Banca de DEFESA: CAMILA NILMA DE LIMA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : CAMILA NILMA DE LIMA
DATE: 27/02/2020
TIME: 14:00
LOCAL: Centro de Tecnologia
TITLE:

OPTIMIZATION OF POLYESTER FIBER DYEING PROCESS USING COUMARIN AS CARRIER.

KEY WORDS:

Coumarin, carrier, dyeing, polyester, low temperature.

PAGES: 123
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Tecnologia Química
SPECIALTY: Têxteis
SUMMARY:

The textile industry is largely responsible for generating effluents, and polyester dyeing, the most widely used fiber in the world today, is a major contributor, given that its conventional process typically makes use of highly toxic chemicals. (dyes, surfactants, acids, carriers, etc.) and / or extremely high temperatures. In this context, this work aims to study the implementation of an alternative carrier, coumarin, which allows the dyeing of polyester fiber at temperatures below that used in a conventional process (130 ° C), in order to obtain intense  and solid colors and the decrease in the amount of energy used in this process. In the study of the implementation of this alternative carrier, the color strength, uniformity and color resistance of the dyed substrates are evaluated. The samples were characterized for mechanical, morphological, chemical and coloristic properties before and after dyeing. Technologies such as Dynamometer, Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), Dispersive Energy Spectroscopy (EDS), Reflectance and Absorbance Spectroscopy were used. The results showed that with the use of coumarin it is possible to increase the color strength of the dyeing by about five times at 90°C and to increase the color intensity at 100°C by approximately three times when compared to the dyes under the same conditions in the absence of dyeing. carrier, with excellent uniformity. However, at temperatures close to 130°C very similar results are obtained in samples with and without the use of coumarin, showing that the kinetic energy of the dye molecules and the opening of amorphous zones at elevated temperatures are essential for greater diffusion of the dye into the fiber.

BANKING MEMBERS:
Presidente - 2614285 - KESIA KARINA DE OLIVEIRA SOUTO SILVA
Interno - 2052404 - FERNANDO RIBEIRO OLIVEIRA
Interno - 2941160 - JOSE HERIBERTO OLIVEIRA DO NASCIMENTO
Externa à Instituição - CÁTIA GUARACIARA FERNANDES TEIXEIRA ROSSI - FANEC