远程等离子体改善PVC生物填料表面性能的研究

'通过4种远程等离子体(Ar、He、O₂、N₂)对PVC填料进行表面改性,采用接触角测量和X射线光电子能谱分析(XPS)等手段,分析了改性前后PVC填料表面结构性能,评价了在等离子体表面改性中电子、离子、自由基的影响.结果表明,PVC表面经远程等离子体处理后,其表面润湿性和表面化学成分均发生变化,在最佳表面改性条件(放电功率60W,放电时间3min,Ar气流量为20cm³/s在距放电区40cm)下,PVC表面的(O+N)/C即从7%增加到22%,表面的水接触角从97°下降到15°以下.改性后的PVC填料表面生物膜形成速度加快,生物量显著增加.

Improvement of PVC Bio-Carrier Surface Property by Remote Plasma

The effects of various remote plasma,such as Ar,He,O₂ and N₂ on PVC bio-carrier surface modification were studied.The surface properties were characterized by the contact angle measurement and X-ray photoelectron spectroscopy(XPS).The role of all kinds of active species such as electrons,ions and free radicals involved in plasma surface modification were evaluated.Results show that the remote plasma treatments modify the PVC surface in both wettability and composition,the(O+N)/C of PVC surface increases from 7% to 22%,and the water contact angle decreases from 97°to 15°.The optimal results was achieved when plasma treatment parameters were set,that is treatment time 3min,Ar flux at 20cm³/s,power at 60W,sample position of 40cm.The results show that the modified PVC Bio-carrier adhesion rate and capacity on the modified surface are greatly increased.