Study on the performance of fluorocarbon-hydrocarbon surfactant foam by gas source and nanoparticles
In this study,environmentally friendly foam disper-sions were prepared using twin-chain fluorocarbon surfactants(Gemini)and amphoteric hydrocarbon surfactants(LAMC)as core components.The influence of nanoscale SiO2 particles and the type of compressed gas on the foaming properties,stability,and spreading characteristics of the foam dispersion were investi-gated.The results revealed that nanoscale SiO2 particles exhibited molecular interactions with short-chain fluorocarbon surfactants,leading to an approximately 5.8%increase in the height of com-pressed nitrogen foam compared to compressed air foam when 3%nanoscale SiO2 particles were added within the experimental range.The foaming performance of the dispersion slightly de-creased after the addition of 3%nanoscale SiO2 particles.How-ever,foam stability significantly increased with the incorporation of nanoscale SiO2 particles,resulting in a 5%improvement in the stability of nitrogen foam compared to air foam.Nanoscale SiO2 particles formed a network-like structure,aggregating within the Plateau borders,effectively delaying foam drainage and coarsen-ing,thereby enhancing foam stability.Due to the inherent differ-ences in density and permeability of foam liquid films between ni-trogen and air,the average spreading rate of compressed air foam on the oil surface increased by 2.6%compared to compressed ni-trogen foam.The findings of this study provide theoretical guid-ance for the development and firefighting applications of environ-mentally friendly foam extinguishing agents containing nanoscale SiO2 particles.
short-chain fluorocarbon surfactantshydrocarbon sur-factantsnanoscale SiO2 particlescompressed gas sourcefoam performance
NETL
NSTL
万方数据
维普
