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- W2039177536 abstract "Multiwalled carbon nanotubes (MWCNTs) were used as doping material for three-dimensional chitosan scaffolds to develop a highly conductive, porous, and biocompatible composite material. The porous and interconnected structures were formed by the process of thermally induced phase separation followed by freeze-drying applied to an aqueous solution of 1 wt % chitosan acetic acid. The porosity was characterized to be 97% by both mercury intrusion porosimetry measurements and SEM image analysis. When MWCNTs were used as a filler to introduce conductive pathways throughout the chitosan skeleton, the solubilizing hydrophobic and hydrophilic properties of chitosan established stable polymer/MWCNT solutions that yielded a homogeneous distribution of nanotubes throughout the final composite matrix. A percolation theory threshold of ∼2.5 wt % MWCNTs was determined by measurement of the conductivity as a function of chitosan/MWCNT ratios. The powder resistivity of completely compressed scaffolds also was measured and was found to be similar for all MWCNT concentrations (0.7−0.15 Ω cm powder resistivity for MWCNTs of 0.8−5 wt %) and almost five times lower than the 20 kΩ cm value found for pure chitosan scaffolds." @default.
- W2039177536 created "2016-06-24" @default.
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- W2039177536 date "2008-06-03" @default.
- W2039177536 modified "2023-10-10" @default.
- W2039177536 title "Conductive Macroporous Composite Chitosan−Carbon Nanotube Scaffolds" @default.
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- W2039177536 doi "https://doi.org/10.1021/la8005597" @default.
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