Colloids and Surfaces A: Physicochemical and Engineering Aspects最新文献_第10页

Self-assembled cross-linking composite electrospun nanofiber membranes: Synergistic antibacterial action and enhanced wound healing performance 自组装交联复合静电纺纳米纤维膜：协同抗菌作用和增强伤口愈合性能

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-02-02 DOI: 10.1016/j.colsurfa.2026.139832

Wenbo Wu , Zutong Cui , Qing Li , Dongxue Ning , Xiujuan Liu , Bingbing Li , Zhiwei Liu , Jian Li , Tifeng Jiao

This study develops a novel polyvinyl alcohol/polyethylene oxide/polyhexamethylene biguanide hydrochloride/benzalkonium chloride (PVA/PEO/PHMB/BAC, designated POBC) electrospun nanofiber membrane with dual-antimicrobial synergy for advanced wound management. To address the inherent water solubility of PVA, glutaraldehyde vapor-phase crosslinking (POBC-crossing) was employed to enhance hydrophobicity and mechanical stability. The optimized membrane exhibited uniform fiber morphology (diameter: 170 nm) and significantly improved tensile strength (6 MPa post-crossing). FTIR and XRD analyses confirmed successful chemical crosslinking and amorphous structural characteristics. The dual antibacterial system showed a synergistic effect and exhibited good antibacterial activity against both Staphylococcus aureus and Escherichia coli. Biocompatibility was validated by high cell viability (>97 %) and low hemolysis rate (2.59 %). In vivo studies on full-thickness wounds in mice revealed accelerated healing, with POBC-crossing achieving near-complete closure by day 14. Histological analysis confirmed enhanced collagen deposition, granulation tissue formation, and neovascularization, coupled with reduced IL-6 expression. The multifunctional membrane integrates optimal breathability (WVTR: 1273 g·m^-²·d^-¹), antibacterial efficacy, and biocompatibility, demonstrating potential for clinical wound dressings.

本研究开发了一种新型聚乙烯醇/聚环氧乙烷/聚六亚甲基二胍/苯扎氯铵（PVA/PEO/PHMB/BAC，简称POBC）电纺丝纳米纤维膜，具有双抗菌协同作用，用于高级伤口管理。为了解决聚乙烯醇固有的水溶性问题，采用戊二醛气相交联（pobc -交联）来提高聚乙烯醇的疏水性和机械稳定性。优化后的膜具有均匀的纤维形态（直径170 nm）和显著提高的抗拉强度（6 MPa）。FTIR和XRD分析证实了成功的化学交联和非晶结构特征。双抑菌体系具有协同作用，对金黄色葡萄球菌和大肠杆菌均有良好的抑菌活性。高细胞活力（>97 %）和低溶血率（2.59 %）验证了生物相容性。小鼠全层伤口的体内研究显示愈合加速，pobc交叉在第14天几乎完全闭合。组织学分析证实胶原沉积、肉芽组织形成和新生血管增强，并伴有IL-6表达降低。该多功能膜具有最佳的透气性（WVTR: 1273 g·m-²·d-¹）、抗菌效果和生物相容性，具有临床伤口敷料的潜力。

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引用次数: 0

Thermally enhanced self-healing integral superhydrophobic concrete 热增强自修复整体超疏水混凝土

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-02-02 DOI: 10.1016/j.colsurfa.2026.139813

Mingzhong Wei , Qi Zhang , Yuzhen Zhao , Jiandong Liang , Jiale Ma , Song Ding , Yanni Chen , Sirui Xu , Wenxin Wang , Haiyang Zhan , Qi Chen

Superhydrophobic concrete demonstrates exceptional promise for self-cleaning and corrosion-resistant applications owing to its superior water repellency. Despite significant advances, superhydrophobic performance failure persists due to micro/nano structural damage and thermal degradation of low-surface-energy substances. Herein, we developed a self-healing integral superhydrophobic concrete (SISC). When exposed to a high-temperature environment, internal low-surface-energy substances within SISC decompose and form enriched spherical nanoparticles on the surface. This process not only preserves its superhydrophobicity but significantly enhances it, endowing the SISC with unprecedented repellency towards hot water and oil. Remarkably, even if SISC loses its superhydrophobicity due to the complete decomposition of its surface substances, SISC can still achieve autonomous recovery of its superhydrophobic function through reconfiguration and modification of low-surface-energy substances triggered by heating-induced decomposition and migration of internal components. Moreover, the integral superhydrophobicity of SISC fundamentally overcomes the intrinsic limitation of conventional coatings, which suffer from superhydrophobicity failure due to microstructural collapse caused by mechanical abrasion. This self-healing integrated superhydrophobic strategy establishes a new paradigm for fabricating durable and mechanically robust superhydrophobic concrete.

