کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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820072 | 1469506 | 2015 | 7 صفحه PDF | دانلود رایگان |
Novel superparamagnetic nanocomposites based on covalently linked waterborne polyurethane (WPU) and Ni0.3Zn0.7Fe2O4 ferrite nanospheres (NZFO) were successfully synthesized using an in situ polymerization method. The Ni0.3Zn0.7Fe2O4 nanoparticles prepared by a typical solvothermal method were modified with 3-(triethoxysilyl) propyl isocyanate (IPTS) to improve the compatibility with monomers. The functionalized NZFO nanoparticles (NZFO-IPTS) served as effective cross-link points and reacted with the WPU matrix, forming chemical bonds. It was found that the NZFO-IPTS greatly improved the dispersibility of NZFO nanoparticles in the WPU matrix, and the introduction of NZFO-IPTS enhanced the thermal behavior and mechanical properties of the WPU polymer. What's more, the WPU/NZFO nanocomposites presented superior magnetic properties and a maximum saturation magnetization (Ms) of 16.58 emu/cm3 was observed, thus illustrating the potential applications of the generated materials in microwave-absorbing fields.
Journal: Composites Science and Technology - Volume 119, 23 November 2015, Pages 108–114