ACS Applied Polymer Materials
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2021
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IF 4.089
Hao Zhang,Yuenan Zhang,Ling Fu,Ozioma Udochukwu Akakuru,Zongbao Wang,Aiguo Wu,Yujie Zhang
Water pollution has been increasingly becoming a serious environmental and health challenge in recent years. This is compounded by the often coexisting oil pollution and heavy metal pollution. It is of great practical significance to develop materials that can simultaneously deal with these two kinds of water pollution problems. In this study, a simple and green approach is proposed for preparing matrix-free citric acid modified alginate-based aerogel membrane by simple sol spraying, chemical cross-linking, and freeze-drying methods. The aerogel membrane with dense upper and lower surfaces and a loose interlayer possesses the properties of superhydrophilicity and underwater superoleophobic and strong antiadhesion performances, and it can realize the separation of highly viscous miscible oil–water emulsions with a separation efficiency of over 99.5%, even in corrosive and high-salt environments. The membrane has shown strong stability during 3000 min of uninterrupted cross-flow filtration of emulsion, which reflects the good long-term separation performance of the membrane. The prepared membrane can also be used for the removal of various heavy metal ions from water under gravity, with a removal efficiency >99% and an adsorption capacity of about 240 mg/g for Pb2+. The modified membrane which features low cost, a simple and green preparation process, excellent oil–water separation, and heavy metal removal capabilities possesses great application potential in the treatment of polluted water.
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INDUSTRIAL CROPS AND PRODUCTS
·
2023
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IF 5.9
Huicheng Dou,Ying Zhang,Hao Zhang,Yanan Wang,Jiaxing Li,Hao Zhong,Xueqi Chen,Minghui Guo
Water pollution caused by crude oil spills poses significant environmental concerns. In this work, multi-walled carbon nanotubes (MWCNTs) were dispersed as the carbon network on the elastic wood sponge (WS) and then encapsulated by hydrophobic polydimethylsiloxane (PDMS) coating to form a crude oil adsorbent, PDMS@CNT-WS. It demonstrated an elasticity of up to 90% compressive strain, while the height retention remained at 97% even after 100 cycles at 50% compressive strain. The shape-memory properties and 148°hydrophobic angle of the material allowed it to be repeatedly used. This is the first material to utilize sunlight and microwave as dual stimuli to absorb and recover spilled crude oil. PDMS@CNT-WS absorbed crude oil floating on water within about 80 s under 1 sun illumination. After condensation, the material was heated within only 4 s in a microwave oven at 2450 MHz, and the crude oil in the interior could be recovered by simply squeezing the material. This new approach provided a source of energy conversion for crude oil adsorbents with thermal management capabilities to clean up crude oil spills.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Hao Yue,Ye Fu,Zhiguang Guo
Slippery liquid-infused porous surface (SLIPS) strategy has recently attracted significant attention in the field of foggy water collection. However, the surface on which the lubricant is injected is often unstable, losing control of fog capture and droplet movement. The 3D frame structure combined with the nano-needle-like structure produces a strong oil locking ability to provide more stable Slippery liquid-infused porous surface. In this work, copper myristate flower-like clusters were directly grown on the walls of porous copper foam wires by in situ reactions, resulting in a superhydrophobic skeleton directly, and a 3D skeleton of the injected lubricant was obtained after lubricant injection. The framework also features excellent droplet capture, droplet coalescent growth, and droplet removal, as well as significant anti-ice and anti-fouling properties. This work simplifies the preparation process and it is easy to meet the reaction conditions. The prepared lubricant injected skeleton has excellent atomized collection properties (98.7% higher than the original sample) and has the potential for mass fabrication. It provides a new idea for the efficient and rapid preparation of the liquid infusion fog collection structure.
