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Mechanical,electrical, thermal and tribological behavior of epoxy resin composites reinforced with waste hemp-derived carbon fibers |
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| Authors: | Bartoli Mattia Duraccio Donatella Faga Maria Giulia Piatti Erik Torsello Daniele Ghigo Gianluca Malucelli Giulio |
| Affiliation: | 1.Center for Sustainable Future Technologies, Italian Institute of Technology, Via Livorno 60, 10144, Torino, Italy ;2.Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), Via G. Giusti 9, 50121, Firenze, Italy ;3.Institute of Sciences and Technologies for Sustainable Energy and Mobility, National Council of Research, Strada delle Cacce 73, 10135, Torino, Italy ;4.Department of Applied Science and Technology, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129, Torino, Italy ;5.Istituto Nazionale di Fisica Nucleare, Sez. Torino, Via P. Giuria 1, 10125, Torino, Italy ;6.Department of Applied Science and Technology, Politecnico di Torino, Viale Teresa Michel 5, 15121, Alessandria, Italy ; |
| Abstract: | Short hemp fibers, an agricultural waste, were used for producing biochar by pyrolysis at 1000 °C. The so-obtained hemp-derived carbon fibers (HFB) were used as filler for improving the properties of an epoxy resin using a simple casting and curing process. The addition of HFB in the epoxy matrix increases the storage modulus while damping factor is lowered. Also, the incorporation of HFB induces a remarkable increment of electrical conductivity reaching up to 6 mS/m with 10 wt% of loading. A similar trend is also observed during high-frequency measurements. Furthermore, for the first time wear of these composites has been studied. The use of HFB is an efficient method for reducing the wear rate resistance and the friction coefficient (COF) of the epoxy resin. Excellent results are obtained for the composite containing 2.5 wt% of HFB, for which COF and wear rate decrease by 21% and 80%, respectively, as compared with those of the unfilled epoxy resin. The overall results prove how a common waste carbon source can significantly wide epoxy resin applications by a proper modulation of its electrical and wear properties. Graphical abstract |
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