Catalysts
·
2015
·Vol. 5
·期 3
·1388-1398
·
IF 2
Long-Long Wang,Xiao-Lu Cao,Ya-Jun Wang,Qiao-Xia Li
The newly proposed mimetic underpotential deposition (MUPD) technique was extended to modify Pd surfaces with Sb through immersing a Pd film electrode or dispersing Pd/C powder in a Sb(III)-containing solution blended with ascorbic acid (AA). The introduction of AA shifts down the open circuit potential of Pd substrate available to achieve suitable Sb modification. The electrocatalytic activity and long-term stability towards HCOOH electrooxidation of the Sb modified Pd surfaces (film electrode or powder catalyst) by MUPD is superior than that of unmodified Pd and Sb modified Pd surfaces by conventional UPD method. The enhancement of electrocatalytic performance is due to the third body effect and electronic effect, as well as bi-functional mechanism induced by Sb modification which result in increased resistance against CO poisoning.Keywords:formic acid oxidation;palladium;Sb modification;mimetic underpotential deposition
研究领域:
电化学
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Bionic Engineering
·
2021
·Vol. 18
·期 5
·1168-1178
·
IF 2.682
Liao Chenchen,Xia Yurou,Keshen A. Yinaer Nu,Dai Boya,Zhao Song’an,Hu Ziqing,Zheng Zaihang,Liu Yan
Inspired by nature, a superhydrophobic and magnetic melamine sponge (BFSM-MF) was fabricated by a one-step dip-coating method. Aiming at replacing nano-Fe 3 O 4 particles with a complex preparation process and high cost, the commercial and cheap Fe 3 O 4 originated from magnetite was employed as a magnetic substance. To acquire superhydrophobicity, the hierarchical mirco/nano-sized structure with low surface energy was mainly contributed by bonding hydrophobic Fe 3 O 4 and graphene with silicone resin onto the surface of the melamine sponge. The results demonstrated that the water and oil static contact angle values of BFSM-MF were 160° and 0°, revealing that BFSM-MF was superhydrophobic and super-oleophilic. Moreover, the self-cleaning ability, magnetic-driven oil absorption ability and continuous oil–water separation performance of BFSM-MF have also been evaluated. As expected, BFSM-MF possessed magnetic-driven oil absorption ability and the oil–water separation efficiency for light oil reaches 98% ± 1%. In addition, the adsorption capacity and recycling performance of different organic solvents were systematically investigated. Therefore, the development of biomimetic, fluorine-free and superhydrophobic foam with magnetic-driven effect has potential application value in marine oil spill treatment and separation of domestic oil pollution.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 20
·期 14
·2308127
·
IF 13.3
Hongsen Niu,Hao Li,Qichong Zhang,Eun-Seong Kim,Nam-Young Kim,Yang Li
Developing electronic skins (e-skins) with extraordinary perception through bionic strategies has far-reaching significance for the intellectualization of robot skins. Here, an artificial intelligence (AI)-motivated all-fabric bionic (AFB) e-skin is proposed, where the overall structure is inspired by the interlocked bionics of the epidermis-dermis interface inside the skin, while the structural design inspiration of the dielectric layer derives from the branch-needle structure of conifers. More importantly, AFB e-skin achieves intuition sensing in proximity mode and tactile sensing in pressure mode based on the fringing and iontronic effects, respectively, and is simulated and verified through COMSOL finite element analysis. The proposed AFB e-skin in pressure mode exhibits maximum sensitivity of 15.06 kPa −1 (<50 kPa), linear sensitivity of 6.06 kPa −1 (50–200 kPa), and fast response/recovery time of 5.6 ms (40 kPa). By integrating AFB e-skin with AI algorithm, and with the support of material inference mechanisms based on dielectric constant and softness/hardness, an intelligent material perception system capable of recognizing nine materials with indistinguishable surfaces within one proximity-pressure cycle is established, demonstrating abilities that surpass human perception.
