Banca de DEFESA: CHRISTIANE SIQUEIRA DE AZEVEDO SA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : CHRISTIANE SIQUEIRA DE AZEVEDO SA
DATE: 26/10/2020
TIME: 10:00
LOCAL: Remota – on-line (Plataforma ainda a definir)
TITLE:

OBTAINING NANOMETRICS SYSTEMS OF TYPE O/A OF Cymbopogon nardus L. AND Azadirachta indica A. Juss OILS FOR THE APPLICATION IN TEXTILE MATERIALS FOR THE HEALTH AREA

KEY WORDS:

Micro emulsions; Citronella (Cymbopogon nardus L.) oil; Neem (Azadirachta indica A. Juss) oil;  Chitosan; Antimicrobial agents; Soy fabric; Functionalization.

PAGES: 133
BIG AREA: Engenharias
AREA: Engenharia Mecânica
SUMMARY:

Functional textile materials have been extensively researched and developed to be used in different areas of science, environment, and technological materials. With the help of natural polymers, we can develop products with various properties and endless applications. The increase in consumption and the variety of the use of textiles in the health area have been expanding. There is  a vast  need for new methodologies that provide specific properties to textile materials such as biocompatibility, high resistance to acids, alkalis and microorganisms, good dimensional stability, flexibility, absence of impurities, absorption/repellency to liquids, among others. Therefore, this research proposes to develop a functional textile material with antimicrobial properties, to obtain nanometric systems of type the O/A (OIL/WATER) to solubilize citronella oil (Cymbopogon nardus L.) and neem (Azadirachta indica A. Juss) as antimicrobial agents to be applied to the textile substrate. Chitosan is a bioactive natural polymer and has a wide variety of applications due to its properties, and also being an antimicrobial agent. In this work, it has been used as a surface modifying agent of a soy fabric. The essential oils were obtained commercially and reduced in microemulsions, using two types of emulsifiers, surface-active agents, tween 80 and a natural agent produced from neem oil. Two formulations of microemulsions with particle sizes on a nanoscale and good chemical stability with antimicrobial properties were developed. Analyses were performed to characterize the oils, the natural surface active agent, the microemulsions and the functionalized fabric. Antimicrobial activities against Staphylococcus aureus and Escherichia coli bacteria were evaluated, where bacterial growth was inhibited for each of the formulations of the nanometric systems.

BANKING MEMBERS:
Externo à Instituição - ANDREA ZILLE - UMinho
Externa à Instituição - CÁTIA GUARACIARA FERNANDES TEIXEIRA ROSSI - FANEC
Externa ao Programa - 1150673 - IRIS OLIVEIRA DA SILVA
Interno - 2941160 - JOSE HERIBERTO OLIVEIRA DO NASCIMENTO
Externa ao Programa - 2614285 - KESIA KARINA DE OLIVEIRA SOUTO SILVA
Presidente - 182.221.614-15 - RASIAH LADCHUMANANANDASIVAM - UFRN