摘要
为制备1种接地网用碳纳米管改性导电防腐涂料,采用球磨工艺将填料分别分散在有机硅树脂和环氧树脂内制得了导电防腐涂料。将涂料喷涂固化,研究了涂层形貌和碳纳米管质量分数对涂层电导率、附着力以及耐蚀性能的影响。结果表明:碳纳米管在有机硅中分散均匀,在环氧内则存在团聚;2种涂层的渗流阈值均<1%,当碳纳米管质量分数为8%时,有机硅和环氧涂层电导率分别为1.3 S/cm和1.7×10^(-2) S/cm;少量的碳纳米管有助于提高涂层的内聚力,当碳纳米管质量分数>6%时,有机硅涂层的附着力与耐蚀性能都呈下降趋势,这种现象在环氧涂层中更为明显。与环氧树脂相比,有机硅树脂更适合作为碳纳米管改性导电防腐涂料的成膜剂,当碳纳米管质量分数为5%时,有机硅树脂涂层具有较好的综合性能。
In order to prepare a kind of conductive anticorrosion coating filled with carbon nanotubes which is suitable for grounding grid, we adopted ball milling process to disperse fillers in epoxy resin and organic silicone resin, respectively, to produce conductive anticorrosion paint. After the paint being sprayed and cured,we investigated the coatings morphologies and the effects of carbon nanotubes mass fraction on coatings conductivity, adhesion, and anticorrosive properties. Results show that the carbon nanotubes distribute homogeneously in organic silicon resin, but agglomerate in epoxy. The percolation thresholds of two types of coatings are lower than 1%, the coatings conductivity of organic silicon and epoxy respectively reach 1.3 S/cm and 1.7×10^-2 S/cm when the mass fraction of carbon nanotubes is 8%. A small amount of carbon nanotubes can help improve the cohesion of organic silicon coatings, but the adhesion and anticorrosive properties begin degradation when the mass fraction of carbon nanotubes reaches 6%, this phenomenon is more obvious in epoxy coatings. Compared with epoxy, the organic silicon resin is more appropriate as film former in the process of producing conductive anticorrosion coatings, and the organic silicon coating has optimum comprehensive performance when the mass fraction of carbon nanotubes is 5%.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2016年第5期1571-1577,共7页
High Voltage Engineering
基金
国家电网公司科技项目~~
关键词
接地网
碳纳米管
导电防腐涂料
微观形貌
电导率
附着力
耐蚀性能
grounding grid
carbon nanotubes
conductive anticorrosion coating
micro-morphology
electrical conductivity
adhesion
corrosion resistance
