Colloids and Surfaces A: Physicochemical and Engineering Aspects最新文献_第3页

Advanced Bi2O3/ZrO2/PVA nanocomposite electrode for sensitive and selective hydrazine detection 新型Bi2O3/ZrO2/PVA纳米复合电极用于联氨的灵敏和选择性检测

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-12-10 DOI: 10.1016/j.colsurfa.2025.139217

Chellakannu Rajkumar , Vellaichamy Balakumar , Shanmugam Vignesh , Khursheed Ahmad , S. Selvarajan , Wan-Young Chung , Tae Hwan Oh

In this study, we report the facile in situ synthesis of a ternary Bi₂O₃/ZrO₂/polyvinyl alcohol (PVA) nanocomposite and its integration into a glassy carbon electrode (GCE)-based electrochemical sensor for the sensitive detection of hydrazine (HZ). The structural, morphological, and optical properties of the nanocomposite were systematically characterized using FTIR, XRD, SEM–EDX, and UV–visible spectroscopy, confirming the formation of highly crystalline nanostructures with a flake-like morphology. The Bi₂O₃/ZrO₂/PVA-modified GCE exhibited superior electrocatalytic performance, attributed to the synergistic interaction among Bi₂O₃, ZrO₂, and PVA, which enhanced electron transfer, increased electroactive surface area, and improved stability. Electrochemical studies, including cyclic voltammetry (CV) and amperometry, revealed a wide linear detection range of 0.2–1.4 μM, a low detection limit of 0.031 μM, and a sensitivity of 18.27 µA µM¹. The electrochemical system also exhibited excellent selectivity against common interfering species, thereby ensuring its reliability for real-sample analysis. The demonstrated performance highlights the promise of Bi₂O₃/ZrO₂/PVA-modified electrodes as scalable sensing platforms. Their integration into Internet of Things (IoT) networks has the potential to enable smart, real-time monitoring of HZ across environmental, industrial, and clinical settings, consequently driving the advancement of next-generation digital sensing technologies.

在这项研究中，我们报道了一种易于原位合成的三元Bi2O3/ZrO2/聚乙烯醇（PVA）纳米复合材料，并将其集成到基于玻碳电极（GCE）的电化学传感器中，用于肼（HZ）的灵敏检测。利用FTIR、XRD、SEM-EDX和uv -可见光谱对纳米复合材料的结构、形貌和光学性能进行了系统表征，证实了形成了具有片状形貌的高结晶纳米结构。Bi2O3/ZrO2/PVA改性的GCE表现出优异的电催化性能，这是由于Bi2O3、ZrO2和PVA之间的协同作用，增强了电子传递，增加了电活性表面积，提高了稳定性。包括循环伏安法（CV）和安培法在内的电化学研究表明，该方法的线性检测范围为0.2 ~ 1.4 μM，检出限为0.031 μM，灵敏度为18.27 µa µM1。该电化学体系对常见的干扰物质也表现出良好的选择性，从而保证了其在实际样品分析中的可靠性。所展示的性能突出了Bi2O3/ZrO2/ pva修饰电极作为可扩展传感平台的前景。将其集成到物联网（IoT）网络中，有可能实现环境、工业和临床环境中HZ的智能实时监测，从而推动下一代数字传感技术的进步。

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引用次数: 0

Electrooxidation of polyacrylamide in the wastewater from molybdenum ore flotation: Resurrecting molybdenite floatability and degradation mechanism 钼矿浮选废水中聚丙烯酰胺的电氧化：恢复辉钼矿的可浮性及降解机理

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-12-10 DOI: 10.1016/j.colsurfa.2025.139231

Longyu Zhang , Junhong Liu , Zepeng Ma , Jinting Sha , Weijun Peng , Yehao Huang , Wei Wang , Yijun Cao , Bingqiao Yang , Nasriddinov Zamoniddin Zainiddinovich

