- 學位論文
甲烷/氧氣電漿進行遙距式聚丙烯膜表面改質及於不同改質位置之表面特性探討
Investigation of Surface Modification on Polypropylene(PP) Membrane Surface by Remote Low Pressure Methane (CH4) / Oxygen (O2) Plasma
若您是本文的作者，可授權文章由華藝線上圖書館中協助推廣。
摘要
本論文旨在藉由甲烷/氧氣混合氣體之射頻式(RF)圓管低壓甲烷(CH4)/氧氣(O2)混合氣體電漿進行聚丙烯薄膜(Polypropylene, PP)之表面改質研究，期望改善聚丙烯薄膜之表面疏水及低表面能之特性。 實驗分為兩大部分，第一部份為探討聚丙烯薄膜於直接電漿區(plasma region)及後輝光放電區(afterglow region)兩種電漿改質位置下，表面親疏水特性變化之差異；第二部份為探討當聚丙烯薄膜放置於直接電漿區及兩種不同電極位置之進氣端區等三種改質狀態。 由本論文研究之結果得知，聚丙烯薄膜於遙距式電漿區會因自由基、部分帶電粒子及離子擴散至表面而使之獲得些微表面改質效果；而隨著電極之位置遠離進氣端，會減少自由基、帶電粒子及離子擴散至進氣端之機率，使得聚丙烯薄膜表面改質之效果降低。此外，於電極中心進行低壓甲烷/氧氣混合氣體電漿改質聚丙烯薄膜則為最有效改善聚丙烯薄膜表面之疏水特性及聚丙烯薄膜低表面能之缺點，水滴接觸角最低可達10°、及表面自由能可至77.5 mJ/m2。
並列摘要
This thesis focuses on exploration of low-pressure methane (CH4)/oxygen (O2) mixing gas plasma surface modification which occurring in luminous gas phase and non-luminous gas phase. Polypropylene (PP) membranes were set at different positions away from glow region of RF CH4/O2 mixture gas plasma with respect to their suitability for surface modification. The photoemission plasma species in RF CH4/O2 mixture gas plasma was identified by Optical Emission Spectroscopy (OES). As a result, the OES data and contact angle value evidently indicated that in CH4/O2 glow discharge. It was found that RF CH4/O2 mixture gas plasma is very effective in the surface hydrophilicity enhancement in luminous gas phase. In this study, the optical emission analysis indicates that the possible contribution of RF CH4/O2 mixture gas plasma is mainly occurred at the combination of electron-impact-dissociation and ionization. Research effort was also given to the surface analysis of RF CH4/O2 mixture gas plasma modified PP membranes. Fourier Transform Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS), Confocal Laser Scanning Microscopy (CLSM), and Scanning Electron Microscopy (SEM) were used to detect the correlation between surface property change and luminous effect. In summary, direct CH4/O2 mixed gas plasma treatment is relatively effective to enhance the surface hydrophilicity and surface free energy of PP membrane.
參考文獻
1. M. Ito, K. Ro, N. Tomikawa, H. Uyama, “Plasma Treatment of Polymer Films by Several Techniques”, J. Photopolym. Sci. Technol., 10, 129-134 (1997).
2. B. Bae, B. H. Chun, D. Kim, “Surface characterization of microporous polypropylene membranes modified by plasma treatment”, Polymer, 42, 7879-7885 (2001).
3. J. X. Tang, N. Y. He, M. J. Tan, Q. G. Hea, H. Chen, “A novel substrate for in situ synthesis of oligonucleotide:plasma-treated polypropylene microporous membrane”, Colloids Surf., A, 242, 53-60 (2004).
4. O. J. Kwon, S. W. Myung, C. S. Lee, H. S. Choi, “Comparison of the surface characteristics of polypropylene films treated by Ar and mixed gas (Ar/O2) atmospheric pressure plasma”, J. Colloid Interface Sci., 295, 409-416 (2006).
5. M. S. Kang, B. Chun, S. S. Kim, “Surface modification of Polypropylene Membrane by Low-Temperature Plasma Treatment”, J. Appl. Polym. Sci., 81, 1555-1566 (2001).