超疏水混凝土由于其优越的拒水性，在自清洁和耐腐蚀应用方面表现出了非凡的前景。尽管取得了重大进展，但由于微/纳米结构损伤和低表面能物质的热降解，超疏水性能失效仍然存在。在此，我们开发了一种自修复的整体超疏水混凝土（SISC）。当暴露在高温环境中时，SISC内部的低表面能物质会分解并在表面形成富集的球形纳米颗粒。这个过程不仅保留了它的超疏水性，而且显著增强了它的超疏水性，赋予了SISC前所未有的对热水和油的拒水性。值得注意的是，即使由于其表面物质完全分解而失去其超疏水功能，SISC仍然可以通过加热诱导分解和内部组分迁移引发的低表面能物质的重新配置和修饰，实现其超疏水功能的自主恢复。此外，SISC的整体超疏水性从根本上克服了传统涂层由于机械磨损导致微观结构崩溃而导致超疏水性失效的固有局限性。这种自我修复的综合超疏水策略为制造耐用和机械坚固的超疏水混凝土建立了新的范例。

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引用次数: 0

Spreading and adhesion properties of compressed air foam on vertical facades: Effects of gas-liquid ratio and spray angle 压缩空气泡沫在垂直立面上的扩散和粘附性能：气液比和喷射角度的影响

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-02-02 DOI: 10.1016/j.colsurfa.2026.139829

Yongkang Guo , Qian Feng , Zhuoxuan Li , Lilong Nie , Agoston Restas , Kaiyuan Li , Linlin Yi

Compressed air foam offers a promising solution to address the current fire risks on building facades. This study investigates the effects of gas-liquid ratio and spray angle on the spreading and adhesion properties of compressed air foam on facades. The results indicate that as the gas-liquid ratio increases from 4:1–15:1, the foam spreading rate decreases by 3 times, while the foam layer thickness increases by 2.4 times. When the spray angle increases from 0° to 90°, the spreading rate decreases by 50 %, while the foam layer thickness increases by 50 %. The foam spreading rate on vertical facades is approximately 5.1 times that on horizontal liquid surfaces. An increase in the gas-liquid ratio results in a more uniform foam structure and up to 1.4 times increase in apparent viscosity. A reduction in the spray angle intensified gravitational shear and disrupted the foam structure, which results in a decrease in apparent viscosity. The gas-liquid ratio and spray angle affect the apparent viscosity of foam by modulating its intrinsic physical properties and externally applied forces, thereby affecting the foam spreading and adhesion properties. Predictive models are developed to estimate the spreading rate (

V_{s}

) and foam layer thickness (

H_{f}

) in relation to the apparent viscosity (

η

), which indicate

V_{s} \propto - 5.23 η

and

H_{f} \propto e^{0.48 η}

.The model predictions providing a theoretical basis for designing the compressed air foam suppression systems for high-rise building facades.

压缩空气泡沫为解决当前建筑立面的火灾风险提供了一个很有前途的解决方案。研究了气液比和喷射角度对压缩空气泡沫在建筑立面上扩散和粘附性能的影响。结果表明：当气液比从4:1增加到15:1时，泡沫铺展速率降低了3倍，泡沫层厚度增加了2.4倍；当喷射角从0°增加到90°时，扩散速率降低了50 %，而泡沫层厚度增加了50 %。泡沫在垂直立面上的扩散速度约为水平液体表面的5.1倍。气液比的增加使泡沫结构更加均匀，表观粘度增加1.4倍。喷射角的减小加剧了重力剪切，破坏了泡沫结构，导致表观粘度的降低。气液比和喷射角度通过调节泡沫的内在物理性质和外力来影响泡沫的表观粘度，从而影响泡沫的扩散和粘附性能。建立了扩散速率Vs和泡沫层厚度Hf与表观粘度η的关系预测模型，结果表明Vs∝−5.23η, Hf∝e0.48η。模型预测结果为高层建筑外立面压缩空气泡沫抑制系统的设计提供了理论依据。

