Divya Jose started her research pursuit in synthesis of conducting polymers under the mentorship of Prof. Rani Joseph in Department of Polymer Science and Rubber Technology in early 2012. She joined Bharath Matha College as Asst. Professor in chemistryin 2013 and continued her research as a part-time scholar of the Department. Meanwhile she has supervised a UGC minor project on dielectric studies of polypyrrole-ZnO nanocomposites. Later in 2017, she joined Honey John’s research group under Faculty Development Programme during which she has synthesized conducting polymers and their hybrids with polydimethylsiloxane composites for energy harvesting applications such as triboelectric nanogenerators. She has three Indian patent to her credit based on the ongoing work.
A facile and ecofriendly method for the synthesis of PDMS composites for triboelectric nanogeneration (TENG) applications is developed which can harvest electrical energy from mechanical energy as desired.
Divya Jose, Rani Joseph, Honey John, Synthesis, Characterisation, morphological and electrical studies of polypyrrole nanostructures, AIP Conference Proceedings, 2082 (2019) 030011: 1-5.
Conducting polypyrrole was synthesized by three independent methods such as inverse micro emulsion polymerization (MIP), nano polymerization (Nano PPy) and bulk polymerization (Bulk PPy) and the samples were characterized by FESEM, XRD, FTIR and UV-visible Spectroscopy. DC conductivity studies of the samples were investigated by Keithley two probe method and it was found that polypyrrole by MIP method shows highest dc conductivity value as 5.3672x10-7Smˉ1 while Nano PPy and Bulk PPy as 1.8911x10-7and 0.8564x10-7Smˉ1 respectively. In UV-visible spectroscopy, polypyrrole showed absorption peak at 380nm corresponding to π to π* excitation transition which confirms conjugated polypyrrole structure in all samples with absorbance 0.2809, 0.0861 and 0.6142 for MIP PPy, Nano PPy and bulk PPy respectively. FTIR spectra show maximum absorbance for Bulk PPy. Peak at 1457 cm-1, 1557 cm-1 (C=C stretching of pyrrole rings), (N-H bending vibrations), 1376 cm-1 and 1300 cm-1(stretching peaks of C=N and C-N bonds) confirms polypyrrole formation1. FESEM images of polypyrrole shows spherical morphology for MIP PPy and Bulk PPy while nano PPy possess globular morphology with agglomeration of particles; with particle size in nano range. The peaks obtained for all polypyrrole samples were broad in X-ray diffraction studies confirming its amorphous nature. It also indicates poor crystallinity and short range arrangement of PPy chains.