Banca de QUALIFICAÇÃO: CAROLINA LIMA DE ALMEIDA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : CAROLINA LIMA DE ALMEIDA
DATE: 28/02/2020
TIME: 09:00
LOCAL: SALA DE AULAS PPGCEM
TITLE:

Analysis and characterization of Rostchildia sp. cocoons and biomimetic fibrous mats obtained by Solution Blow Spinning

KEY WORDS:

Rothschildia sp., cocoon, fibers

PAGES: 59
BIG AREA: Engenharias
AREA: Engenharia de Materiais e Metalúrgica
SUMMARY:

The study of biomimetics has been growing mostly in materials that can be used in medical applications. An attempt of synthetic reproduction of the properties found in a cocoon of the butterfly Rothschildia sp., using biodegradable polymers is the objective of this study. The Solution Blow Spinning (SBS) method was used to produce polycaprolactone (PCL) and poly (lactic acid) (PLA) fibers, with the addition of hydroxyapatite, using a rotating collector. The solutions obtained have chloroform and acetone as a solvent and were spun according to the same variables. The cocoon studied was characterized by TG, DSC, FTIR, SEM and Tensile Test, whereas the samples obtained by SBS had their characteristics observed so far by their visual aspect, DSC and FTIR. The results showed that it was possible to obtain fibers from the method used, due to their visual aspect, as well as proving that there was no chemical change in the samples, because did not show changes in the thermal behavior or in the expected composition for the materials used. The cocoon showed good thermal stability, with a melting point close to 300 ° C, composed of fibroin and sericin, observed by FTIR, with a fiber morphology and good tensile strength. It is still necessary to perform SEM of the samples obtained by SBS, to reaffirm the hypothesis of the formation of fibers and compare them with those found in the cocoon, proceeding to the pressing process, looking for the morphology and tensile strength found in the cocoon.

BANKING MEMBERS:
Presidente - 1202134 - JOSE DANIEL DINIZ MELO
Interna - 1755267 - MARIA CAROLINA BURGOS COSTA DO NASCIMENTO
Externo à Instituição - ELITON SOUTO DE MEDEIROS - UFPB