Physicochemical properties of Pinus massoniana wood subjected to silicone oil heat treatment

Okon, Kufre Edet; Udoakpan, Ubong Ime

doi:10.4067/s0718-221x2019005000409

Cited by 7 publications

(6 citation statements)

References 17 publications

(22 reference statements)

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“…After treatment, the hydrogen bonds between cellulose molecular chains recombined, resulting in a decrease in the number of free hydroxyl groups and a decrease in the hygroscopic properties of the bamboo scrimber. Non-polar oil molecules attached to the cell wall may further prevent the entry of water after treatment [ 21 ]. Hot oil treatment improves the dimensional stability of the products.…”

Section: Resultsmentioning

confidence: 99%

Effects of One-Step Hot Oil Treatment on the Physical, Mechanical, and Surface Properties of Bamboo Scrimber

Yuan

Wang

et al. 2020

Molecules

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Bamboo scrimber is a new type of bamboo-based panel that is prone to be affected by biological and service environments under outdoor conditions. In this paper, the physical and mechanical performance and the microchemical and surface properties of untreated and hot-oil-treated bamboo scrimber were analyzed to illustrate the processing mechanism of scrimber. Methyl silicone oil treatment was carried out at 120, 140, and 160 °C for 2, 4, and 6 h. The density, mechanical properties, air-dried moisture content, surface morphology, chemical structure, swelling properties, color, and contact angle of the bamboo scrimber were analyzed to evaluate the treatment effectiveness. Observation of the environmental-scanning electron microscope indicated that the glue layer of the bamboo scrimber was not significantly damaged after hot oil treatment. At low temperatures, the mechanical properties did not change significantly. Infrared-spectrum analysis showed a significant decrease in mechanical properties at higher temperatures and longer treatment time for the degradation of hemicellulose. The contact angle test and swelling properties test showed that the hot oil treatment improved the dimensional stability and reduced the wettability on the surface of the bamboo scrimber. The above analysis results show that the treatment at 140 °C for 2 h is most effective.

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Section: Resultsmentioning

confidence: 99%

Effects of One-Step Hot Oil Treatment on the Physical, Mechanical, and Surface Properties of Bamboo Scrimber

Yuan

Wang

et al. 2020

Molecules

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“…Increased content of heat-treated wood extractives has been reported in the literature by Esteves et al (2011, Esteves et al (2022), Lengowski et al (2021) and Lopes et al (2022). It was also observed in the heat treatment of wood particles (Crespo et al 2014), as well as in heat treated wood by different methods, as in the heat treatment with silicone oil studied by Okon and Udoakpan (2019).…”

Section: Resultsmentioning

confidence: 84%

Characterization of Acrocarpus fraxinifolius wood submitted to heat treatment

Oliveira

Aquino

et al. 2022

Maderas, Cienc. tecnol.

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Aiming to provide greater visibility for the wood species Acrocarpus fraxinifolius, the present study sought to analyze the influence of heat treatment on an industrial scale applied to wood species, also popularly known as Indian cedar. The heat treatment was carried out in an autoclave, with temperature and pressure control, and with saturated steam injection, for temperatures 155 ºC, 165 ºC, 175 ºC, and 185 ºC. Physical, chemical, and mechanical tests were carried out for the analyzed wood. The content of holocellulose and total lignin decreased, while the content of extractives showed a substantial increase. The density increased after the heat treatment, however the treated wood showed cracks, and these cracks influenced the significant loss of the values of the mechanical properties of compression, tension, and flexion. The shear showed strength gain for the temperature of 155 ºC, and the wood treated at 165 ºC was equivalent to untreated wood. The woods submitted to temperatures of 175 ºC and 185 ºC presented strength losses. The heat treatment in question contributes to increase the visibility, use and market value of wood.

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“…The bands at 3415 cm −1 correspond to hydroxyl groups present in the bamboo. Both HSO and HTO displayed a blunt and decreased peak of -OH in comparison with the untreated control, indicating that the two treatments enhanced the formation of hydrogen bond between hydroxyl groups [ 32 ]. The band at 2925 cm −1 assigned to CH 2 stretching was more pronounced in HTO and 0.8 CuN, which was contributed by the mineral oil and CuN containing alkanes and cycloalkanes.…”

Section: Resultsmentioning

confidence: 99%

Enhanced durability of round bamboo treated with copper naphthenate under heat-cold impregnation

et al. 2022

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Round bamboo has aroused much interest in construction for its mechanical properties, but poor biological durability seriously restricts its application. In order to develop a suitable and effective preservative treatment method for round bamboo, copper naphthenate (CuN) was adopted and impregnated into round bamboo using heat-cold procedure. The distribution and retention of copper naphthenate in round bamboo were studied, and the biological durability represented by the mould and decay resistance were investigated. The results showed that the retention and fixation of copper reached 0.39 kg⋅m −3 and 85.3%, respectively. Scanning electron microscopy–energy dispersive X-ray spectrometry further disclosed an increasing trend in the composition of CuN from the end inward. X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy analyses later revealed that CuN could be fixed on bamboo in the form of hydrogen bond or complex reaction. Statistical analysis showed that the increasing concentration of CuN from 0.3% to 0.5% and 0.8% (calculated as Cu 2+ content) has significant contribution against Trametes versicolor and Gloeophyllum trabeum in comparison with the untreated bamboo. Meanwhile, when the concentration of treating solution increased to 0.8 wt%, the resisting efficacy for Aspergillus niger , Penicillium citrinum and Trichoderma viride soared as high as 85.9%, 94.8% and 70.3%, respectively.

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Physicochemical properties of Pinus massoniana wood subjected to silicone oil heat treatment

Cited by 7 publications

References 17 publications

Effects of One-Step Hot Oil Treatment on the Physical, Mechanical, and Surface Properties of Bamboo Scrimber

Effects of One-Step Hot Oil Treatment on the Physical, Mechanical, and Surface Properties of Bamboo Scrimber

Characterization of Acrocarpus fraxinifolius wood submitted to heat treatment

Enhanced durability of round bamboo treated with copper naphthenate under heat-cold impregnation

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