Banca de DEFESA: ARTHUR FELIPE MATIAS ALVES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ARTHUR FELIPE MATIAS ALVES
DATE: 07/02/2022
TIME: 08:00
LOCAL: meet.google.com/hcn-axzg-gkw
TITLE:

RECYCLED PET/COTTON FIBERS WASTE/MONTMORILLONITE CLAY HYBRID COMPOSITE FOR TECHNICAL TEXTILE APPLICATIONS

KEY WORDS:

Recycled poly(ethylene terephthalate), hybrid composite, cotton fibers, montmorillonite clay, EMA-GMA, EBGMA and silver

PAGES: 98
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Tecnologia Química
SPECIALTY: Têxteis
SUMMARY:

Hybrid composite materials have been developed with the aim of meeting the needs of the market in order to expand the range of applications, as they provide varied properties according to the combined action of the loads used. The objective of this work was to process and characterize recycled poly(ethylene terephthalate) matrix composites (PETrec), using as fillers: waste from the brushing process of textile beneficiation (RE) and montmorillonite clay (MMT), and, syntheses of silver nanoparticles dispersed in montmorillonite clay were carried out to evaluate the silver-clay-polymer interaction, and also, the interfacial compatibilization agents were used, the ethylene - butyl acrylate - glycidyl methacrylate terpolymer (EBGMA) and the ethylene – methyl acrylate – glycidyl methacrylate terpolymer (EMA-GMA). All the formulations studied went through a processing step in a single screw extruder for the incorporation of the loads, then the materials were processed in a twin screw extruder for dispersion and homogenization of the polymer composites and, later, the materials were molded by injection and were plasticization for the manufacture of textile filaments in a single screw extruder. Preliminary characterizations were performed using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) on the PETrec and RE samples, evaluating their properties, compositions and length of the cellulose fibers. After processing, the formulations were characterized by measurements of flow index (MFI), X-ray diffraction (XRD), Shore D hardness, mechanical behavior under uniaxial tension, titration, analysis by optical microscopy (OM) and scanning electron microscopy (SEM). The MFI results showed that the addition of the fillers: RE and MMT, and the compatibilizers: EBGMA and EMA-GMA, as well as the addition of MMT-Ag in the PETrec matrix reduced the fluidity, that is, it increased the viscosity of the polymer composites. The results of X-ray diffraction of composites with montmorillonite clay, as well as the simultaneous addition of different charges in the formation of hybrid composites, and the addition of compatibilizing agents and, as well as silver, showed evidence of intercalation and exfoliation of the lamellae of the clay in polymer nanocomposites. Shore D hardness tests did not show significant variations with the addition of different loads and interfacial compatibilizers. The results of tensile tests of the specimens showed that the RE did not change the properties under tension, and the MMT and MMT-Ag increased the maximum strength of the polymer composite. The use of EMA-GMA increased maximum strength and elongation at break when compared to EBGMA. It was concluded that the use of fillers: RE, MMT and MMT-Ag, as well as the use of: EBGMA and EMA-GMA, favored the use of these materials for applications in the textile area.

BANKING MEMBERS:
Presidente - 1639676 - EDSON NORIYUKI ITO
Externa ao Programa - 1150673 - IRIS OLIVEIRA DA SILVA
Externo à Instituição - ADRIANO LINCOLN ALBUQUERQUE MATTOS - EMBRAPA
Externa à Instituição - JUCIKLÉCIA DA SILVA REINALDO - UFRN