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Bio-inspired special wetting surfaces via self-assembly

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Science China Chemistry 2012年第11期55卷 2327-2333页

作者： JIN Xu YANG Shuai LI Zhou liu kesong JIANG Lei Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministty of Educatio School of Chemistry and EnviromnentBeihang UniversioBeijing 100191China Beijing National Laboraloty for Molecular Sciences(BNI.MS) Key Laboratoryof Organic SolidsInstitute of Chemistry Chinese Academy of SciencesBeijing 100190China Institute of Petroleum Exploration and Development Beijing 100191China

Self-assembly is the fundamental principle, which can occur spontaneously in nature. Through billions of years of evolution, nature has learned what is optimal. The optimized biological solution provides some inspiration for scientists and engineers. In the past decade, tinder the multi-disciplinary collaboration, bio-inspired special wetting surfaces have attracted much attention for both fundamental research and practical applications. In this review, we focus on recent research progress in bio-inspired special wetting surfaces via self-assembly, such as low adhesive superhydrophobic surfaces, high adhesive superhydrophobic surfaces, superamphiphobic surfaces, and stimuli-responsive surfaces. The challenges and perspectives of this research field in the future are also briefly addressed.

关键词： bio-inspired materials superhydrophobic superamphiphobic

Hierarchical structures hydrogel evaporator and superhydrophilic water collect device for efficient solar steam evaporation

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Nano Research 2021年第4期14卷 1135-1140页

作者： Wenwei Lei Sovann Khan Lie Chen Norihiro Suzuki Chiaki Terashima kesong liu Akira Fujishima Mingjie liu Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191China Photocatalysis International Research Center Tokyo University of Science2641 YamazakiNodaChiba 278-8510Japan

Efficient light absorption and trapping are of vital importance for the solar water evaporation by hydrogel-based photothermal conversion *** strategies are focused on the development of the composition and structure of the hydrogers internal *** our point of view,the importance of the surface structure of hydrogel has usually been underestimated or *** inspired by the excellent absorbance and water transportation ability of biological surface structure,the hierarchical structured hydrogel evaporators(HSEs)increased the light absorption,trapping,water transportation and water-air interface,which is the beneficial photothermal conversion and water *** HSEs showed a rapid evaporation rate of 1.77 kg·m^(-2)·h^(-1)at about 92%energy efficiency under one sun(1 kW·m^(-2)).Furthermore,the superhydrophilic window device was used in this work to collect the condensed water,which avoids the light-blocking caused by the water mist formed by the small droplets and the problem of the droplets stick on the device dropping back to the bulk *** with the excellent photothermal conversion hydrogel and superhydrophilic window equipment,this work provides efficient evaporation and desalination of hydrogel-based solar evaporators in practical large-scale applications.

关键词： light-trapping large-scale hierarchical structure hydrogel evaporator solar steam evaporation superhydrophilic window

Bio-inspired superhydrophobic magnesium alloy surfaces with active anti-corrosion and self-healing properties

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Nano Research 2023年第2期16卷 3312-3319页

作者： Qiang Li Xudong Zhang Shuang Ben Zhihong Zhao Yuzhen Ning kesong liu Lei Jiang Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology School of Chemistry Beihang UniversityBeijing 100191China School of Mechanical Engineering and Automation Beihang UniversityBeijing 100191China

Bio-inspired superhydrophobic magnesium(Mg)alloy surfaces are of increasing interest in corrosion protection due to superior barrier and shielding ***,superhydrophobic(SHB)anti-corrosion surfaces are susceptible to damage,which limit their extensive *** this end,a micro/nano structure-functional molecule SHB composite coating with self-healing and active anti-corrosion dual-function properties was designed on Mg alloys *** dual-function SHB composite anti-corrosion coating based on lauric acid(La)intercalated and modified hydrotalcite(La-LDH)consisted of three-layer structure,namely La-LDH powder/polydimethylsiloxane(PDMS)/La-LDH *** anti-corrosion performance of as-prepared coatings was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy(EIS).The results indicate that the SHB coating shows excellent active corrosion ***,we also examined the self-healing and anti-corrosion properties of SHB coating upon physical damage and explained the healing *** heat treatment,the damaged SHB coating regain its surface microstructure and corrosion protection *** work expands new insights for the wide application of Mg alloys and the research in the field of metal protection.

