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Structure and rheology of nanocrystalline cellulose

Structure and rheology of nanocrystalline cellulose,10.1016/j.carbpol.2010.11.039,Carbohydrate Polymers,Dagang Liu,Xiaoyu Chen,Yiying Yue,Mindong Chen

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Structure and rheology of nanocrystalline cellulose   (Citations: 2)
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Sulfate hydrolysis and high-pressure homogenization were combined to reduce the size of microcrystalline cellulose to the nanoscale. The obtained needle-shaped nanocrystals showed a relative uniform size with length of 90±50nm and width of 10±4nm. Rheology and phase transition of the nanocrystal colloids were studied. The flowability and modulus of the colloids showed a strong relationship with frequency, temperature, and concentration of the nanocrystals. Nanocrystals self-assembled into a liquid crystal phase in colloids and even in the dried film. Structure and morphology of the ordered liquid crystalline phase were characterized by scanning electron microscope and polarized optical microscope. It was found that cellulose nanocrystals were self-aligned layer by layer, which was responsible for the color of the dried film and also allowed an ordered layered microporous foam from the freeze-dried nanocrystalline colloids.
Journal: Carbohydrate Polymers - CARBOHYD POLYM , vol. 84, no. 1, pp. 316-322, 2011
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    • ...Because of this, cellulose derivative have been widely used as reinforcing agents in bio and nano composites (Liu et al. 2011; Siqueira et al. 2010), electro-optical displays materials (Godinho et al. 1998; Almeida et al. 2002; Costa et al. 2007), local strain sensor (Almeida et al. 2009) and biocarrier...

    C. Sena, et al. Liquid crystalline cellulosic elastomers: free standing anisotropic fi...

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