SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xinyu Cao,Xu Guo,Tianyuan Xiao,Wenchao Jia,Xiaodi Liu,Changgeng Li,He Zhang,Pedram Fatehi,Haiqiang Shi
Aerogels are great adsorbents for oil decontamination due to their high porosity and specific surface area. However, the current oil-adsorbing materials for preparing such aerogels are expensive and environmentally unfriendly. This study successfully prepared three superhydrophbic biomass-based aerogels (SBAs) using treating biomass in a green LiBr·3H 2 O system and hydrophobic modification with hexadecyltrimethoxysilane (HDTMS). The time and temperature of hydrophobic modification reaction and biomass components are optimized by orthogonal experiment and investigated by the response surface methodology to improve water contact angle (WCA). The prepared SBAs have low weight, specific surface area (85.12–136.64 m 2 /g), and hierarchical porous structure. The WCA of the SBAs was 157°±5°, exhibiting excellent superhydrophobicity of the SBAs. The high WCA is attributed to the successful grafting of Si in the forms of Si–O and C–Si onto the aerogel, as indicated by FTIR and XPS. Oil adsorption experiments have shown that SBAs had outstanding sorption capacity in the range of 8–37.8 g/g of oil/SBAs. Furthermore, the SBAs exhibited excellent reusability after ten cycles of use. These results demonstrate that the SBAs are practically viable and highly efficient biosorbents for treating oil spills and organic pollutants.
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LANGMUIR
·
2025
·
IF 3.9
Anhui Yu,Zhiguang Guo
Droplet manipulation on functional surfaces is an urgent problem to be solved. Fast and precise droplet manipulation plays an important role in many applications, such as microreactors and microfluidics. Although numerous techniques have been developed to manipulate droplets by injecting external stimuli, it remains a challenge to achieve high-precision, high-sensitivity, and fast droplet manipulation on smart, slippery response surfaces. Here, we report an intelligent slippery photopyroelectric response near-infrared-induced MXene-barium titanate/polyimide (SFMBPI) membrane. By using local near-infrared radiation (NIR), we can precisely control the droplet transport on the SFMBPI membrane, and SFMBPI uses electrospinning technology to better lock the dimethylsilicone oil, reducing the loss during the control process. Moreover, due to the presence of the pyroelectric layer, double external stimuli can be achieved. The thermal stimulation of the photothermal layer and the charge action of the pyroelectric layer make the manipulation of droplets on the SFMBPI surface more efficient and faster. Moreover, the experiment of negative gravity transport at an inclination angle of 6° demonstrates that the existence of the pyroelectric layer results in a greater driving force on the droplets, which can be more widely used. In addition, by inducing the direction of the NIR, programmable droplet transport and droplet merging can be achieved. Also, the SFMBPI membrane can be used for underwater bubble manipulation. This precise manipulation of droplets on the surface of SFMBPI membranes can be widely used in other fields, such as microfluidics.
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Ruizeng Luo,Yijie Fan,Yilin Qi,Yuan Bai,Meng Xiao,Yujia Lv,Jinrui Liang,Mingcheng Tang,Jiaping Zhang,Zhou Li,Dan Luo
Endogenous electric field (EF) originating from differences in ionic gradients plays a decisive role in the wound healing process. Based on this understanding, a self-manipulating sodium ion gradient-based endogenic electrical stimulation dressing (smig-EESD) is developed to achieve passive, non-invasive, endogenic electrical stimulation of wounds, which avoids the side effects of electrode occupancy, electrochemical reactions, and thermal effects present in traditional exogenous electrical stimulation. smig-EESD reduced the potential at the center of the wound by specifically absorbing Na+ in the exudate, ultimately strengthening the wound endogenous EF. Importantly, smig-EESD converted the active transport dependent on Na + /K + -ATPase into passive diffusion by adsorbing extracellular matrix Na+, and the saved ATP consumption promoted tissue repair process. smig-EESD regulated innate and adaptive immune responses by upregulating the secretion of multiple cytokines, thereby suppressing injury-associated inflammatory responses and reducing scar formation. smig-EESD reveals an endogenic electrical stimulation strategy that is independent of electrodes and circuits, and provides new insights into the future development of electronic medicine.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
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IF 5.4
Yao Deng,Ying-Ming Li,Wen-Juan Hu,Hang-Ping Fang,De-Yi Wang