关键词： magnesium alloys anti-corrosion coating superhydrophobic self-healing active anti-corrosion property

A bioinspired magnetic responsive cilia array surface for microspheres underwater directional transport

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Science China Chemistry 2020年第3期63卷 347-353页

作者： Shuang Ben Jinjia Yao Yuzhen Ning Zhihong Zhao Jinlong Zha Dongliang Tian kesong liu Lei Jiang Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology School of Chemistry Beihang UniversityBeijing 100191China Beijing Advanced Innovation Center for Biomedical Engineering Beihang UniversityBeijing 100191China

Bio-inspired surfaces are usually designed by imitating the surface properties of a particular biological species,or combing with the surface characteristics of multiple biological species to construct a cross-species ***,inspired by the structure and rhythmic swing of human pulmonary cilia,and the directional migration of pigeons by geomagnetic field,an integrated system of biomimetic hydrophobic magnetic cilia array surface with reversible deformation properties and excellent magnetic response performance for solid microspheres underwater transport is designed and *** by an external magnetic field,the magnetic responsive cilia array surface can directionally and continuously transport microspheres underwater in periodic *** work will shed new light on the designing of micromanipulation systems for micro-objects transport,and promote the practical application of micro-operating systems in underwater transportation and drug delivery.

关键词： cilia-inspired surface underwater microspheres transport magnetic response micro-operating system

Robust superhydrophobicity of hierarchical ZnO hollow microspheres fabricated by two-step self-assembly

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Nano Research 2013年第10期6卷 726-735页

作者： Ziqi Sun Ting Liao kesong liu Lei Jiang Jung Ho Kim Shi Xue Dou Institute for Superconducting and Electronic Materials University of Wollongong Innovation Campus North Wollongong NSW 2500 Australia Australian Institute for Bioengineering and Nanotechnology the University of Queensland St Lucia QLD 4072 Australia Key Laboratory of Bio-inspired Smart Interracial Science and Technology of Ministry of Education School of Chemistry and Environment Beijing University of Aeronautics &Astronautics Beijing 100191 China Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China

Superhydrophobic and superhydrophilic surfaces have been extensively inves- tigated due to their importance for industrial applications. It has been reported, however, that superhydrophobic surfaces are very sensitive to heat, ultraviolet （UV） light, and electric potential, which interfere with their long-term durability. In this study, we introduce a novel approach to achieve robust superhydrophobic thin films by designing architecture-defined complex nanostructures. A family of ZnO hollow microspheres with controlled constituent architectures in the morphologies of 1D nanowire networks, 2D nanosheet stacks, and 3D mesoporous nanoball blocks, respectively, was synthesized via a two-step self-assembly approach, where the oligomers or the constituent nanostructures with specially designed structures are first formed from surfactant templates, and then further assembled into complex morphologies by the addition of a second co-surfactant. The thin films composed of two-step synthesized ZnO hollow microspheres with different architectures presented superhydrophobicities with contact angles of 150°-155°, superior to the contact angle of 103° for one-step synthesized ZnO hollow microspheres with smooth and solid surfaces. Moreover, the robust superhydrophobicity was further improved by perfluorinated silane surface modification. The perfluorinated silane treated ZnO hollow microsphere thin films maintained excellent hydrophobicity even after 75 h of UV irradiation. The realization of environmentally durable promising solution for their long-term irradiations. superhydrophobic surfaces provides a service under UV or strong solar light

关键词： ZnO hierarchical structure two-step self-assembly nanomaterials robustsuperhydrophobicity

Bio-inspired multifunctional metallic glass

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Science China Chemistry 2016年第3期59卷 271-276页

作者： Yaxu He Yun Peng Zhou Li Jiang Ma Xiyao Zhang kesong liu Weihua Wang Lei Jiang Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education Beijing Key Laboratory of Bio-Inspired Energy Materials and DevicesSchool of Chemistry and EnvironmentBeihang UniversityBeijing100191China Institute of Physics Chinese Academy of SciencesBeijing100190China Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing100190China

As a novel class of metallic materials, bulk metallic glasses(BMGs) have attracted a great deal of attention owing to their technological promise for practical engineering applications. In nature, biological materials exhibit inherent multifunctional integration, which provides some inspiration for scientists and engineers to construct multifunctional artificial materials. In this contribution, inspired by superhydrophobic self-cleaning lotus leaves, multifunctional bulk metallic glasses(BMG) materials have been fabricated through the thermoplastic forming-based process followed by the SiO_2/soot deposition. To mimic the microscale papillae of the lotus leaf, the BMG micropillar with a hemispherical top was first fabricated using micro-patterned silicon templates based on thermoplastic forming. The deposited randomly distributed SiO_2/soot nanostructures covered on BMG micropillars are similar to the branch-like nanostructures on papillae of the lotus leaf. Micro-nanoscale hierarchical structures endow BMG replica with superhydrophobicity, a low adhesion towards water, and self-cleaning, similar to the natural lotus leaf. Furthermore, on the basis of the observation of the morphology of BMG replica in the Si mould, the formation mechanism of BMG replica was proposed in this work. The BMG materials with multifunction integration would extend their practical engineering applications and we expect this method could be widely adopted for the fabrication of other multifunctional BMG surfaces.

