TRIBOLOGY INTERNATIONAL
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2025
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IF 6.9
Bo Dai,Qian Jia,Bingbing Lai,Haichao Liu,Wenjing Lou,Xiaobo Wang
The development of conductive greases with friction-reducing, anti-wear, and anti-electrical corrosion performance provides an effective solution to mitigate bearing electrical erosion in electrical vehicles. In this study, a titanium carbide MXene (Ti 3 C 2 T x )-based eutectic hydrogen-bonded thickener is successfully synthesized through micro-interface reactions by exploiting the different reaction rates of –NH 3 , H 2 O, and –CNO functional groups. Tribological experiments indicate that the hydrogen bonding within the Ti 3 C 2 T x -based eutectic thickener facilitates the co-release of the thickener and Ti 3 C 2 T x nanosheets at tribological interfaces, thereby enhancing the lubricating film thickness. Moreover, the M-0.5 system (Ti 3 C 2 T x concentration of 0.5 wt%) achieves a 91 % reduction in wear volume, significantly decreases contact resistance, and effectively mitigates electrical corrosion. This study presents a feasible strategy for the design of two-dimensional oil-soluble complexes for the protection of grease lubricated bearings.
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COMPOSITES PART B-ENGINEERING
·
2025
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IF 14.2
Na Hong,Nian Li,Yanping Song,Shuai Han,Shudong Zhang,Zhao Li,Jun Kang,Cui Liu,Shihao Wang,Min Xi,Yongfeng Wang,Zhenyang Wang
High-capacity silicon/carbon composite anodes for lithium-ion batteries face rapid capacity degradation from extreme volume changes due to conventional organic-dominated solid electrolyte interphase (SEI) lacking mechanical/ionic stability. Constructing robust inorganic SEI (e.g., LiF-dominated interphases) requires synergistic control of electrolyte interactions at the inner Helmholtz plane (IHP) and stress-adaptive interfacial architectures. Herein, a hierarchical dual-coating strategy integrating polyaniline (PANi) and laser-induced graphene (LIG) on SiO x anodes addresses this challenge. PANi layer selectively enriches fluorinated ethylene carbonate (FEC) at the IHP via dipole-dipole interaction, enabling preferential FEC reduction at 1.3 V (vs. Li/Li + ) to form LiF-dominated SEI. Theoretical calculations confirm higher FEC adsorption density and stronger adsorption energy on the hierarchically dual-coated SiO x /LIG/PANi-2 (−0.33 eV) versus bare SiO x (−0.09 eV). Meanwhile, LIGʼs 3D porous conductive scaffold dissipates stress, sustaining structural integrity under repeated expansion. The optimized SiO x /LIG/PANi-2 anode achieves 1812.5 mAh g −1 initial capacity with 90.5 % initial Coulombic efficiency at 0.1 A g −1 and retains 87.7 % capacity after 1000 cycles at 2.0 A g −1 , demonstrating exceptional electrochemical stability. Post-cycling analyses further validate the homogeneity of LiF-rich SEI, robust mechanical resilience, and exceptional electrode integrity. This atomic-scale IHP regulation, harmonized with macro-scale stress engineering, offers scalable strategies for silicon anodes in high-energy-density batteries.
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Surfaces and Interfaces
·
2025
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IF 6.3
Liya Liu,Ying Gui,Siyuan Wang,Bin Wang,Yanming Huang,Jingyi Liu,Yingzhe Zhang,Chengjie Xin,Juanyun Li,Ding Chen
Superhydrophobic coatings exhibit significant potential for various applications, but their practical application is hindered by poor durability. Achieving high durability often relies on fluorinated reagents, posing environmental pollution risks. Herein, a fluorine-free strategy for fabricating durable and environmentally friendly superhydrophobic coatings was proposed to address these challenges. Octadecylamine-functionalized graphene oxide (ODA-GO) without fluorine compounds was synthesized via microwave-assisted ball milling. Subsequently, a superhydrophobic coating was established by spraying a mixture of ODA-GO, epoxy resin, and polydimethylsiloxane. The resulting coating demonstrated high superhydrophobicity, with a water contact angle greater than 161° on various substrates, and outstanding durability. After immersion in chemical solvents (NaCl, HCl, NaOH) for 24 h, prolonged ultraviolet (UV) irradiation, high-temperature exposure, and a series of mechanical stability tests, including tape peeling, sandpaper abrasion, sand impact, and water impact, the coating consistently maintained its superhydrophobic properties. Furthermore, the coating achieved a polarization resistance of 1.76 × 10 6 Ω·cm 2 after 21 days in a 3.5 wt% NaCl solution and maintained a high oil-water separation efficiency of up to 98 %. This work provides a green, fluorine-free approach for highly durable superhydrophobic coatings, paving a potential path for their practical applications in marine anti-corrosion and protective coatings for industrial equipment.
