【作者】 刁颖；

【导师】 徐金洲；

【作者基本信息】 东华大学 ， 等离子体物理， 2011， 硕士

【摘要】 本文主要研究目的是利用自行设计常压等离子体设备,建立常压等离子体纤维连续处理系统；对常压等离子体进行放电特性分析及利用其对高性能纤维进行表面改性处理,改善纤维表面润湿性并对改性机理分析研究。首先,通过对等离子体的电学参数分析和发射光谱诊断,研究分析了在不同电源功率和气体组分条件下等离子体的状态。氩等离子体放电电流-电压特性曲线及放电图像表明,放电主要是由一些极细的放电丝组成,外观上接近于辉光放电,放电周期随着电源功率增大缩短,放电细丝开始逐渐集中,直至看到明显的丝状放电。利用放电的发射光谱数据,诊断了等离子体内的粒子状态以及计算了电子激发温度、密度及其随功率和气体组分变化情况。Ar等离子体中的粒子：OH(309nm),O(777nm),Ar(763nm)的发射光谱强度跟电源功率成正比关系。等离子体的电子激发温度及电子密度在同一电源功率下会发生突变,对等离子体的状态发生重大影响。本文还研究了利用常压DBD等离子体纤维连续处理系统对高性能PET纤维、Kevlar纤维及UHMWPE纤维进行了表明改性处理,并通过SEM和动态接触角等表面表征方法对改性结果进行了讨论。SEM结果表明,随着电源功率的增加,纤维表面刻蚀效果增强。但纤维的接触角并不和外加电源功率大小成比例关系。综上所述,本论文通过对常压DBD等离子体进行放电特性研究并将其和纤维改性结果结合分析,探讨等离子体纤维处理机理。更多还原

【Abstract】 The objective of this study was to establish a continuous atmospheric pressure plasma treatment system through our own developed atmospheric pressure device. Discharge characteristics of atmospheric pressure plasma for analysis and use of its high performance fiber surface modification to improve wettability of fiber surface modification mechanism and analysis.To research the various plasma state under different applied power and gas composition, electrical and optical characterization of plasma have been analysis. Argon plasma discharge current-voltage characteristics and discharge images show that the discharge is mainly composed of a number of very fine filament discharge, appearance close to the glow discharge, the discharge cycle decreases with the increased applied power, discharge filaments began to focus on until became the obvious filamentary discharge. To show the particles state, electron excitation temperature and electron number density from plasma on applied power and variation of ratio of O2/Ar in the plasma, the optical emission spectrum and intensity of specific line were taken. The optical emission intensities is proportional with the power supply at wavelengths of 309 nm, 763nm and 777 nm, as representation of dominating species in discharge, correspond to OH, Ar and O, respectively.Electron excitation temperature and electron number density will dramatic change under certain applied power and have significant impact to the state of the plasma. Continuous atmospheric pressure plasma treatment system was employ to modification the high performance PET fiber, Kevlar fiber and UHMWPE fiber. The change of the surface properties after atmospheric pressure plasma treatment was studied and discussed by SEM and dynamic contact angle. SEM results showed that with the increase of power supply, fiber surface etching effect increased. But the contact angle of the fiber and the applied power supply power is not proportional to the size relationship.In summary, this study carried out by atmospheric pressure DBD plasma discharge characteristics, and fiber modification and the results of their combined analysis of plasma fiber treatment mechanism.更多还原