A new method to determine the skin thickness of asymmetric UF-membranes using colloidal gold particles

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Cuperus, Folkert Petrus and Bargeman, Derk and Smolders, Kees (1990) A new method to determine the skin thickness of asymmetric UF-membranes using colloidal gold particles. Journal of Colloid and Interface Science, 135 (2). pp. 486-495. ISSN 0021-9797

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Abstract:In this paper a new method is presented for the determination of the skin thickness of asymmetric ultrafiltration membranes. The method is based on the use of well-defined, uniformly sized colloidal gold particles, permeated from the sublayer side of the membrane, combined with electron microscopic analysis of the membrane afterward. Using this method poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) and polysulfone (PSf) membranes were investigated. PPO membranes appeared to have a well-defined skin layer with a thickness of about 0.2 μm and a pore size distinctly different from that in the macroporous layer underneath. In the case of PSf such a distinct skin layer cannot be defined. The size of the pores in these membranes gradually increases from skin to sublayer.
Item Type:Article
Copyright:© 1990 Elsevier
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Link to this item:http://purl.utwente.nl/publications/70676
Official URL:http://dx.doi.org/10.1016/0021-9797(90)90019-K
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