Objective      To study the changes of surface contact angle

surface free energy and Shore hardness of carbon ion-implanted silicone rubber disinfected by different methods.       Methods      Carbon ion-implanted silicone rubber was treated with 70% alcohol

2% alkaline glutaraldehyde

0.5% iodine volts

5.25% sodium hypochlorite

3% hydrogen peroxide respectively

and high temperature of 134℃ under high pressure for 2 h

and then the surface contact angle and Shore hardness were tested with a contact angle instrument and a Shore durometer (type A). Surface free energy

polar component and nonpolar component were calculated with Owen-Wendt methods.       Results      The surface quality of carbon ion-implanted silicone rubber was changed after disinfection with 3% hydrogen peroxide and 5.25% sodium hypochlorite

and 5.25% sodium hypochlorite even made the surface in highly hydrophilic state. There was no effect on the surface quality after disinfection with 70% alcohol

2% alkaline glutaraldehyde

0.5% iodine volts and high temperature of 134 ℃ under high pressure. The Shore hardness was not affected by all the disinfection methods.       Conclusion      70% alcohol and high temperature of 134 ℃ under high pressure have the minimal effects on the surface free energy

and based on operation convenience

70% alcohol is considered as the optimal disinfection method for carbon ion-implanted silicone rubber.