Authors
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Marschelke, C. ; Puretskiy, N. ; Raguzin, I. ; Melnyk, I. ; Ionov, L. ; Synytska, A.
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Title
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Effect of architecture of thermoresponsive copolymer brushes on switching of their adsorption properties
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Date
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12.06.2019
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Number
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56814
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Abstract
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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.
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Publisher
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Macromolecular Chemistry and Physics
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Wikidata
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Citation
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Macromolecular Chemistry and Physics 220 (2019) ID 1900030
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DOI
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https://doi.org/10.1002/MACP.201900030
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Tags
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