Council of Scientific and Industrial Research

Rajendra Prasad Pant

Ravinder Kumar Kotnala

Sundeep Kumar Dhawan

Kuldeep Singh

Sonia

Komal Jain

Nikhil Sobti

Anil Ohlan

Parveen Saini

Beena Gupta

Kishan Hari

Ajay Shankar

Mahesh Chand

Prafulla Chandra Kothari

A water based double surfacted ferrofluid having magnetite nanoparticles (2-18 nm) coated with primary and secondary surfactants is synthesized. On the other hand, an aqueous dispersion of functionalized MWCNT (diameter=14-18 &#x3bc;m, length=1.6-2.5 &#x3bc;m) is prepared by acid treatment. A hybrid solutions in different v/v ratios yielded stable dispersions having both nanoparticles and nanotubes in itself behave as one system. The synthesized hybrid fluid show magnetic response and self-sustained homogeneity of in presence of magnetic field. In addition, the hybrid fluids exhibits a long term sedimentation and magnetic stability which enables one to use them for various applications like MRI, EMI shielding, energy conversion etc.

Ferrofluid-MWCNT hybrid nanocomposite in liquid state

The present invention provides a conducting copolymer ferromagnetic composite. Particularly, the present invention relates to a conducting copolymer of aniline and ethylene-dioxy thiophene containing ferrite particles. The present invention also provides insitu polymerization of aniline and ethylene-dioxy thiophene in the presence of ferrite particles and suitable surfactant medium. This conducting copolymer ferromagnetic composite can be used for the dissipation of electrostatic charge, for the shielding of electromagnetic interference and as absorbing of electromagnetic waves in the microwave region.

Conducting copolymer ferromagnetic composite and a process for the preparation thereof

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Rajendra Prasad Pant