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    beta-lactoglobulin microgel layers at the surface of aqueous solutions

    Year: 2022

    Journal: J. Mol. Liq., Volume 351, APR 1

    Authors: Noskov, Boris A.; Rafikova, Anastasiya R.; Milyaeva, Olga Yu

    Organizations: Russian Science Foundation [21-13-00039]; Russian Science Foundation [21-13-00039] Funding Source: Russian Science Foundation

    Keywords: beta-lactoglobulin microgel; Monolayer collapse; Dilational surface rheology; Atomic force microscopy adsorption kinetics; Microgel purification

    The spread and adsorbed layers of beta-lactoglobulin (BLG) microgel were investigated by the dilational surface rheology, atomic force microscopy and optical microscopy. It is shown that only careful purification of the BLG microgel dispersion gives a possibility to observe distinctions between the properties of spread layers of BLG nano- and micro particles on the one hand, and the properties the layers of BLG molecules on the other hand. The BLG particles do not have a thick and soft corona like poly(N-isopropylacryl) microgel. The fluctuations of the surface pressure of the BLG microgel layers at high surface compressions are a consequence of a special collapse mechanism, which has not observed earlier for the layers of both soft and rigid nano- and microparticles. (C) 2022 Elsevier B.V. All rights reserved.
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