Issue 13, 2011

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

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

Additions and corrections

Article information

Article type
Paper
Submitted
05 Mar 2011
Accepted
21 Apr 2011
First published
23 May 2011

Soft Matter, 2011,7, 6034-6040

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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