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Journal of Wood Science

Official Journal of the Japan Wood Research Society

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Lignin as a cross-linker of acrylic acid-grafted carboxymethyl lignocellulose

Journal of Wood Science volume 56, pages 470–476 (2010)Cite this article

Abstract

Cunninghamia lanceolata wood meal samples with different lignin contents after delignification with an acidic NaClO2 system were carboxymethylated, and the degree of substitution (DS) and the distribution of the carboxymethyl (CM) groups were investigated by proton nuclear magnetic resonance (1H NMR) spectroscopy. Cellulose samples prepared from bleached kraft softwood pulp, food-grade konjac mannan, and commercial oat xylan (containing 10% arabinosyl and 15% glucosyl residues) were also investigated. The chemical shift of methylene protons in 1H NMR spectra of CM groups of carboxymethyl konjac mannan and commercial oat xylan appeared in the same region as those of carboxymethylcellulose. The DS of carboxymethyl lignocellulose (CMLC) increased slightly from 1.36 to 1.48 with decreasing lignin content, but the water solubility of CMLC clearly increased with decreasing lignin content. It was suggested that the covalent linkages between lignin and cell-wall polysaccharides play the role of cross-linker in CMLC. Water absorbents were synthesized by graft-copolymerization of acrylic acid onto CMLC samples with different lignin contents. The highest level of water absorbency was obtained from CMLC containing 14% of lignin, suggesting the importance of lignin as the cross-linker.

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Authors and Affiliations

  1. School of Engineering, Zhejiang Forestry University, 88 North Huancheng Road, Linan, Zhejiang, 311300, China

    Zhenfu Jin, Youming Yu, Jiewang Ye & Lin Lin

  2. Institute of Ecology, Zhejiang Forestry Academy, Hangzhou, Zhejiang, 310023, China

    Shunliu Shao

  3. Japan International Research Center for Agricultural Science (JIRCAS), Tsukuba, 305-8686, Japan

    Kenji Iiyama

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  1. Zhenfu Jin
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  2. Youming Yu
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  6. Kenji Iiyama
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Correspondence to Zhenfu Jin.

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Jin, Z., Yu, Y., Shao, S. et al. Lignin as a cross-linker of acrylic acid-grafted carboxymethyl lignocellulose. J Wood Sci 56, 470–476 (2010). https://doi.org/10.1007/s10086-010-1128-z

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  • DOI: https://doi.org/10.1007/s10086-010-1128-z

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