黄原胶和纳米二氧化硅对无氟泡沫性能的影响

Effect of xanthan gum and nano silica on the properties of fluorine-free surfactant mixed solution foam

纳米粒子、高分子聚合物稳定泡沫的独特优势使其成为解决泡沫稳定性的研究热点。本文探索了亲水二氧化硅纳米颗粒(NPs)、高分子聚合物黄原胶(XG)对无氟泡沫分散液的发泡性能、泡沫稳定性及铺展性等泡沫性能的影响。研究结果表明,NPs和XG对泡沫稳定性有显著影响。与NPs相比,添加XG有助于增强泡沫稳定性,但对泡沫分散液发泡性能有抑制。NPs添加量为3.0%(质量分数)时,泡沫分散液的发泡能力得到提高。同时添加NPs和XG时,控制二者添加浓度可在稳定泡沫过程中产生协同效应。在铺展过程中,加入NPs、XG后泡沫分散液黏度增加,使泡沫分散液在汽油表面的铺展有不同程度的减缓,但对灭火产生不利影响。

The unique advantages of nanoparticles and polymer stabilized foam make it a research hotspot to solve foam stability.In this paper,the effects of hydrophilic silica nanoparticles(NPs)and polymer xanthan gum(XG)on foaming properties,foam stability and spread ability of fluorine-free foam dispersion were explored.The results showed that NPs and XG significantly affected the stability of foam.Compared with NPs,the addition of XG helped to enhance foam stability,but inhibited the foaming performance of foam dispersion.When the mass fraction of NPS was 3.0%,the foaming ability of foam dispersion was improved.When NPs and XG were used together,the additive concentration was controlled,and there was a synergistic effect on the stability of foam.During the spreading process,the viscosity of foam dispersion increased after added NPs and XG that made the spreading speed of foam dispersion on the heptane surface slow down to varying degrees,but it had adversely effect on fire fighting.