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引用次数: 0

Assembly of carbon-coated FeMn nanoparticles with biochars for efficient degradation of tetracycline via activating peroxymonosulfate 用生物炭组装碳包覆的FeMn纳米颗粒，通过活化过氧单硫酸盐高效降解四环素

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-02-02 DOI: 10.1016/j.colsurfa.2026.139815

Peiling Yuan , Junjun Li , Tatiana Grigorievna Cherkasova , Lu Li

Precious or rare-earth metallic nanocatalysts for antibiotic degradation always suffer from high cost. Metal leaching in catalysis also induces secondary pollution and sharply decreased efficiency. Herein, nitrogen-modified carbon-coated iron manganese (FeMn@G) nanoparticles with tailored nanostructures (23.6–38.2 nm for core and 3.11–1.27 nm for shell) were fabricated by changing the mass ratios of iron oxide/manganese oxide/graphite via pulsed laser ablation. Porous FeMn@G-modified biochars (FeMn@G/Bs) were synthesized through crosslinking of FeMn@G with straw-prepared biochars pyrolyzed at 300 °C, 450 °C and 600 °C. Tetracycline degradation via activating peroxymonosulfate (PMS) were studied under conditions including FeMn@G/B species and dosage, PMS and initial tetracycline concentrations, solution pH, and coexisting anions. Catalytic k value of 0.455 min⁻¹ (98.5 % removal ratio, 50.6–14.2 and 4.2–2.7 times higher than biochars and FeMn@G, respectively) and excellent recycling (10.9 % of remained tetracycline after 10 cycles) were achieved. FeMn@G/Bs presented low metal leakages (10.1–3.5 μg/L Mn and 12.4–3.6 μg/L Fe during 10 cycles) and promising degradation universality for multiple antibiotics. Spectroscopic analysis unveiled the electron transfer capacity of FeMn@G/Bs through a Fe/Mn redox pair. The generation of ¹O₂ and electron transfer pathway dominated the main mechanisms. This finding opened up a new insight for integrating composite catalysts to degrade antibiotics with enhanced efficiency and stability.

用于抗生素降解的贵金属或稀土金属纳米催化剂一直是价格昂贵的问题。催化过程中的金属浸出也会引起二次污染，导致效率急剧下降。本文通过脉冲激光烧蚀改变氧化铁/氧化锰/石墨的质量比，制备了具有定制纳米结构的氮修饰碳包覆铁锰（FeMn@G）纳米颗粒（芯为23.6 ~ 38.2 nm，壳为3.11 ~ 1.27 nm）。通过将FeMn@G与在300 °C、450 °C和600 °C下热解的秸秆制备的生物炭交联制备多孔FeMn@G-modified生物炭（FeMn@G/Bs）。研究了活化过氧单硫酸根（PMS）降解四环素的条件，包括FeMn@G/B的种类和用量、PMS和四环素初始浓度、溶液pH和共存阴离子。催化k值为0.455 min−1（去除率为98.5 %，分别是生物炭和FeMn@G的50.6-14.2倍和4.2-2.7倍），循环10次后剩余四环素的回收率为10.9 %)。FeMn@G/Bs具有较低的金属漏出率（10个循环中0.1 ~ 3.5 μg/L Mn和12.4 ~ 3.6 μg/L Fe），对多种抗生素具有较好的降解普遍性。光谱分析揭示了FeMn@G/Bs通过Fe/Mn氧化还原对的电子转移能力。1O2的生成和电子传递途径是主要机制。这一发现为整合复合催化剂以提高效率和稳定性降解抗生素开辟了新的思路。

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引用次数: 0

Phosphoric acid- and water-synthesized microalgea hydrochar for photocatalytic degradation of norfloxacin 磷酸-水合成微藻烃类光催化降解诺氟沙星

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-02-02 DOI: 10.1016/j.colsurfa.2026.139816

