Tough and stretchable Fe3O4/MoS2/PAni composite hydrogels with conductive and magnetic properties

Novel composite hydrogels with conductive and magnetic properties are prepared by introducing ternary composites into a double-network hydrogel. The ternary composites are comprised of Fe3O4, MoS2 and PAni. Fe3O4 possessing high surface area could be served as a carrier. And MoS2 with a special sandwich structure will provide enough interlayer spaces to combine with PAni via electrostatic attraction. The ternary composites are further introduced into a double-network hydrogel. The resultant composite hydrogels have maximum saturation magnetization of 1.28 emu·g−1 and conductivity of 2.052 × 10−3 S cm−1, respectively. In addition, the thermo-stability and the mechanical property of the composite hydrogels are improved by the incorporation of ternary composites, and the tensile strength of the composite hydrogels is about 140 kPa with a good stretchability (≈170%). Therefore, these flexible and robust composite hydrogels with conductive and magnetic properties have good prospect in the fields of the electronic skin, drug release, electromagnetic interference shielding and wave-absorbing materials.