Thermal decomposition of hemicelluloses

Werner, K.G.; Pommer, Linda; Broström, Markus

doi:10.1016/j.jaap.2014.08.013

Cited by 346 publications

(201 citation statements)

References 21 publications

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“…When studying the thermal decomposition of hemicelluloses, Werner et al (2014) and Yang et al (2007) found that most of these five-carbon carbohydrates start to degrade between 200 and 250 °C, which agrees with the data presented in Fig. 5.…”

Section: Thermal Degradation Propertiessupporting

confidence: 87%

Comparison of Conventional and Lignin-Rich Microcrystalline Cellulose

Vanhatalo¹,

Maximova²,

Perander³

et al. 2016

BioResources

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a Three microcrystalline cellulose (MCC) samples were manufactured from bleached and unbleached softwood kraft pulp, and their properties were compared to those of the commercial MCC, Avicel PH-101. One of the produced samples retained a large portion of lignin (10.3%), while the two others retained only some. The physical, chemical, thermogravimetric, and molecular properties were analyzed. The presence of lignin caused a substantial effect on the thermogravimetric and chemical properties of the MCC, as well as on its surface characteristics. The lignin-containing sample degraded at lower temperatures, and its UV Raman spectra had a high intensity aromatic band (1600 cm -1 ) arising from the lignin. X-ray photoelectron spectroscopy confirmed a high surface lignin coverage (40%) in this specimen only. Particle size and BET surface area measurement results varied in some limits between MCCs, while the cellulose crystallinity index showed almost equal values between 0.82 and 0.84. This work introduces a new wood-based product, the lignincontaining MCC, comparable in properties to the wide-marketed Avicel.

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Section: Thermal Degradation Propertiessupporting

confidence: 87%

Comparison of Conventional and Lignin-Rich Microcrystalline Cellulose

Vanhatalo¹,

Maximova²,

Perander³

et al. 2016

BioResources

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“…Leroy et al (2006) observed an exothermal peak at 505 °C assigned to lignin degradation of four wood species from Mediterranean. In a recent study, Werner et al (2014) reported that hemicelluloses presented an endothermic peak at around 300-330 °C. The endothermic peaks related to hemicelluloses and the exothermic peaks associated with lignin degradation of the wood species studied occur at lower temperatures than those verified in the literature.…”

Section: Wood Thermal Propertiesmentioning

confidence: 99%

Thermal Degradation and Morphological Aspects of Four Wood Species Used in Lumber Industry

Poletto

2016

Rev. Árvore

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-The aim of this work was characterize four wood waste samples from lumber industry in order to obtain previous information about structure and properties of wood before use it as a biofuel or as reinforcement in composite formulations. The influence of wood components on the thermal degradation stability of different wood species has been investigated using thermogravimetry, differential scanning calorimetry and scanning electron microscopy. Four wood species, Eucalyptus grandis (EUG), Pinus elliottii (PIE), Dipteryx odorata (DIP) and Mezilaurus itauba (ITA), were used in this study. The results showed that higher extractives contents may form a thin film on the wood fiber surface which can accelerate the degradation process and reduce the wood thermal stability Keywords: Wood thermal stability; Wood chemical composition; Wood waste. DEGRADAÇÃO TÉRMICA E ASPECTOS MORFOLÓGICOS DE QUATRO ESPÉCIES DE MADEIRA PROVENIENTES DA INDÚSTRIA MADEIREIRARESUMO -O objetivo deste trabalho foi caracterizar quatro amostras de resíduos de madeira oriundas da indústria madeireira a fim de obter informações prévias sobre a estrutura e as propriedades da madeira antes do seu uso como biocombustível ou como reforço em compósitos. A influência dos componentes da madeira na estabilidade térmica de diferentes espécies de madeira foi investigada utilizando termogravimetria, calorimetria exploratória diferencial e microscopia eletrônica de varredura. Quatro espécies de madeira, Eucalyptus grandis (EUG), Pinus elliottii (PIE), Dipteryx odorata (DIP) e Mezilaurus itauba (ITA), foram utilizadas neste estudo. Os resultados mostraram que elevadas quantidades de extrativos podem formar uma fina película na superfície da fibra de madeira, o que pode acelerar o processo de degradação e reduzir a estabilidade térmica da madeira.Palavras-chave: Estabilidade térmica da madeira; Composição química da madeira; Resíduos de madeira.

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“…Hemicellulose is a linear and branched heteropolymer polysaccharide that consists of sugars like d-xylose, l-arabinose, d-glucose, d-galactose, d-mannose, d-glucuronic acid, d-galacturonic acid and 4-O-methyl-glucuronic acid, which are linked to each other by β-1,4 glycosidic bonds or rarely by β-1,3-glycosidic linkage (Perez et al 2002;Leschine 1995;Werner et al 2014;Giudicianni et al 2013). Hemicelluloses are found in primary as well as secondary walls of the plant and contribute one-third of the total dry weight of wood (Perez et al 2002;Jeffrie 1994).…”

Section: Hemicellulosementioning

confidence: 99%

“…Fiber industry (Averous and Pollet 2012;Werner et al 2014;Song et al 1998;Rameshwari and Meenakshisundaram 2014) Poly (3-hydroxybutyrateco-3-hydroxyhexanoate)…”

mentioning

confidence: 99%

Review on the current status of polymer degradation: a microbial approach

Pathak

Bithel

2017

Bioresour. Bioprocess.

600

241

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Inertness and the indiscriminate use of synthetic polymers leading to increased land and water pollution are of great concern. Plastic is the most useful synthetic polymer, employed in wide range of applications viz. the packaging industries, agriculture, household practices, etc. Unpredicted use of synthetic polymers is leading towards the accumulation of increased solid waste in the natural environment. This affects the natural system and creates various environmental hazards. Plastics are seen as an environmental threat because they are difficult to degrade. This review describes the occurrence and distribution of microbes that are involved in the degradation of both natural and synthetic polymers. Much interest is generated by the degradation of existing plastics using microorganisms. It seems that biological agents and their metabolic enzymes can be exploited as a potent tool for polymer degradation. Bacterial and fungal species are the most abundant biological agents found in nature and have distinct degradation abilities for natural and synthetic polymers.

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Thermal decomposition of hemicelluloses

Cited by 346 publications

References 21 publications

Comparison of Conventional and Lignin-Rich Microcrystalline Cellulose

Comparison of Conventional and Lignin-Rich Microcrystalline Cellulose

Thermal Degradation and Morphological Aspects of Four Wood Species Used in Lumber Industry

Review on the current status of polymer degradation: a microbial approach

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