LI Minghua^1,2，GAO Lei¹，JIANG Jiajia¹

(1.School of Energy Materials and Chemical Engineering；Anhui Provincial Engineering Research Center for Green Coatings High-performance Additives，Hefei University,Hefei 230601,China;2.Hefei Aigo Additives Technology Co.,Ltd.,Hefei 230601,China)

Abstract:In order to promote the performance problem of the insufficiency of waterborne acrylic resin coatings,a green physical modified water-based nano-silica dispersion was successfully prepared by regulating the ultrasonic time and solid content of nano-particles dispersed in water by using ultrasonic technology.Then,it could be used to mix with waterborne acrylic resin coatings to study the effect.The results show that the smallest effective diamter D₅₀ of the prepared water-based nano-silica dispersion is obtained under the condition of 2 h ultrasonic time and nano-silica at 10% mass fraction and storage stability is observed more than 90 d.After adding water-based nano-silica dispersion at 5% mass fraction to waterborne acrylic resin coatings 120 bought from market,the contact angle is improved from 94.3°to 105.1°,abrasion resistance numbers is increased to more than 10 from less than 5,and the scratch load is enhanced from 0.94 kg to 2.15 kg.

Keywords:ultrasonic technology;nano-silica;dispersion;waterborne acrylic resin coatings

中图分类号：TQ630.6+7                          文献标志码：A

文章编号：1008-5548(2022)05-0057-07

DOI:10.13732/j.issn.1008-5548.2022.05.008

收稿日期： 2022-03-16， 修回日期：2022-05-22，在线出版时间：2022-08-04 11:50。

基金项目：安徽省科技厅自然科学基金项目，编号：1808085ME144。

第一作者简介：李明华(1981—)，男，副教授，博士，研究方向为绿色涂料高性能助剂。E-mail:liminghua@hfuu.edu.cn。