【摘要】 采用接触式气液介质阻挡放电装置,采用常压N₂和N₂+去离子水（H₂O）两种介质阻挡放电等离子体对PP无纺布的表面进行改性研究,实验结果表明PP无纺布经N₂+H₂O等离子体处理60 s后表面出现了超亲水,其表面水接触角降为0°。但是经N₂等离子体处理60 s,表面接触角由未处理时的115.8°降低至62°,并未出现超亲水。通过扫描电镜、X射线光电子能谱的对比分析发现,PP经N₂+H₂O等离子体处理60 s后,表面出现粘连、刻蚀,表面C1s的含量由原来的96.7%下降到31.8%,同时表面O1s和N1s的含量分别增加到38.4%和29.8%,比PP经N₂等离子体处理60 s后C1s多降低20.8%,而O1s和N1s的含量分别多增加了12.7%和8.1%,并且PP表面分子出现明显的交联;而FTIR-ATR的结果进一步表明,PP经N₂+H₂O等离子体处理60 s后表面接入更多的-OH,从而导致表面超亲水。更多还原

【Abstract】 We experimentally addressed the surface modification of polypropylene（PP） non-woven fabric with atmospheric gas-liquid dielectric barrier discharge（DBD） plasma.The influence of the nitrogen + deionized water DBD plasma on the microstructures and wettability of the PP fabrics was investigated with scanning electron microscopy,X-ray photoelectron spectroscopy and Fourier transform infrared attenuated total reflection（FTIR-ATR） spectroscopy.The results show that the N₂+H₂O DBD plasma makes the difference.For instance,modified for 60 s,the PP fabric had a water-contact angle of 0°,showing a super-hydrophilicity,possibly because of high-OH density.The content of C1 s decreased from 96.7% to 31.8%,while contents of O1s and N1s increased to 38.4% and 29.8%,respectively.In addition,plasma-etching,surface-roughening,deformation,cracking and cross-linking of individual PP fibers were observed.When it comes to enhancement of hydrophilicity,N₂+H₂O plasma significantly outperforms N₂ plasma.更多还原