Structure and characterization of Chinese fir (Cunninghamia lanceolata) wood/MMT intercalation nanocomposite (WMNC) |
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Authors: | Wenhua Lü Guangjie Zhao |
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Institution: | (1) Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing, 100091, China;(2) College of Material Science and Technology, Beijing Forestry University, Beijing, 100083, China |
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Abstract: | With water-soluble phenol-formaldehyde resin as an intermediate, Chinese fir (Cunninghamia lanceolata) wood/montmorillonite nanocomposite (WMNC) was prepared through vacuum impregnation and characterized with XRD, SEM, FTIR
and TG-DTA analyses. The XRD analysis indicated that the wood crystallinity of WMNC decreased, the MMT exfoliated and some
nano silicate layers entered into the non-crystallized microfibrillar region of the wood cell wall. Wood structure is anisotropic
and its impregnation is anisotropic. Due to the nonuniformity of the MMT organic modification, PF intercalation and wood impregnation,
the MMT configuration and distribution in wood were diverse. The SEM graphs of WMNC showed that some silicate grains were
blocked in the wood cell lumen, some silicate layers adhered to the inner surface of the wood cell wall, and some exfoliated
MMT layers even penetrated the wood cell wall. The obtained hydroxyl of WMNC increased and its ether linking decreased. It
was considered that MMT and wood interacted not only with hydroxyl bonds, but also involved some chemical linking. Compared
with untreated wood and the PF-impreg, the pyrolysis process of WMNC changed; its starting decomposing temperature decreased
and its pyrolysis weight loss at high temperatures greatly decreased. The WMNC indicated certain nanoeffects of the composition
of the inorganic MMT nanolamellae.
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Translated from Journal of Beijing Forestry University, 2007, 29(1): 131–135 译自: 北京林业大学学报] |
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Keywords: | Chinese fir wood montmorillonite (MMT) water-soluble phenol-formaldehyde resin (PF) nano intercalation compounding structure and characterization |
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