Fabrication, superhydrophobicity, and microwave absorbing properties of the magnetic γ-Fe2O3/bamboo composites

Magnetic gamma-Fe2O3 nanoparticles were successfully deposited on the surface of the bamboo via a coprecipitation process at room temperature. Spherical-like magnetic gamma-Fe2O3 nanoparticles with a diameter of about 17 nm displayed well superparamagnetic behavior and were chemically bonded to the bamboo surface through the combination of hydrogen groups. With further modification by 1H,1H,2H,2H-perfluoroclecyltri ethoxysilane (FAS-17), magnetic gamma-Fe2O3/bamboo composites (MBCs) expressed superhydrophobic performances to not only water but also common liquids like coffee, milk, ink, tea, and coke. When immersed into the corrosive solutions including strong acid (pH 1), heavy alkaline (pH 14), and salt with high concentration (5 M) for 24 h, superhydrophobic magnetic gamma-Fe2O3/bamboo composites (SMBC) still remained magnetism as well as superhydrophobicity. Also, under harsh conditions like boiled at 100 degrees C for 4 h, frozen at 40 degrees C for 24 h, SMBCs were kept a robust magnetism and superhydrophobicity. Additionally, SMBC was a typical ferromagnet and exhibited some microwave absorbabilities. (C) 2015 Elsevier Ltd. All rights ed.