Abstract
A breakdown caused by the icing of power generation infrastructure is one of the serious disasters occurring in the power system. Slippery lubricant-infused porous surfaces (SLIPSs), whose ice adhesion strength is extremely low, have a promising application in the anti-icing field. In the present study, we fabricated SLIPSs with low ice adhesion strength by infusing silicone oil into an anodic aluminum oxide (AAO) substrate. In addition, the effects of the viscosity of silicone oil on the anti-icing properties and durability of the SLIPSs were investigated. The results show that a lower viscosity silicone oil brings about more slippery surfaces and lower ice adhesion strength. The ice adhesion strength was reduced by 99.3% in comparison with the bare Al alloy. However, low-viscosity silicone oil has worse de-icing resistance and heat resistance. Additionally, the porous films filled with low-viscosity silicone oil possess a better self-healing property after icing/de-icing cycles and followed by exposure to the atmosphere. When the viscosity of silicone oil is 50 mPa·s, the SLIPSs exhibit the best durability for anti-icing. Even after 21 de-icing tests or 168 h of heating at 90 °C, the ice adhesion strength still remains below 10% compared with that of bare Al. This work provides some useful advice for the design and fabrication of anti-icing SLIPSs.
Highlights
The accumulation of ice on aluminum conductors can cause disastrous problems, such as line breaking and tower collapse, due to the increased weight overloading the structures [1,2]
The inset in Figure 3b indicate that the distribution of silicon was relatively uniform in the crossThese results demonstrate that the silicone oil with various viscosities fully infused into the anodic aluminum oxide (AAO)
ConclusionsIn summary, we fabricated a Slippery lubricant-infused porous surfaces (SLIPSs) with extremely low ice adhesion strength using anodization to form a nanopore structure, modifying the nanopore, and subsequently infusing silicone oil into the nanopore
Summary
The accumulation of ice on aluminum conductors can cause disastrous problems, such as line breaking and tower collapse, due to the increased weight overloading the structures [1,2]. Conventional strategies to solve icing problems included removing ice from conductors before failure occurs, such as overcurrent ice-melting and mechanical de-icing [3,4]. These methods have low efficiency and high energy consumption and can even damage the equipment [5,6]. Recent reports have indicated that superhydrophobicity would be lost if water vapor condensed on the micro-nanostructure of superhydrophobic surfaces under conditions of low temperature with high humidity [11]. The mechanical interlocking effect between the ice and the micro-nanostructure of superhydrophobic surfaces has led to an increase in the ice adhesion strength [12,13]
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