Abstract: Fe3O4 nanoparticles with uniform size were dispersed in the sodium dodecyl benzenesulfonate (SDBS) micelles together with methyltrimethoxysilane (MTMOS). In the presence of hydrochloric acid nano-scale SiO2/Fe3O4 magnetic fluids were prepared by the hydrolysis and polycondensation process of MTMOS on the surface of Fe3O4 nanoparticles. Conductive textiles based on organic-inorganic composite films with polyaniline and nano-magnetic particles were prepared by two-step method, which had lower resistivity compared with conductive textiles based on polyaniline single-layer film, and the resistivity decreased with the addition amount of nano-magnetic particles.

Key words: nano-scale SiO₂∕Fe₃O₄ magnetic fluid , polyaniline single-layer film , organic-inorganic composite film , conductive fabric