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.
12 November 2024American Chemical Society
Langmuir
2024#40Issue 4523918 - 23929 pp.
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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Physics Department, Lomonosov Moscow State University, Moscow, 119991, Russian Federation
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, 141980, Russian Federation
Chemistry Department, Karaganda E.A. Buketov University, Karaganda, 100028, Kazakhstan
Chemistry Department, Lomonosov Moscow State University, Moscow, 119991, Russian Federation
Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, 119334, Russian Federation
Institute of Physics, Kazan Federal University, Kazan, 420008, Russian Federation
Physics Department
Frank Laboratory of Neutron Physics
Chemistry Department
Chemistry Department
Nesmeyanov Institute of Organoelement Compounds
Institute of Physics
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