Chenyan Hu , Jiali Wang , Suxin Wu , Lianguo Chen

Hydrothermal carbonization (HTC) has the advantage for valorizing wet biomass, and the produced hydrochar (HC) is a promising carbon material for energy and environmental applications. Herein, the renewable and abundant microalgae including three species (Microcystis, Chlorella, and Euglena) were used as feedstock to synthesize algal HC in phosphoric acid (H₃PO₄) solution and water. Physicochemical characterizations revealed that H₃PO₄-synthesized HC had higher specific surface area and carbonization/graphitization degree, as well as richer surface oxygenated functional groups (OFGs) relative to its water-synthesized peers, due to the acid catalyzed HTC process. By virtue of these merits, H₃PO₄-syntheized HC absorbed more light and transported photogenerated chargers faster. When directly working as photocatalyst, water-synthesized algal HC moderately removed the prevalent pollutant norfloxacin (NOR) in 120 min, while significantly enhanced adsorption and degradation were attained by H₃PO₄-syntheized HC, reaching 82.1 %, 79.2 %, and 78.5 % removal from three species algae. Especially, non-adjusted pH was more suitable for NOR degradation by algal HC, which was slightly affected by co-existing cations (Ca^2 +, Mg²⁺, Na⁺, K⁺), but inhibited by anions and humic acid. Trapping tests and electron paramagnetic resonance identified the main contribution of superoxide radicals to NOR degradation. Meanwhile, the surface OFGs of algal HC were conducive to its reactive species generation, as confirmed by further oxidizing its surface by H₂O₂. Based on detected intermediates, NOR degradation pathways were deduced, and its high toxicity towards zebrafish embryos were mitigated substantially by eco-friendly algal HC photocatalyst. This study advances the synthesis of algal HC and firstly expands its application in photocatalysis.

水热炭化（HTC）具有活化湿生物质的优势，所产生的碳氢化合物（HC）是一种很有前景的能源和环境碳材料。本研究以丰富的可再生微藻（Microcystis、Chlorella和Euglena）为原料，在磷酸（H3PO4）溶液和水中合成藻HC。物理化学表征表明，与水合成的HC相比，h3po4合成的HC具有更高的比表面积和碳化/石墨化程度，并且由于酸催化的HTC过程，其表面氧合官能团（OFGs）更丰富。由于这些优点，h3po4合成的HC吸收更多的光，并且更快地传输光生成充电器。当直接作为光催化剂时，水合成的HC对常见污染物诺氟沙星（NOR）的去除时间为120 min，而h3po4合成的HC对三种藻类的吸附和降解效果显著，去除率分别达到82.1 %、79.2% %和78.5 %。其中，非调节pH更适合藻HC对NOR的降解，同时存在的阳离子（Ca2 +、Mg2+、Na+、K+）对藻HC的降解影响较小，阴离子和腐殖酸对藻HC的降解有抑制作用。捕获试验和电子顺磁共振鉴定了超氧自由基对NOR降解的主要贡献。同时，藻类HC的表面OFGs有利于其活性种的生成，H2O2进一步氧化其表面证实了这一点。基于检测到的中间体，推断了NOR的降解途径，并通过生态友好型藻类HC光催化剂大大减轻了其对斑马鱼胚胎的高毒性。本研究推进了藻类HC的合成，首次拓展了其在光催化方面的应用。

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引用次数: 0

Dynamics simulation of optically induced particle assembly for 3D microstructure 三维微观结构的光诱导粒子装配动力学模拟

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-02-02 DOI: 10.1016/j.colsurfa.2026.139819

Sheng Hu , Lingli Wang , Yu Liu

Particle assembly is a fascinating study in the fields of micromanipulation, such as artificial tissue and organ, photonic crystal synthesis, and superstructure material fabrication. Optoelectronic tweezers, as a flexible manipulation approach, could provide underlying potential to guide the target particles into a desired location. The secondary DEP effect plays an important role in particle-particle interaction to decide their structure and pattern. In this way, this paper proposes a flexible and straightforward dipole moment model to simulate the assembly of particles onto an induced light pattern. The commercial software COMSOL Multiphysics can efficiently solve the Laplace equation related to the electric field. It is important that the built-in particle tracing module enables the analysis of particle behaviors once the relevant forces have been determined. Thus, a circle ring light pattern, acting as a virtual electrode, can be used in the study of particle assembly with the advantages of no programming and good visualization. We can study a number of particles, ranging from three to ten, in this model and observe their specific assembly resulting from particle-particle interactions. The simulated results imply that particle numbers lead to unique three-dimensional structures. Compared to the symmetric assembly caused by a ring, the assemblies at the bottom wall can be characterized by square and triangular rings. This approach provides a new insight into exploring the particle assembly and their structures in optoelectronic tweezers. Furthermore, the specific pattern consisting of particles can act as a candidate for applications in photonic crystal filters and surface plasmon resonance.

