Increased hydrophilicity and anti-fouling effect of orthokeratology lenses coated with NVP and PEGMA by plasma-enhanced chemical vapor deposition / Tsung-Jen Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 737-745 Titre : Increased hydrophilicity and anti-fouling effect of orthokeratology lenses coated with NVP and PEGMA by plasma-enhanced chemical vapor deposition Type de document : texte imprimé Auteurs : Tsung-Jen Wang, Auteur ; Wen-Pin Lin, Auteur ; Siao-Pei Guo, Auteur Année de publication : 2024 Article en page(s) : p. 737-745 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dépôt chimique en phase vapeur Hydrophilie Lentilles (optique) Matériaux -- Propriétés antisalissures Polyéthylène greffé anhydride maléique Revêtements organiques Technique des plasmas Index. décimale : 667.9 Revêtements et enduits Résumé : Plasma-enhanced chemical vapor deposition (PECVD) is a vacuum plasma treatment procedure for the deposition of thin film on a substance, which was first used on orthokeratology lenses (ortho-k lenses) in order to coat polymerized 1-vinyl-2-pyrrolidinone (NVP) and poly(ethylene glycol) methacrylate (PEGMA) on the lenses. First, the surface of ortho-k lenses was pretreated with electrons, radicals, and peroxides for 9 min, under 9 sccm Ar, 36 sccm O2, and 120 W of applied radio frequency (RF) power. NVP and PEGMA were deposited on the surface of lenses through the heating of NVP to 50°C and PEGMA to 43°C. The chamber pressure was maintained at 300 mTorr, with 40 W of applied RF power, 12 sccm Ar, and an 8-cm treatment distance. Obviously decreased water contact angle of NVP/PEGMA-coated lenses exhibited excellent hydrophilicity, which lasted for up to 90 days, and significant lower protein adsorption was observed on NVP/PEGMA-coated lenses. Besides, the MTT assay revealed the great biocompatibility of the coated lenses. Therefore, our results showed that PECVD can be used to prepare NVP/PEGMA-coated ortho-k lenses with excellent long-lasting hydrophilicity and anti-fouling effect. Note de contenu : - MATERIALS AND METHODS : Materials - Self-conducted chamber for PECDV treatment - Hydrophilicity of NVP/PEGMA-coated lenses - Surface characteristics - Light transmittance - Protein adsorption and antibacterial properties - Cytotoxicity - RESULTS AND DISCUSSION : Hydrophilicity and stability of NVP/PEGMA-coated ortho-k lenses - Surface characteristics - Light transmittance - Protein adsorption and antibacterial properties - Cytotoxicity DOI : https://doi.org/10.1007/s11998-023-0000853-9 En ligne : https://drive.google.com/file/d/1oVTQXJPoPX4TVmtPceINDPe4DMIemTx_/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40788 [article]

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