关键词： biological materials bio-inspired materials multifunction

Unidirectional movement behavior of underwater bubbles on the wettability gradient mesh via asymmetrical bounce

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Science China Chemistry 2024年第8期67卷 2606-2613页

作者： Yuzhen Ning Zhihong Zhao Shuang Ben Qiang Li Cunming Yu Xudong Zhang Huawei Chen kesong liu Lei Jiang School of Mechanical Engineering and Automation Beihang UniversityBeijing 100191China Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology School of ChemistryBeihang UniversityBeijing 100191China Research Institute of Aero-Engine Beihang UniversityBeijing 100191China School of Materials Science and Engineering Shenyang Ligong UniversityShenyang 110159China Tianmushan Laboratory Hangzhou 310023China The Analysis Testing CenterBeihang UniversityBeijing 100191China

The impact of underwater bubbles on solid surfaces with a gradient wettability is important for fundamental science and technological applications. Despite progress in the translational motion of underwater bubbles on asymmetric surface, a fundamental dynamic understanding of asymmetrical bounce behavior of the underwater bubble needs to be further ***, we investigate asymmetrical bounce of underwater bubbles after impacting the wettability gradient copper mesh *** bounce of the underwater bubble on the wettability gradient mesh(WGM) surface is composed by asymmetrical spread in the spread process and asymmetrical recoil in the recoil process, which induce the unidirectional movement ***, effective bubble-size manipulation can be easily implemented due to different volumes of bubbles remaining at different locations of WGM surface. We envision that this work will provide a new understanding of asymmetrical bounce behavior of the underwater bubble on the wettability gradient surface, and propose a novel and feasible strategy for constructing the underwater bubble manipulation system.

关键词： asymmetrical bounce unidirectional movement behavior gradient wettability

Engineering electrode wettability to enhance mass transfer in hydrogen evolution reaction

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Nano Research Energy 2023年第2期2卷 203-206页

作者： Chunhui Zhang Ziwei Guo Ye Tian Cunming Yu kesong liu Lei Jiang School of Chemistry Beihang UniversityBeijing 100191China Technical Institute of Physics and Chemistry Chinese Academy of SciencesBeijing 100190China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China

In hydrogen evolution reaction,inefficient mass transfer caused by bubble adhesion on electrode,bubble dispersion in electrolyte and slow H2 diffusion,has greatly impeded the reaction *** techniques can only resolve bubble adhesion or bubble dispersion *** that simultaneously solve bubble adhesion,bubble dispersion and poor hydrogen diffusion problems is rarely ***,an article reported a new electrode with special wettability design,which can efficiently promote bubble transfer and dissolved H2 *** design can simultaneously solve above mentioned three mass transfer issues and improve electrode *** summarize the remaining challenges of this work and outlook potential approaches to promote mass transfer in gas-evolution reactions.

关键词： hydrogen evolution reaction wettability bubble mass transfer

Flexible dual-Janus porous membrane for underwater gas bubbles anti-buoyancy unidirectional transportation

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Science China Chemistry 2024年

作者： Shuang Ben Han Ma Rui liu Yuzhen Ning Zhihong Zhao Xudong Zhang Qiang Li kesong liu School of Materials Science and Engineering Shenyang Ligong University Tianmushan Laboratory School of Equipment Engineering Shenyang Ligong University Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology School of Chemistry Beihang University School of Mechanical Engineering and Automation Beihang University

Controllable transportation of bubbles in surfactant or aqueous is very important in daily chemical products, food fermentation,mineral flotation and other fields. However, bubbles are mainly dominated by buoyancy and move upward in solution, which makes the manipulation of bubbles difficult. Although some progress has been made in controlling underwater bubbles,achieving continuous transportation and collection of underwater bubbles without relying on external forces is still a great challenge. To this end, we bionically designed a flexible polydimethylsiloxane(PDMS) porous surface with dual-Janus characteristics. Namely, a porous PDMS membrane integrating structural gradient and wettability gradient realizes the underwater anti-buoyancy unidirectional transportation of bubbles without external force input, and possesses the capability of underwater gas anti-buoyancy transportation and storage. This work provides inspiration and direction for the development and design of underwater gas transportation and storage devices and provides innovative thinking for the implementation of seabed carbon dioxide storage technology.

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