関節液成分を含む水溶液の潤滑性能に及ぼす電場の効果　第１報　血清γグロブリン添加の影響

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  • Effects of Electric Field on Lubricating Ability of Synovia Constituents. 1st Report. Influence of Addition of Serum .GAMMA.-Globulin.
  • カンセツエキ セイブン オ フクム スイヨウエキ ノ ジュンカツ セイノウ ニ

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The effects of an electric field on lubricating ability of synovia constituents were examined using a reciprocating friction tester for a sliding pair of a conductive silicone rubber cylindrical surface and a stainless steel plate. Water solutions of sodium hyaluronate (HA) with different concentrations of human serum protein (γ-globulin) were used as lubricants. For 0.5wt% HA solution with 0.3 wt% γ-globulin, marked decrease in friction is observed by means of extenally applied low-frequency alternating current (AC3V, f=10 Hz, sinusoidal wave) in comparison with high-frequency alternating current. Based on atomic force microscopy (AFM) observation for stainless steel plate after testings, the adsorbing behavior on rubbing surfaces seems to be related to the line of the electric force and the electric power. The increase in concentration of γ-globulin changes the frictional behavior and imposes restrictions on lubricating-ability control by means of an electric field. These results suggest the electric field affects the adsorption to frictional surfaces and the movement of constituents of the synovial fluid between surfaces. In particular, the application of a low-frequency alternating current to rubbing surfaces may produce the optimum lubricating condition.

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