COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Yu Chen,Shengkai Hu,Zhengxuan Wang,Yi Zhao,Yifan Chen,Xiaofeng Qiu,Hao Yang,Haizhen Sun
Alginate hydrogels are widely studied for biomedical applications due to their biocompatibility and tunable properties, yet conventional microsphere fabrication faces challenges in structural precision, process complexity, and flexibility. This study addresses the critical challenge of precise structural control in alginate microsphere fabrication by developing an innovative one-step microfluidic strategy based on multiphase shear-induced emulsification/internal gelation. Using a phase-sequence inversion technique in a coaxial capillary device, we achieve selective generation of solid-core or capsule-type architectures. Through synergistic optimization of flow parameters, concentrations, and viscosities, we demonstrate precise regulation of microsphere diameter (500–950 μm) and morphology (aspect ratio 0.95–1.05). Systematic investigations reveal distinct volumetric shrinkage behaviors during thermal curing, with capsule-type microspheres exhibiting accelerated contraction kinetics. The integration of TiO₂/Fe₃O₄ nanoparticles into capsule structures enables complete photocatalytic degradation of methylene blue, validating environmental remediation utility. This work establishes a scalable platform for tunable hydrogel carrier fabrication, advancing microfluidic droplet engineering fundamentals for biomedicine and environmental applications.
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Advanced Materials Interfaces
·
2025
·
IF 4.4
Tao Zhu,Yuan Yuan,Xingde Wei,Xujiang Hua,Xu Dai,Huiying Xiang,Linbo Song,Ruijin Liao
Ice accretion on wind turbine blades severely impacts the power generation efficiency, equipment lifespan, and safe operation of wind farms. Low-interfacial toughness materials have demonstrated potential for large-scale deicing under controlled laboratory conditions. However, their anti-icing and deicing performance in complex and harsh natural fields is rarely studied. Herein, low-interfacial toughness PDMS/SiO 2 coatings are prepared on aluminum plates. Field tests for anti-icing, icephobic, and large-scale deicing are conducted in the high-altitude regions of Southwest China. Fortunately, the PDMS/SiO 2 coating exhibits exceptional anti-icing and icephobic properties. The coating effectively delays the freezing of water droplets and natural ice accretion, significantly reducing icing weight and ice adhesion strength. During natural ice-covering processes, the ultra-low ice adhesion of the PDMS/SiO 2 coating aids in efficient ice shedding through wind and gravity and ensures rapid melting post-icing. Additionally, the PDMS/SiO 2 coating excels in large-scale deicing performance. The constant deicing force, governed by low interfacial toughness, provides robust assurance for efficient large-scale deicing of ice layers of varying sizes under gravity. Moreover, the coating demonstrates stable durability, retaining excellent deicing capabilities during icing/deicing cycles, UV radiation, and high-temperature aging tests. This study lays an experimental foundation for the further research and application of low-interfacial toughness materials.
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Small
·
2025
·
IF 12.1
Anhui Yu,Zhiguang Guo
The directional transport and precise control of droplets and bubbles are crucial for future applications, but remain challenging due to complex fluid dynamics and application limits. In light of existing research on droplet manipulation, a MnO 2 /carbon microsphere (MnO 2 /Cs) covalently grafted lubricant-infused slippery surface (SPM) is designed for the manipulation of droplets and bubbles. The structure and morphology of the MnO 2 /Cs are examined using X-ray diffraction (XRD) and field-emission scanning electron microscopy (FESEM), and the elemental composition and chemical bonds of the compounds are characterized by X-ray photoelectron spectroscopy (XPS), Raman spectra and Fourier transform infrared spectrometer (FTIR). The SPM with a sliding angle as low as 3° is prepared. On the SPM, the rapid transportation and precise control of small droplets can be achieved, with the transportation speed of 5 µL droplets reaching 1 mm s −1 and the round-trip control of droplets also being feasible. The surface is capable of controlling the speed of a 100 µL droplet with a precision of 0.49 mm s −1 , while a 50 µL droplet can be directed with a load of 1 mg. Moreover, bubbles with a volume of 5 to 20 µL can also be transported.
