Banca de DEFESA: RITA KÁSSIA DA SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : RITA KÁSSIA DA SILVA
DATA : 27/02/2019
HORA: 08:00
LOCAL: Auditório do Centro de Tecnologia - UFRN
TÍTULO:

OBTAINING MICELLAR SYSTEMS OF TYPE O/W WITH ESSENTIAL OILS FOR APPLICATIONS IN TEXTILE MATERIALS

PALAVRAS-CHAVES:

Chitosan. Essential oil. Substrate Textile. Antimicrobial. Nanoemulsion.

PÁGINAS: 149
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
RESUMO:

Essential oils (OEs) are natural products that have a wide range of applications, encompassing different areas of activity. Searching for researchers due to their properties, essential oils have different functions, such as repellency, analgesic, antibacterial, antiparasitic, antirheumatic, anti-inflammatory, moisturizing and therapeutic actions. Chitosan (QTS) as a biopolymer of great diversity has effective properties with antimicrobial activity and also chelating action for surface modifications of textile substrates. This is due to the presence of amine groups in their chemical structure, which when acetylated at pH acids become positively charged, giving rise to its chelating action and its surface modifying potential. This work was developed in the production of nanoemulsions using the ternary phase diagram study, to define the ideal setting of the desired formulations, using chitosan as aqueous phase (Fa), a non-ionic surfactant (T80) and the addition of the properties of two essential oils as oily phase (Fo) for the production of nanoemulsions. For the characterization of the essential oils of andiroba (OEA) and lemon grass (OCL) were verified its density, molecular weight and its acidity, saponification, iodine, peroxidation and refraction indices as well as its real antimicrobial capacity. Nanoemulsions, also called micellar systems, were characterized by pH, electrical conductivity, viscosity, zeta potential, DLS, temperature resistance and microbial activity. The nanoemulsion systems used in the functionalization of the 100% cotton fabric by the layer-by-layer method with the purpose of promoting specific functionalities to the textile materials. Functional tissues were characterized by XRD and FTIR analysis to confirm their surface modification and the presence of the characteristic groups of the NEOEs forming components. Their solidity was also analyzed, confirming the permanence and durability of the antimicrobial finishing in the tissues.

 

 

 

MEMBROS DA BANCA:
Presidente - 2614285 - KESIA KARINA DE OLIVEIRA SOUTO SILVA
Interno - 2941160 - JOSE HERIBERTO OLIVEIRA DO NASCIMENTO
Externa à Instituição - ANDREA LIMA DE SA - F.M.Nassau
Externa à Instituição - CÁTIA GUARACIARA FERNANDES TEIXEIRA ROSSI - FANEC