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15 results on '"BUJNOWICZ, KRZYSZTOF"'

1. Development of a Layer Made of Natural Fibers to Improve the Ecological Performance of the Face Mask Type II

Author

Mańkowski, Jerzy, primary, Zimniewska, Małgorzata, additional, Gieparda, Weronika, additional, Romanowska, Barbara, additional, Kicińska-Jakubowska, Anna, additional, Kołodziej, Jacek, additional, Foksowicz-Flaczyk, Joanna, additional, Rojewski, Szymon, additional, Bujnowicz, Krzysztof, additional, Przybylska, Patrycja, additional, Kwiatkowska, Edyta, additional, Alam, MD Masud, additional, Różańska, Wanda, additional, Wawro, Aleksandra, additional, and Hołderna-Kędzia, Elżbieta, additional

Published
2023
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3. Effective Use of Flax Biomass in Biorefining Processes.

Author

Batog, Jolanta, Wawro, Aleksandra, Gieparda, Weronika, Bujnowicz, Krzysztof, Foksowicz-Flaczyk, Joanna, Rojewski, Szymon, Chudy, Magdalena, and Praczyk, Marcin

Subjects
FLAX, ETHANOL as fuel, BIOMASS, MOLDS (Fungi), RHEOLOGY, SODIUM hydroxide, ETHANOL, POLYETHYLENE terephthalate
Abstract

Flax is one of the few plants that are entirely a source of raw materials for further production. Promising directions for the use of flax biomass may be the production of bioenergy in the form of 2G biofuels and the production of "green" composites. The aim of the study is to compare the biomass of fiber flax, linseed and dual-purpose varieties of cultivated flax (Linum usitatissimum L.) susceptibility to the biorefining processes. In the first stage of the research, based on the results of yield structure features and biometric measurements of plants, the most optimal flax line was selected for the fiber flax, linseed and dual purpose. Next, the forms of flax were pretreated with sodium hydroxide (NaOH), the chemical composition was determined and SEM images were taken. The obtaining of bioethanol process SFF (simultaneous saccharification and fermentation) was carried out. In addition, biodegradable polymers were modified with flax biomass, shapes were prepared, and the rheological and mechanical properties, as well as microbiological activity of biocomposites, were determined. The highest concentration of ethanol (8.72 g·L−1) and the greatest susceptibility to mold fungi of the biocomposites were obtained for the fiber flax variety PET 16/20. [ABSTRACT FROM AUTHOR]

Published
2023
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13. Flammability of vulcanizates of diene rubbers

Author

Rybiński, Przemysław, primary, Janowska, Grażyna, additional, Kucharska-Jastrząbek, Agnieszka, additional, Pająk, Agnieszka, additional, Wójcik, Iwona, additional, Wesołek, Dorota, additional, and Bujnowicz, Krzysztof, additional

Published
2011
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14. Boronated (co)polystyrene: monomer reactivity ratios, thermal behavior and flammability.

Author

Wiacek, Malgorzata, Wesolek, Dorota, Rojewski, Szymon, Bujnowicz, Krzysztof, and Schab‐Balcerzak, Ewa

Subjects
POLYSTYRENE, MONOMERS, FLAMMABILITY, FIREPROOFING agents, COPOLYMERS
Abstract

Chemical modification based on incorporation of flame retardants (FR) into the polymer backbone was used in order to reduce polystyrene flammability. Boronated styrenes such as 4-vinylphenylboronic acid (StB(OH)2) and 6-methyl-2-(4-vinylphenyl)-1,3,6,2-dioxazaborocane-4,8-dione (StBcyclo) were applied as reactive FR. Homo- and copolymers of boronated styrenes and styrene (St) were synthesized with different feed ratios using free radical polymerization. It yielded in series of (co)polymers with various amounts of StB(OH)2 and StBcyclo (5-20% mol/mol of St). Copolymer compositions were determined by 1H NMR. The relative reactivity ratios of system St-StBcyclo were determined by applying the Jaacks method. Glass transition temperature and thermal stability of obtained (co)polymers were determined from DSC and TGA analysis, respectively. The pyrolysis combustion flow calorimeter was applied as a tool for assessing the flammability of the synthesized (co)polymers. Copyright © 2014 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]

Published
2015
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