Hydrothermal Carbon as Reactive Fillers to Produce Sustainable Biocomposites with Aromatic Bio-Based Epoxy Resins - Institut de Chimie de Nice (ICN) - Université Côte d'Azur Accéder directement au contenu
Article Dans Une Revue Polymers Année : 2021

Hydrothermal Carbon as Reactive Fillers to Produce Sustainable Biocomposites with Aromatic Bio-Based Epoxy Resins

Iuliana Bejenari
  • Fonction : Auteur
Roxana Dinu
  • Fonction : Auteur
Sarah Montes
  • Fonction : Auteur
Irina Volf
  • Fonction : Auteur
Alice Mija
  • Fonction : Auteur
  • PersonId : 1004857

Résumé

This work is focused on the development of sustainable biocomposites based on epoxy bioresin reinforced with a natural porous material (hydrochar, HC) that is the product of spruce bark wastes subjected to hydrothermal decomposition. To identify the influence of hydrochar as a reinforcing material on the designed composites, seven formulations were prepared and tested. An aromatic epoxy monomer derived from wood biomass was used to generate the polymeric matrix, and the formulations were prepared varying the filler concentration from 0 to 30 wt %. The reactivity of these formulations, together with the structural, thermal, and mechanical properties of bio-based resin and biocomposites, are investigated. Surprisingly, the reactivity study performed by differential scanning calorimetry (DSC) revealed that HC has a strong impact on polymerization, leading to an important increase in reaction enthalpy and to a decrease of temperature range. The Fourier Transform Infrared Spectroscopy (FT-IR) investigations confirmed the chemical bonding between the resin and the HC, while the dynamic mechanical analysis (DMA) showed increased values of crosslink density and of storage moduli in the biocomposites products compared to the neat bioresin. Thermogravimetric analysis (TGA) points out that the addition of hydrochar led to an improvement of the thermal stability of the biocomposites compared with the neat resorcinol diglycidyl ether (RDGE)-based resin (T5% = 337 °C) by ≈2–7 °C. Significantly, the biocomposites with 15–20 wt % hydrochar showed a higher stiffness value compared to neat epoxy resin, 92SD vs. 82SD, respectively.

Domaines

Chimie

Dates et versions

hal-03280153 , version 1 (07-07-2021)

Identifiants

Citer

Iuliana Bejenari, Roxana Dinu, Sarah Montes, Irina Volf, Alice Mija. Hydrothermal Carbon as Reactive Fillers to Produce Sustainable Biocomposites with Aromatic Bio-Based Epoxy Resins. Polymers, 2021, 13 (2), pp.240. ⟨10.3390/polym13020240⟩. ⟨hal-03280153⟩
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