Preparation of Thermo-Responsive Poly(ionic liquid)s-Based Nanogels via One-Step Cross-Linking Copolymerization
Abstract
:1. Introduction
2. Results and Discussion
2.1. Synthesis of Biimidazolium Salt-Based Monomers
2.2. Characterization of BIm Salt-Based Nanogels and Their Thermo-Responsive Behavior
Entry | Monomer and Cross-Linker | Feed Ratio (Molar Ratio) a | Dh (nm) | PDI | ξ-Potential (mV) |
---|---|---|---|---|---|
1 | [C6VIm]Br + EGDMA | 1:1 | precipitated | - | - |
2 | [C6VIm]Br + EGDMA | 3:1 | 159 | 0.28 | 11.5 |
3 | [C6VIm]Br + EGDMA | 5:1 | 137 | 0.26 | 12.4 |
4 | [C6VIm]Br + EGDMA | 10:1 | 103 | 0.43 | 14.1 |
5 | [C6VIm]Br + EGDMA | 15:1 | 71 | 0.09 | 18.1 |
6 | [C8VIm]Br + EGDMA | 10:1 | 125 | 0.36 | 13.5 |
7 | [C12VIm]Br + EGDMA | 10:1 | 148 | 0.45 | 11.9 |
8 | [C6VIm]Br + DVB | 3:1 | 111 | 0.39 | 14.6 |
9 | [C6VIm]Br + DVB | 5:1 | 88 | 0.29 | 16.2 |
10 | [C6VIm]Br + DVB | 10:1 | 47 | 0.33 | 17.1 |
2.3. Catalysis Performance of BIm Salt-Based Nanogels for the Cycloaddition Reaction
Entry | Catalyst b | Temperature (°C) | CO2 (MPa) | Yield (%) | Selectivity (%) |
---|---|---|---|---|---|
1 | 3:1 | 160 | 3 | 99.7 | 89.0 |
2 | 5:1 | 160 | 3 | 99.8 | 93.0 |
3 | 10:1 | 160 | 3 | 100 | 100 |
4 | 15:1 | 160 | 3 | 100 | 96.4 |
5 | 5:1 | 120 | 3 | 87.7 | 99.3 |
6 | 5:1 | 140 | 3 | 96.1 | 96.1 |
7 | 5:1 | 150 | 3 | 99.5 | 99.2 |
8 | 5:1 | 160 | 2 | 95.7 | 97.3 |
9 | 5:1 | 160 | 5 | 99.7 | 100 |
3. Experimental Section
4. Conclusions
Supplementary Materials
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Zhang, J.; Liu, J.; Zuo, Y.; Wang, R.; Xiong, Y. Preparation of Thermo-Responsive Poly(ionic liquid)s-Based Nanogels via One-Step Cross-Linking Copolymerization. Molecules 2015, 20, 17378-17392. https://doi.org/10.3390/molecules200917378
Zhang J, Liu J, Zuo Y, Wang R, Xiong Y. Preparation of Thermo-Responsive Poly(ionic liquid)s-Based Nanogels via One-Step Cross-Linking Copolymerization. Molecules. 2015; 20(9):17378-17392. https://doi.org/10.3390/molecules200917378
Chicago/Turabian StyleZhang, Jing, Jingjiang Liu, Yong Zuo, Rongmin Wang, and Yubing Xiong. 2015. "Preparation of Thermo-Responsive Poly(ionic liquid)s-Based Nanogels via One-Step Cross-Linking Copolymerization" Molecules 20, no. 9: 17378-17392. https://doi.org/10.3390/molecules200917378