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Title: Synthesis of PAN nanoparticles via nonconventional microemulsion technique using Co(II)/EDTA in situ complex
Authors: Biswal, Trinath
Sahoo, Prafulla K
Keywords: Microemulsion;CoCl₂/EDTA in situ complex;Nano particle;Kinetics;TEM
Issue Date: Mar-2007
Publisher: CSIR
IPC Code: C08F2/00, C08J3/00
Abstract: Synthesis of polyacrylonitrile nanoparticles was carried out under the catalytic effect of in situ developed Co(II)/EDTA complex with ammonium persulphate as initiator, in the absence of added emulsifier. The microemulsion polymerization was studied at varying concentrations of initiator, monomer, complex and solvent over a temperature range of 30-70ºC. The overall activation energy (Ea, 49.79 kJ/mol), energy of dissociation of initiator (Ed, 82.68 kJ/mol), number of micelles (0.163 x 1018) and the viscosity average molecular weight of the polymer were computed. The distribution of particle sizes was determined by transmission electron microscopy (TEM). It was found that the oil-in-water polymerization was stabilized by the presence of the CoCl₂/EDTA in situ complex reducing the particle size into nano order. The average diameters of PAN nano particles, obtained by TEM, were in the range of 50-150 nm at maximum conversion. The experimental particle size was mainly dependent on the concentration of complex and temperature.
Page(s): 119-125
ISSN: 0971–457X
Appears in Collections:IJCT Vol.14(2) [March 2007]

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