Development and thermal evolution of silver clusters in hybrid organic-inorganic sol-gel coatings

SURFACE & COATINGS TECHNOLOGY

卷:205

Article

Procaccini, R.¹  Cere, S.¹  Pellice, S.¹ 

[1] UNMdP CONICET, Inst Invest Ciencia & Tecnol Mat INTEMA, Mar Del Plata, Buenos Aires, Argentina

关键词: Silver clusters;    Sol-gel;    Biocide coatings;    SAXS fitting;    Silver release;   

DOI  :  10.1016/j.surfcoat.2011.06.018

来源: Elsevier

【 摘 要 】

A silver doped hybrid organic inorganic sol gel coating was developed through the hydrolytic condensation of tetraethoxysilane (TEOS) and methyl-triethoxysilane (MTES). Silica nanoparticles were added in order to give a mechanical reinforcement and silver nitrate as the supplier of Ag+ ions, which have a potential effect as a biocide component. Synthesis of precursor sol and the evolution of silver clusters in the whole process were analyzed through Attenuated Total Reflectance Fourier Transformed Infrared spectroscopy (ATR-FTIR) and UV-visible spectroscopy. A high thermal sensitivity of sub-nanometric silver particles was determined by Small Angle X-ray Scattering (SAXS) carrying to formation of higher agglomerates or silver nanoparticles. Lixiviation tests show long-term and gradual silver releasing without worsening of the structural integrity of coatings. (C) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

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