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IEEE SENSORS JOURNAL
·
2025
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IF 4.5
Chungang Wu,Xiaoming Chen,Ziang Bai,Qihang Ye,Bo Han,Maoqing Chen,Yingxuan Liu,Shuhua Ma,Yong Zhao
Microfluidics plays a significant role in various fields, including material synthesis, drug delivery, and disease diagnosis, and the flow velocity has a critical effect on the products. However, there is a lack of approaches for monitoring the flow velocity in the microchannel. To address this, we propose a novel fiber-optic flowmeter based on a flexible Fabry-Perot (F-P) cavity for online and non-invasive monitoring of products from the microfluidic devices. The flexible F-P cavity is constructed with a fiber-optic probe and gold-coated polydimethylsiloxane (PDMS) film, which can be easily integrated with versatile microfluidic devices through oxygen plasma bonding. Depending on the numerical investigation of film deformation under various film and fluid parameters, we experimentally characterize the sensitivity, reversibility, stability, and repeatability of this flowmeter. Then, the adaptability of the flowmeter is demonstrated by monitoring the flow velocity of seawater and sucrose solution. Moreover, we integrate this flowmeter with multiple microfluidic devices to verify the integration performance. Finally, we successfully achieve online and non-invasive monitoring of mixing efficiency, droplet diameter, and microalgae separation efficiency in the integrated microfluidic devices. This flowmeter can monitor the products from the microfluidic devices for disease diagnosis and drug delivery, with the advantages of good adaptability and easy integration.
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SURFACE & COATINGS TECHNOLOGY
·
2025
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IF 6.1
Jie Qin,Zhihan Zhang,Wenhui Yao,Liang Wu,Long Li,Ke Wang,Yuan Yuan,Zhihui Xie,Yuansheng Yang,Viswanathan S. Saji,Fusheng Pan
Conventional Mg Al layered double hydroxide (LDH) monolayers offer insufficient space to accommodate the lubricants required for slippery liquid-infused porous surfaces (SLIPSs). Therefore, Mg-MOF-74 was deposited onto the as-prepared Mg Al LDH, to construct an LDH/MOF composite-layered structure, which increased the storage capacity of lubricants and imparted AZ31 Mg alloy with enhanced anti-corrosion and self-healing performance. Notably, the as-synthesized Mg-MOF-74 featured abundant open metal sites, facilitating the loading of 8-hydroxyquinoline (8-HQ) corrosion inhibitor. Specifically, 8-HQ could be loaded both in the interlayers of Mg Al LDH and open Mg sites of Mg-MOF-74. Due to the effective incorporation of 8-HQ and better insulation of a thicker lubricant layer, the LDH/MOF composite-layered SLIPS exhibited the best corrosion resistance with a corrosion current density of 5.13 × 10 −10 A·cm −2 . Furthermore, its self-healing performance was assessed by scanning vibration electrode technique and subsequent electrochemical measurements. Results indicated that the artificial scratch on the composite coating was fully repaired after 24 h of immersion in 3.5 wt% NaCl, with its impedance modulus (1.75 × 10 8 Ω·cm 2 ) restored to the same order of magnitude as that of the non-scratched specimen. This was primarily attributed to the physical self-healing of lubricants and chemical self-healing via the “gradual release & layer-by-layer deposition” of Mg 2+ and 8-HQ. Thus, the as-fabricated composite SLIPS coating demonstrates significant industrial application potential.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Jia Ming Zhang,Xiying Li,Qinglei Ji,Sigurdur T. Thoroddsen,Huiling Duan
Creating well-controlled high-viscosity small droplets is imperative for material fabrication and bio-printing, posing significant challenges. This research successfully addresses these challenges by employing a novel tip mode within a 3D Asymmetric Hydrodynamic Focusing (3D-AHF) system to produce droplets with a maximum viscosity of 300 mPa⋅s and a minimum size of 10 μm (1/5 feature size). In this newfound tip mode, the viscous dispersed liquid is partially pinned at the tube outlet, forming a stable tip markedly smaller than the tube outlet, facilitating the emission of small droplets. The weak dependency on dispersed liquid viscosity for tip formation and droplet generation is systematically examined through theoretical and experimental investigations. Developed theoretical models, elucidating the characteristics of this new tip mode and predicting droplet sizes, are experimentally validated. Demonstrations of using the 3D-AHF system as templates for fabricating elastic microspheres and highly sensitive microsphere-type sensors underscore its simplicity and efficacy for applications relying on small and viscous droplets.
