李明华^1,2，高 磊¹，江佳佳¹

(1.合肥学院 能源材料与化工学院；安徽省绿色涂料高性能助剂工程研究中心，安徽 合肥 230601; 2.合肥爱高助剂科技有限公司，安徽 合肥 230601)

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。

摘要：为了提升水性丙烯酸树脂涂料的物理性能，利用超声技术，通过调控超声时间和纳米二氧化硅在水中的固含量，成功制备出一种绿色物理改性的水性纳米二氧化硅分散体添加剂；对分散体复合水性丙烯酸树脂木器涂料的效果进行研究。结果表明：在超声时间为2 h、纳米二氧化硅质量分数为10%的条件下，所制备的水性纳米二氧化硅分散体的中位粒径D₅₀最小，储存稳定时间大于90 d;在市售水性丙烯酸树脂木器涂料120中添加质量分数为5%的水性纳米二氧化硅分散体后，涂层与水接触角从94.3°增大到105.1°,耐磨转数从小于5增大到10以上，抗刮载荷从0.94 kg增大到2.15 kg。

关键词：超声技术；纳米二氧化硅；分散体；水性丙烯酸树脂涂料

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

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