摘要
以硅酸钠溶液为成膜基料,锌粉为颜填料,去离子水为溶剂,加入增稠剂,固化剂等助剂,制备钠水玻璃富锌涂料;应用红外光谱分析、流变学测量和耐液性观察,研究钠水玻璃富锌涂料的固化机理。结果发现,其固化机理主要是硅酸之间的脱水反应和锌离子对硅酸的交联;流变学测试显示,粘度随温度的上升先减后增,随时间增加;用光学显微镜观测固化后的富锌涂膜分别在水、稀酸和碱溶液中浸泡后的状态变化,定性应证了这个机理。
Using sodium silicate solution as the binder of zinc-rich coating, zinc powder as the filler, distilled water as the solvent, and adding thicker, solidifier, sodium silicate inorganic zinc-rich coatings were prepared. After that, the curing mechanism of the coating were studied through Fourier transform infrared spectral analysis, rheologieal measurement and solution-resistance observation. They also indicated that the curing mechanism of sodium silicate inorganic zinc-rich coating was mainly due to the chemical crosslinking between sodium silicate molecules through dehydrolyzing reaction and the associated silicic acid through zinc ions. Rheological measurement showed that the viscosities increased with time until solidification. While temperature ramping from 0 to 70 ℃, they initially decreased to minimum and then started to increase. After immersing the zinc-rich film in water, thin acid and alkali solution, an optical microscope was used to observe film change, whose results confirmed the validity of the mechanism.
出处
《应用化工》
CAS
CSCD
2007年第11期1076-1080,共5页
Applied Chemical Industry
基金
湖北省教育厅重点项目(D200718006)
关键词
固化机理
钠水玻璃
富锌涂料
curing mechanism
sodium water-glass
zinc-rich coating
