硅溶胶含量对UV固化水性木器涂料漆膜质量的影响

Influence of silica sol content on quality of waterborne UV-curable wood coatings

采用硅溶胶对UV固化水性木器涂料进行改性,并对改性后的UV固化水性木器涂料涂层的力学性能（耐磨性、硬度、附着力和抗冲击性能）和光学性能进行测试,旨在通过改性改善UV固化水性木器涂料漆膜的力学性能和光学性能,满足市场对水性绿色涂料的需求。试验结果表明：当硅溶胶的含量为1%（质量分数）,紫外灯为3盏,干燥时间为20 min时,UV固化水性木器涂料漆膜的力学性能达到最佳,其耐磨性、硬度、附着力和抗冲击强度分别达到0106 g、H级、3级和90 kg·cm,但是当硅溶胶的含量大于1%时,漆膜的耐磨性、硬度、附着力、抗冲击性反而下降;光泽度的测试结果表明,涂层的光泽度随着硅溶胶含量的升高而下降,当硅溶胶含量为2%-6%时,涂层呈现亚光光泽度。该改性工艺步骤简洁、条件可控、价格低廉,且能满足日常生活中对UV固化水性木器涂料的需求。

The UV curing water-borne wood coatings were modified by silica sol, and the mechanical properties （wear resistance, hardness, adhesion, and anti-impact performance and optical properties） of the modified coatings were ex- amined. This paper was aimed to develop the modified waterborne UV-curable wood coatings with high performance to meet the market requirements. The experimental results showed that when 1% silicon sol content （ mass ratio） , 3 UV lamp, and 20 min drying time were used, the optimal mechanical properties （wear resistance of 0. 106 g, hardness of H, adhesion of 3 and impact strength of 90 kg. cm） of the UV curing coatings were achieved. However, when the content of silica sol was higher than 1%, the wear resistance, hardness, adhesion and impact resistance of the coating de- creased. Gloss test results showed that, the gloss of the coating decreased with the increase in content of silica sol, and when the content of the silica sol was 2%-6%, the coating presented the matt gloss. The modification process of UV cu- ring water-borne wood coatings is simple, controllable conditions, low cost, and has a promising market future.