RESUMO
Objective To study the dynamic growth of adsorption films on solid surfaces in point contacts with aqueous protein aqueous solutions and investigate the dominating factors.Methods The formation of the adsorption films within a ball-on-disc contact was measured using optical interference technique.The effects of impact loads,impact times and surface properties of the materials on the adsorption of BSA aqueous solution were also studied.Results Under dynamic conditions,the thickness of the adsorption film was much higher than that under static condition.The adsorption film was growing with increasing impact times and finally the stable thickness could be achieved.Small loads and hydrophobic materials were favorable for the growth of the adsorption film.The BSA adsorption film was easy to grow on the steel surface,but on the ceramic surface the adsorption film thickness was low.Conclusions The research about adsorbed lubricating films evolution of protein aqueous solution under impact loads is of clinical significance for treating and preventing of artificial prosthesis.
RESUMO
Objective To study the dynamic growth of adsorption films on solid surfaces in point contacts with aqueous protein aqueous solutions and investigate the dominating factors. Methods The formation of the adsorption films within a ball-on-disc contact was measured using optical interference technique. The effects of impact loads, impact times and surface properties of the materials on the adsorption of BSA aqueous solution were also studied. Results Under dynamic conditions, the thickness of the adsorption film was much higher than that under static condition. The adsorption film was growing with increasing impact times and finally the stable thickness could be achieved. Small loads and hydrophobic materials were favorable for the growth of the adsorption film. The BSA adsorption film was easy to grow on the steel surface, but on the ceramic surface the adsorption film thickness was low. Conclusions The research about adsorbed lubricating films evolution of protein aqueous solution under impact loads is of clinical significance for treating and preventing of artificial prosthesis.