Drvna industrija, Vol. 69 No. 3, 2018.
Izvorni znanstveni članak
https://doi.org/10.5552/drind.2018.1717
Effects of Catalysts on Modulus of Rupture and Chemical Structure of Heat– Treated Wood
Ayhan Ozcifci
; Strojarski fakultet, Sveučilište u Aksarayu, Aksaray, Turska
Erkan Kokten
; Strojarski fakultet, Sveučilište u Karabuku, Karabuk, Turska
Nadir Ayrilmis
; Šumarski fakultet, Sveučilište u Istanbulu, Istanbul, Turska
Günay Özbay
orcid.org/0000-0002-7951-8421
; Strojarski fakultet, Sveučilište u Aksarayu, Aksaray, Turska
Suat Suat Altun
; Strojarski fakultet, Sveučilište u Karabuku, Karabuk, Turska
Sažetak
Heat treatment process, which is widely used in the wood industry, has shown some negative effects on the mechanical strength of wood. The objective of this study was to investigate the effects of catalysts on the modulus of rupture (MOR), mass loss and chemical structure of heat–treated Scotch pine (Pinus sylvestris L.) samples. For this purpose, some catalysts (50 % NaOH and 47 % KOH solutions, solid KOH) were added to the heat treatment process. Heat treatment experiments were performed under the nitrogen atmosphere at the temperature of 212 °C for 2 h. The MOR and chemical changes monitored by FT-IR spectra were then examined for the test groups. According to the results of this study, the use of commercial solid potassium hydroxide (KOH) in heat treatment decreased the degree of strength loss and mass loss of heat-treated wood. The strength (MOR) loss of samples heat-treated in the presence of potassium hydroxide was found to be only 5.4 %, while the strength loss in non-catalytic treatment was found to be 12.5 %.
Ključne riječi
heat treatment; Scotch pine; mechanical strength; catalyst; chemical properties
Hrčak ID:
206347
URI
Datum izdavanja:
4.10.2018.
Posjeta: 1.413 *