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-15
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IF 17.694
Xia Neng,Jin Dongdong,Pan Chengfeng,Zhang Jiachen,Yang Zhengxin,Su Lin,Zhao Jinsheng,Wang Liu,Zhang Li
The geometric reconfigurations in three-dimensional morphable structures have a wide range of applications in flexible electronic devices and smart systems with unusual mechanical, acoustic, and thermal properties. However, achieving the highly controllable anisotropic transformation and dynamic regulation of architected materials crossing different scales remains challenging. Herein, we develop a magnetic regulation approach that provides an enabling technology to achieve the controllable transformation of morphable structures and unveil their dynamic modulation mechanism as well as potential applications. With buckling instability encoded heterogeneous magnetization profiles inside soft architected materials, spatially and temporally programmed magnetic inputs drive the formation of a variety of anisotropic morphological transformations and dynamic geometric reconfiguration. The introduction of magnetic stimulation could help to predetermine the buckling states of soft architected materials, and enable the formation of definite and controllable buckling states without prolonged magnetic stimulation input. The dynamic modulations can be exploited to build systems with switchable fluidic properties and are demonstrated to achieve capabilities of fluidic manipulation, selective particle trapping, sensitivity-enhanced biomedical analysis, and soft robotics. The work provides new insights to harness the programmable and dynamic morphological transformation of soft architected materials and promises benefits in microfluidics, programmable metamaterials, and biomedical applications.
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INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
·
2026
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IF 3.9
Yue Lu,Guifang Sun,Liangyu Wu,Xiangdong Liu,Yongping Chen
A tandem microfluidic device coupling flow-focusing and step emulsification is fabricated to generate compound droplets. • Four distinct flow regimes are experimentally identified, with two-step and one-step generation enabling highly monodisperse compound droplets ( C.V. < 5%). • We i , We m , and the distance between the upstream flow-focusing and downstream step-emulsification unit are identified as key factors governing droplet size, core-shell ratio, and flow regime transitions. • Flow regime maps and a predictive method are established to guide device design and operation, achieving prediction accuracy up to 82.01%. In this work, a tandem microfluidic device coupling flow-focusing and step emulsification was fabricated to generate compound droplets. Through systematic visualization experiments, four distinct flow regimes were identified, namely two-step compound droplet generation (TSCG), one-step compound droplet generation (OSCG), intermittent generation of multiple single droplets and one compound droplet (IGS&C), and two-step multi-core compound droplet generation (TSMCG). Furthermore, the hydrodynamic mechanisms underlying these flow regimes were elucidated. Both TSCG and OSCG exhibit robust compound droplet generation performance since the generation of the outer droplets is insensitive to flow rate variations, yielding highly monodisperse compound droplets with coefficient of variation ( C.V. ) below 5%. The OSCG dominated by interfacial tension is more favorable for producing the compound droplets with a larger core/shell ratio under higher frequency. Moreover, it produced compound droplets with higher monodispersity than other flow regimes. The influences of the Weber numbers ( We ) of the inner and the middle phases, as well as the distance between the flow-focusing junction and step emulsification nozzle on the compound droplet generation performance were examined and clarified. Regime maps were also provided to quantitatively identify the above four flow regimes depending on these influencing factors. Furthermore, a flow regime prediction method was proposed to predict the flow regime transitions, achieving a prediction accuracy of up to 82.01%. Download: Download high-res image (331KB) Download: Download full-size image
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2026
·Vol. 132
·期 10
·1033
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IF 3
Li Shang,Ding Ziheng,Xin Meiling,Ding Chaogang,Su Xuan,Zhang Donghe,Zhang Hongbin,Xu Jie,Xu Jinkai,Guo Bin
Marine biofouling presents a formidable challenge to the structure integrity and operation longevity of marine vessels, subsea engineering equipment and underwater exploratory systems. In response to this challenge, the bionic slippery lubricant-infused surfaces or coatings have emerged as a highly promising frontier for marine antifouling engineering. Consequently, in this paper, femtosecond laser quasi-athermal processing is employed to low-surface-energy PDMS elastomers, creating high-quality hierarchical micro/nanostructures with a near-superhydrophobicity (148.3 ± 0.8°) including microgrooves, micropillars, microprotrusions, nanopores and nanoparticles. Simultaneously, the trans-scale formation mechanism of this hierarchical micro/nanostructure is revealed in depth. Subsequent lubricant infusion yields slippery surfaces with ultra-low water sliding angle of 6.7 ± 1.4° that effectively suppress marine biofilm adhesion under static and dynamic conditions. Systematical characterizations and assessments demonstrate a pronounced synergistic effect between high-aspect-ratio laser-induced micro/nanostructures and silicone oil. However, the long-term stability and service-stage evolution of lubricant-infused surfaces under marine fouling conditions remain insufficiently understood. For this, the stability tests of lubricant layer coupled with shear simulation conditions reveal a three-stage evolution law of lubricant-infused surfaces in simulated marine service environment, viz. full oil-infused, low oil-depleted and conformal oil-coated stages. These findings not only advance femtosecond laser trans-scale micro/nanofabrication for functional surface/interfaces engineering, but also provide a solid experimental and technology basis for developing next-generation long-term, high-performance and environment-friendly lubricant-infused surfaces. Graphical
