水污染治理
李茹,陈杰镕.远程氩等离子体提高PVC生物填料挂膜性能的机理研究[J].环境科学学报,2005,25(9):1170-1174
远程氩等离子体提高PVC生物填料挂膜性能的机理研究
- Research on the improvement mechanism of PVC bio-carrier surface forming biofilm property by remote argon plasma
- 基金项目：国家自然科学基金(No.20174030);高等学校博士学科点基金(No.20010698007);教育部留学回国人员启动基金(No.2001[345])
- 作者
- 单位
- 李茹
- 1. 西安交通大学环境与化学工程学院, 西安 710049; 2. 西安工程科技学院环境与化学工程学院, 西安 710048
- 陈杰镕
- 西安交通大学环境与化学工程学院, 西安 710049
- 摘要：采用接触角测定、电子扫描电镜(SEM)和X射线光电子能谱(XPS)研究了远程氩等离子体表面改性前后PVC填料表面结构性能的变化,以揭示远程氩等离子体提高PVC生物填料挂膜性能的机理,并对表面改性前后PVC填料进行了细菌挂膜试验.同时,利用"远程等离子体"场,评价了等离子体表面改性中电子、离子、自由基的贡献.结果表明,远程氩等离子体可以通过将含氧基团和含氮基团引入PVC填料表面,使其表面极性改变,提高表面润湿性能,使得填料的挂膜性能提高,从而增强了PVC填料的生物亲和性,加强了微生物的附着、固定作用.远程氩等离子体可以在一定程度上抑制电子、离子的刻蚀作用,强化自由基反应.
- Abstract：Microorganism adhesions on PVCbio-carrier and influence factors were investigated to determine the modification effects of remote argon plasma on PVC. And then, modified surface structure of PVCbio-carrier was characterized by contact angle measurement, SEMand XPS. Finally the mechanism was further analyzed, and the role of all kinds of active species, e.g. electrons, ions and free radicals involved in plasma surface modification at a "remote plasma" field, was further evaluate. The results showed that some functional groups were found in the PVCsurface treated with remote argon plasma. The surface wettability of PVCfilm was improved by remote argon plasma, moreover, biocompatibility of PVC Bio-carrier, Bio-carrier adhesion rate and capacity on the modified surface were enhanced significantly. The remote argon plasma could restrain the ion and electron eroding effect and enhance free radical reaction.
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