Abstract
A nanocomposite hybrid coating was synthesised from tetraethylethoxysilane and 3-methacryloxypropyl trimethoxysilane in the presence of benzoyl peroxide as an initiator agent by sol–gel process. The AISI 316L stainless steel (SS) was coated with this coating at ambient temperature. The effect of the hybrid coating on the adhesion promotion of bone cement to SS substrate was investigated qualitatively as well as quantitatively. The adhesion tests indicated that the coated 316L SS compared with the uncoated samples induces increases of ∼450% in strength and 200% in strain by single lap joint shear test. The samples were also characterised using scanning electron microscopy, optical microscopy, Fourier transform infrared spectroscopy and small angle X-ray scattering (SAXS). The test results indicated that the coated surfaces were quite uniform and crack free. Silicon mapping and SAXS analysis of the coated samples indicated that the inorganic moieties of the hybrid (i.e. Si–O–Si) were uniformly distributed and had a particle size distribution of ∼1·5 nm. In addition, the haemocompatibility of the coated sample was investigated by clotting time test. The result of clotting time for the coated 316L SS showed an increase of 74% compared with the uncoated samples.
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