writer：Chao Yang, Peng Liu,, Jinshan Guo, YunpuWang
keywords：Vermiculite，Self-assembled monolayer，Encapsulated structure
source：期刊
specific source：Synthetic Metals
Issue time：2011年

Conductive polypyrrole (PPy) was chemically grafted from the self-assembled monolayer (SAM) coated
on expanded vermiculite (VMT), resulting in PPy/VMT nanocomposites after VMT particles were surface
modi?ed. X-ray diffraction (XRD) analysis con?rmed that the main peaks of PPy/VMT nanocomposites
are similar to the SAM–VMT particles, which reveal that the crystal structure of SAM–VMT is well main-
tained after the coating process under polymerization conditions and exhibit semi-crystalline behavior.
Thermogravimetric analysis shows that the thermal stability of PPy/VMT nanocompositeswas enhanced
and these can be attributed to the retardation effect of amine-functionalized VMT as barriers for the
degradation of PPy. Themorphology of PPy/VMT nanocomposites showed the sheet structure and encap-
sulated morphology. The composites possess high electrical conductivity at room temperature, weakly
temperature dependence of the conductivity.