COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Hengyang Mao,Kai Qiu,Shouyong Zhou,Jiaming Wang,Mengting Li,Shuo Shi,Meisheng Li,Ailian Xue,Yijiang Zhao,Qi Zhang,Zhentao Wu
It is highly desired to develop an efficient and stable approach to recover water from oil-water mixtures. In this work, we reported the facile fabrication of superhydrophilic and underwater superoleophobic membranes by coating a layer of Anthurium andraeanum-like attapulgite (ARATP) on commercially available wire meshes via sintering. The ARATP was obtained through anchoring nano-Fe 3 O 4 on attapulgite (ATP), and its micro nano-structures can be adjusted by varying Fe 3 O 4 content. Molecular dynamic simulations revealed the benefits of Fe 3 O 4 in constructing superwetting coating layer with oil droplet repulsion larger than 227 KJ·mol −1 . The membrane exhibited underwater superoleophobicity (with underwater oil contact angle at 157°) and was proven to treat various oil-water mixtures effectively (with a water permeation flux above 3249 L·m −2 ·h −1 and oil content in filtrate less than 2 mg·L −1 ). Furthermore, the chemical, mechanical stability and easy-cleaning property of the as-prepared membrane was demonstrated by different tests.
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Advanced Science
·
2022
·Vol. 9
·期 21
·2201341
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IF 17.521
Yijing Yang,Rong Chen,Xun Zhu,Dingding Ye,Yang Yang,Wei Li,Dongliang Li,Haonan Li,Qiang Liao
Flexibly and precisely manipulating 3D droplet transportation is a fundamental challenge for broad implications in diagnostics, drug delivery, bioengineering, etc. Herein, a light method is developed for manipulating a droplet to make it behave like a submarine. This light method enables flexible 3D transportation, stable suspension, and floating of a droplet, which can be freely altered. It is demonstrated that the localized photothermal effect induced thermocapillary flow in the water droplet/oil phase is responsible for energizing and manipulating the droplet. With such remarkable motility, the light-fueled submarine-like droplet successfully realizes various functions such as the acid-base detection, particle capture and transportation, and target crystal collection, dissolution and transportation. It is demonstrated that the light-fueled submarine-like droplet shows promising perspective for long-sought precise droplet manipulation in various applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Wei Chen,Binbin Yu,Zhiyou Wei,Sheng Mao,Tao Li
Hypothesis Although a raspberry-like configuration has been long observed in biological processes (e.g., the intimate association between Cajal bodies and B-snurposomes), studies on this morphology are very limited. Raspberry-like droplets created with multiple immiscible liquids are expected to provides an ideal model for such structures in biological systems, including their possible formation mechanism, phase behaviors, and coalescence dynamics. Experiments & Simulations Using three liquid phases, one surfactant and some colloidal particles, raspberry-like droplets containing one large central droplet and multiple protrusions embedded on its surface were successfully created. Confocal microscopy studies were carried out to track their formation and coalescence dynamics. A 2D phase-field model was applied to test the influence of the protrusions in the system. Findings The formation of this raspberry-like morphology involves a partial inversion process, which was predicted by Friberg et al. with numerical simulations but has never been demonstrated experimentally. A two-step coalescence was revealed, where the protrusions merge first and create a capillary bridge, which drives the droplets to coalesce. Increasing the viscosity of the continuous phase can help to prevent the destabilization. These fundamental features of raspberry-like droplets represent an important step toward producing multi-liquid materials with unique functionality, and can potentially illuminate some biological systems and processes.
