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Journal of Biomaterials Applications
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Electrohydrodynamic Jetting Behaviour of Polyhedral Oligomeric Silsesquioxane Nanocomposite

R. Bakhshi

Department of Mechanical Engineering, University College London Torrington Place, London WC1E 7JE, UK, Biomaterials and Tissue Engineering Centre, Academic Division of Surgery and Interventional Sciences, University College London, Hampstead Campus London NW3 2PF, United Kingdom

M.J. Edirisinghe

Department of Mechanical Engineering, University College London Torrington Place, London WC1E 7JE, UK, m.edirisinghe{at}ucl.ac.uk

A. Darbyshire

Biomaterials and Tissue Engineering Centre, Academic Division of Surgery and Interventional Sciences, University College London, Hampstead Campus London NW3 2PF, United Kingdom

Z. Ahmad

Department of Mechanical Engineering, University College London Torrington Place, London WC1E 7JE, UK

A.M. Seifalian

Biomaterials and Tissue Engineering Centre, Academic Division of Surgery and Interventional Sciences, University College London, Hampstead Campus London NW3 2PF, United Kingdom

In this paper, we investigate in detail the electrohydrodynamic spraying of a nonbiodegradable nanocomposite polyhedral oligomeric silsesquioxane polymer developed in our laboratories and currently being explored for coating metallic stent materials. Different concentrations of the polymer have been dissolved to prepare, characterise, and electrohydrodynamically deposit the polymer on stainless steel. From the experiments, the solution containing 15 wt% polymer was selected for further investigation. The variation of film/ coating thickness as a function of spraying time was studied and the structural features of the film were assessed using microscopy. Films were also tensile tested. This study has identified a process and conditions which can be used in our stent coating research.

Key Words: electrohydrodynamic spraying • stent • coating • nanocomposite • polymer • silsesquioxane.

This version was published on January 1, 2009

Journal of Biomaterials Applications, Vol. 23, No. 4, 293-309 (2009)
DOI: 10.1177/0885328208089125
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