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<p>Here, the report on a facile synthesis of hemiamine thermoset containing iron oxide nanodomains by polycondensation of formaldehyde, polyetheramine (Jeffamine) D-400 and (3-aminopropyl)triethoxysilane (APTES) functionalized iron oxide nanoparticles is accomplished. The synthesized material was molded to required shapes by using high pressure mold press machine. Hemiamine thermosets were prepared by varying the percentage of APTES functionalized iron oxide nanoparticles as 5%, 10%, 15%, 20% and 25%. The characterizations of hemiamine thermoset were carried out by Thermogravimetric analysis (TGA), Differential Scanning Calorimetry (DSC), Dynamic Light Scattering (DLS) and Transmission Electron Microscopy (TEM). The augmentation of hemiamine with Fe<sub>2</sub>O<sub>3</sub>-NH<sub>2</sub> improved the thermomechanical characteristics in terms of glass transition temperatures (T<sub>g</sub>,s) and tensile mechanical strength. The Young’s modulus and breaking strength was measured as 1.3 GPa and 72.5&#xa0;MPa of the hemiamine thermoset containing 25% Fe<sub>2</sub>O<sub>3</sub>-NH<sub>2</sub> nanoparticles. The shape memory and self-healing properties were investigated. The impregnation of Fe<sub>2</sub>O<sub>3</sub>-NH<sub>2</sub> in hemiaminal dynamic covalent networks (HDCNs) was responsible of shape memory and self-healing properties due to improved thermal conductivity, reinforcement effect and interfacial interactions.</p>

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Facile synthesis of tunable and processable shape-memory hemiamine thermoset by catalyst-free polycondensation

  • 期刊论文

  • 发表日期：

    2025年12月12日

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  • Mohsin Raza,
  • Muhammad Imran Din,
  • Zaib Hussain

摘要

Here, the report on a facile synthesis of hemiamine thermoset containing iron oxide nanodomains by polycondensation of formaldehyde, polyetheramine (Jeffamine) D-400 and (3-aminopropyl)triethoxysilane (APTES) functionalized iron oxide nanoparticles is accomplished. The synthesized material was molded to required shapes by using high pressure mold press machine. Hemiamine thermosets were prepared by varying the percentage of APTES functionalized iron oxide nanoparticles as 5%, 10%, 15%, 20% and 25%. The characterizations of hemiamine thermoset were carried out by Thermogravimetric analysis (TGA), Differential Scanning Calorimetry (DSC), Dynamic Light Scattering (DLS) and Transmission Electron Microscopy (TEM). The augmentation of hemiamine with Fe2O3-NH2 improved the thermomechanical characteristics in terms of glass transition temperatures (Tg,s) and tensile mechanical strength. The Young’s modulus and breaking strength was measured as 1.3 GPa and 72.5 MPa of the hemiamine thermoset containing 25% Fe2O3-NH2 nanoparticles. The shape memory and self-healing properties were investigated. The impregnation of Fe2O3-NH2 in hemiaminal dynamic covalent networks (HDCNs) was responsible of shape memory and self-healing properties due to improved thermal conductivity, reinforcement effect and interfacial interactions.