Surface modification by physical treatments on biomedical grade metals to improve adhesion for bonding hybrid non-isocyanate urethanes

Autor(es)

Rossi de Aguiar, K. M. F. ^[1] ; Specht, U. ^[2] ; Maass, J. F. ^[3] ; Salz, D. ^[2] ; Picon, C. A. ^[4] ; Noeske, P. -L. M. ^[2] ; Rischka, K. ^[2] ; Rodrigues-Filho, U. P. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Chem Sao Carlos, BR-13563120 Sao Carlos, SP - Brazil

^[2] Fraunhofer Inst Mfg Technol & Adv Mat IFAM, D-28359 Bremen - Germany

^[3] Pontif Catholic Univ Rio Grande do Sul, BR-90619900 Porto Alegre, RS - Brazil

^[4] State Univ Julio de Mesquita Filho, Fac Engn, BR-15385000 Ilha Solteira, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: RSC ADVANCES; v. 6, n. 53, p. 47203-47211, 2016.
• Citações Web of Science: 8

Resumo

This work aims to improve the adhesion of a hybrid non-isocyanate polydimethylsiloxane urethane (PDMSUr) coating by producing active layers on titanium alloy (Ti6Al4V) and stainless steel (SS316L) applying pulsed Nd:YAG laser and oxygen plasma. The PDMSUr is a hybrid adhesive and, when functionalized with alkoxysilane groups, can bind onto the interfacial hydroxyl groups of a (hydr)oxide/carbonate layer by sol-gel reactions. These reactions are acid catalysed and the silanol groups can bind through Si-O-metal links. The pull-off-strength of such sustainable coatings raised more than 100% for both substrates after the physical treatments, compared with the substrates etched. X-ray Photoelectron Spectroscopy (XPS) of a freshly pre-treated substrate revealed the formation of thin oxide-based reactive layers on the surface of Ti6Al4V and SS316L after the surface treatments. Both physical procedures were efficient to create oxide layers on top of metallic substrates and contributed to the improvement of adhesion strength of PDMSUr on biomedical grade metals. (AU)

• Processo FAPESP: 13/05279-3 - Adesivos biomiméticos baseados em uretanas derivadas de poli(dimetilsiloxano) utilizando fixação de CO2
• Beneficiário: Kelen Menezes Flores Rossi de Aguiar
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 11/08120-0 - Filmes nanoestruturados: impacto da arquitetura dos filmes contendo nanopartículas e fosfotungstato sobre as propriedades fotoativas
• Beneficiário: Ubirajara Pereira Rodrigues Filho
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 11/06019-0 - Fixação de CO2 e síntese de co-polímeros de poliuretana e polisilicona incorporado em ormosils: utilização como filmes bioativos e sistemas condutores iônicos
• Beneficiário: Kelen Menezes Flores Rossi de Aguiar
• Modalidade de apoio: Bolsas no Brasil - Doutorado