Abstract
Frictional behavior of poly (vinyl alcohol)(PVA) hydrogel as artificial articular cartilage was examined in reciprocating motion in lubricants that contain albumin, γ-globulin, L-α dipalmitoyl phosphatidylcholine (DPPC) and hyaluronic acid (HA). Influences of synovia constituents on forming boundary film and boundary lubrication ability for PVA hydrogel were investigated by in situ fluorescent observation on forming boundary film, atomic force microscopy and infrared spectroscopy. Under the coexistence of proteins and DPPC, DPPC contributed to reduce friction of PVA hydrogel. Albumin-DPPC composite film and smooth film formed by DPPC especially reduced friction. When HA and DPPC coexist in the lubricants, HA-DPPC composite film with micron-ordered pattern was formed and it reduced friction remarkably. Through the researches on the influences of synovia constituents on boundary lubricating ability for PVA hydrogel, it was shown that albumin and DPPC function as low shearing resistance components in boundary film and γ-globulin has ability to stabilize boundary film and enhances the formation of boundary film. HA has high ability of water retention and plays a part in reduction of friction and enhancement of forming boundary film that has the characteristics of gel-like layer.
| Original language | English |
|---|---|
| Pages (from-to) | 489-498 |
| Number of pages | 10 |
| Journal | Toraibarojisuto/Journal of Japanese Society of Tribologists |
| Volume | 55 |
| Issue number | 7 |
| Publication status | Published - 2010 |
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Materials Chemistry
- Surfaces, Coatings and Films
- Surfaces and Interfaces