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Fluorine modification on titanium dioxide particles: Improving the anti-icing performance through a very hydrophobic surface
摘要： In this study, fluorine modification was successfully conducted on titanium dioxide (TiO2) to enhance the anti-icing property through fabricating a very hydrophobic surface. TiO2 was firstly modified with 3-methacryloxypropyl-trimethoxysilane (MPS) to introduce C=C bonds. Then, dodecafluoroheptyl methacrylate (DFHMA) monomers were successfully grafted on the TiO2 particles via C=C bonds introduced by MPS. Herein, azobisisobutyronitrile (AIBN) was used as initiator to initiate the reaction. The chemical components of the TiO2 particles were investigated by X-ray photoelectron spectroscopy (XPS). XPS analysis of fluorine-modified TiO2 revealed that the fluorine content reached a peak value of 7.3%, while the water contact angle enhanced to a maximum value of 146o. This water contact angle value of 146o was dramatically increased by 131o in comparison with unmodified TiO2, indicating a very hydrophobic surface. The crystallization temperature of a water droplet on the corresponding fluorine-modified TiO2 decreased to -19.4 oC (10.3 oC decrease in comparison with that of a water droplet on unmodified TiO2). Also, the freezing delay time on the fluorine-modified TiO2 is more than 25 min under the testing temperature of -10 oC, exhibiting excellent anti-icing property.
关键词： Azobisisobutyronitrile,Fluorine modification,Anti-icing property,Dodecafluoroheptyl methacrylate,Titanium dioxide
更新于2025-09-23 15:23:52
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FDTS‐Modified SiO <sub/>2</sub> /rGO Wrinkled Films with a Micro‐Nanoscale Hierarchical Structure and Anti‐Icing/Deicing Properties under Condensation Condition
摘要： Icing accretion on the surface of an aircraft not only increases the weight but also causes changes in the surface shape, so there is an urgent need for anti-icing/deicing without shutdown. Here, a graphene-based film with light weight, super-hydrophobicity, high electric heat, and durability, which has both anti-icing properties and electrothermal deicing capability, is proposed. The film is prepared with 1H,1H,2H,2H-perfluorodecyltrichlorosilane (FDTS)-modified SiO2/rGO wrinkles, and it has a micro-nanoscale hierarchical structure. Moreover, the superhydrophobic properties of the film can be controlled by adjusting the wrinkle size. Because of its good water repellency, the film can prevent and delay the freezing of water droplets at low temperatures. At ?10 °C, compared to a smooth rGO film, the icing time of 10 μL supercooled water droplet on the micro-nanoscale hierarchical structured film can be delayed by ≈8.3 times, and the ice adhension decreases greatly. In addition, the film exhibits high-efficiency electrothermal properties. At ?10 °C, under a low voltage of 15 V, the film can be heated rapidly to achieve rapid deicing and defrosting. The graphene-based micro-nanoscale hierarchical structure shows great potential in the field of sky anti-icing and real-time deicing.
关键词： anti-icing,defrosting,electrothermal,deicing,superhydrophobic
更新于2025-09-11 14:15:04