Bio-based epoxy clay nanocomposites

Rigail-Cedeño, Andrés; Schmidt, Daniel F.

doi:10.1063/1.5016710

Cited by 9 publications

(4 citation statements)

References 12 publications

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“…The crosslinking reaction should therefore take place at room temperature thanks to the reactivity of these functions. In contrast, the thermal stability of the crosslinked material is inferior to materials made from DGEBA (5% mass loss at 249 and 261 °C for resins crosslinked with Jeffamine EDR-148 and Jeffamine D-230, respectively) due to the absence of aromatic groups, but the mechanical properties of the materials obtained are fairly correct [152,153]. The bio-based carbon content depends on the bio-based nature of the ECH used for the Oglycidylation of sorbitol.…”

Section: Sorbitolmentioning

confidence: 96%

Bio-sourced monomers and cationic photopolymerization–The green combination towards eco-friendly and non-toxic materials

Pierau

Elian

Akimoto

et al. 2022

Progress in Polymer Science

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Section: Sorbitolmentioning

confidence: 96%

Bio-sourced monomers and cationic photopolymerization–The green combination towards eco-friendly and non-toxic materials

Pierau

Elian

Akimoto

et al. 2022

Progress in Polymer Science

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“…following network formation and 3) the intermolecular interactions of groups within the network [20]. In this study, unfilled systems with expected high degree of crosslinking [15] in both SGE/PEO and SGE/PPO cured networks showed similar Young's moduli in the ~1.3-1.5 GPa range. These results represent a lower level of stiffness compared to conventional aromatic epoxy/amine networks in glassy state [21] due to the inherent flexibility of such fully aliphatic networks.…”

Section: Resultsmentioning

confidence: 72%

“…That homogeneity is possible due to the interaction of oxygen and hydroxide groups present in the epoxy resin and those formed during the epoxy-amine reaction occurring together with hydroxide groups present in the biosilica. The hydrogen bonding interactions have been noticed in neat and filled epoxy-polyetheramine networks [15,[19][20][21]. No difference was observed in the diffractograms of the SGE/PEO and SGE/PPO cured networks.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Bio-Based Silica Reinforced Aliphatic Bio-Epoxy Composites

Rigail¹,

Avilés²,

Perugachi³

2017

Proceedings of the 15th LACCEI International Multi-Conference for Engineering, Education, and Technology: “Global Partnership F

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Composites of bio-based aliphatic poly-functional epoxy resin reinforced with high concentration of bio-silica were prepared by a solvent free method. The unmodified bio-silica (BS) was obtained from rice husk. Two amine hardeners were used: one was based on polyethylene oxide (PEO) and the other on polypropylene oxide (PPO). The epoxy-amine systems were reinforced with 10, 20, 30 and 40% weight fraction to the unreinforced epoxy resin. The structure and morphology of the BS was analyzed by X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM), respectively. These techniques were also used to determine the silica dispersion degree in the polymer matrix. Thermal characterization was carried out using a Differential Scanning Calorimetry (DSC) and Thermogravimetric Analyses (TGA). The glass transition temperature, Tg, increased significantly for both polyetheramine cured systems incorporating 10 wt% and 20 wt% of the BS; nevertheless, the best performance was observed in PEO networks. The thermal stability at 5% of weight loss temperature increased consistently with reinforcement concentration up to ~ 21% and ~ 10% compared to neat PEO and PPO cured networks, respectively. Tensile strength and Young modulus for PEO systems showed similar results up to 30 wt% of BS, whereas for PPO networks they decreased relentlessly at 20 wt% of BS. PEO composites showed an overall increase in the Shore D hardness testing. Water swelling experiment illustrated greater hydrophilicity of PEO compared to filled and unfilled PPO systems. The water absorption remains unaltered up to 20 wt% of BS, revealing a good interaction between both networks and filler. It was clearly illustrated the difference in the effect of hydrophilicity (PEO) and the hydrophobicity (PPO) in the epoxy composite results. A better compatibility and good correlation between mechanical and thermal properties were observed in 10 wt% of BS in both polyetheramine cured networks. Keywords-Rice husk silica, bio-silica reinforced polymers, bio based thermosets, aliphatic bio-epoxy composites, polymer composites.

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