Citation: . FERROFLUID CONTAINING SOLUBLE CONDUCTIVE POLYANILINE AND ITS FREESTANDING FILMS*[J]. Chinese Journal of Polymer Science, ;2003, 21(3): 271-276. shu

FERROFLUID CONTAINING SOLUBLE CONDUCTIVE POLYANILINE AND ITS FREESTANDING FILMS*

Received Date: 4 March 2002
Revised Date: 1 April 2002

Ferrofluid containing highly conductive polyaniline (PANI) was prepared, in which soluble PANI solutions dopedwith 10-camphorsulfonic acid (CSA) and dodecyl benzenesulfonic acid (DBSA) were used as the basic solution and Fe3O4nanoparticles (d = 10 nm) as the magnetic material. Moreover, the freestanding films of the resulting ferrofluid can beobtained by an evaporation method. The electrical and magnetic properties of the ferrofluid or its films can be adjusted through changing the content of PANI and Fe3O4.High saturated magnetization (≈ 30 emu/g) and high conductivity (≈250 S/cm) of thecomposite films can be achieved when the composite film contains 26.6 wt% of Fe3O4.In particular,it was found that the composite films exhibit a super-paramagnetic behavior(Hc=0)attributed to the size of Fe3O4 particles on the nanometer scale.
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