%0 Journal Article
%T Research on Enhanced Photocatalytic Degradation of Medical PVC by Plasma-initiated Free Radicals<br>等离子体引发自由基增强光催化降解医用PVC的研究
%A LI Xiao-jing
%A QIAO Guan-jun
%A CHEN Jie-rong
%A <br>李晓菁
%A 乔冠军
%A 陈杰瑢
%J 环境科学
%D 2007
%I 
%X Effects of plasma-initiated free radicals on photocatalytic degradation of medical PVC with anatase TiO2 were studied. Surface properties of PVC were characterized by the contact angle, surface tension, X-ray photoelectron spectroscopy (XPS) and electron spin resonance (ESR). The results indicate that the surface free energy and wettability of plasma-treated PVC increase greatly. The contact angles of distilled water, glycerin and dihydroxyethylsulfide for the plasma-treated PVC decrease. ESR reveals radicals on the surface of the plasma-treated PVC film nearly increase ten times. Moreover, the photodegradation of the PVC-TiO2 was compared with that of plasma-treated PVC-TiO2 through performing weight loss monitoring, scanning electron microscopic (SEM) analysis. Weight-loss rate of the plasma-treated PVC-TiO2 increases 27.4% in comparison with that of PVC-TiO2 under UV irradiation for 60 hours. SEM of the plasma-treated PVC-TiO2 film shows a lot of crack on the surface after photodegradation. Plasma treatments aggravate the photocatalytic degradation of medical PVC.
%K plasma
%K PVC
%K TiO2
%K photocatalytic degradation
%K radical<br>等离子体
%K PVC
%K TiO2
%K 光催化降解
%K 自由基
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=BC85E858628321E191FD67A4A5C9C8DD&yid=A732AF04DDA03BB3&vid=D3E34374A0D77D7F&iid=94C357A881DFC066&sid=BA5B7FED4FC3CDB1&eid=20154CF366EC08B1&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=17