Banca de DEFESA: LUCAS LIMA COSTA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : LUCAS LIMA COSTA
DATE: 05/08/2022
TIME: 14:00
LOCAL: Remota
TITLE:

PARTICLEBOARD PRODUCED FROM SISAL (Agave sisalana) FOR RESIDENCIAL THERMAL INSULATION. 

KEY WORDS:

Thermal insulation. Sisal’s inflorescence. Sisaleira’s region. Reconstituted material. Castor oil-based polyurethane. Sustainabilit. Renewable.

PAGES: 144
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Construção Civil
SPECIALTY: Materiais e Componentes de Construção
SUMMARY:

The constructions of Brazilian semiarid are subjected to high temperature variability daily, this implies in unfavorable conditions to the habitations of this region related to the thermal performance. In the meantime, the use of technologies for thermal comfort of habitations shows inconveniences related to the application, since the consumption of nonrenewable raw materials, until the emission of polluting gases and harmful to human health. The development of a technology, based on vegetal and renewable materials to the thermal insulation on semiarid, would be in agreement with best modern practices to the sustainable development and less environmental impact. The sisal’s inflorescence (flecha) is a byproduct of Agave sisalana, specie explored in semiarid region to the production of fibers. However, the inflorescence is a sub estimated waste, it is found in oodles on the region which produces fibers from sisal, and according to the bibliography, it’s a lignocellulosic material and could be converted on reconstituted material, on the search for a thermal insulation solution to the edifications. Allied to this, the low thermal conductivity of cellulose  would become the developed panel a consistent thermal insulation solution to the edifications, with lower environment impact. The main goal of this word was to develop and to analyze a reconstituted material produced with sisal’s peduncle and polyurethane castor oil based resin, based in the affirmation of good thermal insulation of lignocellulosic materials. The sisal’s peduncle were characterized using the NBR 7190 (ABNT, 1997); The microstructure of the peduncle, the chemical composition e  the thermal degradation were also studied. The reconstitution process were made base on bibliography and the NBR 14810 (ABNT, 2002), the were also used to study the physical and mechanical properties of produced panels. The thermal conductivity were analyzed according to NBR 15220 (ABNT, 2005). The capacity to insulate was tested with the colorimeter method. It was also studied the level degradation of the panels using termites and the capacity of spread fire according to UL 94 V e H (Underwriters Laboratories Inc.,1998). The found results are in deal with the results found in literature; The thermal degradation analyzes shows the stability of the developed material to be used as residential thermal insulation material. The physical characteristics of material as thickness swelling and water absorption are higher than results found in references, however the density and moisture content were lower the literature. The mechanical characteristics are compatible with the panel classification and the thermal insulation capacity as well the thermal conductivity had a higher performance compared with vegetal and synthetic thermal insulation materials.

BANKING MEMBERS:
Presidente - 287176 - SANDRO FABIO CESAR
Interna - 287706 - RITA DIONE ARAUJO CUNHA
Externa à Instituição - JOYCE BATISTA AZEVEDO
Externo à Instituição - RUBENS MARIBONDO DO NASCIMENTO - UFRN