Formation of a thick aromatic polyamide membrane by interfacial polymerisation
Lee, J, Hill, A and Kentish, S (2013) Formation of a thick aromatic polyamide membrane by interfacial polymerisation Separation and Purification Technology, 104. pp. 276-283.
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Thin film composite membranes (TFCs) consist of a thin film of polymer that is responsible for high salt rejection. This layer is made via interfacial polymerisation of two monomers 1,3 phenylene diamine and trimesoyl chloride, with the membrane reported to reach a self limiting thickness of less than 200 nm. This paper reports for the first time the formation of thick free-standing aromatic polyamide membranes of greater than 50 μm in thickness via the well-known interfacial polymerisation technique. The membrane thickness as a function of polymerisation time and monomer concentration was investigated. The polyamide layer formed through interfacial polymerisation is not necessarily homogeneous, but can indeed feature areas of porosity. A mechanism for such a porous structure is proposed and discussed. The ability to form thick free-standing polyamide membranes allows bulk polymer properties to be evaluated for the first time. In particular, in this work we are able to measure the zeta potential of the membrane surface that usually faces the membrane support. We show that this surface is still negatively charged for all pH values above 4.0.
|Subjects :||Chemical and Process Engineering|
|Divisions :||Faculty of Engineering and Physical Sciences > Chemical and Process Engineering|
|Date :||5 February 2013|
|Identification Number :||10.1016/j.seppur.2012.11.015|
|Copyright Disclaimer :||Copyright © 2012 Elsevier Ltd.|
|Uncontrolled Keywords :||Science & Technology, Technology, Engineering, Chemical, Engineering, ENGINEERING, CHEMICAL, Reverse osmosis, Nanofiltration, Interfacial polymerisation, Porosity, REVERSE-OSMOSIS MEMBRANES, ATOMIC-FORCE MICROSCOPY, FILM COMPOSITE MEMBRANES, MATHEMATICAL-MODEL, PERFORMANCE, POLYCONDENSATION, NANOFILTRATION|
|Related URLs :|
|Additional Information :||Item not available from this repository|
|Depositing User :||Symplectic Elements|
|Date Deposited :||19 Jul 2016 14:57|
|Last Modified :||19 Jul 2016 14:57|
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