Bio-inspired slippery surfaces with multifunctional anti-icing performance

Miao, Shuangshuang; Wang, Yu; Zhao, Yuanjin; Chen, Yongping

doi:10.1007/s11431-020-1805-9

Cited by 12 publications

(7 citation statements)

References 42 publications

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“…The textured surface of IOs functionalized with hydrophobic molecules can also be used as a superhydrophobic material. By infusing lubricant into IOs, an omniphobic surface with low contact angle hysteresis is created. , This fits well within the family of slippery liquid-infused porous surface (SLIPS) materials, which show exceptional antifouling properties due to their ability to repel any contaminating substances, including ice, blood, and bacteria . The reentrant curvature of the IO pore openings firmly locks the lubricant within the structure, resulting in robust omniphobicity that prevails even after the application of strong shear forces and mechanical damage.…”

Section: Applicationsmentioning

confidence: 59%

“… 50 , 51 This fits well within the family of slippery liquid-infused porous surface (SLIPS) materials, 52 which show exceptional antifouling properties due to their ability to repel any contaminating substances, including ice, blood, and bacteria. 53 The reentrant curvature of the IO pore openings firmly locks the lubricant within the structure, resulting in robust omniphobicity that prevails even after the application of strong shear forces and mechanical damage. Structural color of these IOs can also act as a reporter for lubricant depletion.…”

Section: Applicationsmentioning

confidence: 99%

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Evaporation-Induced Self-Assembly of Metal Oxide Inverse Opals: From Synthesis to Applications

et al. 2022

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Conspectus Inverse opals (IOs) are highly interconnected three-dimensional macroporous structures with applications in a variety of disciplines from optics to catalysis. For instance, when the pore size is on the scale of the wavelength of visible light, IOs exhibit structural color due to diffraction and interference of light rather than due to absorption by pigments, making these structures valuable as nonfading paints and colorants. When IO pores are in an ordered arrangement, the IO is a 3D photonic crystal, a structure with a plethora of interesting optical properties that can be used in a multitude of applications, from sensors to lasers. IOs also have interesting fluidic properties that arise from the re-entrant geometry of the pores, making them excellent candidates for colorimetric sensors based on fluid surface tension. Metal oxide IOs, in particular, can also be photo- and thermally catalytically active due to the catalytic activity of the background matrix material or of functional nanoparticles embedded within the structure. Evaporation-induced self-assembly of sacrificial particles has been developed as a scalable method for forming IOs. The pore size and shape, surface chemistry, matrix material, and the macroscopic shape of the IO, as well as the inclusion of functional components, can be designed through the choice of deposition conditions such as temperature and humidity, types and concentrations of components in the self-assembly mixture, and the postassembly processing. These parameters allow researchers to tune the optical, mechanical, and thermal transport properties of IOs for optimum functionality. In this Account , we focus on experimental and theoretical studies to understand the self-assembly process and properties of metal oxide IOs without (bare) and with (hybrid) plasmonic or catalytic metal nanoparticles incorporated. Several synthetic approaches are first presented, together with a discussion of the various forces involved in the assembly process. The visualization of the deposition front with time-lapse microscopy is then discussed together with analytical theory and numerical simulations to determine the conditions needed for the deposition of a continuous IO film. Subsequently, we present high-resolution scanning electron microscopy (SEM) of assembled colloids over large areas, which provides a detailed view of the evolution of the assembly process, showing that the organization of the colloids is initially dictated by the meniscus of the evaporating suspension on the substrate, but that gradually all grains rotate to occupy the thermodynamically most favorable orientation. High-resolution 3D transmission electron microscopy (TEM) is then presented together with analysis of the wetting of the templating colloids by the matrix precursor to provide a detailed picture of the embedding of metallic nanoparticles at the pore–matrix interface. Finally, the resulting properties and applications in optics, wetting, and cata...

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Section: Applicationsmentioning

confidence: 59%

Section: Applicationsmentioning

confidence: 99%

Evaporation-Induced Self-Assembly of Metal Oxide Inverse Opals: From Synthesis to Applications

et al. 2022

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“…Because the freezing of water is the latent heat releasing process, in which the latent heat transfers from the higher temperature source of the water droplet to the lower temperature source of the cooler, therefore the hierarchical structures of SMCF play a crucial role in improving the anti-icing property. , The rough structures will trap lots of air pockets between the SMCF surface and the water droplet, which could dramatically reduce its contact area and increase the heat transfer resistance, further decreasing the interfacial latent heat transfer rate of water . Therefore, the SMCF surface can inhibit ice nucleation and hinder the ice crystal growth, thus greatly prolonging the freezing time . To further evaluate the anti-icing performance of SMCF, COMSOL simulations were used to investigate the freezing process of water on MCF (Figure d, Movie S9) and SMCF (Figure e, Movie S10) surfaces under the cooling conditions, and the corresponding physical models are displayed in Figures S2 and S4.…”

