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Issue 13, 2011
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The morphology and mechanical properties of layer structured cellulose microfibril foams from ice-templating methods

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Abstract

Ice-templated (IT) cellulose microfibril porous foams with unique layer structure and controllable channels were successfully fabricated via unidirectional freezing methods. The cellulose microfibril foam prepared from 1.0 wt% suspension shows a cross-linked network structure. Increasing the content of the cellulose microfibril in the suspension up to 2.75 wt% led to a gradual transition from a crosslinked network structure to a lamellar channel structure. Increasing the concentration of microfibrils in the suspension up to 8.0 wt% caused an increase of the thickness of wall and bridge degree. The wavelength of IT channel structures could be controlled from 2.8 μm to 11.2 μm by changing the temperature gradient between the ice front and the cellulose microfibril suspension. The compressive stress of IT cellulose microfibril foams increases linearly from 30.7 KPa to 360.2 KPa with increasing concentrations of cellulose microfibril suspension from 2.0 wt% up to 8.0 wt%.

Graphical abstract: The morphology and mechanical properties of layer structured cellulose microfibril foams from ice-templating methods

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Publication details

The article was received on 05 Mar 2011, accepted on 21 Apr 2011 and first published on 23 May 2011


Article type: Paper
DOI: 10.1039/C1SM05388D
Soft Matter, 2011,7, 6034-6040

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    The morphology and mechanical properties of layer structured cellulose microfibril foams from ice-templating methods

    J. Lee and Y. Deng, Soft Matter, 2011, 7, 6034
    DOI: 10.1039/C1SM05388D

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