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Investigation of surfactant surface tension and its correlation with temperature and concentration Cheng, Li Yaw (Michael); Wei, Su Min (Lisa)
Abstract
Surface tension is a property that defines the energy per unit area of a liquid-gas interface. The purpose of this study is to investigate the surface properties and the process of aggregation of surfactant micelles in detergents. By using a drop-weight method, the surface tension of detergent solutions was determined under standard pressure condition 1 bar. A 100% concentrated detergent solution was subject to heating. Data analysis showed that surface tension decreased linearly with increasing temperature, as represented by the equation ƴ = – 0.1766 mN/(m⋅K)(x) + 94.654 mN/m, where x is temperature. When subjected to variations in concentration, surface tension of the detergent decreased until reaching the critical micelle concentration, as modelled by the segmented linear regression ƴ = – 0.565 mN/(m⋅%)(x) + 61.7 mN/m when x < 50%, and ƴ = 33.45 mN/m when x ≥ 50%, where x is concentration.
Item Metadata
Title |
Investigation of surfactant surface tension and its correlation with temperature and concentration
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Creator | |
Date Issued |
2012
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Description |
Surface tension is a property that defines the energy per unit area of a liquid-gas interface. The purpose of this study
is to investigate the surface properties and the process of aggregation of surfactant micelles in detergents. By using a
drop-weight method, the surface tension of detergent solutions was determined under standard pressure condition 1
bar. A 100% concentrated detergent solution was subject to heating. Data analysis showed that surface tension decreased
linearly with increasing temperature, as represented by the equation ƴ = – 0.1766 mN/(m⋅K)(x) + 94.654
mN/m, where x is temperature. When subjected to variations in concentration, surface tension of the detergent decreased
until reaching the critical micelle concentration, as modelled by the segmented linear regression ƴ = – 0.565
mN/(m⋅%)(x) + 61.7 mN/m when x < 50%, and ƴ = 33.45 mN/m when x ≥ 50%, where x is concentration.
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Genre | |
Type | |
Language |
eng
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Series | |
Date Available |
2012-06-07
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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DOI |
10.14288/1.0107233
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URI | |
Affiliation | |
Campus | |
Peer Review Status |
Unreviewed
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Scholarly Level |
Undergraduate
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Rights URI | |
Aggregated Source Repository |
DSpace
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Rights
Attribution-NonCommercial-NoDerivatives 4.0 International