Use este identificador para citar o ir al link de este elemento:
http://hdl.handle.net/1843/54299| Tipo: | Artigo de Periódico |
| Título: | Polyurethane foams for thermal insulation uses produced from castor oil and crude glycerol biopolyols |
| Autor(es): | Camila Santana Carriço Thaís Fraga Vagner Eustáquio de Carvalho Vânya Márcia Duarte Pasa |
| Resumen: | Rigid polyurethane foams were synthesized using a renewable polyol from the simple physical mixture of castor oil and crude glycerol. The effect of the catalyst (DBTDL) content and blowing agents in the foams’ properties were evaluated. The use of physical blowing agents (cyclopentane and n-pentane) allowed foams with smaller cells to be obtained in comparison with the foams produced with a chemical blowing agent (water). The increase of the water content caused a decrease in density, thermal conductivity, compressive strength, and Young’s modulus, which indicates that the increment of CO2 production contributes to the formation of larger cells. Higher amounts of catalyst in the foam formulations caused a slight density decrease and a small increase of thermal conductivity, compressive strength, and Young’s modulus values. These green foams presented properties that indicate a great potential to be used as thermal insulation: density (23–41 kg·m−³), thermal conductivity (0.0128–0.0207 W·m−¹·K−¹), compressive strength (45–188 kPa), and Young’s modulus (3–28 kPa). These biofoams are also environmentally friendly polymers and can aggregate revenue to the biodiesel industry, contributing to a reduction in fuel prices. |
| Asunto: | Química da biomassa Oleo de ricino Oleo de mamona Glicerina Polímeros Polióis |
| Idioma: | eng |
| País: | Brasil |
| Editor: | Universidade Federal de Minas Gerais |
| Sigla da Institución: | UFMG |
| Departamento: | ICX - DEPARTAMENTO DE FÍSICA ICX - DEPARTAMENTO DE QUÍMICA |
| Tipo de acceso: | Acesso Aberto |
| Identificador DOI: | https://doi.org/10.3390/molecules22071091 |
| URI: | http://hdl.handle.net/1843/54299 |
| Fecha del documento: | 2017 |
| metadata.dc.url.externa: | https://www.mdpi.com/1420-3049/22/7/1091 |
| metadata.dc.relation.ispartof: | Molecules |
| Aparece en las colecciones: | Artigo de Periódico |
archivos asociados a este elemento:
| archivo | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| Polyurethane foams for thermal insulation uses produced from castor oil and crude glycerol.pdf | 3.89 MB | Adobe PDF | Visualizar/Abrir |
Los elementos en el repositorio están protegidos por copyright, con todos los derechos reservados, salvo cuando es indicado lo contrario.