表面活性剂类型和用量对闭孔三聚氰胺泡沫的影响

研究吐温80和十二烷基苯磺酸钠(SDBS)两种类型表面活性剂及SDBS用量对闭孔三聚氰胺泡沫的影响。用三聚氰胺、甲醛合成三聚氰胺树脂,并制备泡沫样品进行测试。树脂表面张力测试结果显示相同用量下,相比于吐温80,SDBS使树脂表面张力更小,且随着SDBS用量增加,树脂张力呈现先减小后不变的趋势。SEM、力学性能测试分析结果显示,表面活性剂用量为3%时,相比于吐温80,SDBS制得泡沫孔径小且均匀。随着SDBS用量增加,泡沫孔径减小,均匀度先提高后降低,泡壁膜撕裂严重。受泡沫结构影响,SDBS用量为3%时,泡沫的压缩性能最好。

Effect of Surfactant Types and Concentration on Closed-Cell Melamine Foam

This paper investigates effect of different types of surfactant (Tween80 and SDBS) and SDBS concentration on closed-cell melamine foam. Melamine-formaldehyde (MF) resin was synthesized then the foam samples were prepared based on the MF resin. The surface tension test result showed that the surface tension of resin by addition of SDBS was lower than that of Tween80. The surface tension decreased at first and then unchanged afterwards with SDBS concentration increasing. The SEM photos and mechanical test results showed that when surfactant concentration was 3%, cell diameter of the foam with SDBS was smaller and more uniform than that of foam with Tween80. With the SDBS concentration increasing, cell diameter decreased, the uniformity of the size distribution increased initially and decreased afterwards and tear damage of cell wall was serious. By the impact of the foam structure, the compression property of the foam was optimal with the SDBS concentration of 3%.