2013 Fiscal Year Final Research Report
Creation of new laminated polyvinyl alcohol hydrogel sheet aiming at application of artificial cartilage
| Project/Area Number |
23656119
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Design engineering/Machine functional elements/Tribology
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| Research Institution | Kanazawa University |
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Principal Investigator |
IWAI Tomoaki 金沢大学, 機械工学系, 講師 (30242530)
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| Project Period (FY) |
2011 – 2013
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| Keywords | ポリビニルアルコール / ハイドロゲル / 積層化 / リン酸三カルシウム / 摩擦 / 摩耗 / 人工軟骨 |
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| Research Abstract |
A new laminated gel sheet piling up 3 lamellas of polyvinyl alcohol hydrogel (PVA-H) having different concentrations of tricalcium phosphate was created. Each lamella was 1mm in thickness, so that the total thickness of the sheet was 3 mm in accordance with vital cartilage. Both tensile and compressive properties of tricalcium phosphate-filled PVA-H were higher than those of unfilled PVA-H. On the other hand, unfilled PVA-H showed the lower coefficient of friction than the filled PVA-H. It was found that the effective means for achieving high mechanical properties with lower coefficient of friction was lamination. A laser profile meter was used to measure the wear of hydrogel. Thin graphite film was adhered onto the gel sheet to distinguishi the gel surface from the water film on the gel surface. As a result, the effect of tricalcium phosphate filler was not clear under abrasive wear condition, while the wear resistance of filled PVA-H was as the same as that of unfilled PVA-H.
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