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A master's thesis from Aalborg University
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Thin anti-fouling film deposition on commercially available ceramic membrane filters

Translated title

Deponering af tynd anti-fouling film på kommercielt tilgængelige keramiske membranfiltre

Authors

;

Term

4. term

Education

Nanotechnology, Master

Publication year

2012

Submitted on

Abstract

Hensigten med dette speciale var at påføre en membranfilters overflade en belægning, der modvirker tilsmudsning (antifouling). For at mindske, at proteiner sætter sig fast på overfladen (proteinadsorption), blev polyethylenglykol (PEG) valgt som antifouling-materiale. Med afsæt i polymerkemi og tidligere arbejde af Khan m.fl. blev en overfladeinitieret, anionisk ringåbningspolymerisation af glycidol brugt til at vokse polymerlaget direkte på overfladen. Vækstproceduren blev først afprøvet på SiO2-overflader og blev derefter med succes overført til safirsubstrater og keramiske membranfilteroverflader. De antifouling-egenskaber blev testet ved dead-end-filtrering af proteiner og ved filtrering af simuleret søvand i en cross-flow-opsætning. I begge forsøg havde filtre med PEG-laget mindre tilsmudsning end ubehandlede referencefiltre.

The aim of this Master’s thesis was to apply an antifouling polymer film to the surface of membrane filters. To reduce protein adsorption (proteins sticking to the surface), polyethylene glycol (PEG) was chosen as the antifouling material. Guided by polymer chemistry and previous work by Khan et al., a surface-initiated, anionic, ring-opening polymerization of glycidol was used to grow the polymer layer directly from the surface. The growth procedure was first tested on SiO2 (silica) surfaces and then successfully transferred to sapphire substrates and ceramic membrane filter surfaces. Antifouling performance was evaluated in two setups: dead-end filtration with protein solutions, and cross-flow filtration with simulated lake water. In both cases, filters with the PEG layer showed less fouling than untreated reference filters.

[This abstract was generated with the help of AI]

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