Fabrication, characterization and properties of waterborne polyurethane/3-aminopropyltriethoxysilane/multiwalled carbon nanotube nanocomposites via copolycondensation of hydroxyls
作者： Xinjian Fan , Zhiying Zhang , Shujing Yue , Changfa Xiao
DOI: 10.1007/S00289-016-1859-0
关键词: Silanol 、 Composite material 、 Surface modification 、 Nanocomposite 、 Thermal analysis 、 Thermogravimetric analysis 、 Materials science 、 Fourier transform infrared spectroscopy 、 Nanotube 、 Thermal stability
摘要: A series of novel covalently linked waterborne polyurethane/3-aminopropyltriethoxysilane/multiwalled carbon nanotube (WPU/Si/MWCNT) nanocomposites were synthesized through an optimized copolycondensation hydroxyls. multiwalled (MWCNT) as the inorganic filler was pretreated with a successive two-step modification route for its surface function hydroxyl groups. 3-Aminopropyltriethoxysilane (APTES) embedded into backbone WPU molecules, hydrolysis which generates silanol groups in polyurethane (PU) matrix at emulsification stage. Meanwhile, could condense on modified MWCNT, generating covalent bond between MWCNT and APTES-embedded PU matrix. The change composition during process characterized by using both Fourier transform infrared spectroscopy X-ray photoelectron spectroscopy. transmission electron microscope (TEM) utilized to image morphology MWCNT. field emulsion scanning microscopy (SEM) micrographs particle size distribution curves showed that well dispersed thermal stability, water resistance, mechanical properties dynamic behaviors WPU/Si/MWCNT films thermogravimetric analysis, swelling test, tensile respectively. These results revealed compared pristine WPU, system APTES possesses outstanding high stability excellent properties.
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