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Tribological Self-healing Coating based on Hydrogel

  • Chang-Lae KimEmail author
  • Hae-Jin Kim
  • Dae-Eun Kim
Conference paper
Part of the Mechanisms and Machine Science book series (Mechan. Machine Science, volume 73)

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.

Keywords

Coating Friction Hydrogel Self-healing Wear 

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Notes

Acknowledgment

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MSIT) (No. 2010-0018289 and No. 2018R1C1B5085931)

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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringChosun UniversityGwangjuRepublic of Korea
  2. 2.School of Mechanical and Aerospace EngineeringGyeongsang National UniversityJinjuRepublic of Korea
  3. 3.Department of Mechanical EngineeringYonsei UniversitySeoulKorea

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