authors |
Romero-Gavilan, F; Carlos-Almeida, J; Cerqueira, A; Gurruchaga, M; Goni, I; Miranda-Salvado, IM; Fernandes, MHV; Suay, J |
nationality |
International |
journal |
PROGRESS IN ORGANIC COATINGS |
author keywords |
Hybrid sol-gel; Biomaterials; Alkoxysilane; Metal prosthesis; Corrosion resistance; Coating |
keywords |
HYBRID MATERIALS; FT-IR; IMPLANTS; TITANIUM; HYDROLYSIS; WETTABILITY; DEGRADATION; SILOXANE |
abstract |
The reported osteogenic properties of the hybrid silica sol-gel materials make these compositions perfect candidates for bone tissue engineering applications. The aim of this study was the synthesis and characterisation of hybrid silica coatings, obtained using mixtures of tetraethyl orthosilicate (TEOS) and three different methyl-modified alkoxysilanes: trimethoxymethylsilane (MTMS), dimethyldiethoxysilane (DMDES) or polydimethylsiloxane (PDMS). A comparison of the properties of these materials can reveal the best candidate for the coatings on metallic prostheses. After optimising the synthesis parameters, the developed coatings were characterised using Fourier transform infrared spectrometry (FT-IR), H-1 and Si-29 solid-state nuclear magnetic resonance (H-1-NMR and Si-29-MNR), cross-cut tests, scanning electron microscopy (SEM), contact angle measurements, optical profilometry, hydrolytic degradation tests and electrochemical corrosion analysis. Homogeneous and well-adhering coatings were obtained using the three methyl-modified reagents. However, different degrees of protection against corrosion, different hydrophilicity and varying degradation kinetics were observed for different precursors. The MTMS-based coating showed the highest hydrophilicity and degradation kinetics; these properties can be associated with increased bioactivity (Si release). In contrast, the PDMS and DMDES-based coatings showed augmented resistance to corrosion and lower permeability to water and, consequently, improved protection of metallic surfaces. From the physicochemical point of view, all these materials displayed interesting characteristics, relevant for coatings to be used in biomedical applications. |
publisher |
ELSEVIER SCIENCE SA |
issn |
0300-9440 |
isbn |
1873-331X |
year published |
2020 |
volume |
147 |
digital object identifier (doi) |
10.1016/j.porgcoat.2020.105770 |
web of science category |
Chemistry, Applied; Materials Science, Coatings & Films |
subject category |
Chemistry; Materials Science |
unique article identifier |
WOS:000568708300005
|
ciceco authors
impact metrics
journal analysis (jcr 2019):
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journal impact factor |
4.469 |
5 year journal impact factor |
4.061 |
category normalized journal impact factor percentile |
86.922 |
dimensions (citation analysis):
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altmetrics (social interaction):
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