Banca de DEFESA: FERNANDA VIEIRA AMORIM

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : FERNANDA VIEIRA AMORIM
DATE: 06/02/2024
TIME: 13:00
LOCAL: Programa de Pós-Graduação em Ciência de Materiais
TITLE:

Development of poly(butylene-adipate-co-terephthalate)/castor oil biocomposites with agro-industrial waste for food packaging

KEY WORDS:

Malt Bagasse, Biodegradation, Incubation, Corn Straw, PBAT.

PAGES: 92
BIG AREA: Outra
AREA: Multidisciplinar
SUMMARY:

Pollution caused by incorrect disposal of polymers is responsible for major environmental impacts, as the degradation of these polymers from non-renewable sources is quite slow. An alternative to minimize this impact on the environment is the use of biodegradable polymers, such as Poly(butylene-adipate-co-terephthalate) (PBAT) with the insertion of oils and vegetable residues, thus presenting good mechanical properties as well as high biodegradability in the environment and good processability especially for films, properties that produce a biocomposite suitable for packaging production. Thus, in this study, biodegradable matrix biocomposites (PBAT) were developed with castor oil (OM), residues with/without chemical treatment of malt bagasse (BM) or corn stover (PM). The waste that underwent chemical treatment was subjected to alkaline treatment of 2, 4 and 6% in an autoclave, at 121°C and 1 atm, for 10, 20 and 30 min. Subsequently, the biocomposites were processed, containing a load of 5, 10 and 15% of waste, in natura and treated with 5% OM, in a mini-extruder and characterized by Infrared Spectroscopy (FTIR), X-ray Diffraction ( XRD), Scanning Electron Microscopy (SEM) and Thermogravimetry (TG). The alkaline treatment of the residue proved to be more efficient in removing the hemicellulose and lignin present. Another relevant result concerns the thermal stability of the PBAT matrix during processing, which may be attributed to the insertion of fibers. The residues in PBAT biocomposites improved the biodegradation process, accelerating the degradation process in simulated soil, reaching complete biodegradation in 6 months of PBAT+BM+OM, consistent with morphological images indicating cavities, ersion and roughness on the surface of the films where these physical changes indicate biodegradation. This shows the efficiency of our developed biodegradation system.

COMMITTEE MEMBERS:
Presidente - 1283002 - YEDA MEDEIROS BASTOS DE ALMEIDA
Interna - 1356402 - CAROLINA LIPPARELLI MORELLI
Interno - 1354207 - SEVERINO ALVES JUNIOR
Externo ao Programa - 1056845 - FELIPE PEDRO DA COSTA GOMES - UFPEExterna à Instituição - MICHELLE FÉLIX DE ANDRADE - UFPE