研究领域:
机器人技术
·
人工智能
·
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Konghua Yang,Shiliang Chen,Yibin Liu,Yunhong Liang,Zhihui Zhang,Chunbao Liu
Achieving precise and rapid droplets manipulation in versatile directions transport remains a considerable challenge, however adhesion switchable transitions deemed to be rather serviceable. Here, a double-sided microplate array (DMPA) with bio-inspired Janus surfaces, is proposed to fulfill adjustable adhesion through surface wettability switching and microplate dynamic deformation, thereby executing the droplet multi-dimensional manipulation in response to dynamic magnetic field. The triple-coupled bio-inspired Janus surfaces are newly designed with a convex hull and striped structure respectively, inspired by the respiratory ciliary motion and surface properties of lotus and rice leaves. Leveraging variation in superhydrophobicity and low adhesion of convex hull side on Janus surface, diverse droplet directional transports are achieved in plane, such as high-speed horizontal transport (120 mm/s and 500 µL), anti-gravitational climbing (inclined by 15°), and selective droplet orientation. The adhesion switchable transition of surface striped structure on other side is predominated by solid–liquid contact lines evolution resulting from microplate bending deformation, realizing droplet capture/release for long-distance multi-dimensional transport. Concurrently, a magnetic-responsive droplet switch is developed based on multi-directional droplet manipulation, demonstrating enormous potential for practical application.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.4
Xuyong Tang,Fengxi Li,Sijun Huang,Li Xu,Lei Wang,Yi Guo
Nicotinamide-adenine dinucleotide (NADH) as biomimetic units combined with copper ion to form laccases mimics (Cu-NADH). Cu-NADH has the enhanced activity of copper center to mediate aryl C–H amination using air as green oxidants. It could successfully catalyze oxidative coupling between different aromatic compounds and 4-phenylurazole (yield: 72 ∼ 91 %). Recycling catalytic ability (up to 6 times) showed its excellent stability. The Cu-NADH nanozyme was certificated to catalyze C–H amination effectively, and highlighted that it was a proper way to design catalysts according to enzyme-like catalyzing non-natural reaction.
研究领域:
生物化学
·
催化化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF BIOMATERIALS APPLICATIONS
·
2024
·
IF 2.3
Fuhua Sun,Lishi Yang,Yi Zuo
To fabricate electroactive fibrous membranes and provide simulated bioelectric micro-environment for bone regeneration mimicking nature periosteum, a series of electroactive polyurethanes (PUAT) were synthesized using amino-capped aniline trimers (AT) and lysine derivatives as chain extenders. These PUAT were fabricated into fibrous membranes as guided bone tissue regeneration membranes (GBRMs) via electrospinning. The ultraviolet-visible (UV-vis) absorption spectroscopy and cyclic voltammetry (CV) of PUAT copolymers showed that the electroactive PUAT fibrous membranes had good electroactivity. Besides, the introduction of AT significantly improved the hydrophobicity and thermal stability of PUAT fibrous membranes and decreased the degradation rate of PUAT fibers in vitro. With the increasing content of AT incorporated into copolymers, the tensile strength and Young’s modulus of PUAT fibrous membranes increased from 4 MPa (PUAT0) to 15 MPa (PUAT10) and from 2.1 MPa (PUAT0) to 18 MPa (PUAT10), respectively. The cell morphology and proliferation of rat mesenchymal stem cells (rMSCs) on PUAT fibers indicated that the incorporation of AT enhanced the cell attachment and proliferation. Moreover, the expression levels of OCN, CD31, and VEGF secreted by rMSCs on PUAT fibers increased with the increasing content of AT. In conclusion, an electroactive polyurethane fibrous membrane mimicking natural periosteum was prepared via electrospinning and showed good potential application in guiding bone tissue regeneration.
