scholarly journals Vacuum-heat treatment of Scots pine (Pinus sylvestris L.) wood pretreated with propanetriol

2020 ◽  
pp. 1-9
Author(s):  
Hüseyin Sivrikaya ◽  
Reza Hosseinpourpia ◽  
Sheikh Ali Ahmed ◽  
Stergios Adamopoulos
Keyword(s):  
Heat Treatment ◽  
Pinus Sylvestris ◽  
Scots Pine ◽  
Vacuum Heat Treatment

scholarly journals Effects of heat treatment systems on the physical properties of coated Scots pine (Pinus sylvestris L.) and poplar (Populus euramericana)

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 2708-2720 ◽  
Author(s):  
Ahmet Can
Keyword(s):  
Heat Treatment ◽  
Pinus Sylvestris ◽  
Physical Properties ◽  
Mass Loss ◽  
Scots Pine ◽  
Wood Species ◽  
Color Change ◽  
Vacuum Heat Treatment ◽  
Populus Euramericana ◽  
Water Based

Heat treatment is an environmentally friendly and efficient way to improve the properties of wood species. These treatments alter the substrates and can influence the surface properties of the varnish coatings. This paper investigated the effects of heat treatment on the physical properties of open and close systems Scots pine (Pinus sylvestris L.) and poplar (Populus euramericana) wood, coated with water-based, polyurethane-based, and oil/wax-based varnishes. Heat treatment was applied at the temperatures of 190, 212 °C for pine and 180, 200 °C for poplar, respectively. Color, gloss, and roughness tests were carried out for each of the coatings. Higher mass loss occurred in pine samples with heat treatment as compared to vacuum-heat treatment. Gloss decreased in OIL+WAX treatment and color change increased after the heat treatment, but these results were inhibited with vacuum-heat treatment. Maximum roughness was obtained in PUR varnishes and minimum roughness in OIL + WAX samples. The low roughness values provide some advantages in application.

scholarly journals Effects of heat treatment on some characteristics of Scots pine (Pinus sylvestris L.) wood

BioResources ◽  
2019 ◽  
Vol 14 (4) ◽  
pp. 9531-9543
Author(s):  
Ekrem Durmaz ◽  
Tutku Ucuncu ◽  
Mehmet Karamanoglu ◽  
Alperen Kaymakci
Keyword(s):  
Heat Treatment ◽  
Pinus Sylvestris ◽  
Scots Pine ◽  
Bending Strength ◽  
Treated Wood ◽  
Crystallinity Index ◽  
Wood Material ◽  
Chemical Surface ◽  
Treatment Processes ◽  
Heat Treated

Heat treatment of wood materials is generally performed to improve the physical, mechanical, chemical, surface, thermal, and crystallinity characteristics. In this way, the usage areas of wood material in different purposes can be expanded by means of heat treatment. The goal of this study was to determine the physical, mechanical, chemical, crystallinity, and surface properties of heat-treated Scots pine (Pinus sylvestris L.) wood. The test samples were heat-treated at 120 °C, 150 °C, 180 °C, and 210 °C for 4 and 6 h in a laboratory-scale oven. The shrinking and swelling chracteristics of wood was decreased as a function of heat treatment processes. Bending strength, compression strength, and modulus of elasticity decreased. In addition, lignin ratios and crystallinity index increased as temperature and duration of the treatment were increased. Consequently, heat-treated wood materials can be used in various areas by developing some of their properties.

Pore analysis of thermally compressed Scots pine (Pinus sylvestris L.) by mercury intrusion porosimetry

Holzforschung ◽  
2017 ◽  
Vol 72 (1) ◽  
pp. 57-63 ◽  
Author(s):  
Lili Li ◽  
Ximing Wang ◽  
Yan Yan ◽  
Lijuan Ping
Keyword(s):  
Heat Treatment ◽  
Pinus Sylvestris ◽  
Scots Pine ◽  
Exposure Time ◽  
Mercury Intrusion Porosimetry ◽  
Pore Distribution ◽  
Mercury Intrusion ◽  
Pore Analysis ◽  
Pore Structures

AbstractIn focus of the present study was the mercury intrusion porosimetry (MIP) of heartwood (hW) and sapwood (sW) of Scots pine, which were modified by compression alone (C) and combination of C and heat treatment (CHT). The untreated sW has a more uniform pore distribution than that of hW as presented in logarithmic differential curves. Expectedly, the total pore volumes of CHThW and CHTsW are significantly decreased. Compared to the HT temperature (180–220°C), the exposure time (2–5 h) has a weaker effect on the pore structures of the CHT woods. Furthermore, the intrusion volume of CHThW decreased compared with compressed alone samples. However, an inverse result was apparent for CHTsW.

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