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Conductive shape‐memory polyurethane/multiwall carbon nanotube nanocomposite aerogels
Author(s) -
Teymouri Mohsen,
Kokabi Mehrdad,
Alamdarnejad Ghazaleh
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.48602
Subject(s) - materials science , aerogel , nanocomposite , dynamic mechanical analysis , carbon nanotube , fourier transform infrared spectroscopy , differential scanning calorimetry , composite material , polyurethane , percolation threshold , nanotube , scanning electron microscope , chemical engineering , polymer , electrical resistivity and conductivity , physics , electrical engineering , engineering , thermodynamics
Smart nanocomposite aerogels have promising applications. In this work, different percentages of multiwall carbon nanotube (MWCNT) added into synthesized polyurethane (PU) gel in the molten state, using a two‐roll mill. By soaking the PU/MWCNT nanocomposite gel into the water, PU/MWCNT hydrogels containing more than 90 wt % of water were prepared. The obtained hydrogels were freeze‐dried to produce aerogel counterparts. The aerogels were fully characterized using mercury porosimetry, differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy (FE‐SEM). The electrical percolation threshold of conductive aerogel system was measured. The shape‐memory behavior of PU/MWCNT nanocomposite aerogels was evaluated by dynamic mechanical thermal analysis (DMTA). The results of the DMTA showed that by adding 2.75 wt % of MWCNT, the recovery ratio and storage modulus of the PU/MWCNT nanocomposite aerogel increased 42 and 180%, respectively. The electrical conductivity of the system also increased three orders of magnitude at the percolation threshold. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48602.