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Wood Science and Technology

Erschienen in:

27.09.2017 | Original

Thermogravimetric analysis of cork and cork components from Quercus variabilis

verfasst von: Weiwei Shangguan, Zhangjing Chen, Jingfeng Zhao, Xiaozhou Song

Erschienen in: Wood Science and Technology | Ausgabe 1/2018

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Abstract

Cork and cork components (suberin, lignin, holocellulose, sclereids, and lenticels) were obtained by manual and chemical methods. Dynamic thermogravimetric analysis was used to investigate the thermal behavior of cork and its components. Thermal decomposition of cork was different from that of natural fibers. Characteristic temperatures of thermal decomposition for cork and impurities (sclereids and lenticels) were related to their chemical components. Cork lignin has the decomposition characteristics of G-type (guaiacyl units) lignin, typical of softwood with high residual solids. The pyrolysis characteristics of Quercus variabilis Blume (Q. variabilis) suberin was close to Quercus cerris L. (Q. cerris) suberin. The decomposition temperature range of cork, lignin, or suberin was wider than that of sclereids, lenticels, or holocellulose. Activation energy of cork was lower than that of natural fibers. The activation energy of cork and the extracted suberin was slightly increased when the conversion rate α was greater than 0.35. Activation energies of sclereids and lenticels were close to each other due to similar composition and proportion in them.

Vorheriger Artikel The anisotropic temperature rise on wood surfaces during adsorption measured by thermal imaging

Nächster Artikel Surface engineering of wood substrates to impart barrier properties: a photochemical approach

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Titel: Thermogravimetric analysis of cork and cork components from Quercus variabilis
verfasst von: Weiwei Shangguan
Zhangjing Chen
Jingfeng Zhao
Xiaozhou Song
Publikationsdatum: 27.09.2017
Verlag: Springer Berlin Heidelberg
Erschienen in: Wood Science and Technology / Ausgabe 1/2018
Print ISSN: 0043-7719
Elektronische ISSN: 1432-5225
DOI: https://doi.org/10.1007/s00226-017-0959-9

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