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Polypyrrole/vermiculite nanocomposites via self-assembling and in situ chemical oxidative polymerization
作者:Chao Yang, Peng Liu,, Jinshan Guo, YunpuWang
关键字:Vermiculite,Self-assembled monolayer,Encapsulated structure
论文来源:期刊
具体来源:Synthetic Metals
发表时间: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.