期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 315, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2021.125711
关键词
Tannin-furanic-SPI foam; Flame retardancy; Thermal conductivity; LOI; Mechanism
资金
- National Natural Science Foundation of China [NSFC 31760187, 31971595]
- Program for Leading Talents of Science and Technology [2017HA013]
- Yunnan Provincial Reserve Talents for Middle & Young Academic and Technical Leaders [2019HB026]
- 111 Project
- French Agence Nationale de la Recherche (ANR), laboratory of excellence (LABEX) ARBRE
Recent research in the construction field focuses on developing biomass flame-retardants and thermally-insulating materials. By exploiting the synergistic effect of additives, flame-retardant tannin-furanic-SPI bio-foams with outstanding thermal insulation and smoke suppression performance were developed. These foams exhibit closed cell structures, good thermal stability, low thermal conductivity, and have potential applications as thermal insulation for buildings.
Owing to foreseable extensive shortages in petrochemical resources, energy consumption, and fire safety concerns, recent scientific research in the construction field has been aimed to develop biomass flame-retardants and thermally-insulating materials. Herein, flame-retardant tannin-furanic-SPI bio-foams with outstanding thermal insulation and smoke suppression performance were developed by exploiting the synergistic effect of additives (boric acid, phosphoric acid, and montmorillonite). Their physical and mechanical properties showed that these tannin-based foams are lightweight (82-122 kg/m(3)), with an acceptable compression strength (0.2-0.35 MPa), and a low pulverization ratio (5.97-12.06%). Moreover, the morphology, thermal stability, thermal conductivity, and flammability were evaluated by scanning electron microscopy (SEM), thermogravimetric analysis (TGA), thermal conductivity tests, limiting oxygen index (LOI), and cone calorimetry, respectively. These foams exhibited closed cell structures, good thermal stability, and low thermal conductivity. Their flammability results showed that higher LOI values were obtained in the range of 37.33-49.05% and that they had a relatively low peak-heat-release rate (PHRR) and total-smoke-produced (TSP). A possible flame retardancy mechanism was suggested. By comparing them to other commercial construction materials, the modified tannin-furanic-SPI foams with integrated properties, such as flame retardancy, thermal insulation, light-weight, environmental-friendliness, and acceptable mechanical properties, show potential applications as thermal insulation for buildings.
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