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    Author(s): Yan Wu; Siqun Wang; Dingguo Zhou; Cheng Xing; Yang Zhang; Zhiyong Cai
    Date: 2010
    Source: Bioresource technology. Vol. 101, no. 8 (Apr. 2010): p. 2867–2871.
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (249.69 KB)

    Description

    Agricultural biomaterials such as crop stalks are natural sources of cellulosic fiber and have great potential as reinforced materials in bio-composites. In order to evaluate their potential as materials for reinforcement, the nano-mechanical properties of crop-stalk cell walls, i.e. those of cotton (Gossypium herbaceu) stalk, soybean (Glycine max) stalk, cassava (Manihot esculent) stalk, rice (Oryza sativa L.) straw, and wheat (Triticum aestivum L.) straw, were investigated by means of nano-indentation and atomic force microscopy (AFM). The elastic modulus of wheat straw was found to be 20.8 GPa, which was higher than that of the other four crops. The highest hardness was observed in cotton stalk at 0.85 GPa. The elastic moduli of the crop stalks were lower than those of most of the hardwood species, but higher than that of some softwoods and of lyocell fiber. The mean value of the hardness of the five crop stalks' cell walls was higher than those of wood or lyocell fiber.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Wu, Yan; Wang, Siqun; Zhou, Dingguo; Xing, Cheng; Zhang, Yang; Cai, Zhiyong. 2010. Evaluation of elastic modulus and hardness of crop stalks cell walls by nano-indentation. Bioresource technology. Vol. 101, no. 8 (Apr. 2010): p. 2867–2871.

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    Keywords

    Elasticity, fibers, utilization, crop residues, biomass utilization, natural resources, fibrous composites, plant fibers, wheat straw, cotton stalks, cellulose, cellulose fibers, mechanical properties, nanotechnology, modulus of elasticity, hardness, plant cell walls, biocomposites, renewable natural resources, atomic force microscopy, nanoindentation, rice straw, soybean stalks, cassava stalks, crop stalks, nano-indentation

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https://www.fs.usda.gov/treesearch/pubs/37751