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

在六氯铂酸氢(IV)存在下，三氯硅烷与相应的1H，1H，2H-聚氟-1-烯进行硅氢化反应，合成了含氟碳链的硅烷偶联剂CF_3(CF_2)_9CH_2CH_2Si(OCH_3)_3，(CF_3)_2CF(CF_2)_8CH_2CH_2Si(OCH_3)_3和CF_3(CF_2)_9(C_6H_4)C_2H_4Si(OCH_3)_3然后与甲醇钠反应。利用这些产品对玻璃板进行了表面改性的尝试。结果表明，硅烷偶联剂具有较强的改性能力，改性后的玻璃表面具有较高的抗硝酸氧化能力。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，证实了上述结果。在改性玻璃表面上，CF_3(CF_2)_9CH_2CH_2Si(OCH_3)_3表现出最强的拒水拒油能力，水在改性玻璃表面的最大接触角为118。原子力显微镜测量表明，硅烷偶联剂在改性玻璃表面的层应为双层或三层。我们尝试用CF3(CF2)9CH2CH2Si(OCH3)3对一些口腔材料进行表面改性，并将硅烷偶联剂应用于义齿的表面改性，以提供保护污渍的能力。我们发现一种含长氟碳链的硅烷偶联剂CF3(CF2)9CH2CH2Si(OCH3)3对这些牙科材料具有很强的表面改性能力。改进后的义齿具有更强的抗污损能力。

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.