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PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
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2022
·Vol. 219
·期 7
·2100759
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IF 2.17
Miao Xu,Kaili Zhang,Yanli Yang,Tiexin Cheng,Guangdong Zhou
Composite additives for enhancing the yield stress, sedimentation stability, and long-term reversibility of bidisperse magnetorheological fluids (MRFs) are reported herein. The design and introduction of magnetic Fe 3 O 4 /halloysite-nanotube (HNT) composite additives to carbonyl-iron (CI)-based MRFs are described, and the effects of Fe 3 O 4 /HNT addition on the MRF behavior are elucidated. The rheological, viscoelastic, and cyclic reversibility analyses of the bidisperse Fe 3 O 4 /HNT-CI MRFs indicate that the MR performance increases and subsequently decreases with the increasing content of the Fe 3 O 4 /HNTs. The MRF containing 1.0 wt% Fe 3 O 4 /HNTs shows optimal MR properties and long-term reversibility. Under a magnetic field, the 1.0 wt% Fe 3 O 4 /HNTs are embedded in the interstices of the magnetic chains, enhancing the magnetic dipole–dipole interactions between the particles, strengthening the rigidity of the magnetic chains, and increasing the yield stress of the MRF. The Fe 3 O 4 /HNTs are adsorbed on the surfaces of the CI particles in the absence of a magnetic field, occupying the free space between the CI particles and forming support structures, which prevents aggregation and improves sedimentation stability. Moreover, the designed MRFs respond quickly to magnetic field switching and exhibit enhanced long-term reversibility.
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Advanced Materials Interfaces
·
2022
·Vol. 9
·期 10
·2101968
·
IF 6.389
Yuan Yuan,Huiying Xiang,Guoyong Liu,Liang Wang,Huilin Liu,Ruijin Liao
Icing accretion on aircraft surfaces has threatened the flight safety so far. Slippery liquid infused porous surface (SLIPS) is an emerging anti-icing method. Many studies have found that SLIPS has self-repairing phenomena. However, there is almost no systematic research on the number of self-repairs in service, which determines the durability of anti-icing. Herein, the self-repairing performance of SLIPS is studied through icing-repairing and abrasion-repairing cycles. A stable and smooth lubricating layer of SLIPS is obtained by infiltrating a silanized porous surface with silicone oil, and the porous surface is constructed by anodization. The SLIPS exhibits low ice-adhesion strength even after frosting and the ice accumulation on the SLIPS can slide off under gravity. The self-repairing properties are evaluated under the condition that the ice-adhesion strength does not exceed 100 kPa. The SLIPS can withstand ≈150 icing/deicing cycles via 5 times of 1 h self-repair and 100 abrasion cycles via 4 times of 1 h self-repair. The results show that the SLIPS has durable anti-icing properties. Therefore, the prepared SLIPS are promising in the field of durable aircraft anti-icing materials.
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JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2022
·Vol. 30
·期 7
·2774-2784
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IF 4.705
Yan Zhuofeng,Zhu Kaixiao,Li Xiangqi,Wu Xiao
Bacterial cellulose (BC) aerogel has great potential in treating oil spill and organic pollutant. However, its inherent hydrophilicity and poor rigidity limit its practical application and recyclability. In this study, elastically compressible and high oil-absorbing aerogels were developed by freeze-drying aqueous suspensions with appropriate BC concentrations, followed by a chemical vapor deposition of methyltrimethoxysilane with ammonia as catalyst. The modified aerogel shows high water contact angle of 142° and enhanced compression resistance. The effect of BC concentration on the absorption capacity and recyclability of aerogel has been investigated. The results show that the aerogel prepared with 0.3 wt% BC exhibits simultaneously high absorption capacity (121.8–284.1 g/g) and excellent recyclability. Futhermore, the aerogel could also separate chloroform-water mixture by gravity-driven filtration, giving the separation efficiency of 96.7%. Therefore, this economical green aerogel provides a feasible strategy for solving oil leakage in industry.
