Programmable droplet transport on multi-bioinspired slippery surface with tridirectionally anisotropic wettability

Cai, Zexin; Chen, Faze; Tian, Yanling; Zhang, Dawei; Lian, Zhongxu; Cao, Moyuan

doi:10.1016/j.cej.2022.137831

Cited by 50 publications

(24 citation statements)

References 69 publications

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“…The increasing water contact angle in the parallel direction was 117.3°, smaller than that in the perpendicular direction at 136.2°, which indicated that the spreading of the droplet in the up and down directions was significantly improved by the oriented fibers. 42,43 Furthermore, Fig. 6b confirms that this screen window shows excellent reusability in terms of water transportation performance and broad application prospects in the field of architecture.…”

Section: Resultssupporting

confidence: 62%

One-step electrospinning PMMA-SPO with hierarchical architectures as a multi-functional transparent screen window

et al. 2022

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Section: Resultssupporting

confidence: 62%

One-step electrospinning PMMA-SPO with hierarchical architectures as a multi-functional transparent screen window

et al. 2022

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“…Prediction of the droplet sliding resistance is essential for designing reliable functional surfaces for sophisticated droplet manipulations, 64 such as droplet capturing, transferring, mixing, and so forth. In this work, we applied the Furmidge equation to calculate the resistance of droplets sliding off the SLIPS patterns.…”

Section: Resultsmentioning

confidence: 99%

Bionic surface diode for droplet steering

Yang

et al. 2023

Droplet

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Control of droplet sliding and its interfacial behavior such as sliding resistance and friction have important applications in microfluidic and energy-related fields. Nature provides many examples of interface-driven droplet sliding control; yet, to date, the continuous governing of the multiphase process and precise steering of droplet sliding remain challenging. Here, directional-dependent ultraslippery patterned surfaces with significant droplet sliding anisotropy were created by coordinating the heterogeneous wettability of the back of the dessert beetle, directionaldependent architecture of the butterfly wing, and ultraslippery configuration of the Nepenthes alata. Analysis of the sliding resistance on typical ultraslippery patterned surfaces reveals that the directional-dependent triple phase line (TPL) immigration on the ultraslippery patterns dominates the strong sliding anisotropy, which can be modeled using the classic Furmidge equation. In particular, the sliding anisotropy for the semicircular ultraslippery patterned surface shows threefold higher than that of natural butterfly wings due to the most significant difference in TPL immigration in two opposite directions, which enables the simultaneous handling of multiple droplets without mass loss and steering of droplet sliding/friction. This work may transform the design space for the control of multiphase interface motion and the development of new lab-on-a-chip and droplet-based microsystems.

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“…2k). (Liu et al, 2020), MeTro/Go hybrid hydrogels (Annabi et al, 2016), SNP-Gels and SIPN-Gels9:1 (Su et al, 2019), APNC (Teng et al, 2016), PUH (Huang et al, 2020) Wettability characterization of membrane Apart from mechanical properties, the difference in interfacial wettability of ANF/wood separation membranes for the oil and water phases is necessary for efficient emulsion separation (Cai et al 2022). Natural wood is hydrophilic and oleophilic in air (Fig.…”

Section: Resultsmentioning

confidence: 99%

Easy preparation of wood-base membrane with fouling resistance in complex environments for efficient oil-water emulsion separation

Zhang

Teng

Zhai

et al. 2023

Preprint

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Oily wastewater poses a serious threat to the ecological environment and human health, and there is a great deal of concern about how to treat it effectively. Although there has been considerable development in recent years in the treatment of oil-water emulsions using separation membranes with special wettability, they still suffer from real problems such as complex preparation processes, material contamination, so developing an economical and environmentally friendly, high-performance membrane is a significant challenge. In this work, a wood-based membrane was easily prepared by a simple dipping process using aramid nanofiber (ANF) to modify the surface of wood. The wet ANF/wood membrane reveals higher tensile strength (1.69±0.32 MPa) than synthetic hydrogel membranes. More importantly, the membrane presents the underwater superoleophobic properties and fouling resistance under complex environmental conditions (acid, alkali, seawater, and high temperature), and effectively separate various oil-water emulsions with high separation efficiency (>99.3%) and flux (>227 L m-2 h-1). More excitingly, the membrane remains the original separation properties after 13 cycles of oil-water emulsion separation, Therefore, the inexpensive, environmentally friendly and easily prepared ANF/wood membrane is well tolerated under extreme conditions, presents excellent separation performances and provides a material basis for the treatment of actual oily wastewater.

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Programmable droplet transport on multi-bioinspired slippery surface with tridirectionally anisotropic wettability

Cited by 50 publications

References 69 publications

One-step electrospinning PMMA-SPO with hierarchical architectures as a multi-functional transparent screen window

One-step electrospinning PMMA-SPO with hierarchical architectures as a multi-functional transparent screen window

Bionic surface diode for droplet steering

Easy preparation of wood-base membrane with fouling resistance in complex environments for efficient oil-water emulsion separation

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