FTIR Studies of the Changes in Wood Chemistry from Wood Forming Tissue under Inclined Treatment

Shi, Jiangtao; Dong, Xiaoli; Lia, Jian

doi:10.1016/j.egypro.2012.01.122

Cited by 125 publications

(77 citation statements)

References 14 publications

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“…The absorption intensity of both untreated and heat-treated specimens obviously decreased at 3336 cm -1 (OH-stretching and intra-molecular hydrogen bonds of alcohols, phenols, and acids), as well as at 2900 cm -1 (C-H bonds in cellulose) after 3000 h of artificial weathering (Gelbrich et al 2012;Shi et al 2012). The decrease in band intensity at 1738 cm -1 (C=O of esters, ketones, aldehydes, and acids) was because of deacetylation and degradation of the hemicelluloses (Huang et al 2013).…”

Section: Chemical Analysis With Ftir Spectroscopymentioning

confidence: 99%

Effect of Artificial Weathering on the Properties of Industrial-Scale Thermally Modified Wood

Dong¹,

Wang²,

Li³

2015

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Thermally modified wood is widely used in cladding, decking, and other construction projects that are meant for outdoor exposure. The purpose of this study was to investigate changes in the color, microstructure, and chemical composition of heat-treated, Larix spp. wood that was exposed to artificial weathering. In this study, accelerated weathering tests (UV and moisture) were conducted over a period of 3000 h. Photodegradation of both heat-treated and untreated wood was evaluated in terms of color, microstructure, and chemical changes that were characterized using scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. Ultra-violet radiation caused the degradation of lignin and extractives of wood, resulting in an immediate color change of the wood. The SEM observation of the heat-treated wood showed deformations and cracks in both treated and untreated samples. Irradiation resulted in a pronounced reduction in the absorption intensity and broadening of the FTIR spectra. It was found that the industrial heattreatment of wood products resulted in more color stability than untreated wood during the early stages of weathering. Thermal modification was found, however, was ineffective in improving the UV resistance wood over long-term photodegradation conditions.

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Section: Chemical Analysis With Ftir Spectroscopymentioning

confidence: 99%

Effect of Artificial Weathering on the Properties of Industrial-Scale Thermally Modified Wood

Dong¹,

Wang²,

Li³

2015

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“…The peaks in the fingerprint region are assigned in Table 2. (Colom et al 2003;Huang et al 2012Huang et al , 2013 1615-1600 C=O C=O stretching conjugated to the aromatic ring (Zhao et al 2014) 1510 C=C Aromatic (lignin), stronger guaiacyl element than syringyl (Colom et al 2003;Guo and Bustin 1998;Huang et al 2012Huang et al , 2013Mahajan et al 2012;Pandey and Pitman 2003;Shi et al 2012;Zhao et al 2014) 1457 C-H Asymmetric bending in CH3 of lignin (Colom et al 2003;Huang et al 2012;Shi et al 2012;Xu et al 2013) 1370…”

Section: Ftirmentioning

confidence: 99%

“…Glucose ring stretching vibration (Bui et al 2015) 1030-1050 C-O (C-H) Primary ethanol, guaiacyl (lignin) (Huang et al 2012) 988 C-O (C-C, CH2) C-O and C-C stretching and CH2 rocking attributed to cellulose and lignin (Mahajan et al 2012) 896 C-O-C C-O-C vibrations at β-glucosidic linkages in hemicellulose and cellulose (Ghasemi et al 2013;Huang et al 2012;Pandey 1999;Shi et al 2012;Yuan et al 2015) The relative intensity of bands at 1734, 1615 to 1600, 1510, 1457, 1370, 1328, 1232 to 1239, 1160, 1115, 1030 to 1050, and 896 cm -1 showed no significant difference between the samples with and without heat treatment. The relative intensity of bands at 1270 cm -1 , assigned to guaiacyl ring breathing with C-O stretching, was slightly lower in heat-treated samples, which indicates the untreated samples contained much more methoxyl groups in their lignin (Colom et al 2003;Pandey and Pitman 2003;Huang et al 2012bHuang et al , 2013bMahajan et al 2012;Shi et al 2012;Zhao et al 2014).…”

Section: C-o (O-h)mentioning

confidence: 99%

Effects of Heat Treatment on Durability of Merbau Heartwood

Liao

Jian-jing

et al. 2015

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Merbau wood has been widely used in outdoor applications. However, it has a disadvantage in that its water-soluble extractives readily leach out and stain adjacent materials. Heat treatment is an efficient technique to solve this problem. In this study, the effects of heat treatment on the durability of merbau heartwood were investigated. Merbau heartwood blocks with and without heat treatment were exposed to subterranean termites (Coptotermes formosanus) according to ASTM D3345 (2008), and to brown-rot fungus (Gloeophyllum trabeum) and whiterot fungus (Trametes versicolor) according to ASTM D1413 (2007). The effect of heat treatment on the chemical changes in merbau heartwood and its extracts were investigated by means of Fourier transform infrared spectroscopy (FTIR) and gas chromatography -mass spectrometer (GC/MS). The results show that the extraction yields of merbau heartwood with heat treatment using various solvents significantly decreased. However, termite resistance and fungal resistance of merbau heartwood with and without heat treatment showed no obvious difference. FTIR spectra in the fingerprint region of merbau heartwood and its ethanol-benzene extracts did not show any significant difference between heat-treated and untreated samples. More constituents were identified from the ethanol-benzene extracts of merbau heartwood with heat treatment by means of GC/MS compared to those identified from the ethanol-benzene extracts of untreated merbau heartwood.

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“…FTIR plays an important role in wood sciences because of the simple sample preparation, the small sample size required for analysis, and the detailed structural information provided. FTIR spectra and the band assignment of wood samples have been extensively studied (Li et al 2011;Rana et al 2010;Shi et al 2012). Indeed, Popescu et al (2010) applied FTIR to investigate changes in the structure of lime wood (Tilia cordata Mill.)…”

Section: Introductionmentioning

confidence: 99%

Degradation Mechanism and Chemical Component Changes in Betula platyphylla Wood by Wood-Rot Fungi

Shang¹,

Shaopeng²,

Wang³

2013

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FTIR Studies of the Changes in Wood Chemistry from Wood Forming Tissue under Inclined Treatment

Cited by 125 publications

References 14 publications

Effect of Artificial Weathering on the Properties of Industrial-Scale Thermally Modified Wood

Effect of Artificial Weathering on the Properties of Industrial-Scale Thermally Modified Wood

Effects of Heat Treatment on Durability of Merbau Heartwood

Degradation Mechanism and Chemical Component Changes in Betula platyphylla Wood by Wood-Rot Fungi

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