Preparation and characterization of flexible polyurethane foam nanocomposites reinforced by magnetic core-shell Fe3O4@APTS nanoparticles |
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Authors: | Mir Mohammad Alavi Nikje Sahebeh Tamaddoni Moghaddam Maede Noruzian Mohammad Amin Farahmand Nejad Keyvan Shabani Moslem Haghshenas Saeed Shakhesi |
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Institution: | 1. Department of Chemistry, Faculty of Science, Imam Khomeini International University, Qazvin, Iran, P.O. Box: 288 2. Department of Chemistry & Polymer Laboratories, Engineering Research Institute, Tehran, Iran 3. Department of Nanotechnology, Engineering Research Institute, Tehran, Iran
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Abstract: | Novel magnetic polyurethane flexible foam nanocomposites were synthesized by incorporation of aminopropyltriethoxysilane (APTS) functionalized magnetite nanoparticles (MNPs) via one-shot method. The functionalized MNPs (Fe3O4@APTS) were synthesized by co-precipitation of the Fe2+ and Fe3+ with NH4OH and further functionalization with APTS onto the surface of MNPs by sol–gel method. The magnetic core-shell NPs were used up to 3.0 % in the foam formulation and the magnetic nanocomposites prepared successfully. The results of thermogravimetric analysis (TGA) showed an increasing in thermal stability of polyurethane nanocomposite foam at initial, 5 and 10 %, and maximum thermal decomposition temperatures by incorporation of Fe3O4@APTS. In addition SEM images revealed the uniformity of the foam structures and decreasing in pore sizes. Furthermore, VSM result showed super paramagnetic behavior for Fe3O4@APTS-PU nanocomposites. |
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