Encontrados 3 documentos, a visualizar página 1 de 1
Cellulosic films obtained from the treatment of sugarcane bagasse fibers with N...
Ruzene, Denise S.; Silva, Daniel Pereira da; Vicente, A. A.; Teixeira, J. A.; Amorim, M. T. Pessoa de; Gonçalves, Adilson RobertoEthanol/water organosolv pulping was used to obtain sugarcane bagasse pulp that was bleached with sodium chlorite. This bleached pulp was used to obtain cellulosic films that were further evaluated by Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). A good film formation was observed when temperature of 74 °C and baths of distilled water w...
Studies of lignin and polysaccharides recovery from kraft liquor for biotechnol...
Cabral, Diana; Ruzene, Denise S.; Silva, Daniel Pereira da; Teixeira, J. A.; Gonçalves, Adilson RobertoAccording to the biorefinery concept, this study has the objective of evaluating alternatives for the valorization of all the kraft liquor fractions. This liquor consists mainly in lignin, cellulose and hemicellulose. Currently, cellulose pulp industries recover the cooking chemicals by burning and energy is introduced into the process. Sustainable development guidelines, regarding the costs and wastes reductio...
An alternative application to the portuguese agro-industrial residue : wheat straw
Ruzene, Denise S.; Silva, Daniel Pereira da; Vicente, A. A.; Gonçalves, Adilson Roberto; Teixeira, J. A.The effects of alkaline treatments of the wheat straw with sodium hydroxide were investigated. The optimal condition for extraction of hemicelluloses was found to be with 0.50 mol/l sodium hydroxide at 55 °C for 2 h. This resulted in the release of 17.3% of hemicellulose (% dry starting material), corresponding to the dissolution of 49.3% of the original hemicellulose. The yields were determined by gravimetric ...
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||