研究领域:
生物材料学
·
组织工程
·
再生医学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Dandan Chen,Qianqian Liang,Feng Gao,Tianyu Liu,Yunqi Wu,Zhuo Zheng,Jian Kang,Ruizhang Xu,Ya Cao,Ming Xiang
Superior permeability and high selectivity are crucial performances criterion for reverse osmosis (RO) membranes. Inspired by aquaporin-based biomimetic membranes, the loose liposomes as artificial water channels were prepared by thin-layer hydration method with lyso -phospholipids (C14lyso) and cholesterol followed by incorporating liposomes into the polyamide selective layer via in situ interfacial polymerization to fabricate liposomes-based RO membranes (TFC-C14lyso). Stopped-flow tests verified that C14lyso liposomes possess fast water transportability and the effect of C14lyso liposomes on the intrinsic structure of the polyamide selective layer was comprehensively explored. Meanwhile, the structure and performance of the TFC-C14lyso membranes could be regulated by varying the liposome concentrations. As a result, TFC-C14lyso-2 (the concentration of C14lyso liposomes is 0.25 mg/mL) presented an optimal separation performance, showing high water permeance of 3.80 L m −2 h −1 bar −1 and NaCl rejection of 98.6 %. Moreover, the separation mechanism regarding the enhanced permeability of TFC-C14lyso-2 was profoundly revealed via the structure and performance comparison with TFC-DOPC fabricated by incorporating dense DOPC liposomes into its PA selective layer. Building on these studies, our work may provide a facile and versatile pathway for designing advanced membranes in desalination.
研究领域:
生物工程
·
材料科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Feng Deng,Yuan Dang,Lele Tang,Tianshuo Hu,Cuicui Ding,Xiaoqing Hu,Hui Wu,Lihui Chen,Liulian Huang,Yonghao Ni,Min Zhang
Nature provides rich bionic resources for the construction of advanced materials with excellent mechanical properties. In this work, inspired by animal tendons, a bionic collagen fiber was developed using collagen liquid crystals as the pre-oriented bioink. The texture of liquid crystalline collagen observed from polarized optical microscopy (POM) showed the specific molecular pre-orientation. Meanwhile, the collagen spinning liquids exhibited a minimal rise in viscosity upon increasing concentration from 60 to 120 mg/mL, indicating the feasible processability . The collagen fiber, which was prepared via wet spinning without being denatured, exhibited the favorable orientation of fibrils along its axis as observed with FESEM and AFM . Thanks to the synergistic effects between pre-orientation and shearing orientation, the maximum tensile strength and Young's modulus of collagen fibers reached 9.98 cN/tex (219.29 ± 22.92 MPa) and 43.95 ± 1.11 cN/tex (966.20 ± 24.30 MPa), respectively, which were also analogous to those of tendon. In addition, the collagen fiber possessed a desirable wet strength . Benefiting from the natural tissue affinity of collagen, the as-prepared bionic collagen fiber possessed excellent wound suture performance and biodegradability in vivo , which offers a new perspective for the potential of widespread applications of collagen fibers in biomedical fields .
研究领域:
生物材料学
·
医学工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Chenchen Liao,Yingge Li,Meihuan Gao,Yurou Xia,Weihong Chai,Xinying Su,Zaihang Zheng,Yan Liu
Inspired by the super-wetting phenomena in nature, superhydrophobic , fluorine-free and bio-based cotton fabrics with multi-functionality have been prepared by a facile impregnation method. In this work, in situ prepared polydopamine (PDA) was utilized as a binder to adsorb the 8 % flame retardants consisting of ammonium polyphosphate (APP) and β-cyclodextrin (CD) onto the surface of cotton fabric, which was then modified with hydrophobic hexadecyltrimethoxysilane (HDTMS) to change the surface energy. The water contact angle and rolling angle of the cotton fabrics were 154° and 5°, demonstrating excellent self-cleaning capability and oil-water separation efficiency (99 % ± 1 %). Compared with pure cotton fabrics, the multifunctional cotton fabrics had exceptional flame-retardant properties that cannot be ignited. In addition, the cotton fabrics maintained superhydrophobic and flame retardant properties after 600 cm sandpaper friction tests, 7 times oxygen plasma etching-repairing tests, 20 times tape peeling tests, and knife cutting tests. And the multi-functionality mechanism of superhydrophobic cotton fabrics has been illustrated in detail. Consequently, a green and bionic modification presented in this paper via a novel route satisfies the demand for safety and functionality of cotton fabrics in the actual application.
