TiO_2@SiO_2纳米颗粒的制备及其在皮革表带防水中的应用
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摘要
采用工艺简单的共沉淀法制得了分散均匀的核壳型硅氧烷改性TiO_2@SiO_2纳米颗粒。考察了SiO_2用量、钛酸丁酯(TBOT)用量以及向Si O_2无水乙醇分散液中滴加含TBOT、甲基三乙氧基硅烷(MTES)和十二烷基硫酸钠(SDS)的乙醇溶液的时间对其制备的影响,得到优化条件为:SiO_2 10.0 g/L,去离子水0.30 mol/L,TBOT 0.02 mol/L,MTES 0.10 mol/L,SDS 1.0 g/L;滴加速率5 mL/min,滴加时间45~60 min。分别将含氟聚丙烯酸酯(FPA)、硅氧烷改性TiO_2@SiO_2纳米颗粒及十三氟辛基三乙氧基硅烷(G617)的1%无水乙醇分散液逐层喷涂在皮革表带表面,然后在40°C下烘干,制备了具有超疏水表面的皮革表带,并且其耐弯曲疲劳、耐摩擦、耐紫外光照射、耐腐蚀性能完全符合相关标准的要求。
The siloxane-modified TiO_2@SiO_2 nanoparticles, which were dispersed homogeneously with core–shell structure, were obtained simply by coprecipitation method. The effects of silica content, tetrabutyl orthotitanate(TBOT) content, and the time of dropping the absolute ethanol dispersion of SiO_2 into the ethanol solution containing TBOT, methyltriethoxysilane(MTES), and sodium dodecyl sulfate(SDS) on its preparation were studied. The optimal conditions were obtained as follows: SiO_2 10.0 g/L, deionized water 0.30 mol/L, TBOT 0.02 mol/L, MTES 0.10 mol/L, SDS 1.0 g/L, dropping speed 5 mL/min, and dropping time 45-60 min. The ethanol dispersions of 1 wt.% fluorinated polyacrylate(FPA), 1 wt.% modified TiO_2@SiO_2 nanoparticles, and 1 wt.% perfluorooctyltriethoxysilane(G617) were successively sprayed layer by layer on the surface of leather watchband, and then dried at 40 °C. It was found that the resistance of the superhydrophobic leather watchband prepared thereby to bending fatigue, friction, ultraviolet radiation, and corrosion meets the requirements of related standards.
The siloxane-modified TiO_2@SiO_2 nanoparticles, which were dispersed homogeneously with core–shell structure, were obtained simply by coprecipitation method. The effects of silica content, tetrabutyl orthotitanate(TBOT) content, and the time of dropping the absolute ethanol dispersion of SiO_2 into the ethanol solution containing TBOT, methyltriethoxysilane(MTES), and sodium dodecyl sulfate(SDS) on its preparation were studied. The optimal conditions were obtained as follows: SiO_2 10.0 g/L, deionized water 0.30 mol/L, TBOT 0.02 mol/L, MTES 0.10 mol/L, SDS 1.0 g/L, dropping speed 5 mL/min, and dropping time 45-60 min. The ethanol dispersions of 1 wt.% fluorinated polyacrylate(FPA), 1 wt.% modified TiO_2@SiO_2 nanoparticles, and 1 wt.% perfluorooctyltriethoxysilane(G617) were successively sprayed layer by layer on the surface of leather watchband, and then dried at 40 °C. It was found that the resistance of the superhydrophobic leather watchband prepared thereby to bending fatigue, friction, ultraviolet radiation, and corrosion meets the requirements of related standards.
引文
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[4]安秋凤,袁俊敏,亢玲娟,等.氟代丙烯酸酯共聚乳液FSLDH的成膜性、XPS表征与疏水性能[J].精细化工,2010,27(5):486-490.
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[7]高党鸽,段羲颖,吕斌,等.聚丙烯酸酯/纳米二氧化硅Pickering复合乳液的制备及性能[J].精细化工,2016,33(4):445-451.
[8]王彤,鲍艳.功能型聚丙烯酸酯/无机纳米复合皮革涂饰剂的研究进展[J].材料导报,2017,31(1):64-71.
[9]丁海燕,孙烈刚,冯永梅.有机硅在皮革化工材料中的应用[J].日用化学工业,2003,33(5):317-320.
[10]高静雅,杨清萍,卿宁,等.核壳结构丙烯酸酯聚合乳液的研究进展[J].材料导报,2015,29(6):144-148.
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