A master thesis from Aalborg University
Thin anti-fouling film deposition on commercially available ceramic membrane filters
[Deponering af tynd anti-fouling film på kommercielt tilgængelige keramiske membranfiltre]
Author(s)
Term
4. term
Education
Publication year
2012
Submitted on
2012-05-31
Abstract
Det primære mål med dette afgangsprojekt har været at påføre en anti-fouling polymerfilm på overfladen af et membranfilter. Polyethylen glykol (PEG) blev valgt som anti-fouling materiale, hvilket var baseret på kriterier for at kunne modstå adsorption af proteiner. En overflade-initieret, anionisk, ring-åbnings polymerisering af glycidol blev valgt som polymeriseringsprocedure baseret på generel polymerkemi, samt artiklen af Khan m.fl. Polymeriseringsproceduren blev først afprøvet på SiO2 overflader og blev efterfølgende overført til safir substrater og membranfiltre med succes. Anti-fouling egenskaberne blev testet i blindgyde filtrering af proteinopløsninger, samt ved filtrering af kunstigt søvand i en tværstrøms opstilling. Det viste sig i begge eksperimentelle serier, at PEG filmen forbedrede anti-fouling egenskaberne af de behandlede filtre sammenlignet med referencefiltrene.
The main objective of this Master’s thesis has been to add an antifouling polymer film to a membrane filter surface. Based on the criteria for resisting protein adsorption polyethylene glycol (PEG) was chosen as antifouling material. Based on polymer chemistry and the work of Khan et al. a surface initiated, anionic, ringopening polymerisation of glycidol was chosen as polymerisation procedure. The polymer growth procedure was initially tested on SiO2 surfaces and was successfully transferred to sapphire substrates and ceramic membrane filter surfaces. The anti-fouling properties were tested in dead-end protein filtration and simulated lake water filtration in a cross-flow setup. In both experimental series the addition of the PEG layer improved the antifouling properties of the treated filters compared to plain reference filters.
Documents
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