Título principal
Desenvolvimento de processos biotecnológico para preparação ao tingimento de tecido de malha 100% algodão [recurso eletrônico] / Lucas Luiz Vasselai ; orientadora, Catia Rosana Lange de Aguiar ; coorientadora Ana Julia Dal Forno
Data de publicação
2024
Descrição física
102 p. : il.
Nota
Disponível somente em versão on-line.
Dissertação (mestrado) – Universidade Federal de Santa Catarina, Centro Tecnológico de Ciências Exatas e Educação, Programa de Pós-Graduação em Engenharia Têxtil, Blumenau, 2024.
Inclui referências.
Desenvolvimento de processos biotecnológico para preparação ao tingimento de tecido de malha 100% algodão [recurso eletrônico] / Lucas Luiz Vasselai ; orientadora, Catia Rosana Lange de Aguiar ; coorientadora Ana Julia Dal Forno
Data de publicação
2024
Descrição física
102 p. : il.
Nota
Disponível somente em versão on-line.
Dissertação (mestrado) – Universidade Federal de Santa Catarina, Centro Tecnológico de Ciências Exatas e Educação, Programa de Pós-Graduação em Engenharia Têxtil, Blumenau, 2024.
Inclui referências.
Abstract: The presence of natural impurities in cotton fibers prevents water absorption, generating quality problems in the dyeing processes. Removal of this dirt is normally carried out by alkaline cleaning at high temperature. The harsh process conditions produce effluents with high COD and pH levels, in addition to causing cellulose manipulation, which reduces the strength of the fibers. However, biopurging also guarantees the removal of impurities, however, using less severe process conditions and does not harm the fibers. In the present work, the use of combined enzymes, pectinase, lipase and cellulase in the biopurging process of 100% cotton mesh was investigated. For this, the enzymes were described in terms of their activities under optimal conditions and the conditions proposed for the biopurging process, and in the presence of a surfactant agent. The influence of the agent on the enzymatic treatment was also proven when studying two different procedures, with the addition of the agent at the beginning of the process and with its addition only after 30 minutes of occurrence. The effect of each enzyme and its interactions was evaluated with the help of experimental planning and the characterization of the technical mesh (hydrophilicity, mass loss, degree of whiteness and subsequent dyeing). For comparative purposes, an alkaline purge was performed. The results show that the surfactant does not interfere with enzyme activity. Biopurging with the addition of surfactant at the beginning of the process and under conditions of pH 6.5 and temperature 55 °C revealed that the combination of the three enzymes at the maximum points of the experimental design presented the best results, a brightness degree of 24.92 oBerger and hydrophilicity of 14.36 s. Subsequently, biopurging was reproduced on a pilot scale, evaluating consumption, temperature and time with a view to establishing a preparation process under less severe conditions and financially viable.