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Structure and morphology of cellulose in wheat straw

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Abstract

The structure and morphology of cellulose extracted from wheat were studied. It was found that the extraction process is effective and hemicelluloses and lignin can be extracted completely. Cellulose in wheat straw was identified as cellulose I allomorph with low crystallinity and the crystallinity of cellulose from different parts of the wheat straw has little difference. There was no metastable cellulose Iα crystalline modification found in wheat straw; only the more stable cellulose Iβ crystalline modification existed. Cellulose chains in the epidermis of wheat straw were observed with their orientation along the growth direction of wheat straw, while those in parenchyma were observed with almost no preferred orientation. There are two kinds of morphologies on the surface of wheat straw. One is the fiber structure with fibrils of about 5 μm diameter, and the other is the fiber structure with serration morphology at the edge of the fiber, with which the fibers are connected together. The diameter of the latter one is about 10 μm. The vascular bundles consist of circular rings while spiral structure cellulose backbones covered with thin cellulose film were also observed.

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Authors and Affiliations

  1. State Key Laboratory of Polymer Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100080, China

    Ruigang Liu, Hui Yu & Yong Huang

  2. Laboratory of Cellulose and Lignocellulosics Chemistry, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, 510650, China

    Yong Huang

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  1. Ruigang Liu
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  2. Hui Yu
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Liu, R., Yu, H. & Huang, Y. Structure and morphology of cellulose in wheat straw. Cellulose 12, 25–34 (2005). https://doi.org/10.1023/B:CELL.0000049346.28276.95

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  • DOI: https://doi.org/10.1023/B:CELL.0000049346.28276.95

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