Combined Approach of Compression Molding and Magnetic Attraction to Micropatterning of Magnetic Polydimethylsiloxane Composite Surfaces with Excellent Anti-Icing/Deicing Performance
Combined Approach of Compression Molding and Magnetic Attraction to Micropatterning of Magnetic Polydimethylsiloxane Composite Surfaces with Excellent Anti-Icing/Deicing Performance
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DOI：
10.1021/acsami.1c15428
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发表时间：
2021-09-29
影响因子：
9.5
通讯作者：
Lei, Caihong
中科院分区：
文献类型：
--
作者：
Chen, Anfu;Wang, Qiankun;Lei, Caihong
复合绝缘子表面覆冰和污秽物的积累会造成高能耗，甚至对电力系统造成重大危害。本文采用表面微图案化和材料复合的方法对聚二甲基硅氧烷（PDMS）硅橡胶进行了表面改性。采用高度交联的聚（环三磷腈-co-4，4 '-磺酰基联苯酚）（PZS）直接包覆四氧化三铁（Fe 3 O 4）纳米粒子。将碳纳米管（CNTs）负载到核壳结构Fe3O4@PZS微球上，得到CNTs/Fe3O4@PZS光热磁性填料。采用模压成型和磁吸引相结合的方法制备了具有微米级截锥形貌的PDMS/CNTs/Fe3O4@PZS表面。1H，1H，2 H，2 H-全氟癸基三氯硅烷涂覆的模板和磁场可以将微结构的高度增加到接近76 μ m，并将微结构PDMS/CNT/Fe 3 O 4@PZS表面的接触角保持在高水平（接近152度）。与平整的PDMS表面相比，微米级截锥使PDMS/CNTs/Fe3O4@PZS表面的冻结时间从4.5 min延长到11.5 min，并使冰的粘附强度从25 kPa降低到17 kPa。用磁吸引模塑的PDMS/CNT/Fe3O4@PZS表面的温度随时间和内部磁性填料线性增加，并在10 s内达到280 ℃。温度上升的效率提高了约46%，因此整个冻结水滴可以在20秒内融化。主动除冰与被动防冰相结合的策略无疑促进了高效防冰材料的发展，可应用于绝缘子防冰闪。
The accumulation of ice and contaminants on the surface of composite insulators will cause high energy consumption or even major hazards to power systems. In this work, the polydimethylsiloxane (PDMS) silicone rubber was modified by surface micropatterning and material compositing. Highly crosslinked poly(cyclotriphosphazene-co-4,4'-sulfonyldiphenol) (PZS) was used to directly coat ferroferric oxide (Fe3O4) nanoparticles. The obtained core-shell Fe3O4@PZS microspheres were loaded with carbon nanotubes (CNTs) to get CNTs/Fe3O4@PZS as the photothermal magnetic filler. The PDMS/CNTs/Fe3O4@PZS surfaces with micronscale truncated cones were prepared via a combined method of compression molding and magnetic attraction. The 1H,1H,2H,2H-perfluorodecyltrichlorosilane-coated template and magnetic field can increase the height of the microstructure to similar to 76 mu m and maintain the contact angle of microstructured PDMS/CNTs/Fe3O4@PZS surfaces at a high level (similar to 152 degrees). Compared with the flat PDMS surface, the micronscale truncated cones extend the freezing time from 4.5 to 11.5 min and also undermine the ice adhesion strength from similar to 25 to similar to 17 kPa for the microstructured PDMS/CNTs/Fe3O4@PZS surface. The temperature of the PDMS/CNTs/Fe3O4@PZS surface molded with magnetic attraction increases linearly with time and the internal magnetic fillers and achieves 280 degrees C in 10 s. The efficiency of temperature rise is increased by similar to 46%, and hence the entire frozen water droplet can melt within 20 s. The strategy combining active deicing with passive anti-icing undoubtedly promotes the development of high efficiency anti-icing materials and can be applied on insulators to prevent icing flashover.