Extraction, Addition and Characterization of Hemicelluloses from Corn Cobs to Development of Paper Properties

The corncob is a product found in significant amounts in the residues of agriculture, which has potential for use underexplored. This paper presents a study of the chemical characterization of corn cobs, extraction and application of hemicelluloses present in these wastes. Two fractions of hemicelluloses were obtained, the first being obtained after neutralization and precipitation of the alkaline solution and the second after addition of ethanol in the supernatant of the same solution. Handsheets were made by using bleached kraft eucalyptus pulp, and adding hemicelluloses. After that, their physical and mechanical properties were evaluated, according to TAPPI Standard. An increase in the resistance was observed to drainage and in the properties directly affected by the inter-fiber bonds with the content increase of hemicelluloses and also obtaining handsheets with lower bulk with content increase of these carbohydrates.