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Petroleum Science
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2025
·
IF 6.1
Yu Wu,Yan-Cheng Zheng,Jian Mu,Fu-Chang You,Zheng-Yu Li
In response to the overlooked influence of precursor molecular structure on interfacial performance in the application of amphiphilic carbon dots (CDs) for enhanced oil recovery (EOR), this study synthesized nitrogen-doped CDs (NCDs, FG and TA series) using biomass-derived precursors via carbonization, amidation, quaternization, and alkylation. The relationships between precursor structure, surface functionality, interfacial behavior, and oil displacement performance were systematically investigated. TA-derived NCDs exhibited higher surface polarity and amphiphilicity due to abundant carboxyl groups, while increasing alkyl chain length enhanced hydrophobicity and suppressed surface defects. TA-NCDs-L16 showed the best interfacial properties, with a critical micelle concentration (CMC) of 0.104 g/L, γ CMC of 24.71 mN/m, and zeta potential of +67.80 mV. Under NaCl concentrations ranging from 0 to 12 wt%, the oil–water interfacial tension decreased to a minimum of 0.00151 mN/m, and the contact angle dropped to 16.3°, indicating excellent salt tolerance and wettability reversal capability. In low-permeability core flooding tests, TA-NCDs-L16 achieved a significantly enhanced final oil recovery of 60.42%, with a 27.26% increase in recovery and a 38.71% reduction in injection pressure. The improved EOR performance was attributed to ultra-low interfacial tension, the formation of high-density polar adsorption layers, and nanoscale size effects that enabled efficient pore-throat penetration and fluid redistribution, thereby facilitating the detachment and mobilization of residual oil. In high-salinity formation water containing Ca 2+ /Mg 2+ and under elevated temperatures (50–90 °C), further evaluation confirmed that the amphiphilic NCDs maintained strong interfacial activity and sustained wettability reversal. TA-NCDs-L16 retained an ultra-low interfacial tension (∼0.002 mN/m) and stable wettability regulation even after 240 h of thermal aging at 80 °C, while core flooding still exhibited significant reductions in injection pressure and enhancements in oil recovery. This study clarifies the correlation among precursor structure, functional group configuration, interfacial behavior, and oil displacement efficiency, providing theoretical guidance and material design concepts for the development of carbon-based amphiphilic nanofluids in low-permeability reservoir applications.
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FOOD RESEARCH INTERNATIONAL
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2025
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IF 8
Yun Li,Jinhui Wang,Mingyu Zhao,Cailin Kong,Jianhui Xiao,Jin Tu,Liya Niu
The co-fermentation effect of adding taro-based yogurt strengthened the gluten network of frozen part-baked bread (FPBB). The underlying mechanisms were systematically investigated in terms of strain screening, dough stability, gluten structure and starch retrogradation behavior. Among the five lactic acid bacteria evaluated, taro-based yogurt fermented by Lactobacillus bulgaricus (LBF) was identified as the optimal improver, because it could provide higher fermentation intensity, acidification effect and water-holding capacity for the dough. LBF addition promoted the transformation of α-helix and β-sheet structures into β-turns, which softened the dough, increasing its extensibility and gas retention capacity, particularly at 10% LBF supplementation. The strong gluten network provided FPBB with excellent freezing performance, as confirmed by changes in microstructure, protein secondary structure, and starch short-range order after freezing for 28 days. LBF significantly reduced the enthalpy ( ΔH ) by 20.94% ∼ 26.99%. The water migration rate decreased from 11.84 to 6.58 days, and the crystallization rate was only 0.06 days.
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JOURNAL OF THE TEXTILE INSTITUTE
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2025
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IF 1.5
Jiahua Gu,Yi Lu,Shiyi Liu,Xiantao Zhang,Yinsong Hu,Yingjun Gao,Jian Wang,Feichao Zhu,Zhuanyong Zou,Yinjiang Zhang
Although numerous studies have been reported on the hydrophobic finishing of textile materials using polysiloxanes, research on the underlying coating finishing processes and mechanisms remains limited. Additionally, most approaches rely on nano-particles or plasma etching to increase surface roughness, often neglecting the inherent rough structure of textile materials. In this study, Box-Behnken design response surface methodology (BBD-RSM) was employed to design the experimental scheme and construct mathematical equations based on the experimental results. Then, the interaction effects of process parameters, including polydimethylsiloxane (PDMS) concentration, heat treatment temperature, and time, on hydrophobicity and mechanical properties of spunlace nonwoven materials were predicted and analyzed. When either PDMS concentration or treatment temperature is fixed, the contact angle (CA) of the material initially increases and then decreases with time. The optimal CA is observed after 8 h of heat treatment. The breaking strength of the material decreases gradually with increasing temperature. However, at a certain temperature, it initially increases and then decreases with increasing PDMS concentration, reaching a maximum at about 2 wt%. The elongation at break of the material exhibits better with high PDMS concentration and low treatment temperature or time, as well as with low PDMS concentration and higher treatment temperature or duration. Furthermore, the microscopic morphology and CA of materials modified were examined with different PDMS concentrations, combining wetting theories to further explore the hydrophobic effects of fiber assemblies. The high CA of PDMS-modified fiber assemblies is mainly attributed to the combined effects of PDMS, the inherent roughness of fibers, and the fiber assemblies.
