不同消毒方法对碳离子改性硅橡胶表面自由能及邵氏硬度的影响

目的 初步探讨碳离子硅橡胶经过不同消毒试剂与方法处理后其表面亲疏水性、表面自由能以及邵氏硬度的变化情况.方法 碳离子硅橡胶经过70％酒精、2％碱性戊二醛、0.5％碘伏、5.25％次氯酸钠、3％过氧化氢以及134℃高温、高压等消毒试剂或方法处理后,采用静态接触角测定仪检测其表面水、甘油接触角以及邵氏硬度变化情况,采用Owen-Wendt公式计算表面自由能γs、极性分量γsp以及非极性分量γsd变化.结果 碳离子硅橡胶经过5.25％次氯酸钠以及3％过氧化氢处理后,其表面接触角以及表面自由能发生明显变化,前者使得其表面呈现出完全的亲水性;70％酒精、2％碱性戊二醛、0.5％碘伏以及134℃高温、高压等方法对材料表面接触角以及表面自由能等影响较小.不同处理组材料表面邵氏硬度差异均无统计学意义.结论 70％酒精以及134℃高温、高压等消毒方法对碳离子硅橡胶表面性能影响最小,结合操作便利性等因素,70％酒精可认为是该材料最适宜的消毒处理方式.而次氯酸钠消毒液极不利于该材料表面形貌维持,不宜采用.

Effect of different disinfection methods on surface free energy and Shore hardness of carbon ion-implanted silicone rubber

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 ionimplanted 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.