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Advanced Healthcare Materials
·
2023
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IF 10
Minghua Deng,Huan Yang,Huibin Zhang,Chaoqian Li,Jingqiu Chen,Wei Tang,Xianbao Wang,Zhaowei Chen,Jinhua Li
Prostate-specific antigen (PSA) is the common serum-relevant biomarker for early prostate cancer (PCa) detection in clinical diagnosis. However, it is difficult to accurately diagnose PCa in the early stage due to the low specificity of PSA. Herein, a new solution-gated graphene field transistor (SGGT) biosensor with dual-gate for dual-biomarker detection is designed. The sensing mechanism is that the designed aptamers immobilized on the surface of the gate electrodes can capture PSA and sarcosine (SAR) biomolecules and induce the capacitance changes of the electric double layers of SGGT. The limit of detections of PSA and SAR biomarkers can reach 0.01 fg mL −1 , which is three-to-four orders of magnitude lower than previously reported assays. The detection time of PSA and SAR is ≈4.5 and ≈13 min, which is significantly faster than the detection time (1–2 h) of conventional methods. The clinical serum samples testing demonstrates that the biosensor can distinguish the PCa patients from the control group and the diagnosis accuracy can reach 100%. The SGGT biosensor can be integrated into the portable platform and the diagnostic results can directly display on the smartphone/Pad. Therefore, the integrated portable platform of the biosensor can distinguish cancer types through the dual-biomarker detection.
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ADVANCED FUNCTIONAL MATERIALS
·
2023
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IF 19
Tianxiang Du,Penghui Zhao,Yitong Liu,Ning Ma,Xufeng Dong,Hao Huang
Magnetorheological (MR) fluids are magnetic responsive smart materials that are widely used in real-time damping adjustment devices. However, a major challenge for MR fluids is balancing the constraints relationship among various key performances. This study demonstrates that by utilizing home-made high saturation magnetization (208.0 emu g −1 ) nanoparticles as the second component in the preparation of cross-scale bidisperse MR fluids, the shortcomings of monodisperse micron particles performance can be compensated, effectively balancing the relationship between various performances. This is attributed to the fact that the addition of nanoparticles enhances the density of chain structures under an applied magnetic field, while reducing the overall particle density without a magnetic field. By replacing part of micron particles with nanoparticles, the phenomenon of significant increase in zero-field viscosity caused by the direct introduction of nanoparticles is avoided. The optimal content of nanoparticles in MR fluids is preliminarily explored, and the results indicate that Micro-Nano bidisperse MR fluids exhibit a high dynamic yield strength (58.3 kPa when 436 kA m −1 ), excellent sedimentation stability (82.6% when 7 days), suitable zero-field viscosity (1.25 Pa s when 100 s −1 ), and ideal reversibility. Most importantly, the simple preparation method adds significant engineering application value to these MR fluids.
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JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2023
·
IF 2.3
Liu Yurong,Zhang Rui,Jing Hongling,Yu Daheng,Pan Renming,Chen Ruiyu
The macroscopic and microscopic surface morphology, products, kinetics, and reaction mechanism of one typical aero-engine material 0Cr18Ni9 in the cases of high-temperature oxidation and hot corrosion by a novel superhydrophobic and oleophobic ultrafine dry powder extinguishing agent (SHOU DPEA) are studied in a simulated aircraft engine compartment working environment. The results demonstrate that the oxidation and corrosion products both contain FeCr 2 O 4 , Fe 2 O 3 , and Fe 3 O 4 . However, the presence of SHOU DPEA accelerates the corrosion within the alloy. The 0Cr18Ni9 substrate shows a L-shaped segregation phenomenon and a chromium-poor layer. Furthermore, the oxidation and corrosion kinetic curves of 0Cr18Ni9 are both parabolic. In particular, the high-temperature oxidation behavior of 0Cr18Ni9 can be divided into two stages: a rapid oxidation stage (0-96 hours) and an oxidation equilibrium stage (96-192 hours), and the hot corrosion process can be divided into two stages: an initial slow incubation stage from 0 to 48 hours, and an accelerated corrosion stage from 48 to 192 hours. Additionally, the chemical reaction mechanisms for oxidation/corrosion are illustrated. Graphical Abstract
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Changgeng Li,Huiqi Jin,Minjie Hou,Xu Guo,Tianyuan Xiao,Xinyu Cao,Wenchao Jia,Pedram Fatehi,Haiqiang Shi
The main purpose of this paper was to systematically evaluate the effect of lignin, which was fractioned by green solvents into different molecular weights and used as polyol in the production of polyurethane foams (PUF). The results indicated that the foams prepared with the lower molecular weight lignin had uniform and complete pore structure and improved the mechanical strength . However, the higher molecular weight fraction lignin improved the density and thermal stability of the foam more significantly at the expense of inferior mechanical strength and pore structure deficiency. When the substitution degree of lignin in the PUF was 2 %–30 %, 99.13 % of the lowest molecular weight lignin was participated in the reaction to produce PUF, which improved the elongation at break (Eb) and tensile strength (Ts) of PUF to 834 % and 0.90 MPa, respectively. Also, thermal stability and the amount of unreacted lignin in PUF were increased at a higher substitution degree of lignin in PUF.
