Banca de DEFESA: JOSÉ CLAUDIANO DANTAS NETO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : JOSÉ CLAUDIANO DANTAS NETO
DATE: 14/08/2025
TIME: 14:00
LOCAL: Auditório do CCET/Virtual
TITLE:

ESPUMAS BIONANOCOMPOSITAS SUSTENTÁVEIS DE PECTINA COM ARGILAS NATURAIS E MODIFICADAS: SÍNTESE, CARACTERIZAÇÃO E COMPARAÇÃO ENTRE DIFERENTES TIPOS DE ARGILA

KEY WORDS:

Bionanocomposites; Clays; Pectin; Low-density foams; Sustainability; Characterization.

PAGES: 92
BIG AREA: Engenharias
AREA: Engenharia de Materiais e Metalúrgica
SUMMARY:

Bionanocomposites are hybrid materials composed of a natural polymeric matrix and inorganic nanofillers, such as clays, which have emerged as sustainable alternatives to synthetic low-density materials, such as polystyrene foams. Despite their widespread use, these synthetic materials are environmentally unfeasible due to their non-biodegradable nature and the release of toxic compounds during combustion. In this work, low-density bionanocomposite foams were developed by combining pectin, a biodegradable plant-based biopolymer, with different types of clays: fibrous (palygorskite and sepiolite), lamellar (montmorillonite with and without pillaring, kaolinite), in addition to porous materials such as diatomite and modified clays (FCA and FCI). The formulations underwent synthesis optimization and were freeze-dried to obtain the foams. The materials were structurally and morphologically characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM). Physical and mechanical properties were evaluated through compression, water absorption and solubility tests, as well as flame resistance assays. The results demonstrated that the incorporation of different clays into the pectin matrix enables tuning of the final foam properties, resulting in lightweight, porous materials with enhanced performance. The developed foams show potential to replace synthetic materials in applications requiring low weight, mechanical strength, and greater environmental safety, highlighting the technological and ecological appeal of these bionanocomposites.

COMMITTEE MEMBERS:
Externo à Instituição - ADONAY RODRIGUES LOIOLA - UFC
Externo à Instituição - FABIO GARCIA PENHA - IFRN
Interno - 1350249 - RUBENS MARIBONDO DO NASCIMENTO
Presidente - 1308577 - SIBELE BERENICE CASTELLA PERGHER
Externo ao Programa - 1149328 - VALTER JOSE FERNANDES JUNIOR - null