Sulfonated cellulose and method of preparation

Details Sulfonated cellulose and method of preparation Sulfonated cellulose and method of preparation

C - Chemistry, Metallurgy

08

B

C08B 15/00 (2006.01) D21C 9/00 (2006.01) D21H 11/14 (2006.01) D21H 11/20 (2006.01)

Patent

CA 2138193

Disclosed is a method for the surface modification of cellulose fiber and the resulting product, sulfonated cellulose. Cellulose is first oxidized, preferably with sodium metaperiodate (NaIO4), to form dialdehyde oxycellulose, which is then reacted with sodium bisulfite (NaHSO3) to produce sulfonated cellulose. Sulfonation of the cellulose fiber significantly increases the dry and wet tensile strength as well as the wet strength:dry strength ratio, making this modified cellulose fiber extremely useful in a wide variety of paper products requiring a combination of good strength in both wet and dry applications.

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