- 學位論文
大氣低溫電漿應用於材料表面防鏽與抑菌改質之研究
The Study of Atmospheric Low Temperature Plasma Application for Surface Anti-corrosion and Bacteriostatic Activity
摘要
一般工程上使用金屬材料非常廣泛，但也容易因環境因子而造成腐蝕的現象。現行工程上所使用的解決方法，其缺點有高生產成本和環境汙染之代價，而醫院環境中金屬材料的硬體設備，在使用上也有相同問題存在。根據衛福部疾病管制署在WHO的調查中也發現，台灣每年約有85,000人因院內感染拉長住院天數，其中部分發生原因是環境和設備的清潔問題導致醫療成本增加，因此於臨床上是一個相當大的課題。在材料表面改質領域中大氣電漿則是一項應用相當廣泛之技術，而且也是現今製程上一種相對乾淨安全對環境友善的技術。所以本研究希望利用大氣電漿的應用技術對金屬材料做表面改質，達到抗腐蝕和表面抑菌的特性。藉由新型大氣電漿設備在氣壓0.2MPa、功率1000W的參數條件進行探討，製程溫度檢測發現最高溫達52℃，對材料不具熱損傷；OES測得單態氧與OH基等活性氧物種強度最多；因此可使金屬材料表面的親水角度下降至10°~20°，而達到良好的親水效果。接著進行塗佈製程表面改質，材料表面改質後測得膜厚約4.07μm，表面硬度為5H；經過靜態接觸角量測發現，改質後接觸角角度約為100.85±1.147°，疏水效果相當良好；而AFM表面形態分析顯示，表面改質後塗佈材料可將平均粗糙度126.9nm下降到23.40nm，因此證實材料表面有塗佈物貼附存在；金相顯微鏡則更加驗證了塗佈材料經由表面改質貼附在材料表面。再透過100小時的防鏽測試，發現製程改質後的材料塗佈物能確實提高金屬防鏽程度；在細菌實驗結果中顯示，材料表面改質後有高達98%的抑菌效果。綜觀上述實驗結果，證實材料表面經由電漿處理塗佈製程表面改質後可達到良好的防鏽效果和抑菌功能，期望未來此方法能夠應用於醫院環境中的所有金屬設備，降低鏽蝕與細菌孳生的可能性。
並列摘要
Metals are widely used in everyday constructions, but corrosions form easily from environmental elements. Most of the industrial solutions not only have high productions costs, but also environmental pollution. These problems are seen in metal hardware equipment in hospitals as well. According to a review conducted by Taiwan Centers for Disease Control on data obtained from WHO, around 85,000 patients had prolonged hospital stays due to nosocomial infections. Some of the infections are caused by sub-optimal hospital environment and equipment cleanliness as a result of limited financial resources. In material surface modification, atmospheric plasma one of the most widely used techniques; it is clean, environmental friendly, and safe. This research will utilize atmospheric plasma application to achieve surface modification to metal surfaces that result in anti-corrosion and bacteriostatic. When atmospheric low temperature plasma equipment parameters are established at 0.2MPa atmospheric pressure and 1000W, the highest processing temperature was recorded at only 52℃, which does not incur damage to materials being processed. In the OES test, singlet oxygen, hydroxyl group and other reactive oxygen species are most prevalent, thus contact angle on metal surfaces were decreased by 10°~20°, which ensued terrific hydrophilic properties. Surface modification is applied through coating process. After processing, coating thickness is measured at 4.07μm with a surface hardness of 5H. In the static contact angle test, contact angle after modification is about 100.85±1.147° with excellent hydrophobic properties. AFM surface topography analysis on modified surface also shows average surface roughness has decreased from 126.9nm to 23.40nm. Metallographic microscope was also used to confirm the results. Further proving that the coating adheres to the material surface. In the 100-hour salt spray test, the coating consolidated modified material’s rustproofing capacity. A 98% reduction in bacterial growth is also observed on modified material surfaces. Combining the test results, I have confirmed and demonstrated exceptional antirust capability and bacteriostatic effect can be achieved by applying plasma combined with coating processing on material surfaces. I aspire this method to be implemented in medical environment for all metal equipment to vastly diminish the possibility of rust and bacterial growth.
參考文獻
延伸閱讀
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