研究领域:
材料科学
·
纺织工程
·
环境科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Fei Liu,Yuhan Sun,Ze Wang,Bo Li,Shichao Niu,Junqiu Zhang,Zhiwu Han,Luquan Ren
Antireflection (AR) surfaces are essential for the fields of flexible displays, photovoltaic industry, medical endoscope, intelligent windows, etc. Although natural creatures with well-organized micro/nanostructures have provided some coupling design principles for the rapid development of bioinspired AR materials, the mechanical vulnerability, poor flexibility, and nonadjustability have been pointed out as the drawback of these nanostructures. Here, a bioinspired reversible AR film with 4% reflectivity, 90% transmittance, and 9% haze in broadband (400–900 nm) was prepared. The flexible switching of AR performance enhancement and weakening throughout the visible wavelength band has been achieved by controlling the reversible change in the morphology of the interface structure. A variety of patterned film samples can be obtained by simply changing the template, which can be used in intelligent identification fields such as anticounterfeiting. The cycle test and photoelectric test show that the bionic reversible antireflection structure has certain stability and can effectively reduce the loss of photovoltaic cell conversion efficiency caused by mechanical deformation. It has broad application prospects in the fields of anticounterfeiting, intelligent window, flexible display, photoelectric element, and so on.
研究领域:
材料科学
·
光学工程
·
生物仿生学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2025
·
IF 4.3
Xue Gao,Chaosheng Li,Chengbin Shen
To address water scarcity in arid regions, this study proposes a high-efficiency fog harvesting material development strategy based on wettability gradient regulation. Controllable assembly of polyvinyl chloride nanofibers with bead-on-string structures on hydrophilic substrate surfaces is achieved through a 5 min electrospinning process. The fabricated Janus membrane achieves a contact angle differential of 141°, establishing an asymmetric wetting structure that enables directional droplet transport. Experimental data show that its fog water collection flux is 2.1 times higher than those of traditional hydrophilic materials. Surface water droplets were absorbed by the Janus membrane in only 2 ms, while they were absorbed by the hydrophilic membrane in at least 5 ms. Moreover, after the water droplets were absorbed, the Janus membrane surface can remain in a fresh, dry state, which is conducive to further water absorption. The underlying mechanisms for the enhanced fog harvesting performance were detailed, with numerical simulations used to study the impact of the hydrophilic layer’s wettability on liquid penetration. Such a Janus membrane can be a promising candidate for fog harvesting against the water crisis.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Haibin Zhao,Xuerui Zang,Yuanyuan Shen,Ming Tan,Peng Wang,Jiajia Wu
High transparency and durable antifouling surfaces are crucial for Marine applications. However, achieving a long-lasting marine coating that combines both antifouling properties and high transmittance remains a significant challenge. In this study, we present a novel high-adhesion, self-healing Slippery Liquid-Infused Porous Surface (SLIPS) antifouling coating with a unique three-arm structure, designed from a poly(dimethylsiloxane) supramolecular polymer, inspired by the design of natural spider webs. This structure leverages multistrength dynamic hydrogen bonds, including a quadruple hydrogen bond motif, the 2-ureido-4-pyrimidinone (UPy) unit. The three-arm structure enhances adhesion by providing additional binding sites, which facilitate interactions with interfacial groups through the dynamic rearrangement of UPy units. Importantly, the coating exhibits enhanced chain mobility due to the placement of UPy units on the side chains, resulting in a self-healing efficiency of 80% after 24 h in underwater environments. This performance is substantially higher than that of coatings with UPy units in the main chain, which achieve only 30% efficiency. Furthermore, the prepared coating not only exhibited improved transparency (∼93.9%) but also demonstrated flexibility, antifouling properties, and resistance to biological contamination. The design strategy presents a promising solution for manufacturing multifunctional materials with tailored features and intricate structures. These materials demonstrate strong self-cleaning and antifouling properties, suitable for use in harsh conditions, including applications like self-cleaning windows and optical sensor protection.
研究领域:
材料科学
·
海洋生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）