| Summary: | 碩士 === 國立臺灣科技大學 === 化學工程系 === 99 === The aims of this study were to improve the adhesion between heat-polymerization denture based material (Luctione 199) and heat-curing soft lining (Molloplast B) and to incorporate anti-fouling properties on the denture based surfaces. The most essential issues for denture materials are the bonding between denture based material and soft lining, and the formation of biofilm from microorganisms in oral. In this study, surface modification methods were used including plasma treatments, polydopamine coating, and polyethylene glycol (PEG) coating. Oxygen was chosen as a plasma gas for introduction of oxygen containing functional groups to increase the surface wettability which facilitated the following adsorption of polydopamine. PEG with elastic repeated unit which repels bimolecular was used as the antifouling polymer. In this study, PEG coating on polydopamine attached surface revealed higher antifouling effects in comparison with the surfaces without the polydopamine coating.
For tensile strength tests, the surfaces treated with oxygen plasma for longer period revealed 20.4 % improvement on the tensile strength. The polydopamine coating further increased the tensile strength 26.5 % in comparing with the pristine sample. The incorporation of PEG showed effects on inhiniting the adhesion of L-929 fibroblasts. Both increase the amount of PEG and the addition of crosslinker assisted the increase of anti-fouling effects up to 47.8 %. Finally, the chemical grafting of PEG on denture based material showed the highest antifouling efficiency with 60.9 %.
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