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Energy Sources Part A-Recovery Utilization and Environmental Effects
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2025
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IF 2.2
Liang Tong,Qingfen Ma,Jingru Li,Zhongye Wu,Hui Lu,Xuejin Liu,Chengpeng Wang,Shenghui Wang
Recent advancements in superhydrophobic surfaces have demonstrated improvements in condensation efficiency by promoting droplet detachment. However, the effectiveness of these surfaces in the low-temperature and low-pressure conditions typical of ocean thermal energy conversion (OTEC) systems remains underexplored. This study addresses that gap by developing a superhydrophobic surface modification scheme to promote dropwise condensation under low-temperature and low-pressure conditions. Superhydrophobic surfaces were created on 304 stainless steel samples using a spray method with nano SiO2+PDMS (polydimethylsiloxane), achieving a maximum contact angle of 154°. On the OTEC-VMD (vacuum membrane distillation) platform, the modified plate with SiO2 and PDMS mass fraction of 3.66%, an inlet temperature of 29°C, and a vacuum pressure of 1.77 kPa achieved a condensation enhancement ratio of 34% and an overall heat-transfer coefficient of 1043.2 W/(m2 ·K), a 33.65% increase relative to the unmodified plate. Under conditions of a SiO2 mass fraction of 2.47%, PDMS mass fraction of 3.66%, steam generation rate of 23 L/h, inlet seawater temperature of 29°C, and vacuum pressure of 1.77kPa, the modified plate achieved a condensation enhancement ratio of 36.7%, accompanied by a water-production flux of 7.78 kg/h/m2. Steam generation rate and vacuum pressure significantly influenced water production.
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Frontiers in Nutrition
·
2025
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IF 5.1
Jinpeng Gong,Yuhan Zhang,Tao Jie,Tao Huang,Yupeng Ma,Hao Chen,Jing Gan,Junbo Ge
Osteoporosis is a widespread skeletal disorder associated with reduced bone formation and increased fracture risk. Peptide-based therapeutics offer demonstrate anabolic potential for osteoporosis management but are limited by instability and rapid clearance. In this study, a dual-network hydrogel composed of fish gelatin (FG) and κ-carrageenan (κ-CG) was developed as a biocompatible carrier for a soybean-derived osteogenic peptide (SOP). The FG/κ-CG system exhibited provided mechanical integrity, hydration balance, and thermal stability, thereby enabling sustained peptide protection and controlled release. In a glucocorticoid-induced zebrafish osteoporosis model, oral administration of the SOP-loaded gel effectively restored bone mineralization to a level comparable with alendronate treatment. These findings suggest that the FG/κ-CG-SOP hydrogel provides a stable and bioactive platform for osteogenic peptide delivery and represents a promising nutritional or therapeutic approach for osteoporosis management.
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Agriculture-Basel
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2025
·Vol. 16
·期 1
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IF 3.6
Jianrong Zhao,Yuanhao Zhang,Fuxin Liu,Songling Chen,Hongbao Wu,Ruilin Huang
Spent mushroom substrate (SMS)-derived bio-based polyurethane coatings typically exhibit poor hydrophobicity and short nutrient release durations, limiting their ability to satisfy long-term crop requirements. This study developed improved controlled-release urea by preparing water-repellent and compact bio-polymer coatings from recyclable SMS using non-toxic siloxane and nano-SiO2modifiers through simple processes. The dual modification markedly reduced water absorption (from 6.60% to 4.43%) and porosity (from 6.32% to 3.92%), creating a dense coating with lotus-leaf-like nanoscale surface protrusions and fewer intermembrane pores. As a result, the nitrogen (N) release period of the dual-modified bio-polymer-polyurethane-coated urea (SBPCU) with a 7% coating thickness was extended from 23 days to 42 days. Phytotoxicity assessments confirmed the excellent biosafety of the bio-polymer coating, revealing no adverse effects on maize growth and even promotional effects at low concentrations. This approach offers a sustainable, eco-friendly, and scalable strategy for producing bio-polymer-coated urea from agricultural waste, serving as a viable alternative to petrochemical coatings while improving nutrient use efficiency and biosafety.
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