Rigid polyurethane foam (RPUF), widely utilized as a thermal insulation material, presents considerable fire safety concerns. The combustion of RPUF generates significant heat, which poses serious risks to both human health and the environment. In an effort to improve the flame retardancy of RPUF while preserving its thermal insulation and compressive properties, this research introduced a novel flame retardant, DOPO-AZ, synthesized from 9,10-dihydro-9-oxa-10-phenanthrene-10-oxide (DOPO) and 2-aminothiazole (AZ). The incorporation of 17 wt% DOPO-AZ into RPUF resulted in the composite achieving a UL-94 V-0 classification, with the limiting oxygen index (LOI) increasing from 19.5 % to 24 %, and a reduction of 27.9 % in the peak heat release rate (PHRR) compared to pure RPUF. This study successfully enhanced flame retardancy while maintaining the thermal conductivity of RPUF at 0.034 W/(m·K), comparable to that of pure RPUF, and significantly improved its compressive strength by 25.8 %. The synergistic flame-retardant mechanisms of the RPUF/DOPO-AZ 17 composite in both condensed and gas phases were elucidated through scanning electron microscopy (SEM), thermogravimetric-Fourier transform infrared spectroscopy (TG-FTIR), and Raman spectroscopy, thereby providing a theoretical basis for the future design of more effective flame-retardant systems.
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Materials Horizons
·
2025
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IF 10.7
Wenchang Zhao,Shiyu Wang,Ying Zhou,Yanhong Li,Shuxian Tang,Yutong Zheng,Pingan Zhu
Light-driven micromotors with multiple motion modes offer significantly greater application potential than single-mode micromotors. However, achieving such versatility often requires complex structural designs and precise light focusing on specific micromotor regions, presenting challenges for dynamic operations and microscale precisions. This study introduces programmable assemblies of anisotropic micromotors driven by the photothermal Marangoni effect, produced in bulk via microfluidic technology. Under full-area near-infrared (NIR) irradiation, the micromotor exhibits multiple motion modes, including translation and revolution, while micromotor assemblies display additional rotational motion. Self-assembly of these micromotors is highly controllable and programmable, enabling easy customization of assembled structures to achieve desired motion modes. These features are expected to advance the development of various intelligent self-propelling systems, using multimodal individual micromotors as foundational building blocks.
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高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2024
·Vol. 58
·期 8
·085203
·
IF 3.1
Min Li,Qi Liu,Haonan Tian,Jianqiao Ma,Jun Xie
According to the problem that the performance of film capacitors is limited due to the poor insulation of polypropylene (PP) film, a new nano-filler was studied and a PP composite dielectric was fabricated. The breakdown strength of composite dielectrics was measured and the mechanism for improving their insulation properties was analyzed. In this paper, TiO2 with high dielectric constant is plasma-treated and then coated with a layer of PP shell. TiO2 increases the dielectric constant of PP film composite dielectrics, and shell-like PP makes TiO2 more tightly bound to the PP matrix. Compared with pure PP, the breakdown voltage of TiO2–F is increased by 18.7%, and the breakdown voltage of TiO2–F@PP-mah is increased by 40.5%, and the new nano filler greatly improves the insulation performance of PP. The experimental results show that TiO2 introduces a low-density trap, TiO2–F introduces a high-density deep trap, and the modification of PP-mah slows down the dielectric constant conflict, increases the compatibility between the nanoparticles and the matrix, and increases the trap energy level. Based on the analysis of experimental results with different mass fractions, this paper proposes the optimal filling ratio of the new core-shell, which provides a new method for the composite dielectric to improve the insulation performance.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yanli Wang,Long Chen,Shuhao Li,Zhikun Zhang
The preparation of geopolymers from municipal solid waste incineration fly ash (IFA) for CO 2 adsorption is a promising way to enable waste recycling and reduce CO 2 emissions into the atmosphere. However, the development of these waste-derived geopolymers is currently limited by their low porosity. In this work, a novel geopolymer-zeolite (GZ) composite was synthetized from IFA via in-situ hydrothermal conversion of geopolymer sphere (GS). GS acted as a precursor, providing growth sites for zeolite formation and ensuring its compressive strength, while the resulting zeolite enhanced the porosity of geopolymer. The effects of hydrothermal temperature, seed crystal proportion and NaOH concentration on the porosity and CO 2 adsorption capacity of GZ were investigated. The results showed that the specific surface area and pore volume of GZ increased with the increase of hydrothermal temperature, but first increased and then decreased with the increase of seed crystal content and NaOH concentration. The maximum specific surface area (252.0 m 2 /g) and pore volume (0.54 cm 3 /g) of GZ was obtained when the hydrothermal temperature, seed crystal proportion and NaOH concentration were 180 °C, 30 wt% and 1 M, respectively. The best CO 2 uptake of GZ and GS were 2.06 and 0.63 mmol/g at 25 °C and 1 atm. It indicated that the new formed analcime crystals in GZ could improve CO 2 adsorption capacity. Besides, GZ showed high compressive strength (3.37 MPa) and good CO 2 cyclic stability (1.65 mmol/g) after 10 cycles. DFT calculations result showed that the CO 2 adsorption mechanism of GZ was chemisorption, which was different from that of GS. This work provides a perspective for preparing IFA-derived geopolymer-zeolite composites with high strength and excellent CO 2 adsorption capacity.
