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Open AccessArticle

Self-Healing Materials for Ecotribology

Department of Mechanical Engineering, National Cheng Kung University (NCKU), No. 1 University Road, Tainan 70101, Taiwan
Author to whom correspondence should be addressed.
Academic Editors: Te-Hua Fang, Chien-Hung Liu, Ming-Tsang Lee and Tao-Hsing Chen
Materials 2017, 10(1), 91;
Received: 25 October 2016 / Revised: 17 January 2017 / Accepted: 17 January 2017 / Published: 22 January 2017
(This article belongs to the Special Issue Selected Material Related Papers from ICI2016)
Hydroxypropyl methylcellulose (HPMC) is a biopolymer that is biodegradable, environmentally friendly, and bio-friendly. Owing to its unique chemical structure, HPMC can reduce the coefficient of friction (COF) and frictional wear and thus possesses excellent lubrication properties. HPMC has good dissolvability in specific solvents. The present research focuses on the reversible dissolution reaction subsequent to the film formation of HPMC, with a view to the healing and lubrication properties of thin films. Raman spectroscopy was used to test the film-forming properties of HPMC and the dissolution characteristics of various solvents. In this study, the solvents were water, methanol, ethanol, and acetone. The results showed that the HPMC film had the highest dissolvability in water. The ball-on-disk wear test was used to analyze the lubrication properties of HPMC, and the results showed that HPMC had the same COF and lubrication properties as the original film after being subjected to the water healing treatment. The HPMC film can be reused, recycled, and refilled, making it an ideal lubricant for next-generation ecotribology. View Full-Text
Keywords: self-healing; hydroxypropyl methylcellulose (HPMC); biopolymer; green tribology; lubrication; sustainable manufacturing self-healing; hydroxypropyl methylcellulose (HPMC); biopolymer; green tribology; lubrication; sustainable manufacturing
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Shi, S.-C.; Huang, T.-F. Self-Healing Materials for Ecotribology. Materials 2017, 10, 91.

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