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IMPROVEMENT OF OPERATIONAL PROPERTIES OF WOOD MATERIALS BY MODIFICATION THROUGHT THE PENETRATION METHOD

Radoykova, T.; Nenkova, S.; Georgieva, N.; Todorova, D.; Angelova, T.
Abstract:
The purpose of this work was to investigate the possibility of wood preservation by its modification with different substances through the penetration method and to study the impact of the process on some operational properties of the wood material. The experiments were conducted with poplar wood (samples 10x1x1 cm), which has low density with well-developed capillary system, good absorption capacity and belongs to low operational capacities tree species. Alkaline activated hydrolysis lignin (AAHL), Cu2S and Maleic anhydride (MA) were used to modify the poplar wood. The modification was carried out by the hot and cold bathing method. The modified samples were characterized by Fourier-transform infrared spectroscopy (FTIR), differential thermogravimetry (DTG) and thermogravimetric analysis (TG), water absorption and antibacterial activity against Bacillus subtilis (G+) and Escherichia coli K12 (G-). The IR spectra of the modified samples showed changes in the structure of wood samples as a result of physical and chemical processes. DTG and TG methods were used to monitor the change in samples weight as a function of temperature. By comparing the weight loss of the three types of modified wood samples it was found out that the used AAHL and Cu2S substances have a positive influence on the thermal stability, having retardant effect. The obtained results showed that samples modified with maleic anhydride and Cu2S have reduced water absorption. The investigated modified wood samples exhibit antibacterial activity against Escherichia coli K12. Best antibacterial effect was observed by sample modified with maleic anhydride.
SGEM Research areas:
Year:
2017
Type of Publication:
In Proceedings
Keywords:
Wood modification; penetration method; retardant effect; water resistance; antibacterial effect
Volume:
17
SGEM Book title:
17th International Multidisciplinary Scientific GeoConference SGEM 2017
Book number:
63
SGEM Series:
International Multidisciplinary Scientific GeoConference-SGEM
Pages:
579-586
Publisher address:
51 Alexander Malinov blvd, Sofia, 1712, Bulgaria
SGEM supporters:
Bulgarian Acad Sci; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Slovak Acad Sci; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; World Acad Sci; European Acad Sci, Arts & Letters; Ac
Period:
27 – 29 November, 2017
ISBN:
978-619-7408-29-4
ISSN:
1314-2704
Conference:
17th International Multidisciplinary Scientific GeoConference SGEM 2017, 27 – 29 November, 2017
DOI:
10.5593/sgem2017H/63/S26.073
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