| Icing phenomenon has brought many troubles and even disasters to people,such as airplane icing.Therefore,the development of anti-icing technology is extremely important.Traditional anti-icing strategies have great shortcomings,such as complex devices,high energy consumption and environmental pollution,so it is of great significance to develop an efficient anti-icing strategy without energy consumption.Recently,some people put forward passive anti-icing strategies to overcome the challenges faced by traditional methods,including: superhydrophobic surfaces and slippery liquid-infused porous surfaces.Although these efforts have promoted the development of anti-icing surfaces from a different perspective,there are still various drawbacks and challenges.The high cost,manufacturing complexity and poor durability of these passive anti-icing surfaces greatly limit their practical application.This subject is dedicated to the preparation of superhydrophobic surfaces and the basic research of multi-functional anti-icing.The main tasks were as follows:1.The development history,related theories,preparation methods and application prospects of superhydrophobic surface in different fields are introduced.The advantages and disadvantages of superhydrophobic anti-icing surface and other passive anti-icing methods are analyzed,and the anti-icing theory of superhydrophobic surface is briefly introduced.2.A femtosecond laser was used to construct an asymmetric pore array on the aluminum surface to realize rapid condensation self-removal.Study of plants and animals in nature,select a specific bionic object,built by femtosecond laser in aluminum surface bulging moth eye array,different spacing,different laser processing rate is studied on the properties of the surface morphology,wettability,sunlight,analyze and optimize the structure to achieve the best effect,was studied with homemade frozen stage its ability and in the light of ice melting capacity,also explores the bionic aluminium durability and stability in the practical application and self-cleaning capacity.3.The wettability and surface morphology of various plants were studied.The porous cone microstructure was fabricated on the nickel surface by ethanol-assisted femtosecond laser.The automatic switch between high adhesion and low adhesion of superhydrophobic was realized by surface modification,and the application prospect of wettability and optical properties in different fields was explored.In view of the shortcomings of traditional anti-icing and existing passive anti-icing,a bionic strategy combining passive delayed icing with active photo-thermal de-icing is proposed.Moth-eye-inspired texturing surfaces could delay the freezing time by 5 times than blank one while the photothermal ability increases its surface temperature by 53?C under sun irradiation.Additionally,the self-cleaning ability of the prepared surface enhances the antiicing efficiency by removing absorbed contaminants affecting the photothermal effect adversely.The work provides new insights into the design of enhanced anti-icing surface on the engineering materials with an advanced laser microfabrication. |
