title: Image analysis of modified cellulose fibers from sugarcane bagasse by zirconium oxychloride.
abstract: Surface modification of natural fibers has been made using different methods. In this paper, cellulose fibers from sugarcane bagasse were bleached and modified by zirconium oxychloride in situ. The chemically modified cellulose fibers were compared to those of bleached ones. Cellulose fibers were modified with ZrO(2).nH(2)O nanoparticles through the use of zirconium oxychloride in acidic medium in the presence of cellulose fibers using urea as the precipitating agent. The spatial distribution characterization of hydrous zirconium oxide on cellulose fibers was carried out by combining both processing and image analyses obtained by SEM and statistical methodologies. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and thermogravimetric analysis (TG) were also used to characterize the nanocomposite. Results indicated that ZrO(2).nH(2)O nanoparticles of about 30-80nm diameter deposited on cellulose fibers were heterogeneously dispersed.
authors.affiliation: Engineering Department-UniFOA. Av. Paulo Erlei Alves Abrantes, Volta Redonda/RJ, Brazil. dmulinari@hotmail.com
authors.forename: D R
authors.initials: DR
authors.lastname: Mulinari
authors.forename: T G
authors.initials: TG
authors.lastname: Cruz
authors.forename: M O H
authors.initials: MO
authors.lastname: Cioffi
authors.forename: H J C
authors.initials: HJ
authors.lastname: Voorwald
authors.forename: M L C P
authors.initials: ML
authors.lastname: Da Silva
authors.forename: G J M
authors.initials: GJ
authors.lastname: Rocha
mesh_terms: D057886:Bleaching Agents / Q000494:pharmacology*; D002482:Cellulose / Q000737:chemistry*; D007091:Image Processing, Computer-Assisted; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry; D031786:Saccharum / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D013696:Temperature; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction; D015040:Zirconium / Q000494:pharmacology*
chemical_list: D057886:Bleaching Agents; D014867:Water; D002482:Cellulose; C027433:bagasse; D015040:Zirconium; C026090:zirconium oxychloride