect on cellulose acetate reverse osmosis membrane structure

Thermal annealing effect on cellulose acetate reverse osmosis membrane structure

The structure variation of cellulose acetate (CA) reverse osmosis (RO) membranes due to thermal annealing was investigated by using gas adsorption. When the CA membranes were dehydrated by freeze-drying, the morphology of the unannealed membrane was similar to that of the annealed membrane. On the c...

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Veröffentlicht in:Desalination 1995, Vol.101 (2), p.195-200
Hauptverfasser: Han, Myeong-Jin, Bhattacharyya, Dibakar
Format: Artikel
Sprache:eng
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Applied sciences
Chemical engineering
Exact sciences and technology
Marine
Membrane separation (reverse osmosis, dialysis...)
Reverse osmosis
Thermal annealing
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container_title Desalination
container_volume 101
creator Han, Myeong-Jin
Bhattacharyya, Dibakar
description The structure variation of cellulose acetate (CA) reverse osmosis (RO) membranes due to thermal annealing was investigated by using gas adsorption. When the CA membranes were dehydrated by freeze-drying, the morphology of the unannealed membrane was similar to that of the annealed membrane. On the contrary, with air-drying which induced structure collapse of the CA membranes, gas adsorption behavior of the unannealed membrane showed a significant difference from that of the annealed membrane. The CA RO membrane in an unannealed state totally collapsed during air-drying, but the membrane that was annealed for 10 min at 90°C showed significantly reduced collapsing compared to the unannealed one. However, even though the CA membranes were annealed, use of methanol as the wetting agent caused complete collapsing during air-drying.
doi_str_mv 10.1016/0011-9164(95)00022-T
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subjects Applied sciences
Chemical engineering
Exact sciences and technology
Marine
Membrane separation (reverse osmosis, dialysis...)
Reverse osmosis
Thermal annealing
title Thermal annealing effect on cellulose acetate reverse osmosis membrane structure
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