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EUROPEAN JOURNAL OF PHARMACEUTICS AND BIOPHARMACEUTICS
·
2025
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IF 4.3
Fangming Liang,Yue Wang,Ning Li,YuBo Liu,Yuan Gao,Yinan Song,Zhenzhen Zhao,Yongjun Wang,Hongzhuo Liu
The treatment of posterior uveitis remains challenging due to the need for long-term medication and the limited efficacy of current therapies. In this study, we developed an injectable rapamycin-based nanoparticle formulation designed to extend intraocular residence time and enhance retinal penetration, thereby improving therapeutic outcomes. The nanoparticles were formed via self-assembly of rapamycin conjugated with a hydrophobic alkyl chain, yielding uniformly spherical particles with an average diameter of approximately 90 nm. In vitro experiments confirmed that the formulation exhibited minimal cytotoxicity, potent anti-inflammatory effects, inhibition of endothelial cell migration, and efficient uptake by retinal pigment epithelial (RPE) cells. In vivo imaging demonstrated that the nanoparticles rapidly localized to the RPE layer of the posterior segment following intravitreal injection, in contrast to the free drug. Moreover, experimental autoimmune uveoretinitis (EAU) rats treated with nanoparticles exhibited a substantial alleviation of ocular inflammation and a concomitant reduction in the expression of inflammatory markers, including CD45, CD68, IBA-1, and IL-17.
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PubMed
高影响因子
Journal of Materials Chemistry B
·
2025
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IF 5.7
Yu Li,Pei Xie,Ruixin Gong,Junlong Chen,Yaxue Liu,Zongning Yin
Rheumatoid arthritis (RA), a chronic autoimmune disorder affecting 1% globally, urgently demands advanced therapies to overcome the systemic toxicity and limited efficacy of conventional glucocorticoids like dexamethasone (Dex). In this study, we constructed LMWH-Gly-Pro-ODA/Dex (LGPO/Dex) micelles, which synergistically integrate low molecular weight heparin (LMWH)-mediated active targeting with Gly-Pro-mediated fibroblast-activated protein (FAP)-α-responsive drug release to achieve spatiotemporal precision in RA treatment. The system operates through a three-stage cascade mechanism: (1) targeting the inflamed joints, (2) inflammation-responsive drug release to modulate pathological microenvironments (e.g., normalizing M1/M2 macrophage polarization), and (3) suppression of monocyte recruitment to prevent disease progression. LGPO/Dex micelles showed excellent RA therapeutic effects in the adjuvant-induced arthritis (AIA) model. Joint swelling, serum TNF-α, and nitric oxide (NO) levels in LGPO/Dex-treated rats showed no significant difference from healthy controls (ns) while exhibiting marked improvement over Dex monotherapy (**, P < 0.01). Notably, it also significantly reduced Dex-associated adverse effects. This study confirmed the feasibility of using FAP-α as a therapeutic target for RA and provided a new idea for RA treatment, offering a blueprint for disease-microenvironment-programmed therapeutics.
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PubMed
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JOURNAL OF SOLID STATE CHEMISTRY
·
2026
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IF 3.2
Shi-Chun Zhang,Xue-Shan Yu,Yong-Ming Zhang,You-Feng Wang,Wei-Bin Ma,Ai-Jun Jiao,Zhi-Wei Li,Tong Su,Zhen-Hai Fu
The "cold decomposition-direct flotation" method is presently the predominant technique for KCl production from carnallite ore. However, this process has been hindered by the interactions between NaCl and KCl, resulting in suboptimal product purity and the potassium recovery rate. This study investigated the influence of the decomposition solution's composition on the concentrate grade of KCl. Initially, flotation tests with NaCl and KCl mixtures revealed that fine and newly formed NaCl adversely affected concentrate grade of KCl. Subsequently, we investigated the effects of NaCl, KCl, and MgCl 2 solutions as decomposition solution on the grade of KCl flotation concentrates. The results showed that higher MgCl 2 concentrations significantly increased particle size and concentrate grade of KCl. Additionally, experiments with diluted decomposition mother liquor (the triple-saturation point E) demonstrated that lower dilution ratios enhanced concentrate grade of KCl, suggesting that the decomposition mother liquor can be adjusted to an appropriate concentration for the decomposition of carnallite ores in industrial applications. This study provides valuable insights for addressing the challenges of low concentrate grade and the inefficient utilization of carnallite ore.
