摘要
通过分散剂表面改性的方法,应用高速机械搅拌、高剪切砂磨和超声波分散等多种分散手段,制备了亲水型和疏水型两种类型纳米SiO2的水性浆料,通过常温沉降实验、Zeta电位测试以及透射电镜观察,研究了分散剂类型、用量、润湿剂类型、pH值、水性树脂和分散手段等多种因素对纳米SiO2水性浆料分散稳定性的影响。在最佳分散剂、润湿剂、pH值和加入水性树脂的条件下,通过砂磨和超声波分散相结合的手段,制得了分散稳定性良好的纳米SiO2水性浆料。
Two kinds of （hydrophilic and hydrophobic） nano-SiO2 aqueous suspension are obtained by several means such as high-speed mechanical stirring, sand grinding, ultrasonic wave dispersing and dispersant surface modification. The effect of type and amount of dispersant, type of wetting agent, pH value, waterborne resin and dispersing means on the dispersibility and stability of nano-SiO2 aqueous suspension are studied by means of sedimentation under room temperature, Zeta potential measurement and TEM. Nano-SiO2 aqueous suspension with good dispersibility and stability is prepared by combination of sand grinding and ultrasonic wave dispersing, adding optimum dispersant, wetting agent and waterborne resin under the optimum pH value.
出处
《涂料工业》
CAS
CSCD
2007年第B07期12-14,16-21,共9页
Paint & Coatings Industry
基金
国家自然科学基金项目(50073006)
广州市科技攻关重大项目(2005Z1-D0041)资助课题。
关键词
纳米SIO2
分散剂
表面改性
水性浆料
分散稳定性
nano-SiO2
dispersant
surface modification
aqueous suspension
dispersibility and stability
