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- Title
Study on the non-aqueous foams stabilized by the modified nano-SiO<sub>2</sub> particles.
- Authors
Siqi Yao; Yongli Yan; Suiwang Zhang; Yu Chen; Bingcheng He
- Abstract
Non-aqueous foams have a wide range of applications in petroleum exploitation, functional materials, daily chemical industry, etc. However, the low interfacial tension and low dielectric constant of non-aqueous solvents lead to the difficulty in forming stable foams. Therefore, to solve the difficulty in foaming for non-aqueous systems, nano-SiO2 particles were prepared and characterized by TEM, FT-IR and XRD. Then the wettability of nano-SiO2 particles was modified with 3-glycidyloxypropyl trimethoxysilane (GPTMS), and the effects of nano-SiO2 particles of different wettability on the foaming performance of non-aqueous solvents were studied. The results showed that the contact angle of the particles could be regulated in the range from 34.7° to 116° by GPTMS modification. The surface tension of different solvents could be effectively reduced and the viscosity of the solvent systems was increased. When the mass fraction of particles was 7% and the particle size was 10 nm, the foam volume for non-aqueous solvents first increased and then decreased with the increase of the contact angle of nano-SiO2 particles, and the foam stability also first increased and then decreased with the increase of the contact angle of nano-SiO2 particles. In the formamide system, when the contact angle of particles was 92.3°, the foam volume could reach up to 12 mL, and the foam stability could reach 63 days. In the benzyl acetate system, when the contact angle of particles was 79.5°, the foam volume could reach up to 7 mL, and the foam stability could reach 47 days. In the decane system, when the contact angle of particles was 60.3°, the foam volume could reach up to 4 mL, and the foam stability could reach 8 days.
- Subjects
SILICON oxide; PERMITTIVITY; CHEMICAL industry; FOURIER transform infrared spectroscopy; X-ray diffraction
- Publication
China Surfactant Detergent & Cosmetics (2097-2806), 2024, Vol 54, Issue 8, p903
- ISSN
2097-2806
- Publication type
Article
- DOI
10.3969/j.issn.2097-2806.2024.08.004