纳米SiO2颗粒稳定非水相泡沫的排液行为研究

doi:10.3969/j.issn.2097-2806.2024.07.001

Abstract

Abstract:

Non-aqueous foams have a wide range of applications in petrochemical industry, food industry, daily chemical industry and biomedical industry. However, the low surface tension and low dielectric constant of non-aqueous solvents lead to the difficulty in forming stable foams. The unique advantages of nano-silica particles in foaming and foam stabilization are getting more and more attention. In this work, the surface wettability of 14 nm nano-silica particles was modified with dichlorodimethylsilane （DCDMS）. The effects of wettability of these nano-silica particles on the drainage behaviors of several non-aqueous foams were studied. It was found that, with the increase of the polarity of non-aqueous solvents, the foaming performance showed a gradually increasing trend. The drainage process for non-aqueous foam could be divided into three stages: The initial stage, the middle stage, and the end stage. With the increase of the surface wettability of nano-silica particles, the half-life of foam was first increased and then decreased. The half-life of foams of highly polar solvents could reach 45 min, and the half-life of foams of moderately polar solvents could reach 60 min. Under optical microscope, it was observed that with drainage, the bubble size of foams gradually increased and the shape gradually became polygonal.

Key words: nano-silica particle, wettability, non-aqueous foam, drainage curve, drainage half-life

CLC Number:

TQ423

Tingting Gao, Yongli Yan, Suiwang Zhang, Yu Chen, Bingcheng He. Study on the drainage behavior of non-aqueous foams stabilized by nano-silica particles[J].China Surfactant Detergent & Cosmetics, 2024, 54(7): 751-758.

Figures/Tables 7

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References 34

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Study on the drainage behavior of non-aqueous foams stabilized by nano-silica particles

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