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Soft Robotics
·
2024
·
IF 6.4
Yang Qu,Yiming Zhang,Boyuan Huang,Cheng Chen,Huacen Wang,Sicong Liu,Hongqiang Wang
Currently, pneumatic soft actuators are widely used due to their impressive adaptability, but they still face challenges for more extensive practical applications. One of the primary issues is the bulky and noisy air compressors required to generate air pressure. To circumvent this critical problem, this work proposes a new type of air pressure source, based on the vapor pressure at the gas–liquid equilibrium to replace conventional air pumps. Compared with the previous phase transition method, this approach gains advantages such as generating gas even at low temperatures (instead of boiling point), more controllable gas output, and higher force density (since both ammonia and water contribute to the gas pressure). This work built mathematical models to explain the mechanism of converting energy to output action force from electrical energy and found the aqua ammonia system is one of the optimal choices. Multiple prototypes were created to demonstrate the capability of this method, including a pouch actuator that pushed a load 20,555 times heavier than its dead weight. Finally, based on the soft actuator, an untethered crawling robot was implemented with onboard batteries, showing the potentially extensive applications of this methodology.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhi-Hui Xie,Yao Luo,Runjia Liu,Jilan Long,Liang Wu,Ke Wang,Chuan-Jian Zhong
Conventional micro-arc oxidation (MAO) coating on lightweight alloy displays innumerable micron-sized through-holes, severely restricting its corrosion protection in many industrial applications. To address this problem, we demonstrated a new strategy by creating a highly corrosion-resistant composite coating on magnesium alloy. The composite coating comprises a micrometer-scale MAO primer and a sub-micrometer-sized sulfur-selenium (S-Se) alloy top layer. The underlying MAO layer is incorporated with metal–organic framework (MOF) nanoparticles, including inhibitor-loaded zeolitic imidazolate framework-8 (ZIF-8) nano-containers. The thin S-Se film was fabricated by dip coating in a dimethylsiloxane-containing melt. The composite coating (S-Se/MOFs/MAO) with a thin thickness showed a tremendously increased charge transfer resistance and an ultralow corrosion current density down to 0.273 nA cm −2 , demonstrating remarkably superior corrosion protection in comparison with the unmodified and other MAO-based coatings reported to date. The origin of this unprecedented corrosion protection was mainly attributed to a combination of the inhibition by the released inhibitor and the structural integration resulting from the nanoparticle incorporation. Notably, the effective pore sealing via the strongly adhesive S-Se alloy thin film to the MgO layer through chemical bonding played an essential role in enhanced corrosion protection, supported by density functional theory calculation.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Abudureheman Bahatibieke,Jianming Zhao,Danping Fan,Zixiang Zhou,Junfei Li,Xing Wang,Hongyan Zhao,Tianyang Wang,Ziyuan Fang,Yajie Xie,Cheng Huang,Cheng Xiao,Yudong Zheng
Rheumatoid arthritis (RA) is a common autoimmune joint disease characterized by persistent synovial inflammation and cartilage damage. The current clinical treatments primarily utilize drugs such as triptolide (TP) to address inflammation, yet they are unable to directly repair damaged cartilage. Furthermore, the persistent inflammation often undermines the effectiveness of traditional cartilage repair strategies, preventing them from achieving optimal outcomes. To tackle this challenge, this study successfully developed a drug-loaded polyurethane hydrogel-oriented porous scaffold, designed to address persistent inflammation and facilitate cartilage repair under RA conditions. A drug-loaded hydrogel was formed via solvent-induced polyurethane-gelatin, resulting in the scaffold TP@GSPU. The sea-island micelle structure of TP@GSPU enables efficient loading of TP. The release of TP in the in vivo environment regulates the expression of inflammatory factors in macrophages, thereby improving the inflammatory microenvironment within the joint cavity. Additionally, the gelatin component of the scaffold provides robust support for cartilage regeneration. The efficacy of the TP@GSPU in regulating the inflammatory microenvironment and facilitating cartilage repair under RA conditions, which was demonstrated through cartilage damage repair experiments conducted in a rat collagen-induced arthritis (CIA) model. The design scheme of this material offers a potential approach to cartilage repair in the conditions of RA.
