Lightweight glass/Fe3O4-polyaniline composite hollow spheres with conductive and magnetic properties

• Published in: Journal of materials science 2011-05, Vol.46 (9), p.2955-2962
• Main Authors: Wang, Jing, Xu, Huifang, Song, Jianwei, Zhang, Haijiao, Gao, Beiling, Huang, Yudong
• Format: Article
• Language: English
• Subjects: Aniline; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Conductivity; Crystallography and Scattering Methods; Glass; Glass substrates; Iron oxides; Lightweight; Magnetic measurement; Magnetic properties; Magnetism; Magnetization; Materials Science; Morphology; Nanoparticles; Polyanilines; Polymer Sciences; Polymerization; Solid Mechanics; Weight reduction
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-010-5171-3

Lightweight composite hollow spheres with conductive and magnetic properties were prepared by using Hollow Glass Spheres (HGS) as substrate. The morphology, composition, conductive, and magnetic properties of the resultant products were characterized by SEM, EDX, XRD, FTIR spectra, conductivity measurement, and vibrating-sample magnetometry. Polyaniline (PANI) were in situ polymerized on HGS with increasing ratios of PANI to HGS, resulting in the enhanced conductivity of HGS/PANI composites from 1.3 × 10 −2  S/cm to 4.4 × 10 −2  S/cm. Lightweight glass/Fe 3 O 4 -PANI composite hollow spheres (HGS/Fe 3 O 4 -PANI) with conductivity of 5.4 × 10 −3  S/cm and magnetization of 9.25 emu/g were prepared by deposition of Fe 3 O 4 nanoparticles onto HGS via electrostatic adsorption first, and then polymerization of aniline onto HGS/Fe 3 O 4 . The glass/PANI-Fe 3 O 4 composite hollow spheres (HGS/PANI-Fe 3 O 4 ) composed of Fe 3 O 4 as the outmost layer and PANI as the inner layer were prepared for comparison. The conductivity and magnetization of HGS/PANI-Fe 3 O 4 were 1.1 × 10 −4  S/cm and 2.61 emu/g, respectively.