To Improve The Wettability Of Metallic Surface And The Adhesion Between Metallic And Polymeric Materials Through A Plasma Polymerized Hydrophilic Film

• Main Authors: Jia-Zheng Lai, 賴佳正
• Other Authors: n
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/ecty8k

碩士 === 崑山科技大學 === 機械工程研究所 === 92 === The interfacial science of material has always been discussed by scientists. In the different applied areas, the hydrophilicity and the hydrophobicity on the object surface will tremandolously affect the adhesion. There are many kinds of surface modifications process, one of the most common treatments is the plasma coating technology; especially for the electronic industry. One of the objectives of this study is to investigate the drainage property of plasma thin film coating on the evaporator surface, the other objective is to measure the alteration of optic characteristics of PTFE after plasma coating treatment. We employ the radio frequency plasma generator as a plasma source, and then produce a layer of hydrophilic film on the aluminum and the PTFE surfaces by the HMDSO mixed with Oxygen which flows into the plasma reactor. We use the plasma coating technology to alter the surface characteristics of materials. In the study of hydrophilicity on aluminum surface, we utilize the thermo-electric cooler as a cooling source, and design a temperature controlled droplet condensation apparatus. During droplet condensation process, the water molecule will retain on the uncoated test sample as a little droplet. On the other hand, the water molecule will retain on the coated test sample as a water thin film. If we make the test sample tilted, it can be found that the coated test sample has less water retained on the surface then the uncoated one. So, the hydrophilic treatment plus the gravity can effectively withdraw the water molecule before returning to the conditioning room and the humility can be reduced. In the study of adhesion on the polymer surface, the water contact angle of PTFE surface changed from 100∘to 26∘after the plasma hydrophilic treatment. It is a benefit for later adhesive operation. In the optic aspect, we employ laser to measure the BRDF of hydrophilic film on the PTFE. The results show the clearly variations between Specula, Haze and Diffuse.