Series of polymethymethacrylat (PMMA) composites with cobalt nano- particles in presence of dodecyl-benzene-sulphonic acid(DBSA) and without DBSA were synthesized by ultra sonication method. UV-Vis and FTIR spectra were used to characterize the synthesis of composites. The electrical conductivity measurement at 100 kHz frequency was made by using LCR meter. The conductivity measurements of composite showed a characteristics trend as function of Co contents for both types of composite. Initially upon loading of filler in composite, the conductivity of system rises slowly followed by sudden increase in conductivity due to formation of network of filler particles. Afterwards, on increasing the fraction of Co, the conductivity of composites falls. It is assumed that at this stage network of filler particles, responsible for appreciable conductance, was broken down because of re-aggelomeration. Comparative study of two series showed that PMMA-Co-DBSA were relatively more electrically conductive than the PMMA-Co- without DBSA. The conductance measurement showed that maximum conductance was achieved at 3% loading of filler in PMMA-Co-DBSA system while 1.4% of loading for PMMA-Co composites. The system containing DBSA has the advantage of uniform dispersion and hence, less agglomeration of filler particles.

Surfactant incorporated Co nano particles polymer composites

254th National Meeting (2017)

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