Cellulose Nanofibers
Mostrando 1-12 de 12 artigos, teses e dissertações.
-
1. Agroindustry Residues as a Source for Cellulose Nanofibers Production
Our study was motivated by the large amount of crop residues produced in Brazil, which represent underutilized waste biomass and a serious threat to the environment because of the landfilling. For example, even though the corn crop is not popular in Brazil, it is produced in the area of around 18-20 million hectares with an average production of 5-6 t ha-1.
J. Braz. Chem. Soc.. Publicado em: 2021-04
-
2. CELLULOSE NANOFIBERS FROM CASSAVA AGRO-INDUSTRIAL WASTE AS REINFORCEMENT IN PVA FILMS
Cellulose nanofibers (CNF) have been applied in composite systems due to the abundance of raw material, excellent mechanical and thermal properties. In this work, CNF was prepared from agroindustrial waste and used in specified amounts in polyvinyl alcohol (PVA) composites. The FTIR spectra of CNF, chemically purified cellulose (CPC) and Cassava Agro-industr
Quím. Nova. Publicado em: 2020-06
-
3. Characterization of Nanocellulose Obtained from Cereus Forbesii (a South American cactus)
Crystalline cellulose nanofibers are obtained from the bark of Cereus Forbesii, a cactus native to the arid areas of South America. The obtaining of cellulose nanofibers was carried out in several steps: pretreatment of the raw material, elimination of hemicellulose and lignin to obtain cellulose, and an acid hydrolysis of cellulose to obtain crystalline cel
Mat. Res.. Publicado em: 20/01/2020
-
4. ISOLATION AND CHARACTERIZATION OF NANOFIBRILLATED CELLULOSE FROM OAT HULLS
The objectives of this work were to investigate the microstructure, crystallinity and thermal stability of nanofibrillated cellulose obtained from oat hulls using bleaching and acid hydrolysis at a mild temperature (45 ºC) followed by ultrasonication. The oat hulls were bleached with peracetic acid, and after bleaching, the compact structure around the cell
Quím. Nova. Publicado em: 2015-05
-
5. Optically transparent membrane based on bacterial cellulose/polycaprolactone
Optically transparent membranes from bacterial cellulose (BC)/polycaprolactone (PCL) have been prepared by impregnation of PCL acetone solution into dried BC membranes. UV-Vis measurements showed an increase on transparency in BC/PCL membrane when compared with pristine BC. The good transparency of the BC/PCL can be related to the presence of BC nanofibers a
Polímeros. Publicado em: 20/02/2013
-
6. Hidrólise de polpa de sisal como via de produção de etanol e materiais / Sisal pulp hydrolysis for the production of ethanol and materials
A possível escassez dos recursos fósseis, juntamente com o aumento imprevisível dos respectivos preços, levou, nas últimas décadas, a um aumento considerável de iniciativas dedicadas não só à procura de fontes alternativas de produtos químicos e polímeros a partir de fontes renováveis, mas também de fontes alternativas de energia - em particula
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/04/2012
-
7. Desenvolvimento e caracterização de nanofibras de acetato de celulose para liberação controlada de fármacos / Development and characterization of cellulose acetate nanofibers for controlled release of drugs
Este projeto foi desenvolvido em duas fases, usando a tecnologia de eletrofiação. A primeira fase foi dedicada a obtenção de membranas eletrofiadas com acetato de celulose, as quais formaram nanofibras que foram carregadas com Sulfato de gentamicina, na segunda fase, para estudos da liberação controlada deste fármaco. Na primeira fase as membranas de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/02/2012
-
8. Mango puree edible films reinforced with cellulose nanofibers.
2009
INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS. Publicado em: 2011
-
9. Nanocomposite edible films from mango puree reinforced with cellulose nanofibers.
2009
Journal of Food Science. Publicado em: 2011
-
10. Extraction and characterization of natural fibers from the Pantanal.
The study of fibers from the Pantanal has been performed with the purpose if assisting research related to nanofibers and nanocomposites as fillers in polymer matrices. Were perfomed to characterize the plant species of the Pantanal (bocaiuva, tucum, taboa and camalote) on the content of lignin, hemicellulose and cellulose. By the process of calendering, the
INTERNATIONAL CONFERENCE ON FOOD AND AGRICULTURE APPLICATIONS OF NANOTECHNOLOGIES - NanoAgri. Publicado em: 2011
-
11. Preparation of cellulose nanofibers from curaua fibers to develop eva/cellulose nanocomposites / Preparação de nanofibras de celulose a partir de fibras de curauá para desenvolvimento de nanocompósitos poliméricos com EVA
The objective of the current project was the obtainment of cellulose nanofibers from curaua fibers and their application on the development of polymeric nanocomposites with EVA. A study of cellulose extraction according to the pre-treatment of the curaua fibers (mercerization with 5, 10, 15 and 17.5% NaOH solutions), acid solution used in acid hydrolysis (su
Publicado em: 2010
-
12. Utilization of cassava starch for the preparation of new termoplastic materials / Utilização de amido de mandioca na preparação de novos materiais termoplásticos
In this work it was studied the development of thermoplastic starches (TPS) prepared from raw cassava root and its derivatives, starch and bagasse (residue). The TPS were prepared by melt-processing employing glycerol as plasticizer in distinct proportions. It was searched for alternatives that could improve both, the mechanical performance and resistance to
Publicado em: 2007