粒子组装在人工组织和器官、光子晶体合成、超结构材料制造等微观操作领域是一个引人入胜的研究课题。光电镊子作为一种灵活的操作方法，可以提供潜在的潜力，将目标粒子引导到所需的位置。二次DEP效应在粒子-粒子相互作用中起着决定粒子结构和模式的重要作用。通过这种方法，本文提出了一种灵活而直接的偶极矩模型来模拟粒子在诱导光模式上的组装。商用软件COMSOL Multiphysics可以有效地求解与电场有关的拉普拉斯方程。重要的是，内置的粒子跟踪模块能够在确定相关力后分析粒子行为。因此，环形光模式作为一个虚拟电极，可用于粒子组装的研究，具有无需编程和良好的可视化的优点。我们可以在这个模型中研究许多粒子，从3到10不等，并观察它们由粒子-粒子相互作用产生的特定组装。模拟结果表明，粒子数导致了独特的三维结构。与由环引起的对称装配相比，底部壁的装配可以用正方形和三角形的环来表征。这种方法为探索光电镊子中的粒子组装及其结构提供了新的视角。此外，由粒子组成的特定图案可以作为光子晶体滤波器和表面等离子体共振的候选应用。

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引用次数: 0

Cellulose nanocrystals as nanocarriers for improved stability and digestion-resistant release of curcumin 纤维素纳米晶体作为姜黄素稳定性和抗消化释放的纳米载体

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-02-01 DOI: 10.1016/j.colsurfa.2026.139809

Feng Zhou , Yuhan Jiang , Wei Lai , Yu Zhang , Fangji Yang

Cellulose nanocrystals (CNCs) have attracted fast increasing interests in the pharmaceutical and food (nano)formulations, due to their inherent sustainability and unique characteristics, but the highly hydrophilic nature greatly limits their applications. Here, we investigated the potential of CNCs to perform as (nano)carriers for curcumin (Cur), an important hydrophobic bioactive. To achieve this, two strategies were adopted: use of octenyl succinic anhydride specificly modifying CNCs (OSA-CNCs) and application of an emulsification-evaporation process. The loading amount (LA) and yield of Cur in the soluble Cur-CNC complexes, as well as their particle characteristics (including particle size and morphology), were characterized using dynamic light scattering (DLS), atomic force microscopy (AFM), X-ray diffraction (XRD), and UV-Vis spectroscopy. The results indicated that OSA-CNCs exhibited a superior loading amount (up to 7.5 g/100 g CNC) compared to unmodified CNC (1.36 g/100 g CNC). The greater LA in the OSA-CNCs case was mainly due to the formation of nanobundle-like complexes with Cur molecules as the binding cores. The Cur encapsulated in all the complexes was prominently present in the amorphous state, and exhibited an significantly improved stability. In vitro digestion experiments indicated that the encapsulated Cur molecules had a low bioaccessibility, but kept highly stable throughout the whole gastric and intestinal digestion. This research indicates that CNCs can be developed into a kind of effective carriers for improved water dispersibility, chemical stability and delayed release during GI digestion of hydrophobic bioactives. The findings would be of great interest for extending the utilization of CNCs in the pharmaceutical and food formulations, and the design of colon-targeted delivery systems.

纤维素纳米晶体（CNCs）由于其固有的可持续性和独特的特性，在制药和食品（纳米）配方中引起了越来越多的兴趣，但其高度亲水性极大地限制了其应用。在这里，我们研究了CNCs作为姜黄素（Cur）的纳米载体的潜力，姜黄素是一种重要的疏水生物活性物质。为了实现这一目标，采用了两种策略：使用辛烯基丁二酸酐特异性修饰cnc （osa - cnc）和应用乳化蒸发工艺。采用动态光散射（DLS）、原子力显微镜（AFM）、x射线衍射（XRD）和紫外可见光谱（UV-Vis）表征了可溶性cu - cnc配合物中Cur的负荷量（LA）和产率，以及它们的颗粒特征（包括粒径和形貌）。结果表明，与未改性的CNC（1.36 g/100 g CNC）相比，osa -CNC表现出更高的负载量（高达7.5 g/100 g CNC）。在osa - cnc的情况下，更大的LA主要是由于形成了以Cur分子为结合核心的纳米束状配合物。包封在所有配合物中的Cur都以非晶态显著存在，并表现出明显改善的稳定性。体外消化实验表明，包封后的Cur分子具有较低的生物可及性，但在整个胃和肠道消化过程中保持高度稳定。本研究表明，cnc可作为一种有效的载体，改善疏水生物活性在胃肠道消化过程中的水分散性、化学稳定性和延迟释放。这一发现对于扩大cnc在制药和食品配方中的应用以及结肠靶向递送系统的设计具有重要意义。

