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Study on the Strengthening Mechanism of a MIBC–PEG Mixed Surfactant on Foam Stability

[Image: see text] In the flotation process, the frother, which is typically a surfactant, can be added to the pulp to reduce the surface tension and create stable foam. Currently, the nonionic mixed surfactant is widely employed as the frother for fine coal flotation. In this study, we focused on ex...

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Autores principales: Xu, Mengdi, Guo, Fangyu, Bao, Xicheng, Gui, Xiahui, Xing, Yaowen, Cao, Yijun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10399173/
https://www.ncbi.nlm.nih.gov/pubmed/37546650
http://dx.doi.org/10.1021/acsomega.3c02863
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author Xu, Mengdi
Guo, Fangyu
Bao, Xicheng
Gui, Xiahui
Xing, Yaowen
Cao, Yijun
author_facet Xu, Mengdi
Guo, Fangyu
Bao, Xicheng
Gui, Xiahui
Xing, Yaowen
Cao, Yijun
author_sort Xu, Mengdi
collection PubMed
description [Image: see text] In the flotation process, the frother, which is typically a surfactant, can be added to the pulp to reduce the surface tension and create stable foam. Currently, the nonionic mixed surfactant is widely employed as the frother for fine coal flotation. In this study, we focused on examining the foam properties of a mixed surfactant comprising short-chain methyl isobutyl carbinol (MIBC) and long-chain polyethylene glycol-1000 (PEG). Analytical techniques such as surface tension measurement, dynamic foam stability measurement, bubble morphology observation, and foam film drainage measurement were used to investigate the foam properties in single and mixed surfactant solution from a macroscopic scale to a microscopic scale. The surface tension results indicated that PEG exhibited higher surface activity than MIBC, and the addition of PEG to MIBC resulted in a significant reduction in solution surface tension. The dynamic foam stability analysis revealed that the incorporation of a small amount of PEG into MIBC solution notably improved foam stability. Furthermore, the addition of PEG to the MIBC solution led to a shift in the bubble size distribution curve from a “double peak” to a “single peak” shape. This shift indicated a substantial reduction in bubble size, indicating an enhanced inhibition of bubble coalescence. Additionally, the liquid film drainage rate was significantly slowed down, and the stability of the liquid film was improved upon the addition of PEG to MIBC. This improvement can be attributed to the synergistic effect of MIBC and PEG molecules adsorbed at the gas–liquid interface. The synergistic effect of mixed MIBC–PEG was due to the additional surface tension gradient created by the difference in surface activity between PEG and MIBC. This surface tension gradient enhances the Marangoni flow of surfactant molecules, thereby improving the self-healing ability of the liquid film and increasing its stability.
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spelling pubmed-103991732023-08-04 Study on the Strengthening Mechanism of a MIBC–PEG Mixed Surfactant on Foam Stability Xu, Mengdi Guo, Fangyu Bao, Xicheng Gui, Xiahui Xing, Yaowen Cao, Yijun ACS Omega [Image: see text] In the flotation process, the frother, which is typically a surfactant, can be added to the pulp to reduce the surface tension and create stable foam. Currently, the nonionic mixed surfactant is widely employed as the frother for fine coal flotation. In this study, we focused on examining the foam properties of a mixed surfactant comprising short-chain methyl isobutyl carbinol (MIBC) and long-chain polyethylene glycol-1000 (PEG). Analytical techniques such as surface tension measurement, dynamic foam stability measurement, bubble morphology observation, and foam film drainage measurement were used to investigate the foam properties in single and mixed surfactant solution from a macroscopic scale to a microscopic scale. The surface tension results indicated that PEG exhibited higher surface activity than MIBC, and the addition of PEG to MIBC resulted in a significant reduction in solution surface tension. The dynamic foam stability analysis revealed that the incorporation of a small amount of PEG into MIBC solution notably improved foam stability. Furthermore, the addition of PEG to the MIBC solution led to a shift in the bubble size distribution curve from a “double peak” to a “single peak” shape. This shift indicated a substantial reduction in bubble size, indicating an enhanced inhibition of bubble coalescence. Additionally, the liquid film drainage rate was significantly slowed down, and the stability of the liquid film was improved upon the addition of PEG to MIBC. This improvement can be attributed to the synergistic effect of MIBC and PEG molecules adsorbed at the gas–liquid interface. The synergistic effect of mixed MIBC–PEG was due to the additional surface tension gradient created by the difference in surface activity between PEG and MIBC. This surface tension gradient enhances the Marangoni flow of surfactant molecules, thereby improving the self-healing ability of the liquid film and increasing its stability. American Chemical Society 2023-07-19 /pmc/articles/PMC10399173/ /pubmed/37546650 http://dx.doi.org/10.1021/acsomega.3c02863 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Xu, Mengdi
Guo, Fangyu
Bao, Xicheng
Gui, Xiahui
Xing, Yaowen
Cao, Yijun
Study on the Strengthening Mechanism of a MIBC–PEG Mixed Surfactant on Foam Stability
title Study on the Strengthening Mechanism of a MIBC–PEG Mixed Surfactant on Foam Stability
title_full Study on the Strengthening Mechanism of a MIBC–PEG Mixed Surfactant on Foam Stability
title_fullStr Study on the Strengthening Mechanism of a MIBC–PEG Mixed Surfactant on Foam Stability
title_full_unstemmed Study on the Strengthening Mechanism of a MIBC–PEG Mixed Surfactant on Foam Stability
title_short Study on the Strengthening Mechanism of a MIBC–PEG Mixed Surfactant on Foam Stability
title_sort study on the strengthening mechanism of a mibc–peg mixed surfactant on foam stability
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10399173/
https://www.ncbi.nlm.nih.gov/pubmed/37546650
http://dx.doi.org/10.1021/acsomega.3c02863
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