Tuning foam stability under flammable liquid fuel by inorganic nanoparticles

IF 5.3 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Liquids Pub Date : 2025-03-19 DOI:10.1016/j.molliq.2025.127429

Youjie Sheng , Yang Li , Wenzhi Ma , Siling Fan , Li Ma , Tiantian Wang , Qian Zhao , Yutong He

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引用次数: 0

Abstract

Foam stability under fuel action is one of the key parameters for firefighting foams to fight flammable liquid fuel fires with high efficiency. Foams stabilized by inorganic nanoparticles have promising applications in the development of environmentally friendly firefighting foams. This paper focuses on tuning foam stability under fuel action of environmentally friendly firefighting foams by inorganic nanoparticles. The foam dispersions were prepared with silica nanoparticles (nano-silica), short-chain fluorocarbon surfactants (FS-50), and nonionic hydrocarbon surfactants (APG-0810). Under fuel (n-heptane) action, the interaction of surfactants, nano-silica, and n-heptane, and the foam decay, foam drainage, and foam film stability of foam dispersions were investigated. Results indicated that nano-silica, surfactants, and n-heptane have strong interactions. With the increasing nano-silica concentration, the surface tension and viscosity of foam dispersions increased, and the conductivity and foaming ability decreased. Nano-silica can effectively delay drainage and volume decay of APG-0810/FS-50 foam under liquid fuel, and the effect is more obvious with the increase of nano-silica concentration. Furthermore, the single vertical film thinning dynamic is accelerated as fuel is added but decelerated as nano-silica concentration increases. Under n-heptane action, the optimum nano-silica concentration for improving foam stability is 5 %. The results of this paper can further enrich the studies of environmentally friendly firefighting foam stabilized by nanoparticles under fuel action.

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泡沫在燃料作用下的稳定性是消防泡沫高效扑灭易燃液体燃料火灾的关键参数之一。无机纳米粒子稳定泡沫在开发环保型消防泡沫方面具有广阔的应用前景。本文的重点是利用无机纳米颗粒调节环保型消防泡沫在燃料作用下的泡沫稳定性。采用纳米二氧化硅（nano-silica）、短链碳氟化合物表面活性剂（FS-50）和非离子烃类表面活性剂（APG-0810）制备了泡沫分散体。在燃料（正庚烷）作用下，研究了表面活性剂、纳米二氧化硅和正庚烷的相互作用以及泡沫分散体的泡沫衰减、泡沫排出和泡沫膜稳定性。结果表明，纳米二氧化硅、表面活性剂和正庚烷具有很强的相互作用。随着纳米二氧化硅浓度的增加，泡沫分散体的表面张力和粘度增加，传导性和发泡能力降低。纳米二氧化硅能有效延缓 APG-0810/FS-50 泡沫在液体燃料下的排水和体积衰减，随着纳米二氧化硅浓度的增加，效果更加明显。此外，随着燃料的添加，单层垂直膜变薄的动态会加快，但随着纳米二氧化硅浓度的增加，单层垂直膜变薄的动态会减慢。在正庚烷作用下，提高泡沫稳定性的最佳纳米二氧化硅浓度为 5%。本文的研究结果可进一步丰富燃料作用下纳米颗粒稳定的环保型消防泡沫的研究。

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来源期刊

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.