Preparation and characterization of a cellulose/NbOPO4.nH2O hybrid from bleached sugarcane bagasse

Author(s)

Paulo H. F. Pereira ^[1] ; Herman C. J. Voorwald ^[2] ; Maria O. H. Cioffi ^[3] ; Maria L. C. P. da S. Pereira ^[4]

Affiliation

^[1] UNESP. Departamento de Materiais e Tecnologia

^[2] UNESP. Departamento de Materiais e Tecnologia

^[3] UNESP. Departamento de Materiais e Tecnologia

^[4] USP. Departamento de Engenharia Química

• Document type: Journal article
• Source: POLIMEROS-CIENCIA E TECNOLOGIA; v. 22, n. 1, p. 88-95, 2012-01-27.

Abstract

This work describes the preparation and characterization of cellulose/hydrous niobium phosphate hybrid with bleached cellulose from sugarcane bagasse. The hybrid was prepared in two different forms: named methods I and II. Method I consisted in dissolving metallic niobium in a fluoridric/nitric (100:10) mixture, with aging time of 16 hours in which the sugarcane bagasse was in contact with the acid solution. Phosphoric acid was then added to the solution for precipitation of the material. Method II was similar, but metallic niobium was diluted in a fluoridric /nitric (160/100) solution without aging time. In both methods different proportions of Cel/NbOPO4.nH2O were used: (10:10); (10:6) and (10:2). These materials were characterized by X-ray diffraction (XRD), thermogravimetry (TG/DTG) analysis and scanning electronic microscopy (SEM). The deposition of niobium phosphate and an increase in crystallinity were observed. (AU)

• FAPESP's process: 06/06740-2 - Preparation and characterization of hybrid from sugarcane bagasse / NbOPO4.nH2O and its application in membranes as filter element
• Grantee: Paulo Henrique Fernandes Pereira
• Support Opportunities: Scholarships in Brazil - Doctorate