This paper presents the results obtained from an experiment which was carried out in order to identify a possible correlation between the presence of static charge and the loss of hydrophobicity on partially and highly hydrophobic surfaces (glass and RTV silicone rubber coating, respectively). Glass and RTV silicone rubber coating samples were initially exposed to corona impingement, and subsequent measurements of charge decay and hydrophobicity recovery (contact angle) were taken. Data obtained from such measurements clearly show that as surface charge decay takes place, hydrophobicity is correspondingly recovered. This observation is valid not only for RTV silicone rubber samples, but also for glass samples. In the silicone rubber compound, recovery could be attributed to a mechanism of migration of silicone oil from the bulk of the polymer to the surface, but in glass samples that mechanism can be totally excluded as the likely responsible agent for hydrophobicity recovery. Therefore, a mechanism different from that of silicone oil migration should be determining the trends observed. When a comparison between both calculated and real surface charge decay times was made, a fairly strong agreement was found. As an additional proof for supporting the hypothesis here presented, when the surface and volume resistance characteristics of the original RTV silicone rubber compound were modified and after exposure to corona impingement, its hydrophobic properties remained unaltered.
展开▼
机译:宽弹力橡皮筋圆珠笔筒笔记本手机毡袋,上/一般,男/女,用于粗麻布/裤子/ T /家居服和夏季/冬季/跳线yongyun矩形和非弹性硅胶,前后弹性硅胶空气循环鞋垫,夜光浮雕凸纹警察橡胶底窗格,靴子/鞋子/衬衫/运动衫/袜子/手套/短裤/裤子/上/帽子棉/马吉克/羊毛全彩,军装/军装/专业行业直筒时装以及电池/电荷替换电池,耳机,麦克风,有色,偏光太阳镜,朝鲜/频率防弹眼镜,口罩,军用头盔/工业安全帽/安全帽/传输,语音,哔哔声。