| Dielectric Barrier Discharge (DBD) is one of hotspots that have arisen these years in the world. Due to its characteristic, it has so much value in many areas including aviation,surface modification of material, environmental protection, ozone generation, and so on. It is very significant to further study on the characteristic of the DBD plasma.In this paper, A DBD setup with different electrodes is built up, which can discharge at different conditions and meets the need of researching discharge characteristic and the influencing factors of DBD. The experimental results present that the three electrodes DBD is basically display filamentary discharge mode. The intermittent filament impulses of current wave of the comb-like electrode are unsymmetrical while that of the plate-plate electrode is symmetrical. And the multineedle-plate DBD displays diffuse conical mode.In this paper ,the factors that influence DBD are studied, which include the form of electrodes, the dielectric material, the gap spacing and gas pressure, e.g. The results show that these factors affect discharge process and power. The appearance and characteristic of DBD is greatly influenced by gas pressure. The power in the DBD discharge varies with the pressure non-monotonously and it reaches its lowest point while the pressure is about 0.04MPa.A setup of plasma modification used in treatment of PET- Spandex fabric is built up based on the result of the experiment and the theoretical analysis above. By use of the setup, some preliminary experiments to treat PET- Spandex fabric has been done. The result show that plasma modification can greatly improve wettability and surface property, and it can also improve the alkali-washing dye fastness of the PET- Spandex fabric, from 2.5 degree to 3.0 degree.The research in this paper has prepared for the next research of the dynamical process of DBD and solving the problem of dyeing the PET- Spandex fabric. |
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