To enable the reuse of molybdenite flotation wastewater, it is necessary to degrade the residual flocculant polyacrylamide (PAM) to eliminate its inhibition on molybdenite floatability. This study adopted electrooxidation technology to degrade PAM and investigate its mechanism as well as its effect on restoring molybdenite flotation. Under optimized conditions (current density: 40 mA/cm², oxidation time: 60 min), the molybdenite recovery in the 10 ppm PAM system increased from 1 % to 96 %, with a total organic carbon (TOC) removal efficiency of 81.39 %. For the artificial mixed ore (molybdenite:quartz = 1:9), after treatment of the system containing 2.5 ppm PAM, the Mo recovery and grade increased from 17 %/10 % to 96 %/27 %, respectively. Characterizations via atomic force microscopy (AFM), contact angle measurement, and Zeta potential analysis confirmed that PAM forms a hydrophilic adsorption layer on the molybdenite surface via hydrogen bonding (evidenced by a contact angle decrease from 85° to 55°). In contrast, electrooxidation degraded PAM into short-chain fragments, reducing the PAM coverage on the molybdenite surface to 10.33 % and restoring the contact angle to 83°, thereby reconstructing hydrophobicity. The degradation pathway involves free radicals (·OH/·Cl/·ClO) attacking the PAM main chain to cause chain scission, generating small-molecule products containing alkenes and esters, which are ultimately mineralized into CO₂, H₂O, and NO₃⁻. This technology provides an efficient solution for flotation wastewater recycling and green mineral processing.

为了实现辉钼矿浮选废水的回用，必须对残留絮凝剂聚丙烯酰胺（PAM）进行降解，以消除其对辉钼矿可浮性的抑制作用。采用电氧化技术降解PAM，研究其降解机理及其对辉钼矿浮选恢复的影响。在优化条件下（电流密度为40 mA/cm²，氧化时间为60 min）， 10 ppm PAM体系中辉钼矿的回收率由1 %提高到96 %，总有机碳（TOC）去除率为81.39 %。对人工混合矿（辉钼矿：石英= 1:9），经含2.5 ppm PAM体系处理后，钼的回收率和品位分别由17 %/10 %提高到96 %/27 %。原子力显微镜（AFM）、接触角测量和Zeta电位分析证实，PAM通过氢键在辉钼矿表面形成亲水吸附层（接触角从85°减小到55°）。相反，电氧化将PAM降解成短链片段，使PAM在辉钼矿表面的覆盖率降低到10.33 %，接触角恢复到83°，从而重建疏水性。降解途径是自由基（·OH/·Cl/·ClO）攻击PAM主链导致链断裂，产生含有烯烃和酯的小分子产物，最终被矿化为CO₂、H₂O和NO₃⁻。该工艺为浮选废水回收利用和绿色选矿提供了有效的解决方案。

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引用次数: 0

Development and performance investigation of a novel fly ash gel foam for mine fire prevention and extinguishment 新型矿用粉煤灰凝胶泡沫材料的研制及性能研究

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-12-10 DOI: 10.1016/j.colsurfa.2025.139234

Hongbiao Li , Ziwei Li , Hongjun Liang , Quanlin Shi , Botao Qin

Given the limitations of conventional two and three-phase foams such as poor water retention and limited thermal stability in coal mine applications, this study presents a novel fly ash-based gel foam for fire prevention and extinguishment. This material integrates the high fluidity of foam with the exceptional water retention and thermal resistance of gel systems. Experimental results show that under optimized conditions namely, 0.3 % concentration each of the composite foaming agent (A+B), gelling agent (G), and crosslinking agent (C), a water-to-ash ratio of 5:1, and a pH between 7 and 8, the fly ash gel foam achieves an expansion ratio of 7–8 times without any observable liquid separation, confirming its superior water retention capacity. Moreover, the foam demonstrated significant fire suppression and cooling performance, effectively inhibiting the low-temperature oxidation of coal through dual mechanisms: endothermic cooling and oxygen isolation. It offers superior resistance to reignition compared to the three-phase foam, highlighting its substantial potential for application in mine fire prevention and control.

鉴于传统的两相泡沫和三相泡沫在煤矿应用中的保水性差、热稳定性有限等局限性，本研究提出了一种新型的粉煤灰基凝胶泡沫用于防火和灭火。这种材料将泡沫的高流动性与凝胶系统的特殊保水性和耐热性结合在一起。实验结果表明，在复合发泡剂（A+B）、胶凝剂(G)和交联剂(C)的浓度分别为0.3 %、水灰比为5:1、pH值为7 ~ 8的优化条件下，粉煤灰凝胶泡沫膨胀率达到7 ~ 8倍，且未出现液体分离现象，证明了粉煤灰凝胶泡沫具有良好的保水性。此外，泡沫具有显著的灭火和冷却性能，通过吸热冷却和氧气隔离双重机制有效地抑制了煤的低温氧化。与三相泡沫相比，它具有更好的耐重燃性，突出了其在矿山防火和控制中的巨大应用潜力。

