摘要
在分散稳定的纳米碳酸钙浓缩浆中,Sa10超分散剂牢固吸附在纳米碳酸钙表面并形成吸附层。纳米碳酸钙浓缩浆提高了环氧涂层的附着力和耐腐蚀性。吸附层的空间位阻效应阻碍纳米碳酸钙粒子间的聚集,且溶剂化层使纳米碳酸钙从极性向非极性转变,提高其与环氧树脂的相容性,保障其在环氧涂料中均匀性和稳定分散。因此,纳米碳酸钙浓缩浆增强了涂层的物理屏蔽作用,使涂层的耐蚀性提高。
In highly-dispersed and stable nano-CaCO3 concentrates, the Sal0 hyperdispersant firm ly adsorbed on the surface of CaCO3 nanoparticles and a adsorptive layer formed. Nano-CaCO3 concen trates improved the epoxy coating adhesion and the corrosion resistance. A adsorptive layer produced stedc effect and hindered the nano-CaCO3 particles to aggregate, while the solvatable layer transfered nano-CaCO3 particles from the polarity shift to nonpolarity, increasing their compatibility with the epoxy resin, which ensured their uniformity and stable dispersion in the epoxy coatings. Thereby nano-CaCO3 concentrates enhanced the physical shielding of the coatings, and improved the corrosion resistance.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2013年第4期425-431,共7页
Chinese Journal of Materials Research
基金
国家科技支撑计划2012BAB15B00
国家电网公司科技521820130014资助项目~~
关键词
材料失效与保护
纳米粒子
表面改性
超分散剂
输变电设备
防腐蚀材料
materials failure and protection, nanoparticles, surface modification, hyperdispersant,electric transmission and transformation equipment, anticorrosive materials
