Natural fiber reinforced inorganic foam composites from short hemp bast fibers obtained by mechanical decortation of unretted stems from the wastes of hemp cultivations
| Autor: | Massimo Viscardi, Barbara Galzerano, Giuseppina Barra, Gianluca Viscusi, Letizia Verdolotti, Giuliana Gorrasi |
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| Přispěvatelé: | Viscusi, G., Barra, G., Verdolotti, L., Galzerano, B., Viscardi, M., Gorrasi, G. |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Sodium ascorbate Materials science Natural fiber reinforced composites (NFCs) Foaming agent 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences chemistry.chemical_compound Compressive strength Thermal conductivity chemistry Diatomite source Hemp fiber 0103 physical sciences Bast fibre Wettability Wetting Fourier transform infrared spectroscopy Composite material Fiber reinforced foam 0210 nano-technology Natural fiber |
| Popis: | The wettability of hemp fibers, to be applied in fiber-reinforced foams, can be improved with several chemical treatments. In this paper, a innovative treatment with sodium ascorbate was evaluated. Untreated and treated fibers have been characterized using FTIR spectroscopy and TGA measurements. Furthermore, the feasibility of treated fibers was evaluated preparing diatomite-based fiber-reinforced foams. These materials were finally characterized by mechanical compressive strength and thermal properties (thermal conductivity). The fiber-reinforced foams have been produced using a diatomite natural source as a matrix. A suitable amount of Si powder and vegetable surfactant were used as chemical and physical foaming agents while a polysilicate solution was used as reactive crosslinker. The foams highlight low density, around 350 kg/m3, and low thermal conductivity (0.06 W/mK). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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