TY  - JOUR
A1  - Doering, Ulrike
A1  - Grigoriev, Dmitry
A1  - Tapio, Kosti
A1  - Rosencrantz, Sophia
A1  - Rosencrantz, Ruben R.
A1  - Bald, Ilko
A1  - Böker, Alexander
T1  - About the mechanism of ultrasonically induced protein capsule formation
JF  - RSC Advances : an international journal to further the chemical sciences / Royal Society of Chemistry
N2  - In this paper, we propose a consistent mechanism of protein microcapsule formation upon ultrasound treatment. Aqueous suspensions of bovine serum albumin (BSA) microcapsules filled with toluene are prepared by use of high-intensity ultrasound following a reported method. Stabilization of the oil-in-water emulsion by the adsorption of the protein molecules at the interface of the emulsion droplets is accompanied by the creation of the cross-linked capsule shell due to formation of intermolecular disulfide bonds caused by highly reactive species like superoxide radicals generated sonochemically. The evidence for this mechanism, which until now remained elusive and was not proven properly, is presented based on experimental data from SDS-PAGE, Raman spectroscopy and dynamic light scattering.
Y1  - 2021
U6  - https://doi.org/10.1039/d0ra08100k
SN  - 2046-2069
VL  - 11
IS  - 27
SP  - 16152
EP  - 16157
PB  - RSC Publishing
CY  - London
ER  - 
TY  - JOUR
A1  - Stojanović, Ivan
A1  - Židov, Bruno
A1  - Travkova, Oksana
A1  - Grigoriev, Dmitry
T1  - Enhanced protective performance of waterborne, microcontainers-doped coatings in harsh environments
JF  - Progress in organic coatings : an international journal
N2  - In this study, the corrosion inhibitors Zinc oleate and 8-Hydroxyquinoline were successfully encapsulated using an interfacial polyaddition method. As such they were dispersed at different concentrations within the waterborne coating matrix. The resulting composite coatings were applied to the low carbon steel substrates. Successful synthesis and morphological characteristics of microcontainers loaded with inhibitors were confirmed using various characterization techniques. Scanning electron microscopy, dynamic light scattering, and thermogravimetric measurements are techniques used to define the surface, dimensional, and dispersive characteristics of containers, and the share of encapsulated inhibitors. The release study defined the discharge kinetics of the corrosion inhibitor from the microcontainers dispersed freely in an aqueous medium. Electrochemical impedance spectroscopy was used to determine the anticorrosive performance of the samples continuously exposed to various corrosive environments of salt and humidity chambers and NaCl solution. Special emphasis was placed on adhesion testing and visual observations during the exposure period. Significant improvements have been noted in terms of corrosion resistance, which, however, depend on the type of inhibitor used, the concentration of the containers embedded in the coating matrix and on the characteristics of the corrosive environment.
KW  - Self-protecting coatings
KW  - Interfacial polyaddition
KW  - Inhibitor loaded
KW  - microcontainers
KW  - Corrosion inhibitors
Y1  - 2021
U6  - https://doi.org/10.1016/j.porgcoat.2021.106273
SN  - 0300-9440
SN  - 1873-331X
VL  - 157
PB  - Elsevier Science
CY  - Amsterdam [u.a.]
ER  -