摘要
为了制备超疏水性纳米复合材料并研究它对覆冰的影响,利用高速搅拌和超声波分散相结合的方法,将经过偶联剂处理的纳米SiO2-x均匀分散在具有疏水性能的氟化有机硅树脂中。基于改善溶胶-凝胶法,将低表面能的薄膜表面构建成粗糙结构并进行修饰。借助扫描电镜(SEM)、x射线能谱(EDS)分析和接触角影像分析法等测试手段,对它们的测试结论和实验数据进行了比较研究。采用偶联剂处理过的SiO2-x粒子对涂膜表面进行修饰后,所得的材料存在nm级与μm级相结合的双层微观阶层结构,具有超疏水性能。还研究了表层粒径的形状对材料微观结构、表面粗糙度和疏水性能的影响。在小型人工覆冰实验室内对该涂料涂覆的马口铝板、导线进行了覆冰试验对比研究及脱冰试验。结果表明,在覆冰实验室模拟自然界覆冰条件下,具有粗糙结构的超疏水性涂料能明显改变覆冰性质,降低覆冰层与基体的粘结力,也能明显降低冰与导线的脱冰力矩。
In order to study icing of the film which presents hydrophobic, super-hydrophobic nanoscale interface ma- terials were successfully prepared, several kinds of nanocomposite particle with different coupling agents were col- lected. High-speed blending combined with ultrasonic technique was used to disperse nanocomposite silica particle u- niformly in fluorinated organosilicon coatings, which present hydrophobic and low surface energy. The coatings mod- ified by nanocomposite silica were densely granulated. Their test results and experimental data above were further compared and studied using SEM and EDS and Image Analysis etc. The test results prove that film modified by nano SiO2 -x disposed with RSiX4 presents super-hydrophobic. It is revealed that the hierarchical irregularly structure with a low roughness factor and high air-trapped ratio is indispensable for super-hydrophobic surface of film. The aluminium sheets and conductors covered with hydrophobic nano-composite coating through icing were researched in the small artificial icing lab. The results indicate that, when super-hydrophobic film is characterized with granulation, the form of icing is transformed from glaze to rime. The adhesive tension with the icing and the ice-shedding torque are obviously reduced.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2009年第9期2256-2263,共8页
High Voltage Engineering
基金
国家重点基础研究发展计划(973计划)(2009CB724500)~~
关键词
超疏水性
多级结构
纳米二氧化硅粒子
溶胶-凝胶
表面形貌
覆冰
super-hydrophobicity
hierarchical structure
nanocomposite silica particle
sol-gel
surface morphology
icing
