透明隔热SiO_(2)气凝胶/水性聚氨酯复合涂料的制备及性能研究

Preparation and properties of transparent and thermal insulation SiO_(2)aerogels/waterborne polyurethane composite coatings

以水性聚氨酯乳液(WPU)为基体,引入SiO_(2)气凝胶(SA),制备了一种隔热性能优良的SA/WPU复合涂料,并探讨了SA用量对SA/WPU复合涂料性能的影响。结果表明,随着SA的加入,在保持透明度良好的条件下,复合涂料的隔热性能、附着力及硬度都得到提高。当复合涂料中SA含量为WPU基体固含量的20%时,复合涂料的隔热性能、附着力以及硬度相对最佳,可以获得综合性能优良的复合透明隔热水性聚氨酯涂料。

A SA/WPU composite coating with good thermal insulation was prepared by introducing SiO_(2)aerogel into waterborne polyurethane emulsion(WPU).The effects of the amount of SiO_(2)aerogels on the properties of SA/WPU composite coatings were discussed.The results showed that with the addition of SA,the thermal insulation,adhesion and hardness of the composite coatings were improved under the condition of maintaining good transparency.When the content of SiO_(2)in the composite coating was 20%of the solid content of WPU matrix,the thermal insulation performance,adhesion and hardness of the composite coating were relatively the best,and the composite transparent insulation waterborne polyurethane coating with excellent comprehensive performance could be obtained.