Modification of wood with copolymers based on glycidyl methacrylate and alkyl methacrylates for imparting superhydrophobic properties

2021 ◽  
pp. 51636
Author(s):  
OlgaV. Kolyaganova ◽  
Viktor V. Klimov ◽  
Evgeny V. Bryuzgin ◽  
Mahn D. Le ◽  
Valentin O. Kharlamov ◽  
...  
Keyword(s):  
Glycidyl Methacrylate ◽  
Alkyl Methacrylates

scholarly journals WATER-REPELLENT PROPERTIES OF WOOD MODIFIED WITH GLYCIDYL METHACRYLATE COPOLYMERS

2020 ◽  
pp. 72-81
Author(s):  
O. V. Kolyaganova ◽  
Sh. Zh. Aristangaliev ◽  
A. A. Rysukhina ◽  
E. B. Bryuzgina ◽  
V. V. Klimov ◽  
...  
Keyword(s):  
Water Absorption ◽  
Water Permeability ◽  
Glycidyl Methacrylate ◽  
Absorption Index ◽  
Water Repellent ◽  
Methacrylate Copolymers ◽  
Water Drops ◽  
Alkyl Methacrylates

The paper considers the features of modification of wood (pine) with reactive copolymers based on glycidyl methacrylate and fluorine (alkyl) methacrylates to impart water-repellent properties. Such modification provides the achievement of superhydrophobic properties and a decrease in the water permeability of the material due to a smaller spot of contact of water drops with the surface. Wood water absorption index reduced by 3 times.

The Superhydrophobic State Stability of Coatings Based on Copolymers of Glycidyl Methacrylate and Alkyl Methacrylates on Cotton Fabric Surface

2020 ◽  
Vol 21 (5) ◽  
pp. 1032-1038
Author(s):  
Evgeny Bryuzgin ◽  
Viktor Klimov ◽  
Manh Duc Le ◽  
Alexander Navrotskiy ◽  
Ivan Novakov
Keyword(s):  
Cotton Fabric ◽  
Glycidyl Methacrylate ◽  
Fabric Surface ◽  
Alkyl Methacrylates

scholarly journals Biodegradation Control of Chitosan Materials By Surface Modification With Copolymers of Glycidyl Methacrylate and Alkyl Methacrylates

2021 ◽  
Author(s):  
Evgeny Bryuzgin ◽  
Ekaterina Bryuzgina ◽  
Vitaliya Yartseva ◽  
Kristina Belina ◽  
Olga Makevnina ◽  
...  
Keyword(s):  
Glycidyl Methacrylate ◽  
Raw Materials ◽  
Protective Layer ◽  
Contact Angles ◽  
Wound Dressings ◽  
Material Surface ◽  
High Porosity ◽  
Hydrophobic Coatings ◽  
Modified Chitosan ◽  
Alkyl Methacrylates

Abstract Chitosan is one of promising polymer from natural polysaccharides, which is an environmentally friendly compound from renewable raw materials. Chitosan has biodegradability, biocompatibility, and exhibits antimicrobial, antibacterial, and other activities. In this article, we report the first use of copolymers based on glycidyl methacrylate and (fluoro)alkyl methacrylates as material surface wettability modifiers based on a chitosan, and we show that grafting of copolymers allows an increase in the hydrophobicity of films with contact angles up to 114° and up to 154° for aerogels. The resulting chitosan aerogels have high porosity with a pore size of 100–200 µm and the pore walls are 0.6–0.7 µm-thick film formations. Our study of lyophilic properties of modified chitosan substrates showed a change in the hydrophobicity of the materials as a function of length of the hydrocarbon radical in the side groups of (fluoro)alkyl methacrylates in the copolymers. Additionally, the rate of biodegradation of the resulting materials decreased with an increase in the number of hydrophobic groups in the modifier. Obtained chitosan materials with hydrophobic coatings have potential as a protective layer for wound dressings with an extended service life.

