Silica Treatments: A Fire Retardant Strategy for Hemp Fabric/Epoxy Composites
AbstractIn this paper, for the first time, inexpensive waterglass solutions are exploited as a new, simple and ecofriendly chemical approach for promoting the formation of a silica-based coating on hemp fabrics, able to act as a thermal shield and to protect the latter from heat sources. Fourier Transform Infrared (FTIR) and solid-state Nuclear Magnetic Resonance (NMR) analysis confirm the formation of –C–O–Si– covalent bonds between the coating and the cellulosic substrate. The proposed waterglass treatment, which is resistant to washing, seems to be very effective for improving the fire behavior of hemp fabric/epoxy composites, also in combination with ammonium polyphosphate. In particular, the exploitation of hemp surface treatment and Ammonium Polyphosphate (APP) addition to epoxy favors a remarkable decrease of the Heat Release Rate (HRR), Total Heat Release (THR), Total Smoke Release (TSR) and Specific Extinction Area (SEA) (respectively by 83%, 35%, 45% and 44%) as compared to untreated hemp/epoxy composites, favoring the formation of a very stable char, as also assessed by Thermogravimetric Analysis (TGA). Because of the low interfacial adhesion between the fabrics and the epoxy matrix, the obtained composites show low strength and stiffness; however, the energy absorbed by the material is higher when using treated hemp. The presence of APP in the epoxy matrix does not affect the mechanical behavior of the composites. View Full-Text
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Branda, F.; Malucelli, G.; Durante, M.; Piccolo, A.; Mazzei, P.; Costantini, A.; Silvestri, B.; Pennetta, M.; Bifulco, A. Silica Treatments: A Fire Retardant Strategy for Hemp Fabric/Epoxy Composites. Polymers 2016, 8, 313.
Branda F, Malucelli G, Durante M, Piccolo A, Mazzei P, Costantini A, Silvestri B, Pennetta M, Bifulco A. Silica Treatments: A Fire Retardant Strategy for Hemp Fabric/Epoxy Composites. Polymers. 2016; 8(8):313.Chicago/Turabian Style
Branda, Francesco; Malucelli, Giulio; Durante, Massimo; Piccolo, Alessandro; Mazzei, Pierluigi; Costantini, Aniello; Silvestri, Brigida; Pennetta, Miriam; Bifulco, Aurelio. 2016. "Silica Treatments: A Fire Retardant Strategy for Hemp Fabric/Epoxy Composites." Polymers 8, no. 8: 313.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.