Ultra-lightweight, open-pore foamed cellulose materials with...

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134/39, 195/40

B01J 41/16 (2006.01) B01J 39/22 (2006.01) C12N 5/00 (2006.01) C12N 11/12 (2006.01)

Patent

CA 2039843

An ultra-lightweight, open-pore foamed cellulose material with an increased surface area having ion exchangeable functional groups introduced in it. The cellulose material presents a three-dimensional network structure which, upon swollen, has a pore diameter of 0.5 to 12.0 mm, a mean pore diameter of 0.1 to 1.7 mm, a specific surface area of 1.0 to 10.0 m2/g, a true density of 1.4 to 1.6 g/cm3 and a porosity of 90 % or greater. The ion exchangeable functional groups, for instance, may be cationic polyethyleneimine.

Divulgation d'une matière cellulosique mousse, à pores ouverts, ultra-légère, de surface efficace accrue, dans laquelle ont été introduits des groupements fonctionnels échangeurs d'ions. Cette matière cellulosique présente une structure en réseau tridimensionnel qui, après expansion, a des pores de diamètre allant de 0,5 à 12,0 mm et de diamètre moyen allant de 0,1 à 1,7 mm, une surface efficace spécifique allant de 1,0 à 10,0 m2/g, une densité réelle allant de 1,4 à 1,6 g/cm3 et une porosité supérieure ou égale à 90 %. Les groupements fonctionnels échangeurs d'ions peuvent être, par exemple, des polyéthylène-imines cationiques.

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