低温等离子体改善义齿基托表面润湿性的研究

发布时间：2019-02-14 09:28

【摘要】：使用直流电激发4种工作气体(Ar,Ar/O2,Ar/O2/N2和He/O2)来产生等离子体,分别处理热凝树脂样本1,2,4,6,8,10分钟,每组9个样本。使用接触角测量仪测量处理前后各样本的接触角;利用发射光谱(OES)对等离子体的活性成分进行分析;采用X射线光电子能谱(XPS)分析其表面的元素价键改变。经过Ar,Ar/O2,Ar/O2/N2和He/O2等离子体处理后,热凝树脂表面的润湿性均显著增加,处理1分钟时,样本表面的接触角与原始值相比,显著减小(p0.001),随着时间的延长,减小趋势变缓。OES结果显示等离子体的活性成分中包含有大量的·OH;XPS分析表明:经过等离子体处理后,热凝树脂表面的C元素与O元素的比例减小,有新的亲水性基团C—OH产生。大气压低温等离子体处理热凝树脂表面后,产生新的亲水性基团C—OH,从而增加表面亲水性。研究结果提示低温等离子体可能为临床上处理义齿基托树脂提供新方法。
[Abstract]:Four kinds of working gases (Ar,Ar/O2,Ar/O2/N2 and He/O2) were excited by direct current to produce plasma. Each group of 9 samples was treated for 10 minutes. The contact angle of each sample before and after treatment was measured by contact angle measuring instrument; the active component of plasma was analyzed by emission spectrum (OES); and the change of element valence bond on the surface was analyzed by X-ray photoelectron spectroscopy (XPS). After Ar,Ar/O2,Ar/O2/N2 and He/O2 plasma treatment, the wettability of the thermosetting resin surface increased significantly. After 1 minute treatment, the contact angle of the sample surface decreased significantly compared with the original value (p0.001). As time went on, the decreasing trend slowed down. OES results showed that the active components of the plasma contained a large number of OH;. XPS analysis shows that after plasma treatment, the ratio of C element to O element on the surface of thermosetting resin decreases, and a new hydrophilic group C-OH is produced. A new hydrophilic group C-OH was formed after the surface treatment of thermosetting resin by atmospheric pressure low temperature plasma, thus increasing the hydrophilicity of the surface. The results suggest that low-temperature plasma may provide a new method for clinical treatment of denture base resin.
【作者单位】：兰州大学口腔医学院;北京大学前沿交叉学科研究院;北京大学口腔医院材料研究室;北京大学口腔医院综合科;北京大学工学院;
【基金】：甘肃省自然科学基金(1208RJZA193)资助
【分类号】：R783.6

【共引文献】