Tribological Self-healing Coating based on Hydrogel

Chang Lae Kim, Hae Jin Kim, Dae Eun Kim

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The self-healing effect and durability of hydrogels formed as a thin coating on a substrate were investigated in order to protect the surface of a mechanical component that experience contact sliding. Particularly, the physical, mechanical and tribological properties of hydrogel coatings were assessed. The morphology of hydrogel coatings greatly changed according to the formation conditions of the coating. Accordingly, the mechanical and tribological proper-ties of hydrogel coatings varied significantly. Compared with a completely dried hydrogel coating formed by a freeze-drying process, the durability and tribological properties of the hydrated hydrogel coating formed by contacting with water were greatly improved. Moreover, the wear track formed on the surface of the hydrogel coating after reciprocating sliding in a state of contact with a ball tip at a constant load was self-healed by contacting with water. The main mechanism of the self-healing effect of the hydrogel coating was postulated to be due to the swelling behavior of hydrogel fibers and the osmotic phenomena of water molecules. The results of this study will contribute to the development of self-healing coatings for surface protection in precision components and biomaterials.

Original languageEnglish
Title of host publicationMechanisms and Machine Science
PublisherSpringer Netherlands
Pages3771-3774
Number of pages4
DOIs
Publication statusPublished - 2019 Jan 1

Publication series

NameMechanisms and Machine Science
Volume73
ISSN (Print)2211-0984
ISSN (Electronic)2211-0992

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All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Kim, C. L., Kim, H. J., & Kim, D. E. (2019). Tribological Self-healing Coating based on Hydrogel. In Mechanisms and Machine Science (pp. 3771-3774). (Mechanisms and Machine Science; Vol. 73). Springer Netherlands. https://doi.org/10.1007/978-3-030-20131-9_372