Dyeing
Mostrando 13-24 de 56 artigos, teses e dissertações.
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13. Preparation and Performance of TiO2-ZnO/CNT Hetero-Nanostructures Applied to Photodegradation of Organic Dye
Water pollution by organic compounds is one of the major challenges faced by industries that use dyeing processes. Thus, some methods were developed for degrading dyes in wastewaters, including heterogeneous photocatalysis by semiconductor oxides. However, these oxides have limited photocatalytic activity due to the fast recombination of photogenerated elect
Mat. Res.. Publicado em: 03/10/2016
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14. INTERACTIONS: DESIGN, IMPLEMENTATION AND EVALUATION OF A COMPUTATIONAL TOOL FOR TEACHING INTERMOLECULAR FORCES IN HIGHER EDUCATION
Intermolecular forces are a useful concept that can explain the attraction between particulate matter as well as numerous phenomena in our lives such as viscosity, solubility, drug interactions, and dyeing of fibers. However, studies show that students have difficulty understanding this important concept, which has led us to develop a free educational softwa
Quím. Nova. Publicado em: 2015-12
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15. MICROEMULSÕES: COMPONENTES, CARACTERÍSTICAS, POTENCIALIDADES EM QUÍMICA DE ALIMENTOS E OUTRAS APLICAÇÕES
Microemulsions (MEs) are thermodynamically stable systems consisting of nanosized droplets dispersed in a solvent continuous medium (known as pseudo-phase), which is immiscible with the dispersed phase. These systems consist of water, a hydrophobic solvent called "oil," an amphiphile and often, a co-surfactant that is normally a medium chain alcohol. A large
Quím. Nova. Publicado em: 2015-11
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16. PREPARING AGRICULTURAL RESIDUE BASED ADSORBENTS FOR REMOVAL OF DYES FROM EFFLUENTS - A REVIEW
Abstract Industries engaged in dyeing operation generate coloured effluent due to the presence of spent dyes. Adsorption is among the various treatment processes employed for removal of dyes from effluents. Activated carbon is mostly used as an adsorbent in the treatment process. Attempts have been made by researchers to use non-conventional, low-cost, natur
Braz. J. Chem. Eng.. Publicado em: 2015-03
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17. Extraction of Indigo from Some Isatis species and Dyeing Standardization Using Low-technology Methods
Fresh leaves of four Isatis species culture form of I. tinctoria L and wild forms of I. buschiana Schischkin, I. candolleana Boiss. (endemic) and I. tinctoria L. subsp. corymbosa. (Boiss.) were used for indigo production. Dyes were extracted by fermentation and hot water application. The extracted dyes were optimized with different pH and reducing agents. Re
Braz. arch. biol. technol.. Publicado em: 2015-02
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18. A química e toxicidade dos corantes de cabelo
The market for hair dye involves a growing range of products, which requires greater understanding of hair properties, mechanisms of action and color development. In this work, we present a critical analysis of the classification, physical and chemical characteristics, chemical analysis and toxicological/mutagenic potential of dyes used in the hair dyeing pr
Quím. Nova. Publicado em: 2014-07
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19. Utilização de quitina e mordente na remoção do corante preto Remazol B por adsorção / Use of chitin and mordant in the removal of Remazol black B dye by adsorption
In this work was investigate the physical-chemical treatment for the removal Remazol Black B dye reagent by adsorption using chitin isolated from industrial waste (exoskeleton shrimp). The extraction of chitin was made from industrial waste of shrimp (exoskeleton of shrimp) in the decolorization treatment with NaClO, followed by deproteinization of alkali so
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/05/2012
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20. Application of enzymes in leather processing: a comparison between chemical and coenzymatic processes
The use of biotechnology by tanneries has increased in recent years. Enzymes can be applied during different steps of the leather production process: soaking, dehairing, bating, dyeing, degreasing or in effluent and solid waste treatment. This study evaluated the performance of five commercial enzymes in soaking and unhairing/liming by comparing the chemical
Braz. J. Chem. Eng.. Publicado em: 2012-09
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21. Pós-tratamento de efluente têxtil usando coagulação/floculação combinado com processos de separação por membranas
The textile industry uses large volumes of water in their processes, especially in the dyeing step, which are also used large quantities of coloring agents and textile auxiliaries. The presence of these products in the effluent generates a harmful effect and clearly visible to the environment because they cause changes in the parameters of the receiving body
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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22. Tratamentos térmico e corona em tecido de poliéster / Thermal and corona treatments in polyester fabric
O tratamento térmico, que na indústria têxtil é mais conhecido como termofixação, é um processo muito importante para garantir a estabilidade dimensional do tecido de poliéster durante os processos de beneficiamento e no uso. Mas o processo de termofixação modifica algumas propriedades do tecido e entre elas podemos destacar: Hidrofilidade, comport
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/06/2011
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23. Tratamento de banhos de tingimento têxtil por processos foto-Fenton e avaliação da potencialidade de reuso
In this work the treatment of textile dyeing baths by a sequential reductive-oxidative process was evaluated, aiming its utilization in new dyeing process. The results demonstrated that reactive dyes can be easily degraded by reductive processes mediated by zero-valent iron, a fact that induces decolorizations of about 80%. Sequential photo-Fenton processes
Química Nova. Publicado em: 2010
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24. Aplicação de ciclodextrinas em processos têxteis
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 encapsula
Química Nova. Publicado em: 2010