Article

Nanoparticle induced piezoelectric, super toughened, radiation resistant, multi-functional nanohybrids.

School of Materials Science and Technology, Institute of Technology, Banaras Hindu University, Varanasi 221 005, India.
Nanoscale (impact factor: 5.91). 11/2011; 4(1):167-75. DOI:10.1039/c1nr11009h pp.167-75
Source: PubMed

ABSTRACT We have developed multifunctional nanohybrids of poly(vinylidene fluoride-co-chlorotrifluoroethylene) (CTFE) with a small percentage of surface modified inorganic layered silicate showing dramatic improvement in toughness, radiation resistant and piezoelectric properties vis-à-vis pristine polymer. Massive intercalation (d(001) 1.8 → 3.9 nm) of polymer inside the nanoclay galleries and unique crystallization behavior of the fluoropolymer on the surface of individual silicate layer has been reported. Toughness in the nanohybrid increases more than three orders of magnitude as compared to pure CTFE. High energy radiation (80 MeV Si(+7)) causes chain session, amorphization and creates olefinic bonds in the pure polymer while the nanohybrids are radiation resistant at a similar dose. Nanoclay induces the metastable piezoelectric β-phase in CTFE, suitable for sensor and actuator application. Molecular level changes after irradiation and controlled morphology for smart membrane have been confirmed by using spectroscopy, sol-gel technique, surface morphology studies and in situ residual gas analysis.

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Keywords

individual silicate layer
 
inorganic layered silicate
 
Massive intercalation
 
metastable piezoelectric β-phase
 
Molecular level changes
 
morphology
 
multifunctional nanohybrids
 
nanoclay galleries
 
nanohybrid increases
 
olefinic bonds
 
piezoelectric properties vis-à-vis pristine polymer
 
poly(vinylidene fluoride-co-chlorotrifluoroethylene)
 
radiation resistant
 
sensor
 
situ residual gas analysis
 
sol-gel technique
 
surface morphology studies
 
Toughness
 
unique crystallization behavior