Amphiphilic PVCL/TBCHA microgels: From synthesis to characterization in a highly selective solvent.

Autor: Gumerov RA; Physics Department, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow 119991, Russian Federation; DWI - Leibniz Institute for Interactive Materials e.V, Forckenbeckstraße 50, Aachen 52074, Germany., Gau E; DWI - Leibniz Institute for Interactive Materials e.V, Forckenbeckstraße 50, Aachen 52074, Germany., Xu W; DWI - Leibniz Institute for Interactive Materials e.V, Forckenbeckstraße 50, Aachen 52074, Germany; Functional and Interactive Polymers, Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Aachen 52056, Germany., Melle A; DWI - Leibniz Institute for Interactive Materials e.V, Forckenbeckstraße 50, Aachen 52074, Germany., Filippov SA; Physics Department, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow 119991, Russian Federation., Sorokina AS; Physics Department, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow 119991, Russian Federation., Wolter NA; Functional and Interactive Polymers, Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Aachen 52056, Germany., Pich A; DWI - Leibniz Institute for Interactive Materials e.V, Forckenbeckstraße 50, Aachen 52074, Germany; Functional and Interactive Polymers, Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Aachen 52056, Germany; Aachen Maastricht Institute for Biobased Materials (AMIBM), Maastricht University, Brightlands Chemelot Campus, Urmonderbaan 22, 6167 RD Geleen, the Netherlands. Electronic address: pich@dwi.rwth-aachen.de., Potemkin II; Physics Department, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow 119991, Russian Federation; DWI - Leibniz Institute for Interactive Materials e.V, Forckenbeckstraße 50, Aachen 52074, Germany; National Research South Ural State University, Chelyabinsk 454080, Russian Federation. Electronic address: igor@polly.phys.msu.ru.
Jazyk: angličtina
Zdroj: Journal of colloid and interface science [J Colloid Interface Sci] 2020 Mar 22; Vol. 564, pp. 344-356. Date of Electronic Publication: 2019 Dec 28.
DOI: 10.1016/j.jcis.2019.12.123
Abstrakt: Thermoresponsive copolymer microgels based on the biocompatible monomer N-vinylcaprolactam (VCL) and the hydrophobic comonomer 4-tert-butylcyclohexylacrylate (TBCHA) with highly tunable comonomers ratio were for the first time synthesized by miniemulsion polymerization. Their physical properties in aqueous solution and at the solid interface were characterized using dynamic light scattering (DLS), atomic force microscopy (AFM) and dissipative particle dynamics (DPD) simulations. The results show a significant decrease of the swelling rate of the obtained microgels with an increase of the amount of the hydrophobic comonomer. In the case when the fraction of TBCHA is equal or higher than the fraction of VCL, the microgels become almost insensitive to the temperature changes, and the amount of water inside the microgels appeared to be diminishingly small. In the opposite case, if the VCL fraction is major, the copolymer microgels preserve their softness and deformability while being adsorbed onto a solid surface. At the same time, all samples have shown a good colloidal stability and a low polydispersity in size. Thus, the presented polymerization technique is applicable for the fabrication of microgels using hydrophobic monomers, which are not accessible by conventional precipitation polymerization. We demonstrate that the mechanical properties and the temperature-responsiveness of the copolymer microgels can be precisely adjusted by the content of the hydrophobic comonomer.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2020 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: