Caracterização da superfície da fibra alimentar de laranja usando adsorção de nitrogênio.

Abstract

Relevant physical characteristics of these powders are the superficial area, size and pore distribution. These characteristics were studied for the albedo dietary fiber extracted from oranges. They were dehydrated by freezer-dryer and fixed bed dryer separated in three particle size intervals. The surface characteristics of the particles were investigated using nitrogen adsorption at low temperature. The specific superficial area, volume and medium diameter of mesopore were obtained using the BET method; the accumulative superficial area, volume, medium diameter and distribution of pores, using the BJH method. Different drying methods and particle size promoted significant differences in the physical properties of the fiber.