SYNTHESES OF SILANE COUPLING AGENTS HAVING FLUOROCARBON CHAIN AND APPLICATION TO DENTISTRY

含氟硅烷偶联剂如CF_3（CF_2）_9CH_2CH_2Si（OCH_3）_3、（CF_3）_2CF（CF_2）_8CH_2CH_2Si（OCH_3）_3、CF_3（CF_2）_9（C_6H_4）C_2H_4Si（OCH_3）_3（C_6H_4 =对苯撑），通过三氯氢硅与相应的1H，1H，2 H-多氟-1-烯烃在六氯铂酸氢（IV）的存在下，然后与甲醇钠反应。用这些产物对玻璃板进行了表面改性尝试。结果表明，硅烷偶联剂具有良好的改性能力，改性后的玻璃表面具有良好的抗硝酸氧化能力。通过测量改性玻璃表面和氧化玻璃表面与水和油酸的接触角证实了这些结果。在改性玻璃表面上，CF_3（CF_2）_9CH_2CH_2Si（OCH_3）_3的拒水拒油能力最强，水在改性玻璃表面上的最大接触角为118。从原子力显微镜的测量结果来看，硅烷偶联剂在改性后的玻璃表面上形成了双层或三层结构。我们尝试用CF_3（CF_2）_9CH_2CH_2Si（OCH_3）_3对一些牙科材料进行表面改性，并将硅烷偶联剂应用于义齿表面改性，以提供抗污能力。我们发现含长碳氟链的硅烷偶联剂CF_3（CF_2）_9CH_2CH_2Si（OCH_3）_3对这些牙科材料具有高度的表面改性能力。改良后的义齿具有更强的抗牙渍能力。

Silane coupling agents having fluorocarbon chain, such as CF_3(CF_2)_9CH_2CH_2Si(OCH_3)_3, (CF_3)_2CF(CF_2)_8CH_2CH_2Si(OCH_3)_3, and CF_3(CF_2)_9(C_6H_4)C_2H_4Si(OCH_3)_3(C_6H_4 =p-pheny lene), were prepared by the hydrosilylation of trichlorosilane with the corresponding 1H,1H,2H-polyfluoro-1-alkene in the presence of hydrogen hexachloroplatinate (IV) , followed by reaction with sodium methoxide. The surface modification of glass plate was attempted using these products. High modification ability of the silane coupling agents and high oxidation resistance ability of the modified glass surface against nitric acid were observed. These results were confirmed by measuring the contact angles on the modified glass surface and the oxidized glass surface with water and oleic acid. In regard to water and oil repellency on the modified glass surface, CF_3(CF_2)_9CH_2CH_2Si(OCH_3)_3 displayd the highest ability, and the largest contact angles of water on the modified glass surface exhibited 118. From AFM measurement, the layr of the silane coupling agent on the modified glass surface should be composed of double- or triple-layr. We tried to modify the surface of some dental materials using CF_3(CF_2)_9CH_2CH_2Si(OCH_3)_3, and applied the silane coupling agent for the surface modification of a denture to provide stain-protecting ability. We have found that a silane coupling agent containing a long fluorocarbon chain, CF_3(CF_2)_9CH_2CH_2Si(OCH_3)_3, had a high degree of surface modification ability against these dental materials. The modified denture teeth displayd a heightened stain-protecting ability.