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Effect of Architecture of Thermoresponsive Copolymer Brushes on Switching of Their Adsorption Properties

Title data

Marschelke, Claudia ; Puretskiy, Nikolay ; Raguzin, Ivan ; Melnyk, Inga ; Ionov, Leonid ; Synytska, Alla:
Effect of Architecture of Thermoresponsive Copolymer Brushes on Switching of Their Adsorption Properties.
In: Macromolecular Chemistry and Physics. (2019) . - Art.Nr. 1900030.
ISSN 1521-3935
DOI: https://doi.org/10.1002/macp.201900030

Abstract in another language

Herein, the effect of architecture of stimuli-responsive polymer brushes on the switching of colloidal particle adsorption is reported. Thermoresponsive copolymer brushes containing positively charged amino groups are used and investigated how negatively charged colloidal particles electrostatically adsorb onto them. The distribution of charged groups (block or random copolymer architecture) and the conformation of the polymer chains (extended or collapsed state) are varied. It is found that the strongest adsorption is achieved at high fractions of charged groups in the brushes, while the amount of adsorbed particles is independent of the polymer chain conformation; that is, the adsorption of particles cannot be switched. On the contrary to this, the most pronounced switching of adsorption is achieved at low fractions of charged/adhesive groups in the brushes when the adsorption of particles is weak. The lowest fraction of charged/adhesive groups (one group per few polymer chains) can be exclusively achieved by random copolymerization and not by block copolymers. An explanation of the adsorption behavior of colloidal particles on switchable brushes is proposed.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: adsorption; polymer brushes; switching
Institutions of the University: Faculties > Faculty of Engineering Science > Professur Biofabrikation
Faculties > Faculty of Engineering Science > Professur Biofabrikation > Professur Biofabrikation - Univ.-Prof. Dr. Leonid Ionov
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 15 Apr 2019 06:49
Last Modified: 15 Apr 2019 06:49
URI: https://eref.uni-bayreuth.de/id/eprint/48683