Bioinspired Unidirectional Liquid Spreading Channel–Principle, Design, and Manufacture

Zhang, Xiangyu; Dong-yue, Wang; Zhang, Yixuan; Zhang, Deyuan; Li, Zeming; Liu, Hao

doi:10.1002/admi.201901791

Cited by 6 publications

(5 citation statements)

References 39 publications

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“…Through microscale characterization of Nepenthes peristome, the anisotropic structural features have been extracted to be microgrooves with microcavities constructed by duckbilled arches at groove bottom. To rapidly and large-area fabricate the microgrooves with microcavities, mold replication is a useful method and many fabrication processes have been carried out [78,79] . By building the peristome 3D model, bioinspired unidirectional liquid transport surface is replicated from a high-resolution stereo lithography fabricated mold (Fig.…”

Section: Nepenthes Peristome Inspired Surfacesmentioning

confidence: 99%

Bioinspired Unidirectional Liquid Transport Micro-nano Structures: A Review

et al. 2021

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Unidirectional liquid transport without any need of external energy has drawn worldwide attention for its potential applications in various fields such as microfluidics, biomedicine and mechanical engineering. In nature, numerous creatures have evolved such extraordinary unidirectional liquid transport ability, such as spider silk, Sarracenia’s trichomes, and Nepenthes alata’s peristome, etc. This review summarizes the current progresses of natural unidirectional liquid transport on 1-Dimensional (1D) linear structure and 2-Dimensional (2D) surface structure. The driving force of unidirectional liquid transport which is determined by unique structure exist distinct differences in physics. The fundamental understanding of 1D and 2D unidirectional liquid transport especially about hierarchical structural characteristics and their transport mechanism were concentrated, and various bioinspired fabrication methods are also introduced. The applications of bioinspired directional liquid transport are demonstrated especially in fields of microfluidics, biomedical devices and anti-icing surfaces. With newly developed smart materials, various liquid transport regulation strategies are also summarized for the control of transport speed, direction guiding, etc. Finally, we provide new insights and future perspectives of the directional transport materials.

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Section: Nepenthes Peristome Inspired Surfacesmentioning

confidence: 99%

Bioinspired Unidirectional Liquid Transport Micro-nano Structures: A Review

et al. 2021

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“…Thus, the water droplet could only be moved from the inner to the outer, that is, directional transportation. In order to make better use of peristome structure, many theoretical foundations were discussed [61], and various bioinspired structures were proposed. One of the basic applications was liquid transportation which could be composed by different methods.…”

Section: Significant Wettability Structuresmentioning

confidence: 99%

“…In order to make better use of peristome structure, many theoretical foundations were discussed [61], and various bioinspired structures were proposed. One of the basic applications was liquid transportation which could be composed by different methods. Stretchable peristome film …”

Section: Nepenthes Peristomementioning

confidence: 99%

Biomimetic directional transport for sustainable liquid usage

Dong

2022

Biosurface and Biotribology

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Through hundreds of millions of evolution, animals and plants have possessed their unique structures to adapt to natural variations. As a familiar process, liquid transportation plays an important part in both production and life, and researchers focus on how to achieve this process in a convenient and efficient way without energy input. Inspired by nature, various bioinspired structures are reported and have won multiple achievements. This review starts from basic theory about surface wettability, and then summarises the creatures with special liquid transport functions as well as crucial structures that cause this phenomenon. Next, the recent articles about transporting liquid by bioinspired materials are introduced. Finally, we proposed a brief conclusion and the prospect of bionic materials in the future.

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“…Currently, the bionic Nepenthes alata peristome structures are processed using various methods, including replica forming [17,18], 3D printing [19,20], photolithography [19,21], microelectromechanical systems [22], and mechanical cutting [23,24]. However, the prepared Nepenthes alata peristome structures suffer from small structural dimensions, lack of abrasion resistance, and restrictive materials due to limitations in the respective processing methods and other objective factors.…”

Section: Introductionmentioning

confidence: 99%

One-step laser preparation of unidirectional liquid spontaneous transport structures

Zhang,

Wang,

Lian

et al. 2024

Surf. Topogr.: Metrol. Prop.

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The Tilted Wedge Microcavity Array (TWMA) structure of the Nepenthes alata peristome allows for unidirectional fluid transport without any surface energy gradient. However, current methods of creating bionic Nepenthes alata peristome structures have significant improvement room in terms of structural shape, machining efficiency, and cost-effectiveness. To address these issues, in this paper, bionic Nepenthes alata peristome TWMA structures on 7075 aluminium alloy was built via a nanosecond laser with highly efficiency, low cost and flexible processing pattern. A unilateral tilted microcavity structure was fabricated by designing the laser processing path, and at the same time, the samples were tilted to change the angle at which the laser beam hit the working surface. This ensures that the microcavity is machined without destroying the microcavity structure underneath. The variation law of aluminum alloy ablation threshold under the influence of laser incidence angle was studied. The dimensional parameters of the TWMA structure were analysed in relation to laser incidence angle θ, laser processing power P, number of laser scans n, and laser scanning speed V. Additionally, liquid spreading tests were carried out on different surfaces of bionic structures, and the influence of surface wettability on the spreading results was investigated. The results indicate that the ablation threshold decreases initially and then increases with an increase in the laser incidence angle. This reflects the trend of the aluminium alloy absorption rate, which initially increases and then decreases with an increase in the incidence angle. For the prepared TWMA structure, the optimum speed of achieving the unidirectional spreading effect was found to be 2.41 mm/s with a surface contact angle (CA) of 35°. This study presents a low-cost and rapid preparation method for creating liquid unidirectional transport structures without any energy input.

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Bioinspired Unidirectional Liquid Spreading Channel–Principle, Design, and Manufacture

Cited by 6 publications

References 39 publications

Bioinspired Unidirectional Liquid Transport Micro-nano Structures: A Review

Bioinspired Unidirectional Liquid Transport Micro-nano Structures: A Review

Biomimetic directional transport for sustainable liquid usage

One-step laser preparation of unidirectional liquid spontaneous transport structures

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