Adsorption Behavior and Wettability of Rhodochrosite Surface: Effect of C18 Fatty Acid Unsaturation
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Methods
2.2.1. Measurements of Surface Tension
2.2.2. Measurements of Contact Angle
2.2.3. AFM Analysis
3. Results and Discussion
3.1. Self-Assembly of Fatty Acid in Aqueous Solution
3.2. Wettability of Rhodochrosite
3.3. Adsorption at Rhodochrosite-Water and Air-Water Interface
3.3.1. Dependence of Wettability and Surface Tension
3.3.2. Relationship between the Adhesion and Surface Tension
3.3.3. Work of Adhesion
3.4. Structural Dependence of Fatty Acid on the Wettability of Rhodochrosite Surface
3.5. Morphology of Adsorbed Fatty Acid on Rhodochrosite Surface
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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C18 Fatty Acid | Structure and Degree of Saturation | Theoretically Calculated Length/nm | Limiting Area of Monolayer (Å2) | Intermolecular Distance in Monolayer (Å) | Melting Temperature (℃) a |
---|---|---|---|---|---|
SA | 18:0 | 2.62–2.66 [36] | 20 [36,37] | 4.47 [38] | 69–71 |
OA | 18:1; (cis)9 | 2.48–2.52 [36] | 41 [36,39] | 6.40 [38] | 13–14 |
LA | 18:2; (cis)9,12 | 2.40–2.44 [36] | 48 [36,40] | 6.93 [38] | −5~−1 |
ALA | 18:3; (cis)9,12,15 | -b | -b | -b | −11~−10 |
Fatty Acid | Premicellar Concentration (mol/L) | CMC (mol/L) | γCMC (mN/m) |
---|---|---|---|
SA | 1 × 10−6 | 1 × 10−4 | 33.915 |
OA | 1 × 10−5 | 1 × 10−3 | 24.298 |
LA | 1 × 10−5 | 1 × 10−3 | 29.298 |
ALA | 1 × 10−5 | 1 × 10−3 | 30.631 |
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Shen, Z.; Zhang, Q.; Li, X.; Chen, Q. Adsorption Behavior and Wettability of Rhodochrosite Surface: Effect of C18 Fatty Acid Unsaturation. Minerals 2020, 10, 905. https://doi.org/10.3390/min10100905
Shen Z, Zhang Q, Li X, Chen Q. Adsorption Behavior and Wettability of Rhodochrosite Surface: Effect of C18 Fatty Acid Unsaturation. Minerals. 2020; 10(10):905. https://doi.org/10.3390/min10100905
Chicago/Turabian StyleShen, Zhihui, Qin Zhang, Xianbo Li, and Qianlin Chen. 2020. "Adsorption Behavior and Wettability of Rhodochrosite Surface: Effect of C18 Fatty Acid Unsaturation" Minerals 10, no. 10: 905. https://doi.org/10.3390/min10100905