采用超声分散纳米SiO2,同时添加分散剂保护新生纳米SiO2粒子,在一定程度上改善了纳米SiO2团聚的现象,并将分散好的纳米SiO2加入氟碳面漆,用以改性氟碳面漆的性能。选用硅烷偶联剂KH570、CH超分散剂、BYK-163三种分散剂。结果表明,超声分散时间为30min左右,硅烷偶联剂KH570分散纳米SiO2的效果最好;纳米SiO2改性后的氟碳面漆,机械性能与耐化学试剂性能均有了较大改善,各项性能均达到国家标准。
The agglomeration of nano-SiO2 particles was improved by ultrasonic dispersion and adding dispersing agents to protect the newborn nano-particles.The dispersed nano-SiO2 particles can improve the fluorocarbon finish property.The experimental results indicate that the best time of ultrasonic dispersion was about 30 minutes,and KH570,CH hyper-dispersant and BYK-163 were selected as dispering agents,the performance of KH570 was the best.Both the mechanical properties and the ability to resist chemical reagent of modified fluorocarbon finish were improved and could meet the national standard.
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