Electrografting of mixed organophosphonic monolayers for SI-ATRP of 2-methacryloyloxyethyl phosphorylcholine / Bastien Arrotin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 4 (07/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 4 (07/2019) . - p. 1121-1132 Titre : Electrografting of mixed organophosphonic monolayers for SI-ATRP of 2-methacryloyloxyethyl phosphorylcholine Type de document : texte imprimé Auteurs : Bastien Arrotin, Auteur ; Jean-Marc Noël, Auteur ; Joseph Delhalle, Auteur ; Laetitia Mespouille, Auteur ; Zineb Mekhalif, Auteur Année de publication : 2019 Article en page(s) : p. 1121-1132 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alliages Greffage (chimie) Nitinol Le nickel-titane, connu aussi sous le nom de Nitinol est un alliage de nickel et de titane, dans lequel ces deux éléments sont approximativement présents dans les mêmes pourcentages. Poly(2-méthacryloyloxyéthyl phosphorylcholine) Polymérisation radicalaire par transfert d'atome Revêtement monocouche Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Nitinol (NiTi), one of the most important alloys for biomedical applications, is still hampered by its surface nickel inclusions, making it sensitive to pitting corrosion and leading therefore to the release of potentially carcinogenic Ni2+ ions. In this work, we assess the impact of the combination of electrografted mixed self-assembled monolayers (SAMs) on NiTi followed by a polymer coating formed by surface-initiated atom transfer radical polymerization (SI-ATRP). The molecular ratio of 11-(2-bromoisobutyrate)-undecyl-1-phosphonic acid (BUPA) to 11-decylphosphonic acid (C10P) on the electroassisted elaboration of the (BUPA/C10P)-NiTi-SAMs has been optimized. A small amount of BUPA (20%) appears to be the most promising condition, as it provides an efficient corrosion resistance and promotes the SI-ATRP of 2-methacryloyloxyethyl methacrylate (MPC). This confers to the surface hydrophilic properties and corrosion resistance close to those NiTi-SAMs when long polymerization times are used (≥ 6 h). Note de contenu : - EXPERIMENTAL SECTION : Chemicals - Nitinol substrates preparation - Electroassisted grafting of mixed initiating monolayers on nitinol - SI-ATRP of MPC - Substrate characterization - RESULTS AND DISCUSSION : Electroassisted grafting BUPA/C10P mixed monolayers - Surface-initiated atom transfer radical polymerization of 2-methacryloyloxyethyl phosphorylcholine on BUPA/C10P-NiTi DOI : 10.1007/s11998-019-00186-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00186-6.pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32867 [article]

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A facile technique for fabricating poly (2-methacryloyloxyethyl phosphorylcholine) coatings on titanium alloys / Chang Wu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 5 (09/2017) . - p. 1127-1135 Titre : A facile technique for fabricating poly (2-methacryloyloxyethyl phosphorylcholine) coatings on titanium alloys Type de document : texte imprimé Auteurs : Chang Wu, Auteur ; Weiyuan Chang, Auteur ; Hongzhao Qi, Auteur ; Lixia Long, Auteur ; Jin Zhao, Auteur ; Xubo Yuan, Auteur ; Zhaoyang Li, Auteur ; Xianjin Yang, Auteur Année de publication : 2017 Article en page(s) : p. 1127-1135 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Compatibilité chimique et physique Métaux -- Revêtements Poly(2-méthacryloyloxyéthyl phosphorylcholine) Polyaddition Polymères en médecine Revêtements antisalissures Titane Traîtements de surface Index. décimale : 667.9 Revêtements et enduits Résumé : Poly (2-methacryloyloxyethyl phosphorylcholine) (PMPC) has been widely used for surface modification of titanium (Ti) alloys to improve antifouling properties and blood compatibility. To achieve antifouling and anticoagulant capacities via a facile and efficient technique, PMPC coatings were covalently immobilized on a Ti surface simply by a sequential dip-coating method. The Ti surface was first dipped into hydrochloric acid (HCl) solution to remove surface contaminants and acquire a hydroxyl-enriched surface. Then, the surface was dipped into dopamine solution to acquire the surface bearing –NH2 groups. N-acryloxysuccinimide solution was used for introduction of double linkage which could graft with PMPC via in situ free-radical polymerization. Thus, the surface modification processes were under mild conditions and easy scale up. The obtained PMPC coatings endowed the Ti surface with smooth finish and relatively high packing density. Water contact angle measurements showed that the hydrophilicity of the Ti surface was markedly improved by coating PMPC with the water contact angle of 6.2°. Furthermore, the PMPC coatings could effectively resist protein adsorption and suppress platelet adhesion and activation. The facile and efficient method of immobilization of PMPC on a Ti surface could be promising for a variety of cardiovascular applications. Note de contenu : - MATERIALS AND METHODS : Materials - Coating preparation - Surface characterization - Blood compatibility of the coatings - RESULTS AND DISCUSSION : Surface characterization of coatings - Surface morphology and elemental analysis - Surface wettability - Protein adsorption - Platelet adhesion DOI : 10.1007/s11998-016-9900-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9900-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29147 [article]

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