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LANGMUIR
·
2023
·
IF 3.9
Shuwei Lv,Xiaodong Yang,Qiao Liu,Chunyu Mao,Xianli Liu,Ying Zhai,Zhuojuan Yang
Slippery surfaces with outstanding slippery performances have shown application prospects in various fields, including anti-icing, antifouling, droplet transportation, and fog collection. However, practical application of the existing slippery surfaces is limited by lubricating oil loss, low water-slippery ability, low surface robustness, complex processes, and high costs. To overcome these limitations, we propose a facile, low-cost method to create a solid-like slippery Al surface (SSS-Al) by mixing hydrophobic nano-ceramic coating, silicone oil, and nano-SiO2, which shows excellent comprehensive performance. The SSS-Al shows exceptional water-slippery ability with a sliding angle of 5° and antifouling ability. Durability and chemical stability tests confirm the high surface durability and chemical stability of SSS-Al. Furthermore, SSS-Al exhibits anti-icing performance, fog collection ability, and electrochemical corrosion resistance, as well as demonstrates remarkable application prospects in important fields such as aerospace and shipbuilding.
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CHEMICAL PAPERS
·
2023
·Vol. 77
·期 10
·5873-5880
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IF 2.2
Zhou Jialin,Fei Jiayu,Zeng Cheng,Quan Hong Hua,Li Ming
Stably retaining the water-soluble molybdate within electrodes is of great significance in phosphate analysis. This study fabricated an [Omim] 6 Mo 7 O 24 carbon paste electrode (OCPE), which was able to effectively retain molybdate in the aqueous solution. The electrochemistry of phosphate at the surface of the OCPE was studied using cyclic voltammetry (CV). The voltammograms showed three reversible redox peaks corresponding to the redox of Mo(VI/V) as well as several irreversible peaks involving the formation of hydrogen molybdenum bronze. The currents of all three reversible redox peaks linearly varied versus phosphate concentrations in 0.1 mol·L −1 H 2 SO 4 -KCl. After optimizing the mass ratio of the [Omim] 6 Mo 7 O 24 and carbon powder, peak C6 shows a wide linear range (1.0 × 10 –2 –1.0 × 10 –7 mol·L −1 ; R 2 = 0.9970) with a sensitivity of 5.3 (± 0.1) μA/μM. The limit of detection (LOD = 3 σ /s) was 8.5 × 10 –8 mol·L −1 . Interferences from common anions, silicate, and glyphosate on phosphate analysis were also investigated. The proposed sensing method was successfully applied to the determination of phosphate in tap water, whose results were verified with ion chromatography (IC).
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DRUG DEVELOPMENT AND INDUSTRIAL PHARMACY
·
2023
·
IF 3.4
Yizhe Hou,Xi Wang,Zhiyong Zhang,Jiaheng Wu,Xiang Cai,Pian Li,Zheng Li,Wenlong Li
Objective The drooping process of the Xuesaitong dropping pills (XDPs) was optimized based on quality by design concept. Meanwhile, a machine vision (MV) technology was creatively introduced in this study to predict the critical quality attributes (CQAs) rapidly and accurately.Significance This study improves the understanding of dropping process, and has reference value for the guidance of pharmaceutical process research and industrial production.Methods The study mainly consisted of three stages: the first stage involved the prediction model to establish and evaluate the CQAs, and the second stage involved assessing the quantitative relationships between critical process parameters (CPPs) and CQAs by the mathematical models that were established through the Box–Behnken experimental design. Finally, a probability-based design space for the dropping process was calculated and verified according to the qualification criteria of each quality attribute.Results The results show that the prediction accuracy of the random forest (RF) model was high and met the analysis requirements, and the CQAs of dropping pills can meet the standard by running in the design space.Conclusion The MV technology developed in this study can be applied to the optimization process of the XDPs. In addition, the operation in the design space can not only ensure the quality of XDPs to meet the criteria, but also help to improve the consistency of XDPs.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Dan-Dan Hu,Yi-Dong Li,Yunxuan Weng,Hua-Qiao Peng,Jian-Bing Zeng
