Stability of PMMA-grafted/Ti hybrid biomaterial interface in corrosive media

The stability of interfaces between polymethyl methacrylate (PMMA) and titanium (Ti) are tested in a Ringer solution that is an aggressive medium usually used for biomaterial evaluation. The devices are PMMA-grafted/Ti elaborated via a “grafting-from” method involving three steps, the alkali activat...

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Bibliographic Details
Published inPure and applied chemistry Vol. 91; no. 10; pp. 1617 - 1629
Main Authors Schott, Tiphaine, Liautaud, Françoise, Kriegel, Sebastien, Faerber, Jacques, He, Wenjia, Masson, Patrick, Pourroy, Geneviève, Carradò, Adele
Format Journal Article
LanguageEnglish
Published Berlin De Gruyter 25.10.2019
Walter de Gruyter GmbH
Subjects
biocompatibility
Biomedical materials
Calomel electrode
Chemical Sciences
corrosion
Eurasia 2018
Grafting
grafting from
inflammatory conditions
interface
Interface stability
Interfaces
Localized corrosion
Phosphonates
PMMA
Polymethyl methacrylate
protective film
sandwich
Spin coating
Titanium
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Summary:The stability of interfaces between polymethyl methacrylate (PMMA) and titanium (Ti) are tested in a Ringer solution that is an aggressive medium usually used for biomaterial evaluation. The devices are PMMA-grafted/Ti elaborated via a “grafting-from” method involving three steps, the alkali activation of Ti sheets, their functionalization with an initiator of polymerization through a phosphonate anchoring group and the growth of PMMA brushes. Electrochemical characterizations demonstrate that the stability of the PMMA-grafted/Ti interface in biological medium is satisfactory and that the grafting of PMMA is even acting as a protective barrier for titanium. Indeed, PMMA-grafted/Ti remains passive in Ringer solution until at least +3 V/SCE (saturated calomel electrode), even under inflammatory conditions, while localized corrosion was measured on as-received titanium in similar conditions. This protecting role is attributed to the grafted interface, since spin-coated PMMA does not decrease the corrosion sensitivity of titanium.
ISSN:0033-4545
1365-3075
DOI:10.1515/pac-2018-1218