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引用次数: 0

Lotus leaf-inspired MCMB/MnO2 superhydrophobic composite coating simultaneously boosts thermal dissipation and electromagnetic shielding for aerospace avionics 受荷叶启发的MCMB/MnO2超疏水复合涂层同时增强了航空航天电子设备的散热和电磁屏蔽

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-02-01 DOI: 10.1016/j.colsurfa.2026.139810

Jiahuan Wang , Zuozhu Yin , Xiangyu Han , Yongcun Ma , Zhen Hong , Chan Xie , Zhiyang Jiang , Yidan Luo

Avionics equipment often use epoxy resin as encapsulation material. However, epoxy resins have limited performance in terms of heat dissipation, electromagnetic shielding, and resistance to moisture and heat. As the integration of avionics continues to increase, epoxy resins have become more and more difficult to meet the stringent requirements for high reliability of avionics in the aerospace industry. In this study, inspired by the unique structure of lotus leaves, a thin film composite of mesophase carbon microspheres (MCMB) and manganese dioxide (MnO₂) was prepared on the surface of a copper foil using a mechanical hybrid spraying method. The film exhibits excellent superhydrophobicity with a water contact angle of 161.1°. This performance was attributed to its micro- and nanoscale roughness structure and low surface energy modification by POTS/stearic acid. In terms of infrared stealth, the composite material effectively suppresses thermal radiation through a trapped air layer and gradient thermal resistance design. In addition, the material’s electromagnetic shielding effectiveness in the 2.4 GHz band reaches −56 dB, originating from the synergistic effect of reflection loss in the copper substrate and dielectric absorption in MnO₂. At the same time, the three-dimensional network constructed by the MCMBs gives the material high thermal conductivity, which significantly improves the thermal management efficiency. The composite film also has good abrasion resistance, chemical stability and self-cleaning function, which is suitable for avionics and other fields of protection, providing a new solution to solve the problem of avionics packaging.

航空电子设备常采用环氧树脂作为封装材料。然而，环氧树脂在散热、电磁屏蔽、防潮和耐热方面的性能有限。随着航空电子设备集成度的不断提高，环氧树脂越来越难以满足航空工业对航空电子设备高可靠性的严格要求。本研究以荷叶的独特结构为灵感，采用机械混合喷涂的方法在铜箔表面制备了中间相碳微球（MCMB）与二氧化锰（MnO2）的复合薄膜。该膜具有良好的超疏水性，水接触角为161.1°。这主要归功于其微纳米级的粗糙结构和低表面能的硬脂酸改性。在红外隐身方面，复合材料通过捕获空气层和梯度热阻设计有效抑制热辐射。此外，材料在2.4 GHz频段的电磁屏蔽效能达到−56 dB，这是由于铜衬底中的反射损耗和MnO2中的介电吸收的协同效应。同时，由mcmb构建的三维网络使材料具有高导热性，显著提高了热管理效率。复合膜还具有良好的耐磨性、化学稳定性和自清洁功能，适用于航空电子等领域的保护，为解决航空电子封装问题提供了新的解决方案。

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引用次数: 0

Self-assembly of tripeptides and anticancer drug into nanostructures via synergistic non-covalent interactions for enhanced photodynamic therapy 通过协同非共价相互作用将三肽和抗癌药物自组装成纳米结构用于增强光动力治疗

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-01-31 DOI: 10.1016/j.colsurfa.2026.139788

Maryam Shabbir , Mussarat Tasleem , Lina Lee , Mohamad Akbar Ali , Maria Atiq , Mohamed Ettabib , Mostafa Khair , Dalaver H. Anjum , Manzar Abbas

