近年來由於能源危機以及綠色意識抬頭，許多研究紛紛提出有關於對環境友善、可再生的材料或者可重複使用，其中綠色磨潤更是這些年來磨潤學關注的焦點之一。在Michael Nosonovsky與Bharat Bhushan編著的Green Tribology中提到：將摩擦磨耗最小化，減少潤滑劑使用，並使用天然或是對環境友善的綠色磨潤材料。本研究使用對環境友善且無毒的綠色磨潤材料羥丙基甲基纖維素做為本實驗中的綠色薄膜，探討不同環境與溶劑參數下對羥丙基甲基纖維素薄膜自我修復性質的影響，再以迴轉式磨耗試驗機（Pin-On-Disk）分析其在大氣環境下薄膜之磨潤行為，並觀察薄膜在自我修復前後的磨潤行為。
　　實驗中羥丙基甲基纖維素薄膜成膜後，藉由EDS與Raman確定其擁有良好均勻度，透過SEM觀察薄膜表面型態及橫截面的元素顯示出其優異的均勻度及分散性。經過迴轉式磨耗試驗機（Pin-On-Disk）產生磨痕並記錄其摩擦係數，3D雷射掃描顯微鏡掃描磨痕紀錄磨痕寬度與深度。實驗結果顯示使用去離子水進行自我修復，能使薄膜達到90%以上的自我修復；在濕度為RH90%溫度為90℃時，薄膜上的磨痕可以達到最佳修復效果，在自我修復時間來到8小時時，可以達到70%的自我修復。
　　總體而言，本研究成功以羥丙基甲基纖維素溶液形成均勻度良好且具有降低摩擦係數、抗磨耗之薄膜，且證實擁有自我修復性質，在一定的環境參數下能夠讓薄膜顯著地恢復至初始狀態，羥丙基甲基纖維素薄膜可以重複使用並大幅延長使用壽命，因其本身便是對環境友善的磨潤材料，相當符合綠色磨潤的宗旨。

　　Since energy crisis and rise of environmental awareness, lots of researchers focus on ecofriendly, renewable and reusable materials/processes. Green tribology is the one of central issue in tribology even more in recent years. Green Tribology which is written by Michael Nosonovsky and Bharat Bhushan mentions about (1) minimizing friction and wear, (2) reducing lubricants, (3) using natural or ecofriendly materials. This research uses ecofriendly and nontoxic material called hydroxypropyl methylcellulose (HPMC) as green thin film and investigates how different environmental and solvent parameters affect self-healing of HPMC. Furthermore, taking pin-on-disk tribometer results analyzed tribology performance of HPMC film in ambient environment and observed the change of tribology performance before and after self-healing.
　　After HPMC is formed on silicon substrate, we confirm that it has excellent element distribution with EDS and Raman spectrometer results and observe well element distribution and dispersion of surface and cross section through SEM. Wear scars will emerge on HPMC films after the tribotest, so we record the coefficient of friction and scan wear scars on samples by 3D laser scanning microscope to record wear depth and width. Experiment results show out that heal efficiency can reach up to 90% healed by deionized water; on the other side, its healing efficiency has the optimal self-healing effect when environmental parameters are RH90% and 90℃. It will be able to reach up to 70% if HPMC films are placed at RH90% and 90℃ during 8 hours.
　　Overall, this research successfully use HPMC solution to form green thin films which can reduce the coefficient of friction and have well element distribution, anti-wear ability and most importantly have self-healing property. Based on the above, HPMC films can be reused and significantly extended its life. In addition, it quite meet the purpose of green tribology because HPMC is exactly a green material.

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