微波等离子体参数对基托材料表面改性的影响  

Effect of microwave plasma parameters on the surface modification of denture base resins

作　　者：王萍[1] 刘阳[2,3] 徐会勇[2] 赵卫东[3] 程祥荣[1] 

机构地区：[1]武汉大学口腔医学院修复科,湖北武汉430079 [2]南方医科大学南方医院口腔医学系 [3]南方医科大学人体解剖教研室/广东省医学生物力学重点实验室,广东广州510515

出　　处：《南方医科大学学报》2010年第7期1615-1617,1620,共4页Journal of Southern Medical University

基　　金：广东省自然科学基金(04300684)

摘　　要：目的探索等离子体在不同工作参数条件下对基托材料表面改性的效果,筛选最佳工艺参数条件。方法采用正交试验方法对80个试件分为16组。各组控制气体流量为13.7cm3/min,在不同输出功率(100、150、200、250W)、不同气体种类(氧气、空气、氩气、氧气和氩气混合)、气体压强(0.4、0.6、0.8、1kPa)和处理时间(1、2、5、8min)下等离子体对各组试样处理后,测定接触角后并进行统计学分析。结果对采用等离子体处理前后的样品进行瞬间液滴形貌拍照。正交实验所作等离子体处理后测定的接触角有统计学意义。结论处理时间为8min、输出功率为150W、气体压强为0.8kPa、气体条件为氧气状态是最佳的基托材料改性效果条件。Objective To explore the working parameters of the microwave plasma for surface modification of denture base resins. Methods Using orthogonal test method, 80 specimens of denture material were divided into 16 groups for testing. At the gas flow of 13.7cm3/min, the specimens were tested under the working condition of different microwave powers （100, 150, 200 and 250 W）, different gasses （oxygen, air, argon, oxygen and argon mixture）, different gas pressure （0.4, 0.6, 0.8, and 1 kPa）, and varying processing time （1, 2, 5, and 8 min）. Each group of specimens was treated with the microwave plasma and the contact angles were confirmed by scanning electron microscopy. Results The pictures of instantaneous droplet morphology were obtained from each group of samples, and the values of contact angle were measured. The contact angle was 68.86° in the untreated group, and the angles of several treated groups were 48.15°, 40.7° and 32.76°, showing a statistically significant variation of the contact angle after the treatment. Conclusion Processing time of 8 min, microwave power at 100 W, total pressure in the chamber at 0.8 kPa, and the presence of oxygen constitute the optimal condition of microwave plasma for surface modification of denture base resins. Under these conditions, the smallest contact angle of the denture base resins is 34.58°, suggesting a good effect of surface modification.

关 键 词：微波等离子体 树脂 接触角 

分 类 号：R783.1[医药卫生—口腔医学]