| Revista: | Evidencia : biotecnologia e alimentos |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000429248 |
| ISSN: | 1519-5287 |
| Autors: | Assis, Adriana Helfenberger Coleto1 Munaro, Marilda1 |
| Institucions: | 1Universidade Federal do Parana, Curitiba, Parana. Brasil |
| Any: | 2015 |
| Període: | Jul-Dic |
| Volum: | 15 |
| Número: | 2 |
| Paginació: | 113-128 |
| País: | Brasil |
| Idioma: | Portugués |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | The polyester fibers have many applications in the fabrics manufacturing. The dyeing process consists in the fiber color-fixing step. There are three ways in which the textile materials can be dyed, by mass, in the form of threads and in the form of fabrics; but the dyeing of the threads is the most used for enabling a greater diversity and strength of colors. Water consumption in this step is very significant, and the strong color is the most striking feature of the textile effluent, a consequence of the large amount of non-fixed dyes during dyeing. Environmental policies encourage the development of new technologies that care for sustainability. Enzymes are natural products found in the human body and in the nature, they act quite specifically; therefore, they play a key role in the textile industry, as in the substitution of chemicals that have adverse impact on the environment. The use of enzymes provides superficial variations in the fibers, due to the formation of carboxylic groups, which facilitate dyeing. In this study, it was investigated the hydrolysis of polymer fibers for the optimization of dyeing process by exhaustion. In this study, superficial comparative analysis of the hydrolysis by enzymatic and alkaline treatment was carried out to analyze the formation of acid groups, improvement in the fixation of dyes and reduction of organic load of the effluent. Changes in the structure and properties of the materials were analyzed by mechanical testing, scanning electron microscopy (SEM), infrared spectroscopy with Fourier transform (FTIR), dynamic mechanical analysis (DMTA), reflectance spectroscopy and analysis of absorbance by spectrophotometer. The treatment by hydrolysis is shown as a viable alternative, enabling enhancement of the dyeing process by the reduction of the chemical oxygen demand, variation of acid sites and variation in consumption of dyes |
| Resumen en portugués | As fibras de poliéster possuem diversas aplicações na confecção de tecidos. O processo de tingimento consiste na etapa para a fixação de cor à fibra. Há três formas nas quais os materiais têxteis podem ser tingidos: em massa, na forma de fio e na forma de tecidos; sendo o tingimento dos fios o mais utilizado por possibilitar uma maior diversificação e solidez das cores. O consumo de água nessa etapa é bastante significativo, e a cor forte é a característica mais notória do efluente têxtil, consequência da grande quantidade de corantes não fixados durante o tingimento. Políticas ambientais incentivam o desenvolvimento de novas tecnologias que prezem pela sustentabilidade. As enzimas são produtos naturais encontrados no corpo humano e na natureza e agem de forma bastante específica; por essa razão desempenham papel fundamental na indústria têxtil, como na substituição de produtos químicos que têm impacto negativo sobre o meio ambiente |
| Disciplines | Ingeniería |
| Paraules clau: | Ingeniería química, Degradación, Poliéster, Fibras, Teñido, Hidrólisis, Lipasas |
| Keyword: | Chemical engineering, Degradation, Polyester, Fibers, Dyeing, Hydrolysis, Lipases |
| Text complet: | Texto completo (Ver PDF) |
