Polymer Brushes Synthesized by the “Grafting-through” Approach: Characterization and Scaling Analysis

Avdeev, M.M.; Shibaev, A.V.; Maslakov, K.I.; Dvoryak, S.V.; Lokshin, B.V.; Gorshkova, Y.E.; Tropin, T.V.; Philippova, O.E.

Авторы: Avdeev Mikhail M., Shibaev Andrey V., Maslakov Konstantin I., Dvoryak Stanislav V., Lokshin Boris V., Gorshkova Yulia E., Tropin Timur V., Philippova Olga E.
Журнал: Langmuir
Том: 40
Номер: 45
Год издания: 2024
Издательство: American Chemical Society
Местоположение издательства: United States
Первая страница: 23918
Последняя страница: 23929
DOI: 10.1021/acs.langmuir.4c03088
Аннотация: In this study, a combined morphological and scaling analysis of brushes synthesized by the “grafting-through” method was performed, and the possibility of regulation of the thickness was revealed on an example of polyacrylamide brushes. The chemical composition of the surface in the proposed three-step approach was analyzed by photoelectron and infrared spectroscopy. It was shown that the thickness of the dried brush can be tuned in a controlled manner by varying the polymerization temperature. The scaling dependence of the thickness of the dried brushes d on the length of the polymer d ∼ Lv was obtained by comparing reflectometry and dynamic light scattering data. The value of the exponent v = 0.82 corresponds to a rather high grafting density, exceeding the density of mushroom-like (ν ∼ 1/3) brushes and approaching the value for stretched polymer brushes (ν ∼ 1). A 10-fold increase in the polymer molecular weight leads to a slight decrease in grafting density by a factor of 2, which suggests that the “grafting-through” approach allows obtaining brushes with a high grafting density independently of attached polymer chain length. Herein, the possibility of attachment of uniform polymer brush on large substrates with this approach was demonstrated, which means the scalability of the “grafting-through” technique. The considered approach opens up a simple way for surface modification with polymer nanolayers of controlled thickness.
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Polymer Brushes Synthesized by the “Grafting-through” Approach: Characterization and Scaling Analysisстатья

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