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WATER RESEARCH
·
2023
·
IF 12.8
Jian Yu,Juping You,Piet N.L. Lens,Lichao Lu,Yaxue He,Zhenyi Ji,Jianmeng Chen,Zhuowei Cheng,Dongzhi Chen
ABSTRACT Hydrophobic volatile organic sulfur compounds (VOSCs) are frequently found during sewage treatment, and their effective management is crucial for reducing malodorous complaints. Microbial fuel cells (MFC) are effective for both VOSCs abatement and energy recovery. However, the performance of MFC on VOSCs remains limited by the mass transfer efficiency of MFC in aqueous media. Inspired by two-phase partitioning biotechnology, silicone oil was introduced for the first time into MFC as a non-aqueous phase (NAP) medium to construct two-phase partitioning microbial fuel cell (TPPMFC) and augment the mass transfer of target VOSCs of propanethiol (PT) in the liquid phase. The PT removal efficiency within 32 h increased by 11–20% compared with that of single-phase MFC, and the coulombic efficiency of TPPMFC (11.01%) was 4.32–2.68 times that of single-phase MFC owing to the fact that highly active desulfurization and thiol-degrading bacteria (e.g., Pseudomonas, Achromobacter ) were attached to the silicone oil surface, whereas sulfur-oxidizing bacteria (e.g., Thiobacillus, Commonas, Ottowia ) were dominant on the anodic biofilm. The outer membrane cytochrome-c content and NADH dehydrogenase activity improved by 4.15 and 3.36 times in the TPPMFC, respectively. The results of metagenomics by KEGG and COG confirmed that the metabolism of PT in TPPMFC was comprehensive, and that the addition of a NAP upregulates the expression of genes related to sulfur metabolism, energy generation, and amino acid synthesis. This finding indicates that the NAP assisted bioelectrochemical systems would be promising to solve mass-transfer restrictions in low solubility contaminates removal.
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CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Donghai Yang,Huayao Sun,Mofan Li,Qing Li,Xuedong Gao,Chaohui Chen,Limin He
Under high-strength electric fields, partial coalescence may occur, thus producing fine secondary droplets, which are undesirable for separating water from oil. In this study, experimental and numerical methods are employed to investigate the coalescence behavior under a DC electric field to comprehensively understand the effect of electric field strength ( E ) and droplet diameter ( D ) on coalescence. The Level-set method is employed to capture the moving interface, and the numerical data are validated through experimental tests. The results reveal the easy formation of secondary droplets with increasing E and D values. In particular, the electric field strength suppresses the expansion of the liquid bridge and hinders the vertical collapse of the droplets. The distortion of the electric field at the liquid bridge and the polarized charge both increase with E , thus resulting in stronger electric field repulsion. Moreover, the enhancement in D significantly affects the shrinkage of the liquid bridge and prevents the vertical collapse of the droplet. The pressure gradient at the liquid bridge from the outside to inside decreases as a function of D , thereby inhibiting the contraction speed. Furthermore, the number of polarized charges concentrated on the top of the droplet increases, thus resulting in an enhanced electric field tension. The results obtained herein can potentially act as guide for the design and optimization of electric dehydrators.
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