title: Cellulose fibers extracted from rice and oat husks and their application in hydrogel.
abstract: The commercial cellulose fibers and cellulose fibers extracted from rice and oat husks were analyzed by chemical composition, morphology, functional groups, crystallinity and thermal properties. The cellulose fibers from rice and oat husks were used to produce hydrogels with poly (vinyl alcohol). The fibers presented different structural, crystallinity, and thermal properties, depending on the cellulose source. The hydrogel from rice cellulose fibers had a network structure with a similar agglomeration sponge, with more homogeneous pores compared to the hydrogel from oat cellulose fibers. The hydrogels prepared from the cellulose extracted from rice and oat husks showed water absorption capacity of 141.6-392.1% and high opacity. The highest water absorption capacity and maximum stress the compression were presented by rice cellulose hydrogel at 25°C. These results show that the use of agro-industrial residues is promising for the biomaterial field, especially in the preparation of hydrogels.
authors.affiliation: Department of Agroindustrial Science and Technology, Federal University of Pelotas, Pelotas 96010-900, Brazil. Electronic address: jeanoliveira.alimentos@yahoo.com.br.
authors.forename: Jean Paulo de
authors.initials: JP
authors.lastname: Oliveira
authors.affiliation: Department of Agroindustrial Science and Technology, Federal University of Pelotas, Pelotas 96010-900, Brazil. Electronic address: graziellabruni@yahoo.com.br.
authors.forename: Graziella Pinheiro
authors.initials: GP
authors.lastname: Bruni
authors.affiliation: College of Chemistry and Food Engineering, Federal University of Rio Grande, 96201-900 Rio Grande, Brazil. Electronic address: karinah_ol@hotmail.com.
authors.forename: Karina Oliveira
authors.initials: KO
authors.lastname: Lima
authors.affiliation: Department of Agroindustrial Science and Technology, Federal University of Pelotas, Pelotas 96010-900, Brazil. Electronic address: shanisemell@hotmail.com.
authors.forename: Shanise Lisie Mello El
authors.initials: SLME
authors.lastname: Halal
authors.affiliation: Department of Chemical Engineering, Federal University of Pampa, 96413-170 Bagé, Brazil. Electronic address: gabysrosa@gmail.com.
authors.forename: Gabriela Silveira da
authors.initials: GSD
authors.lastname: Rosa
authors.affiliation: Department of Agroindustrial Science and Technology, Federal University of Pelotas, Pelotas 96010-900, Brazil. Electronic address: alvaro.guerradias@gmail.com.
authors.forename: Alvaro Renato Guerra
authors.initials: ARG
authors.lastname: Dias
authors.affiliation: Department of Agroindustrial Science and Technology, Federal University of Pelotas, Pelotas 96010-900, Brazil. Electronic address: elessandrad@yahoo.com.br.
authors.forename: Elessandra da Rosa
authors.initials: EDR
authors.lastname: Zavareze
mesh_terms: D018554:Avena / Q000737:chemistry*; D001672:Biocompatible Materials / Q000737:chemistry; D002482:Cellulose / Q000737:chemistry*; D020100:Hydrogels / Q000737:chemistry*; D012275:Oryza / Q000737:chemistry*; D011142:Polyvinyl Alcohol / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D001672:Biocompatible Materials; D020100:Hydrogels; D014867:Water; D011142:Polyvinyl Alcohol; D002482:Cellulose
keywords: Cellulose; Fibers; Hydrogel; Oat; Rice