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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).
University of Bayreuth, Macromolecular Chemistry II and Center for Colloids and Interfaces; University of Bayreuth, Physical Chemistry I; University of Bayreuth, Chair for Process Biotechnology
In: Langmuir. Vol. 31 (2015) Issue 32 . - pp. 8940-8946.
ISSN 1520-5827
DOI: https://doi.org/10.1021/acs.langmuir.5b02006

Official URL: Volltext

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
Refereed: Yes
Additional notes: PMID: 26202833
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 > 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 > Juniorprofessur Kolloidale Systeme - 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 > Advanced Fields > Polymer and Colloid Science
Research Institutions > Research Centres > Bayreuth Institute of Macromolecular Research - BIMF
Research Institutions > Research Centres > Bayreuth Center for Colloids and Interfaces - BZKG
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Juniorprofessur Kolloidale Systeme
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors
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: 19 Oct 2015 06:12
URI: https://eref.uni-bayreuth.de/id/eprint/17181