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Pre-treatment of lignocellulosic biomass using ionic liquids: wheat straw fract...
Lopes, André; João, Karen; Rubik, Djonatam; Bogel-Lukasik, Ewa; Duarte, Luís C.; Andreaus, Jurgen; Bogel-Lukasik, R.This work is devoted to study pre-treatment methodologies of wheat straw with 1-ethyl-3-methylimidazolium acetate ([emim][CH3COO]) and subsequent fractionation to cellulose, hemicellulose and lignin. The method developed and described here allows the separation into high purity carbohydrate and lignin fractions and permits an efficient IL recovery. A versatility of the established method was confirmed by the IL...
Aplicação de ciclodextrinas em processos têxteis
Andreaus,Jürgen; Dalmolin,Mara C.; Oliveira Junior,Iguatemy B. de; Barcellos,Ivonete O.Cyclodextrins (CDs) are water soluble cyclic sugars with a hydrophobic nanometric cavity that permits the formation of host/guest inclusion complexes with a large variety of molecules, alternating their physical-chemical properties. In the present review CD research related to the processing of textiles is revised and discussed. CDs may function as encapsulating, dispersing and levelling agents in the dyeing an...
Reutilização de efluente de tingimentos de fibras acrílicas pós-tratamento foto...
Lucas,Mônica; Jeremias,Pâmela F. P. Toassi; Andreaus,Jürgen; Barcellos,Ivonete Oliveira; Peralta-Zamora,PatricioOn a laboratory scale effluents were produced from bichromic dyeing of acrylic fabrics with the basic dyes Blue Astrazon FGGL 300% and Yellow Gold Astrazon GL 200%. The residual dyeing baths were subjected to a photoelectrochemical treatment and reused in a second dyeing process. In the reutilization study, dyeings with treated effluent were compared with standard dyeings with distilled water. The results of dy...
Blenda de náilon-6,6/quitosana como adsorvente de corantes ácidos para reutiliz...
Barcellos,Ivonete O.; Andreaus,Jürgen; Battisti,Ana M.; Borges,Josélia K.A água é usada na indústria têxtil como veículo para os produtos químicos em geral e corantes utilizados no processo de tingimento e beneficiamento de fibras. Neste trabalho estudou-se a reutilização de rejeitos líquidos de tingimentos de tecidos de náilon 6,6 (PA 66), tratados pelo processo de adsorção, com uma blenda de PA 6,6/quitosana (80/20), na forma de flocos. Para a produção de rejeitos líquidos, realiz...
The application of catalase for the elimination of hydrogen peroxide residues a...
AMORIM,ALEXANDRA M.; GASQUES,MARCELO D. G.; ANDREAUS,JÜRGEN; SCHARF,MAUROResults of dyeing of cotton fabrics with a bifunctional reactive dye were significantly improved when the fabric after bleaching with hydrogen peroxide was treated with catalase for the elimination of hydrogen peroxide residues from the fabrics. Compared to processes with a varying number of washing steps, with and without commercial reducing agents, the consumption of water could be significantly reduced, with...
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