Surface Active to Non-Surface Active Transition and Micellization Behaviour of Zwitterionic Amphiphilic Diblock Copolymers: Hydrophobicity and Salt Dependency
Abstract
:1. Introduction
2. Experimental Section
2.1. Materials
2.2. Synthesis
2.3. 1H Nuclear Magnetic Resonance (1H NMR)
2.4. Gel Permeation Chromatography (GPC)
2.5. Surface Tension Measurements
2.6. Foam Formation and Foam Height Measurements
2.7. Light Scattering Measurements
2.8. Specific Refractive Index Increment Measurements (dn/dcp)
3. Results and Discussion
3.1. Hydrophobicity and Salt-Dependent Air–Water Interfacial Properties
3.2. Effect of Salt on CMC
3.3. Influence of Salt on Hydrodynamic Radius
3.4. Hydrophobicity, Salt and Block Length-Dependent Aggregation Number and Second Virial Coefficient of Micelles
4. Conclusions
Supplementary Materials
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Diblock Copolymer | Zd a | PDI b | ||
---|---|---|---|---|
Water | 1 MNaCl | Water | 1 MNaCl | |
n-BMA35-b-GLBT55 | 1.6 | 1.5 | 0.16 | 0.13 |
n-BMA62-b-GLBT117 | 2.1 | 2 | 0.13 | 0.13 |
n-BMA101-b-GLBT156 | 1.5 | 1.5 | 0.11 | 0.08 |
n-BMA42-b-GLBT300 | 2.7 | 2.6 | 0.2 | 0.19 |
EHA22-b-GLBT55 | 3.5 | 3.2 | 0.29 | 0.28 |
EHA15-b-GLBT117 | 4.4 | 4.5 | 0.29 | 0.29 |
EHA20-b-GLBT156 | 3.9 | 3.9 | 0.3 | 0.32 |
EHA19-b-GLBT300 | 3.5 | 3.7 | 0.19 | 0.21 |
Diblock Copolymer | Nagg a | A2 × 105 (cm3·mol·g−2) b | Rg (nm) c | β d | ||||
---|---|---|---|---|---|---|---|---|
Water | 1 MNaCl | Water | 1 MNaCl | Water | 1 MNaCl | Water | 1 MNaCl | |
n-BMA35-b-GLBT55 | 555 | 146 | 4.7 | 0.25 | 65.9 | 58.1 | 0.031 | 0.02 |
n-BMA101-b-GLBT156 | 117 | 32 | 2.7 | 1.0 | 58.8 | 55.8 | 0.032 | 0.01 |
EHA22-b-GLBT55 | 891 | 152 | −3.5 | −17.6 | 203.3 | 172.8 | 0.1 | 0.03 |
EHA20-b-GLBT156 | 91 | 13 | −3.1 | −88.1 | 218.7 | 139.8 | 0.032 | 0.01 |
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Murugaboopathy, S.; Matsuoka, H. Surface Active to Non-Surface Active Transition and Micellization Behaviour of Zwitterionic Amphiphilic Diblock Copolymers: Hydrophobicity and Salt Dependency. Polymers 2017, 9, 412. https://doi.org/10.3390/polym9090412
Murugaboopathy S, Matsuoka H. Surface Active to Non-Surface Active Transition and Micellization Behaviour of Zwitterionic Amphiphilic Diblock Copolymers: Hydrophobicity and Salt Dependency. Polymers. 2017; 9(9):412. https://doi.org/10.3390/polym9090412
Chicago/Turabian StyleMurugaboopathy, Sivanantham, and Hideki Matsuoka. 2017. "Surface Active to Non-Surface Active Transition and Micellization Behaviour of Zwitterionic Amphiphilic Diblock Copolymers: Hydrophobicity and Salt Dependency" Polymers 9, no. 9: 412. https://doi.org/10.3390/polym9090412