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Cellulose acquirement evaluation methods with different degrees of crystallinity

Abstract:

Cellulose is a biopolymer widely studied for being renewable, inexhaustible and because its chemical/ physical properties are suitable for various purposes. The trend is the application of this material in different products in science and technology and others. The objective of this study was to investigate the crystalline structure of cellulose from Eucalyptus spp kraft pulp bleached industrially, obtained from chemical and mechanical methods of modification, using the technique of X-ray diffraction. Through controlled acid hydrolysis samples were obtained with a high (90%) crystallinity index (CI) and there was cellulose II formation in treatments with acid concentration of 64% V/V. The alkali treatment also led to the formation of cellulose II. The microprocessor resulted in a decrease in the CI with a lower speed (1000 rpm) and greater number of passes (50) in the mill. By grinding in a ball mill, there was a decrease in the CI up to the formation of amorphous samples.