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Article

Preparation of Thermo-Responsive Poly(ionic liquid)s-Based Nanogels via One-Step Cross-Linking Copolymerization

1
Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education
2
Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Jason P. Hallett
Molecules 2015, 20(9), 17378-17392; https://doi.org/10.3390/molecules200917378
Received: 11 August 2015 / Revised: 11 September 2015 / Accepted: 14 September 2015 / Published: 18 September 2015
(This article belongs to the Special Issue Ionic Liquids in Organic Synthesis)
In this study, thermo-responsive polymeric nanogels were facilely prepared via one-step cross-linking copolymerization of ethylene glycol dimethacrylate/divinylbenzene and ionic liquid (IL)-based monomers, 1,n-dialkyl-3,3′-bis-1-vinyl imidazolium bromides ([CnVIm]Br; n = 6, 8, 12) in selective solvents. The results revealed that stable and blue opalescent biimidazolium (BIm)-based nanogel solutions could be obtained without any precipitation when the copolymerizations were conducted in methanol. Most importantly, these novel nanogels were thermo-response, and could reversibly transform to precipitation in methanol with temperature changes. Turbidity analysis and dynamic light scatting (DLS) measurement illustrated that PIL-based nanogel solutions presented the phase transform with upper critical solution temperature (UCST) in the range of 5–25 °C. The nanogels were characterized using Fourier transform infrared (FTIR), thermogravimetric analyses (TGA), and scanning electron microscopy (SEM). In addition, BIm-based nanogels could also be used as highly active catalysts in the cycloaddition reaction of CO2 and epoxides. As a result, our attributes build a robust platform suitable for the preparation of polymeric nanomaterials, as well as CO2 conversion. View Full-Text
Keywords: ionic liquids; thermo-response; nanogels; cross-linking polymerization; UCST; CO2 conversion ionic liquids; thermo-response; nanogels; cross-linking polymerization; UCST; CO2 conversion
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MDPI and ACS Style

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

AMA Style

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 Style

Zhang, 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

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