Conductive paper from lignocellulose wood microfibers coated with a nanocomposite of carbon nanotubes and conductive polymers.
Composite nanocoating of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT-PSS) and aqueous dispersion of carbon nanotubes (CNT-PSS) on lignocellulose wood microfibers has been developed to make conductive microfibers and paper sheets. To construct the multilayers on wood microfibers, cationic poly(ethyleneimine) (PEI) has been used in alternate deposition with anionic conductive PEDOT-PSS and solubilized CNT-PSS. Using a Keithley microprobe measurement system, current-voltage measurements have been carried out on single composite microfibers after deposition of each layer to optimize the electrical properties of the coated microfibers. The conductivity of the resultant wood microfibers was in the range of 10(-2)-2 S cm(-1) depending on the architecture of the coated layer. Further, the conductivity of the coated wood microfibers increased up to 20 S cm(-1) by sandwiching multilayers of conductive co-polymer PEDOT-PSS with CNT-PSS through a polycation (PEI) interlayer. Moreover, paper hand sheets were manufactured from these coated wood microfibers with conductivity ranging from 1 to 20 S cm(-1). A paper composite structure consisting of conductive/dielectric/conductive layers that acts as a capacitor has also been fabricated and is reported.
Institute for Micromanufacturing, Louisiana Tech University, Ruston, LA 71272, USA. agarwal@iupui.edu
Mangilal
M
Agarwal
Qi
Q
Xing
Bong Sup
BS
Shim
Nicholas
N
Kotov
Kody
K
Varahramyan
Yuri
Y
Lvov
D003460:Crystallization / Q000379:methods*; D004553:Electric Conductivity; D008031:Lignin / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008420:Manufactured Materials; D008422:Materials Testing; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D010209:Paper; D010316:Particle Size; D011137:Polystyrenes / Q000737:chemistry*; D013499:Surface Properties; D013876:Thiophenes / Q000737:chemistry*; D014934:Wood / Q000737:chemistry*
D046911:Macromolecular Substances; D037742:Nanotubes, Carbon; D011137:Polystyrenes; D013876:Thiophenes; C533756:poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate); C036909:lignocellulose; D008031:Lignin