Currently reported biobased superwetting cotton fabrics (CF) for wastewater purification were limited because they can only separate oil/water mixtures but cannot remove other pollutants such as dyes from wastewater. In this study, we reported a superhydrophilic and underwater superoleophobic cotton fabric (SUSCF) which was fabricated via a facile two-step method, i.e., dip-coating in poly(sodium 4-styrenesulfonate) (PSS) wrapped carbon nanotube (CNT) dispersion and subsequent in-situ deposition of polydopamine (PDA). The deposited PDA particles and coated CNT endowed CF with superhydrophilicity and underwater superoleophobicity by improving surface roughness and hydrophilicity. The obtained SUSCF showed an underwater oil contact angle of 160°, which made it an attractive water-removing material for oil/water separation with separation efficiency and water flux of higher than 99.8% and 10,834 L m -2 h −1 , respectively. The combination of CNT, PSS, and PDA endowed the SUSCF with outstanding cationic dye adsorption capacity, especially leading to a maximum removal ratio of 97% toward methylene blue. In addition, the SUSCF exhibited excellent stability to survive after exposure to sandpaper abrasion, boiling water, organic solvents, salt solution, and acidic/alkali erosion, due to the strong hydrogen bonds and mussel-inspired adhesion between coated components and fabric surface. The stable biobased underwater superoleophobic cotton fabric with integrated excellent oil/water separation performance and dye adsorption capacity shows great potential in wastewater purification even under some harsh conditions.
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Materials Today Physics
·
2023
·
IF 11.5
Huiying Xiang,Yuan Yuan,Tao Zhu,Xu Dai,Cheng Zhang,Yu Gai,Ruijin Liao
In recent years, the lubricant depletion in slippery lubricant-infused porous surface (SLIPS) has been widely concerned, which limits its application in anti-icing. The lubricant stability is determined by three main factors including lubricant storage, depletion, and self-healing rate after depletion. However, many studies only consider one or two factors and there is a lack of systematic research on the anti-icing durability of the improved SLIPS. Herein, considering the “storage-depletion-healing” of the lubricant, a dendritic porous structure was fabricated, and the pore depth ratio and surface porosity were optimized. Additionally, the anti-icing durability of the dendritic slippery surface (Y-SLIPS) was investigated. The results show that the optimal pore depth ratio (upper pore to lower pore) and surface porosity are 1:2 and 66%, respectively. Compared to the traditional slippery surface (I-SLIPS), the Y-SLIPS has better anti-icing durability in frost and icing environment. The Y-SLIPS exceeds 20 kPa at the 140th frosting/defrosting cycle, while the I-SLIPS reaches this value at the 100th cycle. When maintaining extremely low ice-adhesion strength, the Y-SLIPS can withstand 190 icing/deicing cycles, far more than that of the I-SLIPS. The optimal dendritic porous structure further improves the anti-icing durability of the slippery surfaces, which lays the foundation for its anti-icing application.
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Small Methods
·
2021
·Vol. 5
·期 12
·2100969
·
IF 14.188
Quan Liu,Guodong Yu,Chongyu Zhu,Bo Peng,Ruohan Li,Tao Yi,Yanlei Yu
Manipulating droplets by light in microscale allows precise control of microfluidics, liquid delivery, micromachines, and so on. Among these applications, microfluidic technology is of particular interest for miniaturization of the portable analysis systems, which require the integration of various liquid operations in one device. Here, a photodeformable microfluidic platform is constructed by combining Laplace pressure and capillary condensation to integrate the transportation, fusion, separation, and mixing of liquid slugs in one chip. The Laplace pressure, attributed to the photodeformation of the liquid crystal polymers, is generated to propel the slug. The capillary condensation is introduced by the delicate design of the fluid channels, allowing the fusion and separation of slugs without any connected microvalves. Catalytic oxidation reaction and protein detection processes are realized in the platform, which are amenable to a variety of miniaturized bio-medical applications, such as portable analysis and point of care testing.
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