Among anticancer modalities, photodynamic therapy (PDT) using self-assembled nanomaterials has emerged as a promising non-invasive approach for cancer treatment. However, poor stability, biocompatibility, and a lack of structure-function relationship are real challenges and self-assembled peptide nanoformulations offer an effective strategy to overcome these limitations. In this study, we report the development of peptides-modulated self-assembled nanoparticles of anticancer drug chlorin e6 (Ce-6) and two tripeptides (Ac-IFH-NH₂, NH₂-IFH-COOH) through synergistic effects of non-covalent interactions. The tripeptides act as structural modulators; molecular simulations reveal that electrostatic interactions and π–π stacking are key factors in governing the assembly process. The resulting nanostructures display H-type aggregation, confirming strong interactions between the tripeptides and drug molecules. Compared with free Ce-6, the self-assembled nanoparticles exhibit significantly enhanced photodynamic activity upon light activation, enabling selective cancer cell death. This self-assembly strategy provides a practical and versatile platform to enhance anticancer efficacy and paves the way for developing advanced therapeutics for targeted cancer therapy.

在抗癌方式中，使用自组装纳米材料的光动力疗法（PDT）已成为一种有前途的非侵入性癌症治疗方法。然而，稳定性差、生物相容性差以及缺乏结构-功能关系是真正的挑战，而自组装肽纳米配方提供了克服这些限制的有效策略。在这项研究中，我们报道了通过非共价相互作用的协同作用，开发了肽调控的抗癌药物氯e6 （Ce-6）和两个三肽（Ac-IFH-NH2, NH2-IFH-COOH）自组装纳米颗粒。三肽作为结构调节剂；分子模拟表明，静电相互作用和π -π堆积是控制组装过程的关键因素。所得到的纳米结构显示h型聚集，证实了三肽与药物分子之间的强相互作用。与游离Ce-6相比，自组装纳米颗粒在光激活下表现出显著增强的光动力学活性，使癌细胞选择性死亡。这种自组装策略为提高抗癌疗效提供了一个实用的、多功能的平台，为开发先进的靶向治疗癌症的治疗方法铺平了道路。

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引用次数: 0

Engineering fragmented MXene-derived localized conductive networks in multifunctional cellulose composite aerogel absorbers 多功能纤维素复合气凝胶吸收剂的工程碎片化mxene衍生的局部导电网络

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-01-31 DOI: 10.1016/j.colsurfa.2026.139805

Fangxin Wan , Luyao Ding , Wei Chen , Kejie Chen , Tianyi Hang , Yiming Chen , Shaohua Jiang , Qing Ouyang , Shiju E , Jiajia Zheng

The advancement of modern science and technology has significantly facilitated daily life and societal operations, yet simultaneously contributes to increasing electromagnetic pollution. Cellulose aerogels have shown broad application prospects for electromagnetic wave absorption (EMWA) due to their low density, high porosity, and adjustable structure. In this work, we first obtained fragmented MXene by ultrasonic treatment of flake MXene, and combined it with carboxymethyl cellulose (CMC) to prepare a functional cellulose-based composite aerogel absorber via a straightforward freeze-drying technology. Thanks to the rich surface functional groups of MXene fragments, they could be efficiently attached to the surface of the aerogel skeleton, thus giving the composite aerogel excellent EMWA performance. At an ultrathin matching thickness of 1.52 mm, the absorber achieved highly efficient microwave attenuation with minimum reflection loss of −49.3 dB and effective absorption bandwidth of 4.89 GHz. In addition, the unique porous structure of the composite aerogel endowed it with exceptional thermal insulation and sound absorption capabilities. This work presents a simple and sustainable strategy to develop multifunctional cellulose composite materials for a variety of application scenarios.

现代科学技术的进步极大地便利了人们的日常生活和社会运作，但同时也加剧了电磁污染。纤维素气凝胶具有低密度、高孔隙率和结构可调等特点，在电磁波吸收领域具有广阔的应用前景。在这项工作中，我们首先通过超声波处理片状MXene获得碎片状MXene，并将其与羧甲基纤维素（CMC）结合，通过直接冷冻干燥技术制备功能性纤维素基复合气凝胶吸收剂。由于MXene片段具有丰富的表面官能团，它们可以有效地附着在气凝胶骨架表面，从而使复合气凝胶具有优异的EMWA性能。在1.52 mm的超薄匹配厚度下，吸收器实现了高效的微波衰减，最小反射损耗为- 49.3 dB，有效吸收带宽为4.89 GHz。此外，复合气凝胶独特的多孔结构使其具有优异的隔热和吸声能力。这项工作提出了一种简单和可持续的策略来开发多功能纤维素复合材料的各种应用场景。

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引用次数: 0