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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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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]
Total Authors: 8
[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
Total Affiliations: 4
Document type: Journal article
Source: RSC ADVANCES; v. 6, n. 53, p. 47203-47211, 2016.
Web of Science Citations: 8

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)

FAPESP's process: 11/08120-0 - Nanostructured films: on the influence of the architecture on Photoactivity properties of films with phosphotungstate and nanoparticles
Grantee:Ubirajara Pereira Rodrigues Filho
Support type: Regular Research Grants
FAPESP's process: 13/05279-3 - Poly(dimethylsiloxane) based segmented urethanes biomimetic adhesives Based on CO2 fixation
Grantee:Kelen Menezes Flores Rossi de Aguiar
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 11/06019-0 - CO2 uptake and synthesis of POLYURETANES-POLYSILICONE co-polymers as additives incorporated in ormosils: use on bioactive and ion conducting films
Grantee:Kelen Menezes Flores Rossi de Aguiar
Support type: Scholarships in Brazil - Doctorate