Reesterification of ethyl acetate by propanol catalysed by glycidyl methacrylate copolymers containing sulphonic acid groups

1981 ◽  
Vol 46 (8) ◽  
pp. 1941-1946 ◽  
Author(s):  
Karel Setínek
Keyword(s):  
Liquid Phase ◽  
Ethyl Acetate ◽  
Kinetic Study ◽  
Gas Phase ◽  
Nonlinear Regression ◽  
Kinetic Data ◽  
Glycidyl Methacrylate ◽  
Kinetic Equations ◽  
Methacrylate Copolymers ◽  
Styrene Divinylbenzene

A series of differently crosslinked macroporous 2,3-epoxypropyl methacrylate-ethylenedimethacrylate copolymers with chemically bonded propylsulphonic acid groups were used as catalysts for the kinetic study of reesterification of ethyl acetate by n-propanol in the liquid phase at 52 °C and in the gas phase at 90 °C. Analysis of kinetic data by the method of nonlinear regression for a series of equations of the Langmuir-Hinshelwood type showed that kinetic equations which describe best the course of the reaction are the same as for the earlier studied sulphonated macroporous styrene-divinylbenzene copolymers. Compared types of catalysts differ, however, in the dependence of their activity on the degree of crosslinking of the copolymer used.

Complexes of copper(II) and nickel(II) with a Schiff base bonded to a polymeric support

1983 ◽  
Vol 48 (7) ◽  
pp. 2021-2027 ◽  
Author(s):  
Eliška Kálalová ◽  
Olga Populová ◽  
Štěpánka Štokrová ◽  
Pavel Stopka
Keyword(s):  
Magnetic Properties ◽  
Schiff Base ◽  
Coordination Sphere ◽  
Polymer Matrix ◽  
Glycidyl Methacrylate ◽  
Epr Spectra ◽  
Polymeric Support ◽  
Tetrahedral Configuration ◽  
Paramagnetic Complexes

Copper(II) and nickel(II) ions were bonded in complexes of salicylideneimine type on a glycidyl methacrylate-ethylenedimethacrylate copolymer. The geometry of the complexes on the polymer was studied by measuring their magnetic properties, EPR spectra, and ultraviolet-visible spectra.Only paramagnetic complexes possessing a pseudo-tetrahedral configuration were found. The effect of the polymer matrix and of the immobility of the bonded Schiff base on the distortion of the coordination sphere of the central ion is discussed.

Association of Graft Copolymers of Alkyl Methacrylates with α-Methyl-ω-hydroxy-poly(oxyethylene) ethacrylates

1995 ◽  
Vol 60 (11) ◽  
pp. 1971-1985 ◽  
Author(s):  
Čestmír Koňák ◽  
Zdeněk Tuzar ◽  
Pavla Kopečková ◽  
Joseph D. Andrade ◽  
Jindřich Kopeček
Keyword(s):  
Light Scattering ◽  
Graft Copolymers ◽  
Water Solution ◽  
Pure Water ◽  
Solution Properties ◽  
Monomer Composition ◽  
Special Procedure ◽  
Methyl Cellosolve ◽  
Hexyl Methacrylate ◽  
Alkyl Methacrylates

Solution properties of the statistical copolymers of alkyl methacrylates (AMA) with α-methyl-ω-hydroxy-poly(oxyethylene) methacrylates (MPOEMA) (nonionic polysoaps) were studied using static and dynamic ligh scattering as a function of monomer composition and concentration in aqueous and methyl cellosolve solutions. The solubility of the copolymers in water was found to be dependent on molar contant of AMA. While copolymers with low content of hexyl methacrylate (HMA) (0 and 20 mole %) were directly soluble in water, forming true solutions with a low content of large swollen aggregates, copolymers with a higher content of HMA or lauryl methacrylate (LMA) were not directly dispersable in water. A special procedure, the stepwise dialysis from methyl cellosolve solutions against water, had to be used to prepare them in the pseudomicellar form. The copolymers were directly soluble in methyl cellosolve and its water solution containing up to 60 vol.% of water. Nevertheless, the light scattering experiments were dominated by light scattering of swollen particles of aggregated copolymer molecules. The copolymers were not soluble in the mixtures containing 70-100 vol.% of water. Paramaters of aggregates in the mixture with 60 vol.% of water and in pure water were found to be very similar.

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