Abstract
We have prepared a polyether-type polyurethane (PU) containing 0.043% gold nanoparticles (∼5 nm) by mixing the waterborne PU with gold suspension, casting and drying at 60 °C. The gold nanoparticles were found to be well dispersed in PU. A significant increase in the pyrolysis temperature and the glass transition temperature was demonstrated in the nanocomposite PU films. The biostability was tested in a rat subcutaneous model. After 19 days of implantation, the PU containing gold showed less surface degradation as well as much reduced tissue reaction.
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