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Advanced Science
·
2024
·Vol. 11
·期 44
·2407765
·
IF 14.3
Tianxiang Du,Ning Ma,Zenghui Zhao,Yitong Liu,Xufeng Dong,Hao Huang
The shear yield strength, sedimentation stability and zero-field viscosity of magnetorheological fluids (MRFs) are crucial for practical vibration damping applications, yet achieving a balanced combination of these performances remains challenging. Developing MRFs with excellent comprehensive performance is key to advancing smart vibration damping technologies further. Theoretically, incorporating a multiscale particle system and leveraging synergistic effects between their can somewhat enhance MRFs’ performance. However, this approach often faces issues such as insignificant increases in shear yield strength and excessive rise in zero-field viscosity. In response, this study employs a DC arc plasma method to synthesize a high magnetic permeability, low coercivity submicron FeNi particles, and further develops a novel CIPs-FeNi bidisperse MRFs. The introduction of submicron FeNi particles not only significantly enhances the shear2019 yield strength of MRFs under low magnetic fields but also promotes improvements in sedimentation stability and redispersibility without excessively increasing viscosity. Comprehensive performance analysis is conducted to explore the optimal content ratio, and detailed mechanisms for the enhancement of performance are elucidated through analysis of parameters such as chain-like structure, magnetic flux density and friction coefficient. Most importantly, the superior comprehensive performance combined with straightforward fabrication methods significantly enhances the engineering applicability of the CIPs-FeNi bidisperse MRFs.
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Advanced Optical Materials
·
2024
·Vol. 12
·期 27
·2401098
·
IF 8
Meifeng Jiang,Xinle Lu,Maosheng Chen,Wenyi Tong,Hechun Lin,Chunhua Luo,Hui Peng,Chungang Duan
Crown ether-assisted supramolecular assembly is a robust strategy for manipulating low-dimensional metal halides. In this study, the supramolecular assembly of 0D-Cs 3 Cu 2 I 5 is presented. Upon the addition of 15-crown-5 (15C5) to Cs 3 Cu 2 I 5 , 15C5 immediately coordinates with Cs + to form the cone-shaped [(15C5)Cs] + . Simultaneously, one of the iodine atoms is removed from the [Cu 2 I 5 ] 3- cluster, resulting in the formation of a sub-planar rhombic [Cu 2 I 4 ] 2− unit. This process leads to white emission, specifically [(15C5)Cs] 2 [Cu 2 I 4 ], which exhibits a photoluminescence quantum yield (PLQY) close to unity. The [(15C5)Cs] + further reacts with 15C5 to form the sandwich-type cationic structure [(15C5) 2 Cs] + , accompanied by the generation of red emission [(15C5) 2 Cs] 2 [Cu 2 I 4 ]. By carefully controlling the amount of 15C5, various emission composites can be achieved, particularly tunable white emission. The assembly process is reversible. The pristine Cs 3 Cu 2 I 5 can be recovered after thermal curing because of the volatility of crown ether and the weak Cs-crown ether bond. Theoretical calculations have demonstrated that the coordination of the crown ether primarily affects the energy level, leading to changes in the excited state and photophysical properties. The applications in anticounterfeiting and LED phosphors have been demonstrated. This work provides a new approach for the development of low-dimensional copper halides with promising applications in optoelectronics.
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