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Title: Enhancement of micro structural properties of PVA doped with MWCNT’s and metal oxide nanocomposites films

WO{sub 3} nanoparticles were prepared by using precipitation method and the multiwall Carbon nanotubes (MWCNT’s) were functionalized to make Carboxylated MWCNTs. Further, prepared WO{sub 3} and carboxylated MWCNT were doped into PVA matrix by coagulation technique and PVA nanocomposites were prepared by simple solvent casting technique. The films were characterized by XRD, FTIR spectroscopy and AFM. FTIR spectroscopy reveals the intensity of absorption of radiation at 3624.55 cm{sup −1} corresponds to the OH group of PVA. It changes in accordance with dopant concentration causing inter/intra molecular hydrogen bonding between the dopants and PVA back bone which leads to the complex formation. XRD data explores the crystalline nature of the film. It is found that for doping concentration x= 7.5 wt% the percentage crystallinity and crystallite size increases whereas micro structural strain and dislocation density decreases. An atomic force microscopy topographic analysis proves that the doped particles have an average size less than 15 nm, as confirmed by XRD data. It was found that roughness of the sample varies with dopant concentration causing variation in crystallinity.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Dept of Physics, Srinivas School of Engineering, Mukka, Mangalore, Karnataka (India)
  2. Dept of Physics, St. Joseph Engineering College, Vamanjoor, Mangalore, Karnataka (India)
  3. Dept of Chemistry, Srinivas School of Engineering, Mukka, Mangalore, Karnataka (India)
  4. Dept of Mechanical Engineering, Srinivas School of Engineering, Mangalore, Karnataka (India)
Publication Date:
OSTI Identifier:
22490594
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1665; Journal Issue: 1; Conference: 59. DAE solid state physics symposium 2014, Tamilnadu (India), 16-20 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; ABSORPTION SPECTROSCOPY; ATOMIC FORCE MICROSCOPY; CARBON NANOTUBES; CONCENTRATION RATIO; DISLOCATIONS; DOPED MATERIALS; FILMS; FOURIER TRANSFORMATION; HYDROGEN; INFRARED SPECTRA; NANOCOMPOSITES; NANOPARTICLES; PRECIPITATION; PVA; ROUGHNESS; TUNGSTATES; TUNGSTEN OXIDES; X-RAY DIFFRACTION