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Effects of the morphology of sulfobetaine zwitterionic layers grafted onto a silicone surface on improving the hydrophilic stability, anti-bacterial adhesion properties, and biocompatibility

Though silicone rubber has been used in the biomedical field, its inherent hydrophobic nature and “hydrophobic recovery” limit its wide application. In this article, cross-linked and comb-like sulfobetaine zwitterionic layers were covalently grafted onto the surface of a silicone film (SF) by ultrav... Full description

Contained in: Journal of Applied Polymer Science Vol. 135, No. 44 (2018), p. 46860/1-9
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Links: Additional Link (dx.doi.org)
ISSN: 1097-4628
Additional Keywords: ADHAESION
ANTIBAKTERIELLE-EIGENSCHAFT
BAKTERIEN
BIOVERTRAEGLICHKEIT
HYDROPHILE-GRUPPE
SILICON:POLYMER
SILICONKAUTSCHUK
SULFOBETAIN
ULTRAVIOLETTBESTRAHLUNG
VAKUUM
WASSERDURCHLAESSIGE-EIGENSCHAFT
DOI: 10.1002/app.46860
Notes: Copyright: Metadaten: TEMA, Copyright WTI-Frankfurt-digital GmbH
Copyright: (C) Alle Rechte beim Herausgeber
Physical Description: 9 Seiten, 8 Bilder, 1 Tabelle
ID (e.g. DOI, URN): 10.1002/app.46860
PPN (Catalogue-ID): WTI06177264X
Note: WTI TEMA DB
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520 |a Though silicone rubber has been used in the biomedical field, its inherent hydrophobic nature and “hydrophobic recovery” limit its wide application. In this article, cross-linked and comb-like sulfobetaine zwitterionic layers were covalently grafted onto the surface of a silicone film (SF) by ultraviolet (UV) curing in the presence and absence of cross-linking agent, respectively, after the surface was pretreated under high-energy vacuum ultraviolet (VUV) irradiation. Comparative studies were carried out to investigate the effects of the grafting layers on the surface properties, hydrophilic stability, anti-bacterial adhesion property, and cytocompatibility. The results showed that VUV-UV irradiation is an efficient modification method for introducing hydrophilic groups onto SF surface. The covalently linked zwitterions endowed the silicone surface with good hydrophilicity, a better reduction in the adhesion of bacteria relative to the properties of a pristine silicone surface. The cross-linked layer exhibited better hydrophilic stability, anti-bacterial adhesion properties and biocompatibility due to better coverage of the surface than the comb-like layer. The improvement in these properties provides the potential for the extensive application of modified silicone films in silastic implants and medical dressings. [Copyright John Wiley & Sons. Reproduced with permission.] 
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