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COMPOSITES PART B-ENGINEERING
·
2026
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IF 14
Jv Li,Chunwang Xu,Hongmei Chen,Kejing Yu,Gang Liu,Fenghua Zhang,Wenbing Li
Designing flexible electromagnetic interference (EMI) shielding materials that transition from static shielding to dynamic adaptability remains a significant challenge in the development of next-generation electronic protection. In this study, we fabricated a reusable flexible polyimide (PI)/MXene/silver nanowires (AgNWs) (PMA) EMI shielding composite film by assembling MXene and AgNWs onto a shape-memory PI matrix using a vacuum-assisted filtration technique. When the ratio of MXene to AgNWs was 2:1, the composite film exhibited a maximum electrical conductivity of 132 S/cm and an EMI shielding effectiveness of 60.68 dB in the X-band (8.2-12.4 GHz). After further optimizing the material structure, the gradient-structured PMA composite film (G-PM 2 A 1 ) achieved a shielding effectiveness of 67.85 dB. The shielding performance remained essentially unchanged under harsh conditions, including ultrasonic cleaning, acid corrosion, high temperature (250 °C), and low temperature (−196 °C). Owing to the intrinsic shape-memory properties of polyimide, the film could recover its original structure after repeated deformation-heating cycles, maintaining an EMI shielding effectiveness above 60 dB. Moreover, the composite film exhibited excellent thermal stability, mechanical strength, and flame retardancy. Its lightweight, flexibility, and environmental stability indicate potential for localized EMI shielding applications relevant to electric vehicle battery systems, where lightweight, flexible, and environmentally robust shielding layers are required.
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ELECTROCHIMICA ACTA
·
2026
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IF 5.8
Anis Alam,Tingkai Zhao,Syeda Khair Un Nisa
Flexible solid-state supercapacitor electrodes require fiber-shaped conductors that combine high electrical conductivity and textile-level mechanical compliance. However, transforming engineering polyimide (PI) fibers from electrically insulating structural supports into integrated conductive electrodes without sacrificing their intrinsic mechanical integrity remains a significant challenge. In contrast to previously reported MXene/CNT/polymer-based flexible fibers, which are predominantly built on soft or elastomeric matrices, achieving high conductivity within a high-temperature structural polyimide while preserving its strength and toughness remains largely unexplored. Herein, we converted intrinsically insulating PMDA–ODA polyimide (PI) into conductive and mechanically robust fibers by wet-spinning of Ti 3 C 2 T x MXene- and carbon nanotube (CNT)-loaded polyamic-acid (PAA) dopes followed by thermal imidization. The resulting MXene (2D)–CNT (1D)–PI fibers exhibit a hierarchical 1D–2D conductive network in which CNTs bridge MXene sheets, suppress restacking, and reduce interflake resistance. The experimental results show that the electrical conductivity increases from ∼1.6 × 10 –10 S·m -1 for pristine PI to 1.61 S·m -1 for MXene/PI and further to 1.5 × 10 2 S·m -1 for MXene–CNT–PI. Using a solid H 3 PO 4 /PVA gel as the electrolyte, the optimized multicomponent fibers display nearly rectangular cyclic voltammetry curves, quasi-triangular charge–discharge behavior, volumetric capacitances of 80–20 F·cm -3 at 0.05–0.20 A·cm -3 , and ∼68% capacitance retention after 5000 cycles. Importantly, despite the incorporation of conductive nanofillers, the fibers retain high tensile strength (∼200 MPa), large elongation (∼35–40%), and high toughness (∼30–32 MJ·m -3 ), approaching that of pristine PI. This work demonstrates a scalable strategy to convert structural polyimide fibers into conductive, mechanically robust electrodes suitable for flexible solid-state energy-storage systems.
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Surfaces and Interfaces
·
2026
·
IF 6
Lei Kang,Xinzhe Dang,Fei Li,Zhen Zhang,Jiantong Yun,Tongze Zhang,Ni Gao,Lei Feng,Shengdan Wang
Conventional superhydrophobic materials for oil–water separation often suffer from poor durability, limited versatility, and environmental concerns arising from fluorine-containing components. To address these drawbacks, this study reports a fluorine-free superhydrophobic stainless steel mesh (ODA‑NS/MUF‑SH‑SSM) fabricated using natural nano‑soil (NS) as a green, roughness-enhancing component, representing a key environmentally friendly breakthrough. The mesh was prepared through two simple steps: spray‑coating with NS/melamine‑urea‑formaldehyde resin (NS/MUF) to construct a micro‑nano rough structure, followed by grafting octadecyl acrylate (ODA) to reduce the surface energy. Characterizations, including SEM, FTIR, EDS, and XPS, confirmed successful surface functionalization. The modified mesh exhibited a water contact angle >160°, rapid oil permeation within 0.4 s, and separation efficiencies >98% for various oil–water mixtures over 100 cycles. Durability tests showed that it retained a contact angle >140° after 100 friction cycles under a 200 g load. This fluorine‑free, natural nano‑soil‑based design aligns with environmental sustainability while overcoming key limitations of traditional superhydrophobic materials, thereby enhancing practical applicability.
