Syntheses and reactions of metal organics. XXI. Syntheses of (1H,1H,2H,2H-polyfluoroalkyl)triisocyanate silanes and surface modification of glass
Syntheses and reactions of metal organics. XXI. Syntheses of (1H,1H,2H,2H-polyfluoroalkyl)triisocyanate silanes and surface modification of glass
复制标题
金属有机物的合成和反应。
DOI：
10.1016/0022-1139(96)03472-0
复制
发表时间：
1996
影响因子：
1.9
通讯作者：
T. Yamauchi
中科院分区：
文献类型：
--
作者：
N. Yoshino;Y. Kondo;T. Yamauchi
以三氯硅烷为原料，分别与相应的1H，1H，2 H，2 H，2 H-多氟-1-烯烃[CF 3（CF 2）nCH= CH 2，n = 3、5、7和9，在六氯铂酸氢（IV）的存在下，然后与氰酸银反应。并尝试了它们在玻璃表面改性中的应用。通过测定水和油酸对改性玻璃表面的接触角θ，发现异氰酸酯型硅烷偶联剂对玻璃的表面改性能力高于甲氧基型硅烷偶联剂。与甲氧基型硅烷偶联剂相比，使用较短的改性时间（1/6）和较低的硅烷偶联剂溶液浓度（1/10），获得了由每种硅烷偶联剂改性的玻璃表面上的最高接触角。研究了改性后的玻璃表面的抗氧化性和抗酸性，通过测量水和油酸的接触角降低来评价改性后的玻璃表面的抗氧化性和抗酸性，结果也高于甲氧基型硅烷偶联剂。
Four silane coupling agents having a fluorocarbon chain and three isocyanate groups as reactive centers, i.e. CF3(CF2)3CH2CH2Si(NCO)3(1), CF3(CF2)5CH2CH2Si(NCO)3(2), CF3(CF2)7CH2CH2Si(NCO)3(3) and CF3(CF2)9CH2CH2Si(NCO)3(4), were prepared by the hydrosilylation reaction of trichlorosilane with the corresponding 1H,1H,2H-polyfluoro-1-alkene [CF3(CF2)nCH=CH2, n = 3, 5, 7 and 9 in the presence of hydrogen hexachloroplatinate(IV), followed by reaction with silver cyanate. Their application to the surface modification of glass was attempted. From measurements of the contact angles θ for water and oleic acid against a modified glass surface, it was found that the isocyanate-type silane coupling agents have a higher surface modification ability toward glass than those of methoxy-type silane coupling agents. The highest contact angle on the glass surface modified by each silane coupling agent was obtained employing both a shorter modification time (1/6) and a lower concentration (1/10) of the silane coupling agent solution in comparison with those of methoxy-type silane coupling agents. The oxidation and acid resistance of the modified glass surface were investigated, and the results of the resistance abilities assessed by measuring the contact angle reduction of water and oleic acid were also higher than those of methoxy-type silane coupling agents.