摘要
采用一种简单的方法制备出了硅橡胶超疏水性表面;将模具内表面做成一定的粗糙度;按照常规成型工艺,将液体硅橡胶浇注在模具内使其固化,待固化完毕后脱去模具,得到不同粗糙度的表面。经过接触角测量仪测定和扫描电子显微镜分析,结果表明:当硅橡胶表面粗糙度Ra=6.63μm时,在其表面形成了类似于荷叶的乳突结构;在乳突表面还有亚微米级的小颗粒存在,形成了微米亚微米两级的粗糙结构,材料表面与水的静态接触角为153.5°,滚动角为8°,材料具有超疏水性;当硅橡胶表面粗糙度Ra<6.63μm时,材料表面的静态接触角随着表面粗糙度的增加而增加,当Ra=6.63μm,静态接触角出现最大值153.5°。当表面粗糙度Ra>6.63μm,材料表面的静态接触角随着表面粗糙度的增加而减小。
In this paper, we report on a simple method to prepare superhydrophobic surface on silicone rubber. Different surface roughness was formed along the mold inner surfaces. Then the liquid silicone rubber was molded in the mold with the standard molding processing. After consolidation was accomplished completely and the mold was released, surface with different roughness was obtained. By exterminating contact angles and scanning electron microscopy observation, we found when the roughness of the surface Ra was 6.33 um, a similar mastoid microstructure with lotus leaves was formed on the silicone rubber surface. There were some sub-micron particles on the mastoid. Micron and sub-micron rough structures were formed. The static contact angle obtained was 153.5° and the rolling angle was 8°. When the surface roughness Ra was less than 6.63um, the static surface contact angle increases with the surface roughness increasing, when the surface roughness Ra was 6.63 um, the static contact angle was largest. The maximum value was 153.5°. When the surface roughness Ra was more than 6.63um, surface static contact angle decreases with the surface roughness increasing.
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2009年第6期30-35,共6页
China Surface Engineering
关键词
表面粗糙度
静态接触角
滚动角
超疏水
surface roughness
static contact angle
rolling angle
super hydrophobic