Section: Results and Discussionmentioning

confidence: 99%

“…42 Therefore, the SMCF surface can inhibit ice nucleation and hinder the ice crystal growth, thus greatly prolonging the freezing time. 43 To further evaluate the anti-icing performance of SMCF, COMSOL simulations were used to investigate the freezing process of water on MCF (Figure 7d, Movie S9) and SMCF (Figure 7e, Movie S10) surfaces under the cooling conditions, and the corresponding physical models are displayed in Figures S2 and S4. The simulation results indicate that the latent heat transfers from the water droplet to the cooler through the substrates.…”

Section: Resultsmentioning

confidence: 99%

In Situ Growth of a Stable Metal–Organic Framework (MOF) on Flexible Fabric via a Layer-by-Layer Strategy for Versatile Applications

Zhang

et al. 2022

ACS Nano

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Fabrics have been used broadly in daily life for an enormous variety of applications due to their intrinsic advantages, such as flexibility, renewability, and good processability. Integrating natural fabrics with metal−organic frameworks (MOFs) is an effective strategy to improve the added value of textiles with special functionalities. Here, a facile, lowcost, and scalable technology is reported for the in situ growth of MOFs on cotton fabrics. A uniform and dense coating of regular octahedral Cu-1,3,5-benzenetricarboxylic acid (CuBTC) crystals was formed on the fiber surface, followed by treatment with 1H,1H,2H,2H-perfluorooctyltriethoxysilane and triethoxyoctylsilane to create a superhydrophobic CuBTC@cotton fabric (SMCF), which greatly improved its water stability and extended superhydrophobic CuBTC's potential applications. The as-prepared MCF has a specific surface area of 229 m 2 /g, which is 11 times that of pristine fabrics (21 m 2 /g). This high porosity further endows the fabric with enhanced loading capacity of essential oils to enable excellent antibacterial ability. Moreover, the SMCF also exhibits excellent self-cleaning, UV shielding, and anti-icing performances. In addition, we performed COMSOL simulations to investigate the dynamic freezing process of water on the surface of samples, which agrees well with our experimental observations. By combining the merits of both fabrics and MOFs, the MCF is expected to extend the applications of traditional textiles in antifouling, safety, the fragrance industry, and healthcare for the next-generation multifunctional fabrics.

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“…Therein, the porous structure composed of a large number of micron‐scale pores and spheres with a size of ≈20 and ≈5 µm, respectively, (Figure 1b) with an oil storage capacity of ≈18.5 mg cm −2 , indicating that the porous structure can provide enough space for lubricant storage. [ 11 ] From the experiment, we found that the lubricant could flow not only above the surface, but also inside the structure (Figure S2 and Movie S1, Supporting Information). This result demonstrates a fine interconnection of the porous structure that underpins the unblocked mobility of the lubricant.…”

Section: Resultsmentioning

confidence: 99%

Sustainable Droplet Manipulation on Ultrafast Lubricant Self‐Mediating Photothermal Slippery Surfaces

Zhan

Xia

Liu

et al. 2022

Adv Funct Materials

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Designing intelligent slippery surfaces for droplet manipulation is critical for many applications from drug delivery to bio‐analysis, while is of great challenging in sustainability for inescapable wastage of lubricant layer. Herein, an ultrafast lubricant self‐mediating (self‐replenishing/‐absorbing) photothermal slippery surface is designed that achieves sustainable transport of droplet under the irradiation of near infrared light (NIL) even if the lubricant layer is wiped clean completely, as well as at other man‐made extreme conditions. The ultrafast lubricant self‐mediating performance is caused by synergistic effects of interconnection of porous structure and photothermal expansion of the material. When lubricant on surface is lost, photothermal expansion of material can quickly squeeze the lubricant inside the base to flow into and out of the interconnected porous structure to generate a fresh lubricant layer. Attractively, when the NIL is turned off, the rebuilt lubricant layer can be swiftly self‐absorbed into the porous to inhibit unnecessary wastage. Moreover, an arbitrary split of droplet in desired configurations can be achieved by controlling the NIL irradiating route. This sustainable droplet manipulation induced by ultrafast lubricant self‐mediating can be extensively applied in microfluidics and micro‐reactor settings.

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Bio-inspired slippery surfaces with multifunctional anti-icing performance

Cited by 12 publications

References 42 publications

Evaporation-Induced Self-Assembly of Metal Oxide Inverse Opals: From Synthesis to Applications

Evaporation-Induced Self-Assembly of Metal Oxide Inverse Opals: From Synthesis to Applications

In Situ Growth of a Stable Metal–Organic Framework (MOF) on Flexible Fabric via a Layer-by-Layer Strategy for Versatile Applications

Sustainable Droplet Manipulation on Ultrafast Lubricant Self‐Mediating Photothermal Slippery Surfaces

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