Banca de DEFESA: GABRIELLA AMORIM MUNIZ FALCÃO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : GABRIELLA AMORIM MUNIZ FALCÃO
DATE: 07/12/2022
TIME: 08:30
LOCAL: Programa de Pós-Graduação em Ciência de Materiais
TITLE:
KEY WORDS:

PCL, Organophilic clay, Permeability, Fibers, Composites.

PAGES: 135
BIG AREA: Outra
AREA: Multidisciplinar
SUMMARY:

The improper disposal of polymers is responsible for its accumulation in nature, generating great environmental impacts, since degradation of polymers from non-renewable sources is quite slow. A viable alternative to minimize this problem is the total or partial repacement of synthetic polymers by biodegradable polymers. Polycaprolactone (PCL) is considered one of the most promising polymers for the production of biodegradable film packaging. The present study deals with the production, characterization and properties of films composed of biodegradable matrix (PCL) with organophilic clay (C20A), corn straw and sugarcane bagasse. The effect of the different types of fillers inserted in the polymeric matrix was investigated by analyzing film permeability, biodegradation, mechanical and thermal properties. The compounds containing 1.3 and 5% clay and fibers were processed in an internal laboratory mixer and the torque rheometry curves were analyzed. The compositions used were granulated and extruded as flat films. The results show that the addition of small amounts of organophilic clay and fibers did not increase the degradation of the PCL polymeric matrix during processing. Clay and fibers addition to the polymeric matrix decreased the permeability to oxygen gases and carbon dioxide of the films manufactured. As expected, the tensile strength and modulus of the films increase and their elongation at break decreased with filler (clay and vegetable fibers) addition. DSC data show that the melting and crystallization temperatures of the composite films did not change with the addition of fibrous and particulate fillers.

COMMITTEE MEMBERS:
Externa à Instituição - ANNA RAFFAELA DE MATOS COSTA - UFCG
Interna - 1356402 - CAROLINA LIPPARELLI MORELLI
Externa à Instituição - JULIANA DE CASTRO MACÊDO FONSECA - UFRPE
Interno - 1354207 - SEVERINO ALVES JUNIOR
Presidente - 1283002 - YEDA MEDEIROS BASTOS DE ALMEIDA