Magnetic Particles Based Multifunctional Surface For Anti-icing And Thermal Responsive De-icing Performance

Ice adhesion and accretion on the facilities inconvenience our daily life and even spawn great economic losses. Thus, it is of important to develop anti-icing technology. Recent researches have provided new insights into the icing phenomenon and some promising bio-inspired anti-icing strategies, such as superhydrophobic surface (SHS) inspired by lotus effect. Several types of SHS and SLIPS surfaces with relatively poor performance were reported under repeated icing/deicing cycles, because of their poor abrasive resistance and stability. Magnetic nanomaterials were also reported to be used as heat mediators because of their intrinsic ability to absorb energy from light and be heated under external AC magnetic fields. Magnetic Fe3O4 nanoparticles incorporated into the surface may impart it with thermal deicing property.In this article, magnetic nanoparticles (MNPs) were introduced as the heat mediators in a superhydrophobic coating for anti-icing and deicing performance The fluorinated copolymer tethered epoxy groups were synthesized and mixed with amino modified Fe3O4 nanoparticles, and then crosslinked with diethylenetriamine to obtain novel multifunctional magnetic hybrid coatings. The compositions, morphologies, surface microstructure and wettability performance of the hybrid coatings were systematically investigated by the scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and water contact angle (WCA) measurements The target coatings exhibited excellent superhydrophobicity and wetting stability driven by the formation of micro-nano hierarchical surface roughness covered with fluorinated groups. The low temperature (15 ℃, RH:50±5%) WCA showed that the superhydrophobic surface could delay the freezing time from 50 s to 2878 s. And the ice adhesion strength was significantly lower than that of a pure copolymer coating. More importantly, the outstanding photothermy and magnetothermal effects of the magnetic particles endowed the coatings with long time icing delay and thermal deicing properties.Furthermore, the slippery liquids infused porous surface was synthesized by P(PEGMA-GMA) copolymer and MNP@NH2- Compositions, morphologies, surface microstructure and wettability performance of the hybrid coatings were systematically investigated by FT-IR, SEM, AFM, and WCA measurements. The low temperature (-15 ℃, RH:80±5%) anti-frosting measurement showed that the surface could delay the freezing time to 2700s. And the ice adhesion strength was significantly low, down to 0.01N. More importantly, the freeze temperature was lowered to-35.8 ℃, confirmed by DSC measurement. The fabricated multifunctional bio-inspired surfaces with excellent anti-icing and active deicing properties hold good promise for practical applications.