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Your search keyword '"Verovkins, Anrijs"' showing total 2 results
Start Over Author "Verovkins, Anrijs" Topic acid hydrolysis
2 results on '"Verovkins, Anrijs"'

1. Properties of Recycled Polypropylene Based Composites Incorporating Treated Hardwood Sawdust.

Author

Shulga, Galia, Jaunslavietis, Jevgenijs, Ozolins, Jurijs, Neiberte, Brigita, Verovkins, Anrijs, Vitolina, Sanita, and Shakels, Vadims

Subjects
POLYPROPYLENE, WOOD waste, THERMOPLASTICS, PLASTICS, POLYOLEFINS
Abstract

The effect of different treatment of hardwood sawdust under mild conditions on contact angles, adhesion energy and water sorption was studied. A comparison of these indices for the hardwood treated sawdust and the composites filled with them was performed. The treatment promoted the compatibility between the recycled polypropylene and the hardwood filler. The inclusion of the lignin-based compatibiliser in the composite, containing the ammoxidised wood filler, essentially improved its mechanical properties. [ABSTRACT FROM AUTHOR]

Published
2016
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2. Short Fibre Filler from Wood Residue for Polymeric Composite Materials.

Author

SHULGA, Galia, NEIBERTE, Brigita, VEROVKINS, Anrijs, VITOLINA, Sanita, JAUNSLAVIETIS, Jevgenijs, and OZOLINS, Jurijs

Subjects
POLYMERIC composites, WOOD waste, FILLER materials, HYDROLYSIS, ZETA potential, CONTACT angle, MECHANICAL behavior of materials
Abstract

A wood residue - sawdust of the mechanical processing of aspen (Populus tremula) wood - was used to obtain a short fibre filler in the form of the modified microparticles < 250 μm for polymeric composite materials. To reduce energy input for wood size reduction and the activation of the lignocellulosic matrix for modification, low temperature acid hydrolysis of the residue under mild conditions was carried out. The effect of the pre-treatment parameters (acid concentration, hydrolysis duration, hydromodulus) on the fractional and chemical composition as well as on the zeta potential and contact angle of the obtained filler were studied. A comparison of the mechanical properties (tensile, bending) of the composites filled with initial sawdust and hydrolysed microparticles modified with a non-stoichiometric polyelectrolyte complex showed a pronounced improvement of the mechanical properties of the composites filled with modified wood microparticles. [ABSTRACT FROM AUTHOR]

Published
2016
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