標題: Modification of Hydrophilic Property of Polypropylene Films by a Parallel-Plate Nitrogen-Based Dielectric Barrier Discharge Jet
作者: Chiang, Ming-Hung
Liao, Kuo-Chi
Lin, I-Min
Lu, Chi-Chang
Huang, Hao-Yuan
Kuo, Chi-Liang
Wu, Jong-Shinn
機械工程學系
Department of Mechanical Engineering
關鍵字: Atmospheric-pressure plasma (APP);dielectric barrier discharge (DBD);polypropylene (PP);quasi-pulsed
公開日期: 1-六月-2010
摘要: Modification of the hydrophilic properties of polypropylene (PP) films has been investigated using the postdischarge region of a pulsed nitrogen-based dielectric barrier discharge under atmospheric-pressure conditions. Results show that, for the stationary PP films, the contact angle (CA) decreases dramatically from 103 degrees(untreated) to less than 30 degrees (treated) with a wide range of O(2)/N(2) ratios (<1%) and treating distances (<10 mm). In addition, the CA can still be maintained at similar to 40 degrees after 24 h of the aging test. For the nonstationary PP films, a highly hydrophilic surface can only be obtained when the PP film is placed near the jet exit with O(2)/N(2) ratios of 0.06%-0.2%. Additionally, the CA can only be maintained at similar to 80 degrees-90 degrees when the moving speed is similar to 1 cm/s after 24 h of the aging test. These observations are explained through measured optical emission spectra and ozone concentration data, in which the metastable nitrogen plays a key role in breaking the surface chemical bounds and the UV emission (200-300) participates in the process of converting the ozone into oxygen radical. Furthermore, X-ray photoelectron spectroscopy analysis showed that the O/C ratio increases dramatically for improved hydrophilic surface and the incorporation of functional groups containing oxygen (e. g., C-O and C = O) is critical in increasing the aging time after plasma treatment.
URI: http://dx.doi.org/10.1109/TPS.2010.2045769
http://hdl.handle.net/11536/5325
ISSN: 0093-3813
DOI: 10.1109/TPS.2010.2045769
期刊: IEEE TRANSACTIONS ON PLASMA SCIENCE
Volume: 38
Issue: 6
起始頁: 1489
結束頁: 1498
顯示於類別:期刊論文


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  1. 000281764700004.pdf