膜科学与技术

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Preparation and Performance of TFC-FO membranes prepared on different support layers

Authors： HU Lele, WANG Duo，WANG Meng

Units： (College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China)

KeyWords： Forward osmosis membrane；TFC membrane；substrate；structural parameter

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2017,37(2):19-25

Abstract：

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The structural parameter of the membrane is an important standard to measure the internal concentration polarization in forward osmosis process. In this paper, the impacts of different substrates on the porous structure of the polysulfone support layer and the performance of TFC-FO membranes formed on different support layers were investigated. Results showed that the hydrophilicity and the porous structure of the substrate are two important factors which influence the structure of the polysulfone support layer. Further more, the porous substrate exhibits better performance in improving the bottom surface porosity and the permeability of finger-like pore in the middle. The FO Membrane prepared on the support layer, which is cast on the porous substrate, shows an excellent flux of 38.6 L?m-2?h-1 and a reverse salt flux of 8.0 g?m-2?h-1 under FO mode for 1mol?L-1 NaCl draw solution from a de-ionized water feed solution. Compared with the traditional TFC-FO membrane when glass plate is used as the casting substrate, the structural parameter (S) of the membrane decreased from 386.0μm to 172.5μm.

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