Journal
CARBOHYDRATE POLYMERS
Volume 117, Issue -, Pages 950-956Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2014.10.024
Keywords
Cellulose nanofibers; Bundles; Transmission electron microscopy; Structures
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Funding
- Fundamental Research Funds for the Central Universities [DL13BBX05]
- Postdoctoral Science-Research Developmental Foundation of Heilongjiang Province of China [LBH-Q12162]
- National Natural Science Foundation of China [31270590]
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To reveal the structures of cellulose naonfiber bundles extracted from lignocellulosic pulps and prepared by mechanical nanofibrillation methods, the samples were systematically investigated by transmission electron microscopy (TEM) observation. First, high magnification and high resolution TEM images were obtained starting from one end of the bundles. The imaging position was then carefully shifted along the length of the bundles until the other end was reached. Finally, a series of TEM images were integrated through image processing and analyzed. The cellulose nanofiber bundles displayed ribbon-like structures, which were organized with parallel aligned cellulose nanofibers 2-5 nm in width. The length of the bundles was >11 mu m. The bundles were interconnected with other nanofibers and nanofiber bundles, forming entangled, web-like networks in suspension. Evidence demonstrating the existence of twisted bundle morphologies was also presented. (C) 2014 Elsevier Ltd. All rights reserved.
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