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LCST and UCST in one : Double thermoresponsive behavior of block copolymers of poly(ethylene glycol) and poly(acrylamide-co-acrylonitrile)
Title data
Käfer, Florian ; Liu, Fangyao ; Stahlschmidt, Ullrich ; Jérôme, Valérie ; Freitag, Ruth ; Karg, Matthias ; Agarwal, Seema:
LCST and UCST in one : Double thermoresponsive behavior of block copolymers of poly(ethylene glycol) and poly(acrylamide-co-acrylonitrile).
In: Langmuir.
Vol. 31
(2015)
Issue 32
.
- pp. 8940-8946.
ISSN 1520-5827
DOI: https://doi.org/10.1021/acs.langmuir.5b02006
Official URL:
Abstract in another language
The change in thermoresponsive behavior from a single phase transition of UCST-type of an acrylamide-acrylonitrile copolymer (AAm-co-AN) to a double responsive behavior (LCST-UCST-type) in water by the introduction of a poly(ethylene glycol) (PEG) block is highlighted in the present work. The polymer is synthesized in a simple way by free-radical polymerization of acrylamide and acrylonitrile using a poly(ethylene glycol) (PEG) macro-azoinitiator. The dual thermoresponsive behavior was observed in a wide range of concentration repeatable for many cycles with very small hysteresis. Static light scattering (SLS) and dynamic light scattering (DLS) together with turbidity photometry and transmission electron microscopy confirmed a unique phase transition behavior due to the temperature dependent change in the morphology from micelles to agglomerates and back to micelles. The low cytotoxicity and two-in-one thermoresponsive behavior makes the polymer promising for biomedical applications in the future.
Further data
Item Type: |
Article in a journal
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Refereed: |
Yes |
Additional notes: |
PMID: 26202833
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Institutions of the University: |
Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry I Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors > Chair Physical Chemistry I - Univ.-Prof. Dr. Stephan Förster Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II > Chair Macromolecular Chemistry II - Univ.-Prof. Dr. Andreas Greiner Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors > Junior Professor Colloidal Systems - Juniorprof. Dr. Matthias Karg Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Process Biotechnology Faculties > Faculty of Engineering Science > Chair Process Biotechnology > Chair Process Biotechnology - Univ.-Prof. Dr. Ruth Freitag Profile Fields Profile Fields > Advanced Fields Profile Fields > Advanced Fields > Polymer and Colloid Science Research Institutions Research Institutions > Research Centres Research Institutions > Research Centres > Bayreuth Institute of Macromolecular Research - BIMF Research Institutions > Research Centres > Bayreuth Center for Colloids and Interfaces - BZKG |
Result of work at the UBT: |
Yes |
DDC Subjects: |
500 Science > 500 Natural sciences 500 Science > 540 Chemistry 600 Technology, medicine, applied sciences > 620 Engineering |
Date Deposited: |
27 Jul 2015 08:22 |
Last Modified: |
14 Mar 2023 06:56 |
URI: |
https://eref.uni-bayreuth.de/id/eprint/17181 |
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