Banca de DEFESA: MYRNA ALBUQUERQUE FONSECA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MYRNA ALBUQUERQUE FONSECA
DATE: 26/11/2025
TIME: 14:00
LOCAL: https://meet.google.com/ogg-huxy-umx
TITLE:

ANTIMICROBIAL FUNCTIONALIZATION OF GAUZE DRESSING

KEY WORDS:

cotton gauze; silver nanoparticles; functionalization; antimicrobial activity.

PAGES: 57
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Tecnologia Química
SPECIALTY: Têxteis
SUMMARY:

The management of cutaneous wounds is a dynamic process that depends on the progression of the healing phases and involves the use of various dressings. However, growing bacterial resistance makes it urgent to seek new technological strategies to optimize tissue repair. In this study, gauze pads made of 100% cotton or a viscose-polyester blend were initially treated with a chitosan solution and then impregnated with silver nanoparticles (AgNPs). The functionalized samples were characterized by scanning electron microscopy, energy-dispersive spectroscopy (SEM-EDS), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR) to determine the arrangement, crystalline organization, and chemical interactions between chitosan and AgNPs. In vitro antimicrobial activity against Staphylococcus aureus was evaluated using the disk diffusion assay. SEM-EDS results confirmed uniform attachment of the nanoparticles to the fiber surface, while XRD diffractograms and FTIR spectra revealed structural changes suggestive of interactions between chitosan and silver. Additionally, the functionalized gauze exhibited a significant zone of bacterial inhibition, demonstrating its antimicrobial efficacy. It is concluded that AgNP impregnation confers promising properties to gauze compresses for use in advanced dressings, contributing to the development of healthcare materials that aid in preventing infections and accelerating wound healing.

COMMITTEE MEMBERS:
Externo ao Programa - 1345675 - CLOVIS DE MEDEIROS BEZERRA - UFRNPresidente - 1150673 - IRIS OLIVEIRA DA SILVA
Interna - 2614285 - KESIA KARINA DE OLIVEIRA SOUTO SILVA
Externa à Instituição - MICHELLE DE MEDEIROS AIRES