Anti-icing propagation and icephobicity of slippery liquid-infused porous surface for condensation frosting

Jiang, Jing; Sheng, Qiang; Tang, G.H.; Yang, M.Y.; Guo, Lin

doi:10.1016/j.ijheatmasstransfer.2022.122730

Cited by 30 publications

(11 citation statements)

References 47 publications

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“…The macroscopic and microscopic images of frost at different times were recorded, and the results are shown in Figures and S7. Frost formed on the bare surface quickly due to the small thermal resistance between the hydrophilic substrate and condensed droplets . Finally, the dense frost layer covered the bare surface, and the frost weight at 2.0 h reached 0.2146 g. For the SHP, water condensed on the surface at 0.5 h, and the droplets coalesced and grew.…”

Section: Resultsmentioning

confidence: 99%

“…Frost formed on the bare surface quickly due to the small thermal resistance between the hydrophilic substrate and condensed droplets. 58 Finally, the dense frost layer covered the bare surface, and the frost weight at 2.0 h reached 0.2146 g. For the SHP, water condensed on the surface at 0.5 h, and the droplets coalesced and grew. However, some droplets were pinned on the SHP surface (Figure S7) as high humidity weakens its superhydrophobicity, which accelerates the formation of nucleation.…”

Section: Porositymentioning

confidence: 97%

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Key Factors Affecting Durable Anti-Icing of Slippery Surfaces: Pore Size and Porosity

Xiang

Yuan

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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Slippery liquid-infused porous surfaces (SLIPSs) are widely used as an effective passive approach to reduce icing disasters. However, various porous structures make SLIPSs exhibit different droplet mobility and lubricant stability. Undoubtedly, the substrate surface has a great impact on the durable anti-icing of SLIPSs. Herein, surfaces with different pore sizes and porosities were prepared to study their effects on the performance of SLIPS. The results show that small pores and high porosity are beneficial for the preparation of durable anti-icing SLIPS. The small pore size (about 100 nm) has a strong capillary pressure on the lubricant, and the surface with high porosity (66%) possesses a large lubricant–liquid contact ratio. These two can greatly improve the lubricant stability of SLIPS and achieve rapid self-healing. The SLIPS prepared by a suitable porous surface shows excellent anti-icing performance in the simulated glaze ice and durable anti-icing ability in the long-term icing/deicing cycles. In detail, the prepared SLIPS experiences more than 140 icing/deicing cycles through four effective self-healing while maintaining extremely low ice adhesion (<20 kPa). This work proposes a certain improved SLIPS with small pores and high porosity to achieve excellent durable anti-icing performance, broadening the practical applications of SLIPS.

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Section: Resultsmentioning

confidence: 99%

Section: Porositymentioning

confidence: 97%

Key Factors Affecting Durable Anti-Icing of Slippery Surfaces: Pore Size and Porosity

Xiang

Yuan

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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show abstract

“…The delay time can be explained from two aspects: one is the heat transfer effect. 68 Solid−liquid heat conduction is the main heat transfer mode of water droplets on the surface. The heat transfer , where λ is the thermal conductivity, A is the solid−liquid contact area, d(T w − T f )/dx is the rate of temperature change is mainly related to the thermal conductivity and the contact area.…”

Section: Freezing Timementioning

confidence: 99%

“…The far droplet spacing can hinder the formation of ice bridges, thereby delaying the frost propagation. 68 The condensation and frosting behaviors of water on SLIPS are related to lubricant thickness and interfacial tension. 69 First, the thermodynamic state of the droplet on the lubricated surface was calculated according to the Smith model 71 (Figure S9; calculation details can be found in the Supporting Information).…”

Section: Freezing Timementioning

confidence: 99%

Anti-Icing Mechanism for a Novel Slippery Aluminum Stranded Conductor

Xiang

Yuan

Zhu

et al. 2023

ACS Appl. Mater. Interfaces

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The icing of transmission conductor seriously threatens the safe operation of power grids. Slippery lubricant-infused porous surface (SLIPS) has shown great potential for anti-icing applications. However, aluminum stranded conductors have complex surfaces, and the current SLIPSs are almost prepared and studied on small flat plates. Herein, the construction of SLIPS on the conductor was realized through anodic oxidation and the anti-icing mechanism of the slippery conductor was studied. Compared to the untreated conductor, the SLIPS-conductor reduces the icing weight by 77% in the glaze icing test and shows very low ice-adhesion strength (7.0 kPa). The excellent anti-icing performance of the slippery conductor is attributed to the droplet impact dynamics, icing delay, and lubricant stability. The dynamic behavior of water droplets is most affected by the complex shape of the conductor surface. Specifically, the impact of the droplet on the conductor surface is asymmetric and the droplet can slide along the depression in low-temperature and high-humidity environments. The stable lubricant of SLIPS increases both the nucleation energy barriers and the heat transfer resistance, which greatly delays the freezing time of droplets. Besides, the nanoporous substrate, the compatibility of the substrate with the lubricant, and the lubricant characteristics contribute to the lubricant stability. This work provides theoretical and experimental guidance on anti-icing strategies for transmission lines.

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“…Since Worthington drew the initial renderings of impacting droplets in 1876, the complex dynamics of droplets impacting solid surfaces have attracted the attention of many scientists. , The motion information and physical mechanism of impacting droplets have essential research value and vast application potential. From anti-icing of aircraft surfaces to microfluidics in a lab-on-a-chip, − this dynamic process plays a vital role in many fields. However, different fields have different requirements for droplet-impacting behavior.…”

Section: Introductionmentioning

confidence: 99%

Directional Drop Rebound on Adhesive-Gradient Micro–Nanostructured Surfaces Formed by a Femtosecond Laser

et al. 2023

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The dynamic behavior of droplets hitting a solid surface has received extensive attention due to its broad application prospects. Additionally, controlling the rebound behavior of impacting droplets is an important research topic. Current methods for investigating this behavior focus on the construction of a differentiated wettability surface, which is characterized by contact angle measurements, or a differentiated topography surface, which is represented by geometric height. This information allows one to obtain the nonuniform kinetic energy distribution of rebounding droplets and to realize control of rebounding droplet behavior. In this paper, femtosecond laser processing is proposed for the fabrication of an anisotropic surface with differences in adhesion, which allows for the control of impacting droplet rebound behavior. The experimental results show that the micro−nanostructure of the surface affects its adhesion. By changing the micro−nanostructure of the solid surface, the difference in surface adhesion can be controlled, thereby realizing precise control of impacting droplet rebound behavior. This study demonstrates that the micro−nanostructured surface formed by a femtosecond laser can be used to control a droplet rebound direction and landing site, which is of great significance to the development of liquid transport, microfluidic devices, and other fields.

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Anti-icing propagation and icephobicity of slippery liquid-infused porous surface for condensation frosting

Cited by 30 publications

References 47 publications

Key Factors Affecting Durable Anti-Icing of Slippery Surfaces: Pore Size and Porosity

Key Factors Affecting Durable Anti-Icing of Slippery Surfaces: Pore Size and Porosity

Anti-Icing Mechanism for a Novel Slippery Aluminum Stranded Conductor

Directional Drop Rebound on Adhesive-Gradient Micro–Nanostructured Surfaces Formed by a Femtosecond Laser

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