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引用次数: 0

The mechanism of joint action of fatty acid esters and a compositional pour point depressant on phase formation in diesel fuel 脂肪酸酯与组分降凝剂共同作用于柴油相形成的机理

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-12-10 DOI: 10.1016/j.colsurfa.2025.139229

Kirill A. Kuzmin, Sofia P. Zauzolkova, Artem P. Bogatko, Viacheslav A. Rudko

Despite the global shift towards alternative energy sources, diesel fuel maintains its critical role in key economic sectors; however, its operational efficiency in cold climates is fundamentally constrained by the crystallization of n-paraffins upon temperature decrease. A priority task is the development of effective pour point depressants that prevent the crystallization of paraffins. This work investigates the combined effect of a composite pour point depressant (CPPD) (based on copolymers of maleic anhydride with α-olefins and ethylene with vinyl acetate) and a bioadditive (a mixture of ethyl oleate and ethyl palmitate) on the cold flow properties of diesel fuel. We found that the introduction of 10 wt% bioadditive with an ethyl palmitate content of 23.2 wt%, in combination with 1000 ppm CPPD, induced a significant depression of the cold filter plugging point from −5 °C to −24 °C. This represents a net improvement of 19 °C, substantially exceeding the 4 °C reduction achieved by the PPD alone in diesel fuel. The synergy arises from a dual mechanism: saturated esters act as nucleation sites for paraffins, while unsaturated esters adsorb onto crystals, inhibiting their growth. The polymer depressant co-crystallizes with and adsorbs on these modified crystals, preventing network formation. The obtained results demonstrate the promise of using bioadditives to create diesel fuels resistant to low-temperature operation.

尽管全球转向替代能源，柴油燃料保持其在关键经济部门的关键作用；然而，它在寒冷气候下的运行效率从根本上受到温度降低时正石蜡结晶的限制。当务之急是开发有效的降凝剂，防止石蜡结晶。本文研究了复合降凝剂（CPPD）（基于马来酸酐与α-烯烃的共聚物和乙烯与醋酸乙烯的共聚物）和生物添加剂（油酸乙酯和棕榈酸乙酯的混合物）对柴油冷流动性能的综合影响。我们发现，引入10 wt%的生物添加剂，棕榈酸乙酯含量为23.2 wt%，与1000 ppm的CPPD结合，可以显著降低冷过滤器的堵塞点，从−5°C降至−24°C。这代表了19°C的净改进，大大超过了柴油燃料中PPD单独减少的4°C。这种协同作用来自双重机制：饱和酯作为石蜡的成核位点，而不饱和酯吸附在晶体上，抑制它们的生长。聚合物抑制剂与这些改性晶体共晶并吸附在这些晶体上，防止网络形成。获得的结果表明，使用生物添加剂来制造耐低温操作的柴油燃料是有希望的。

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引用次数: 0

Influence of initial microfabric on one-dimensional compression of saturated kaolin: Insights from a bottom-up coarse-grained model 初始微结构对饱和高岭土一维压缩的影响：来自自下而上粗粒度模型的见解

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-12-09 DOI: 10.1016/j.colsurfa.2025.139228

Yijie Wang, Zhen-Yu Yin, Pengchang Wei

Simulating clay behavior is crucial in various engineering applications. However, due to the inherent complexity of clay’s structure and multi-scale interactions, modeling these behaviors presents challenges. This study employs a bottom-up coarse-grained simulation method to investigate the one-dimensional compression behavior of saturated kaolin, with a focus on the impact of initial microfabric. This approach directly derives coarse-grained particle-particle interactions from atomistic simulations, bypassing the need for cumbersome experimental calibration. In the atomic model, kaolinite is represented as a hexagonal platelet with explicit negative surface charges. In the coarse-grained model, the different basal and edge surfaces of kaolinite are distinguished, and the coarse-grained potential for the clay-water system is refined accordingly. On this basis, the resulting coarse-grained model effectively captures the compression behavior of kaolin. The simulated system reaches the micrometer scale. Four cases with different initial microfabrics were examined, successfully reproducing the “house-of-cards” and “band-type” structures in the clay. Comparison of the void ratio with experimental data validates the reliability of the simulation procedure and highlights the necessity of accounting for surface charges. The results show that compressibility is significantly influenced by the randomness of particle orientation and the alignment of particle planes with the compression direction. The study also explores how the initial fabric affects the evolution of kaolinite tactoids and the evolution of pore size and roundness during consolidation. The proposed method strikes a balance between capturing microscopic mechanisms and maintaining computational efficiency, offering a promising approach for simulating complex clay behaviors.

