Spectrochemical characterization by FT-Raman spectroscopy of wood heat-treated at low temperatures: Japanese larch and beech

Yamauchi, Shigeru; Iijima, Y.; S, Doi

doi:10.1007/s10086-004-0691-6

Cited by 34 publications

(19 citation statements)

References 15 publications

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“…Although, for a highly disordered carbonaceous material, the G band is generally assigned to the aromatic symmetric stretching [23,27,47], and the D band (around 1350 cm -1 ) to aromatics with not less than six rings [23,47] or to C-C vibration of aromatic ring [27].In the case of amorphous carbon the D band was also attributed to benzene or condensed benzene amorphous rings [47] or to the disordered or distorted structure [25].…”

Section: Raman Analysismentioning

confidence: 96%

Characterization of Miscanthus pyrolysis by DRIFTs, UV Raman spectroscopy and mass spectrometry

Elmay

Brech

Delmotte

et al. 2015

Journal of Analytical and Applied Pyrolysis

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Section: Raman Analysismentioning

confidence: 96%

Characterization of Miscanthus pyrolysis by DRIFTs, UV Raman spectroscopy and mass spectrometry

Elmay

Brech

Delmotte

et al. 2015

Journal of Analytical and Applied Pyrolysis

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“…In one study that used FT-Raman to look at the pyrolyzed Japanese cedar [71] in a nitro gen atmosphere at various temperatures (200-1000 • C), observation of two characteristic bands at 1340 and 1590 cm −1 was reported and the spectral features were found to change markedly as a function of temperature. A second study [72] involved Raman investigations of Japanese larch heartwood and Japanese beech sapwood where the wood samples were heated for 22 h at constant temperatures in the temperature range of 50-180 • C. The spec tral changes, mainly detected in the C==C and C==O regions, were interpreted in terms of condensation reactions of lignin during heat treatment. At higher temperatures, spectral changes in the region 1200-1500 cm −1 suggested that the wood constituents were partly decomposed.…”

Section: Heat Treatedmentioning

confidence: 99%

Raman Spectroscopic Characterization of Wood and Pulp Fibers

Agarwal

2008

Characterization of Lignocellulosic Materials

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This chapter reviews applications of Raman spectroscopy in the field of wood and pulp fibers. Most of the literature examined was published between 1998 and 2006. In addi tion to introduction, this chapter contains sections on wood and components, mechanical pulp, chemical pulp, modified/treated wood, cellulose I crystallinity of wood fibers, and the "self-absorption" phenomenon in near-infrared (IR) Fourier-transform (FT)-Raman spectroscopy. When needed, the sections are further categorized into various subsections. For example, the section on wood and components contains a variety of topics ranging from Raman band assignments to molecular changes during tensile deformation. From this review it will become clear that Raman spectroscopy has become an essential analytical technique in the field of wood and pulp fibers. IntroductionTechniques that can provide information on the chemical constitution of wood and pulp fibers and on processing-related changes of these materials are of great interest. Raman spectroscopy [1] is one such technique that provides fundamental knowledge on a molecu lar level and does not require chemical treatment of the sample (contrary to the case, for example, in fluorescence and electron microscopy). It has become an important analyt ical technique for nondestructive, qualitative, and quantitative analysis of materials. The technique is useful in a number of areas, including analytical measurements, mechan istic studies, and structural determinations. Studying a sample is very simple and usually involves sampling an area of interest by directing a laser excitation beam and analyzing the collected molecularly specific scattered light [2]. Although initially, obtaining good-quality Raman data required operator skill and training, this has started to change as a result of the commercial availability of compact, easy-to-use, integrated instruments at reasonable cost.Nevertheless, although the specificity of Raman spectroscopy is very high, its sensitivity is somewhat poor. Considering that only a small number of the incident laser photons are inelastically scattered, the detection of analytes present in very low concentrations is limited. To overcome this problem, special Raman signal-enhancing techniques can be applied. The two most prominent approaches are the resonance Raman effect [3] and the

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“…The heat treatment also promoted the optical absorption and color formation behaviors of the wood (Yamauchi et al 2005;Windeisen and Wegener 2008;Yao et al 2012). During the heat treatment process, the degradation of hemicelluloses released organic acids, which facilitated polysaccharide degradation (Sivonen et al 2002).…”

Section: Surface Propertiesmentioning

confidence: 99%

Effects of Temperature and Duration of Heat Treatment on the Physical, Surface, and Mechanical Properties of Japanese Cedar Wood

Yang¹,

Chang²,

Lin³

et al. 2016

BioResources

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This study investigated the application of heat to wood samples from Japanese cedar trees (Cryptomeria japonica) of small and medium diameters to evaluate the effects of both the temperature and duration of treatment on its surface, physical, and mechanical properties. The results indicate that the density, moisture content, and hygroscopicity of the wood samples decreased as the treatment temperature and duration increased, and the mass loss increased under the same conditions. Additionally, the dimensional stability of the wood improved in response to increased temperatures and prolonged durations. These results suggest that heat treatment can be used to improve the dimensional stability of wood. The surface color of the wood darkened progressively with increasing treatment temperature and duration, and the hydrophobicity of the wood sample improved as a result of the heat treatment. In contrast to the untreated wood, the heat-treated wood exhibited decreased mechanical properties with an increase in the treatment temperature and duration.

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Spectrochemical characterization by FT-Raman spectroscopy of wood heat-treated at low temperatures: Japanese larch and beech

Cited by 34 publications

References 15 publications

Characterization of Miscanthus pyrolysis by DRIFTs, UV Raman spectroscopy and mass spectrometry

Characterization of Miscanthus pyrolysis by DRIFTs, UV Raman spectroscopy and mass spectrometry

Raman Spectroscopic Characterization of Wood and Pulp Fibers

Effects of Temperature and Duration of Heat Treatment on the Physical, Surface, and Mechanical Properties of Japanese Cedar Wood

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