Chemical reactivity of heat-treated wood

Inari, G. Nguila; Pétrissans, Mathieu; Gérardin, Philippe

doi:10.1007/s00226-006-0092-7

Cited by 96 publications

(17 citation statements)

References 24 publications

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“…An increment in lignin content of the sapwood from 20.8 % in the untreated wood to 24.7 % in the heat treated wood, while the lignin content of the heartwood from 22.4 % in the untreated heartwood to 25.0 % in the heat treated wood. Similar observations were also made by Brito et al (2008), Mburu et al (2008), Inari et al (2007), Yildiz et al (2006) and Sarni et al (1990). The changed in lignin composition showed that there was a changed in the lignin structure of wood.…”

Section: Ligninsupporting

confidence: 81%

“…The holocellulose contents ranged between 63.1 to 70.8 % for sapwood and 64.0 to 71.7 % for heartwood depending on the temperature and duration applied. Studies by Inari et al (2007) and Boonstra and Tjeerdsma (2005) also reported similar observations. The holocellulose content of beech and pine decreases between 50 % and 60 % after heat treatment (Inari et al, 2007).…”

Section: Holocellulosesupporting

confidence: 71%

“…Studies by Inari et al (2007) and Boonstra and Tjeerdsma (2005) also reported similar observations. The holocellulose content of beech and pine decreases between 50 % and 60 % after heat treatment (Inari et al, 2007). While Boonstra and Tjeerdsma (2005) found that holocellulose content of heat treated Scots pine decreased between 79.7 % and 63.3 %.…”

Section: Holocellulosesupporting

confidence: 71%

See 2 more Smart Citations

Changes in Strength and Chemical Contents of Oil Heat Treated 15-year-old Cultivated Acacia Hybrid

Wahab¹,

Khalid²,

Sudin³

et al. 2012

IJC

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Studies were conducted on the changes in strength and chemical contents of cultivated 15 year-old Acacia hybrid treated through oil heat treatment process. The timbers harvested and cut at the portions bottom, middle and top, were oil heat treated using palm oil for durations of 30, 60 and 90 min. at temperatures of 180, 200 and 220 . ℃ The untreated A. hybrid was used as control. The results of the studies showed that the oil heat treatment process causes some changes in the strength and chemical composition of the timbers. Strength reduction during the bending tests in both the MOR and MOE were noted throughout the treatment process. The chemical constituents of the treated timber also underwent changes in their contents. The holocellulose and cellulose degraded with the increasing of treatment temperature and duration in the oil heat treatment, while lignin showed

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Section: Ligninsupporting

confidence: 81%

Section: Holocellulosesupporting

confidence: 71%

Section: Holocellulosesupporting

confidence: 71%

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Changes in Strength and Chemical Contents of Oil Heat Treated 15-year-old Cultivated Acacia Hybrid

Wahab¹,

Khalid²,

Sudin³

et al. 2012

IJC

View full text Add to dashboard Cite

show abstract

“…This result indicated that the acidic properties of wood fibers increased after steam treatment. It was also observed that the color of the modified fibers became more intense [33]. During the treatment, the semi-cellulose with its comparatively poor heat resistance partially degrades, losing its acetyl group, resulting in the formation of acetic acid.…”

Section: Resultsmentioning

confidence: 99%

Optimization of High Temperature and Pressurized Steam Modified Wood Fibers for High-Density Polyethylene Matrix Composites Using the Orthogonal Design Method

Gao

Cheng

et al. 2016

Materials

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The orthogonal design method was used to determine the optimum conditions for modifying poplar fibers through a high temperature and pressurized steam treatment for the subsequent preparation of wood fiber/high-density polyethylene (HDPE) composites. The extreme difference, variance, and significance analyses were performed to reveal the effect of the modification parameters on the mechanical properties of the prepared composites, and they yielded consistent results. The main findings indicated that the modification temperature most strongly affected the mechanical properties of the prepared composites, followed by the steam pressure. A temperature of 170 °C, a steam pressure of 0.8 MPa, and a processing time of 20 min were determined as the optimum parameters for fiber modification. Compared to the composites prepared from untreated fibers, the tensile, flexural, and impact strength of the composites prepared from modified fibers increased by 20.17%, 18.5%, and 19.3%, respectively. The effect on the properties of the composites was also investigated by scanning electron microscopy and dynamic mechanical analysis. When the temperature, steam pressure, and processing time reached the highest values, the composites exhibited the best mechanical properties, which were also well in agreement with the results of the extreme difference, variance, and significance analyses. Moreover, the crystallinity and thermal stability of the fibers and the storage modulus of the prepared composites improved; however, the hollocellulose content and the pH of the wood fibers decreased.

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“…The wheat straw powder was dewaxed by refluxing with toluene-ethanol (2:1, v/v) in a Soxhlet apparatus for 6 h (Cao et al 2014). Holocellulose was obtained by delignification of wheat straw with 15 wt.% sodium chlorite in acetic acid solution (pH 4-4.2) at 75 °C for 2 h (Nguila et al 2007). The sediment was filtered through a glass-filter and washed with distilled water to pH 7.…”

Section: Determination Of Chemical Compositionsmentioning

confidence: 99%

Optimization of Pretreatment and Alkaline Cooking of Wheat Straw on its Pulpability Using Response Surface Methodology

Wang

Chen

et al. 2017

BioResources

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The dissolution rates of the chemical compositions of alcohol-benzene extractables (ABE), holocellulose, hemicellulose, and lignin in wheat straw (WS) under different pretreatment conditions were investigated. The individual and interactive effects of three independent parameters, namely, sodium hydroxide (NaOH) dosage (x1: 8 wt.% to 12 wt.%), sodium sulfide (Na2S) dosage (x2: 10 wt.% to 18 wt.%), and time to maximum temperature (x3: 100 min to 140 min) on screened yield, Kappa number, and brightness of wheat straw pulp (WSP) were analyzed via response surface methodology (RSM). The results suggested that the quadratic equations were in good agreement with the experimental figures in the present work. The relative errors of verification results were less than 5%, which indicated that the selected model for explaining the relationship between the variables and the responses was correct. In addition, the relationships between the screened yield, reject yield, brightness, and Kappa number were described and explained. Wheat straw pulpability was optimized in this study via RSM.

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Chemical reactivity of heat-treated wood

Cited by 96 publications

References 24 publications

Changes in Strength and Chemical Contents of Oil Heat Treated 15-year-old Cultivated Acacia Hybrid

Changes in Strength and Chemical Contents of Oil Heat Treated 15-year-old Cultivated Acacia Hybrid

Optimization of High Temperature and Pressurized Steam Modified Wood Fibers for High-Density Polyethylene Matrix Composites Using the Orthogonal Design Method

Optimization of Pretreatment and Alkaline Cooking of Wheat Straw on its Pulpability Using Response Surface Methodology

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