1. Preparation and vapor-sensitive properties of hydroxyl-terminated polybutadiene polyurethane conductive polymer nanocomposites based on polyaniline-coated multiwalled carbon nanotubes
- Author
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Ya-Shao Chen, Ya-Qi Ma, Feng Xu, Xue Tian, Yan-Ling Luo, and Sen Zhang
- Subjects
Materials science ,Bioengineering ,02 engineering and technology ,Carbon nanotube ,010402 general chemistry ,01 natural sciences ,law.invention ,chemistry.chemical_compound ,Polybutadiene ,Hydroxyl-terminated polybutadiene ,law ,Polyaniline ,General Materials Science ,Electrical and Electronic Engineering ,Fourier transform infrared spectroscopy ,Conductive polymer ,Nanocomposite ,Mechanical Engineering ,General Chemistry ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,chemistry ,Chemical engineering ,Polymerization ,Mechanics of Materials ,0210 nano-technology - Abstract
Polyaniline-coated multi-walled carbon nanotube (MWCNT) conductive polymer precursors (MWCNTs@PANI) were prepared by an in situ microemulsion oxidation polymerization of aniline in the case of MWCNTs, and then hydroxyl-terminated polybutadiene polyurethane conductive polymer nanocomposites based on MWCNTs@PANI (MWCNTs@PANI/HTPB PUs) were prepared through an in situ stepwise polymerization of HTPB and diisocyanates. The chemical structure was characterized by Fourier transform infrared spectroscopy (FTIR), Raman, x-ray diffraction, x-ray photoelectron spectroscopy and thermogravimetric analysis. The morphologies and dispersion behavior were examined by scanning electron microscopy, transmission electron microscopy and UV-vis transmittance. The MWCNTs@PANI/HTPB PUs nanocomposites were fabricated into film sensors for detection of volatile organic compound vapors, and displayed an evident response to trichloromethane vapor (CHCl3). The effect of MWCNTs on the conductivity and the responsivity to trichloromethane of conductive polymer nanocomposite films were studied, finding that the conductive composite films have fast and strong response, good repeatability and recoverability, and long-term stability. Consequently, they can be potentially applied for supervision and detection of interior and outdoor environmental gases or vapors.
- Published
- 2020