Electromagnetic nanocomposite of bacterial cellulose using magnetite nanoclusters and polyaniline

► We used a simultaneous incorporating method to introduce magnetic nanoparticles effectively during biosynthesis of BC. ► The non-ionic amphiphilic comb-like polymer was adopted to form a stable dispersion of nanoclusters effectively. ► An electrically conducting magnetic BC membrane was successfully prepared. ► The process can be applied to manufacture other functional biomaterials with the controlled dispersion of nanoclusters.