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SENSORS AND ACTUATORS A-PHYSICAL
·
2026
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IF 5.1
Fang Suo,Tao Wan,Fei Chang,Jianwei Cui,Yongtao Yao,Weijian Yuan,Xuelin Zhang,Yanju Liu
With the rapid development of aerospace engineering, geological exploration and intelligent fire protection, increasing attention has been directed toward sensing technologies for high temperature environments. In this case, flexible mechanical sensors still face challenges such as high temperature resistance and temperature drift. In this study, a novel biomimetic material was proposed to improve thermal resistance and solve the problem of high temperature drifting of sensors. Drawing inspiration from the structure of cuttlebone, a bioinspired anisotropic polyimide aerogel (BA-PA) using polyimide has been developed with bidirectional freezing method. The BA-PA exhibits excellent thermal stability and good fatigue resistance, making it an ideal dielectric layer for capacitive sensors. BA-PA sensor demonstrates stable force-electrical response and an ultrafast response time (∼10 ms). Meanwhile, the sensor operates stably with wide range from 20°C to 340 °C. Finally, the BA-PA sensor was demonstrated to possess the capability of achieving both tactile and gesture sensing. This work expands the application scope of polyimide aerogels and provides a new strategy for sensing under high-temperature environment.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
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IF 9.6
Mengqing Yu,Xiao Chen,Jiacheng Liu,Pingxin Wu,Deshun Li,Jun Lu,Aming Xie,Chao Yu
The escalating electromagnetic pollution crisis driven by 5G/6G technologies necessitates lightweight multifunctional absorbers with integrated electromagnetic-thermal management capabilities. Herein, we pioneer a gradient magneto-dielectric heterostructured aerogel that synergistically integrates magnetic MXene hollow spheres (HM) with a conductive polyimide network. This hierarchical architecture leverages spatially graded functional layers to achieve unprecedented electromagnetic wave dissipation and thermal stealth. The magnetic-functionalized HM establish a multi-scale electromagnetic trap, inducing intensive interfacial polarization and magnetic-dielectric coupling losses. Simultaneously, the vertically aligned channels in the polyimide-based aerogel matrix provide exceptional phonon scattering pathways for thermal insulation. This rational design enables ultrabroadband electromagnetic wave absorption with a minimum reflection loss of −52.5 dB at 1.3 mm and an effective absorption bandwidth covering 7.54 GHz. It is noteworthy that when the material was exposed to a substrate at 220 °C, the surface temperature dropped to 82.7 °C, coupled with an average infrared emissivity of 0.75 for adaptive thermal camouflage. Further, the aerogel exhibits 51% suppression in peak heat release rate and maintains structural integrity under 60% compressive strain. This work establishes a paradigm-shifting gradient heterostructure strategy that transcends conventional impedance matching limitations, opening new avenues for next-generation electromagnetic-compatible materials in aerospace, wearable electronics, and defense systems.
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PubMed
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Runyue Li,Daolei Lin,Zheng Zhao,Guofeng Tian,Shengli Qi,Dezhen Wu
Addressing the structural shrinkage during high-temperature imidization (>300 °C) of polyimide (PI) aerogels is a critical challenge for enhancing their thermal insulation and electromagnetic wave-transparent performance in aerospace applications. Herein, a thiazine/imidazole in-situ co-catalyzed low-temperature imidization strategy is developed for the first time, by which PI aerogel with nearly “zero” shrinkage is successfully prepared. This method works by introducing 2,4-diamino-6-[2-(2-methyl-1-imidazolyl) ethyl]-1,3,5-triazine (2MZ-AZINE), whose dual amino groups not only construct a crosslinked network with polyamic acid chains but also precisely anchor catalytic groups onto the side chains, thereby enabling highly efficient low-temperature cyclization. Experimental results indicate that cyclization temperature is reduced from conventionally over 300 °C to 200 °C, consequently reducing shrinkage of PI aerogel significantly from 30.6% to 3.1%. Correspondingly, the 2MZ-AZINE-PI aerogel achieves low density (4.74 mg cm −3 ), super-hydrophobicity (152.7° water contact angle) and low thermal conductivity (25.3 mW m −1 K −1 ). Thermal insulation tests show that the 2 cm-thick 2MZ-AZINE-PI controls the surface temperature to be less than 62.3 °C after 20 min on a 200 °C hot stage (versus 72.8 °C for common PI aerogel), demonstrating superior thermal protection. Moreover, 2MZ-AZINE-PI exhibits record-low dielectric constant in the X-band (8–12 GHz), remarkably close to that of air, with permittivity of 1.004 and loss tangent of 8 × 10 −4 , confirming its exceptional electromagnetic wave-transparent properties. This work establishes a practically useful new paradigm for designing integrated thermal protection/electromagnetic wave-transparent PI aerogel materials for potential aerospace applications.
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