O_(2)和N_(2)等离子体处理对HDPE表面润湿性的影响研究  

Effect of Oxygen and Nitrogen Plasma Treatment on Surface Wettability of HDPE

作　　者：马子涵 王洪艳[2] 袁少飞[2] 张建[2] 吴燕[1] MA Zi-han;WANG Hong-yan;YUAN Shao-fei;ZHANG Jian;WU Yan(Nanjing Forestry University,Nanjing 210037,China;Zhejiang Academy of Forestry,Hangzhou 310023,China)

机构地区：[1]南京林业大学,江苏南京210037 [2]浙江省林业科学研究院,浙江杭州310023

出　　处：《塑料科技》2024年第9期20-26,共7页Plastics Science and Technology

基　　金：浙江省省院合作重大项目(2023SY05)。

摘　　要：为改善高密度聚乙烯(HDPE)表面润湿性,分别采用氧气(O_(2))和氮气(N_(2))等离子体对其表面进行改性,以水(H_(2)O)和二碘甲烷(CH_(2)I_(2))作为测试液对改性前后的表面接触角进行测试,分析了改性后表面润湿性变化,确定了O_(2)和N_(2)低温等离子体改善HDPE表面润湿性的最优工艺。进一步采用扫描电子显微镜(SEM)、傅里叶红外光谱(FTIR)、X射线衍射仪(XRD)、X光电子能谱微观结构(XPS)对最优工艺处理前后HDPE表面形貌、化学结构及官能团进行了分析。结果表明:经O_(2)和N_(2)等离子体处理后,HDPE表面润湿性显著提高,表面能增大,两种等离子体改善HDPE表面润湿性最优工艺分别为功率1000 W、时间10 s、流速1.5 L/min(O_(2)),功率800 W、时间15 s、流速2.5 L/min(N_(2));等离子体处理后,HDPE表面发生蚀刻现象,产生明显凹坑,并在其表面引入了含氧官能团C—O、C=O、O—C=O和含氮气官能团—C—NH_(2)、—C—NH—。N_(2)等离子体最优工艺处理对HDPE表面润湿性改善效果较O_(2)明显。In order to improve the wettability of high density polyethylene(HDPE)surface,the surface of HDPE was modified by oxygen(O_(2))and nitrogen(N_(2))plasma respectively,the surface contact angles before and after modification were tested with water(H_(2)O)and diiodomethane(CH_(2)I_(2)),the wettability changes of the modified surface were analyzed,and the optimal process for improving the surface wettability by plasma of O_(2)and N_(2) was determined.Furthermore,the surface morphology,chemical structure and functional groups of HDPE were analyzed by scanning electron microscopy(SEM),fourier infrared spectroscopy(FTIR),X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS).The results show that the wettability and surface energy of HDPE were increased significantly after being treated by O_(2) and N_(2) plasma.The optimum process for improving the surface wettability of HDPE by two kinds of plasma was as follows:Power 800 W,time 10 s,flow rate 1.5 L/min for O_(2),power 1000 W,time 15 s,flow rate 2.5 L/min for N_(2).After plasma treatment,the surface of HDPE was etched and pitted,and oxygen-containing functional groups C=O,O—C=O,and nitrogen-containing functional groups—C—NH_(2),—C—NH—were introduced into the surface of HDPE.N_(2) optimal plasma treatment has a better effect on the surface wettability of HDPE than that of O_(2).

关 键 词：等离子体 表面润湿性 高密度聚乙烯 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]