模拟粘土的行为在各种工程应用中是至关重要的。然而，由于粘土结构固有的复杂性和多尺度相互作用，对这些行为的建模提出了挑战。本研究采用自底向上的粗粒度模拟方法研究饱和高岭土的一维压缩行为，重点研究初始微组构的影响。这种方法直接从原子模拟中推导出粗粒度的粒子-粒子相互作用，而不需要繁琐的实验校准。在原子模型中，高岭石被表示为表面带明显负电荷的六角形血小板。在粗粒模型中，区分了不同的高岭石基面和边缘面，从而细化了粘土-水体系的粗粒势。在此基础上，得到的粗粒度模型有效地捕获了高岭土的压缩行为。仿真系统达到微米尺度。研究人员测试了四种不同初始微织物的情况，成功地再现了粘土中的“纸牌屋”和“带状”结构。空隙率与实验数据的对比验证了模拟过程的可靠性，并强调了考虑表面电荷的必要性。结果表明，颗粒方向的随机性和颗粒平面与压缩方向的对齐对压缩性能有显著影响。研究还探讨了初始结构对固结过程中高岭石黏结样的演化以及孔隙大小和圆度的演化的影响。所提出的方法在捕捉微观机制和保持计算效率之间取得了平衡，为模拟复杂的粘土行为提供了一种有前途的方法。

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引用次数: 0

Shape-engineered membrane pores enable droplet unplugging in oil-water separation 形状工程膜孔使液滴在油水分离中不堵塞

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-12-09 DOI: 10.1016/j.colsurfa.2025.139204

Qiuyan Wang , Yuan Sun , Awais Mahmood , Yuchen He , Dong Liu

Oil-water separation is critical for wastewater treatment, environmental protection, and oil recovery. Although multiple separation techniques exist, such as centrifugation, gravity-based methods, electrokinetics, photocatalysis, and skimming, membrane-based approaches have shown particular promise owing to their high efficiency, low energy requirements, and operational simplicity. Nevertheless, membrane fouling and pore clogging by oil droplets remain significant challenges in emulsion separation, often requiring high external pressures due to membrane pore constraints. To address these challenges, elucidating droplet plugging mechanisms and designing membrane pore structures that enable spontaneous unidirectional oil transport are crucial. Whereas conventional approaches predominantly emphasize wettability enhancement and pore size optimization to prevent clogging, we demonstrate through systematic computational simulations that precisely engineered pore geometries can induce Laplace pressure differentials on obstructing droplets. This fundamental discovery establishes that strategic pore geometry design can effectively drive spontaneous unidirectional droplet transport through the membrane architecture. This study examines how pore geometry influences droplet transport dynamics, revealing its decisive role in mitigating pore blockage. The findings not only deepen mechanistic understanding of droplet-induced fouling but also propose an innovative pore design strategy that promotes directional droplet motion, thereby significantly advancing membrane separation performance.

油水分离是污水处理、环境保护和采油的关键。尽管存在多种分离技术，如离心、重力法、电动力学、光催化和脱脂，但基于膜的方法由于其高效率、低能量要求和操作简单而显示出特别的前景。尽管如此，油滴造成的膜污染和孔隙堵塞仍然是乳状液分离的重大挑战，由于膜孔隙的限制，通常需要较高的外部压力。为了解决这些挑战，阐明液滴堵塞机制和设计能够实现自发单向石油输送的膜孔结构至关重要。传统方法主要强调增强润湿性和优化孔隙大小以防止堵塞，但我们通过系统的计算模拟证明，精确设计的孔隙几何形状可以在阻塞液滴上诱导拉普拉斯压力差。这一基本发现表明，战略性孔隙几何设计可以有效地驱动液滴通过膜结构的自发单向传输。本研究考察了孔隙几何形状对液滴传输动力学的影响，揭示了其在缓解孔隙堵塞方面的决定性作用。这些发现不仅加深了对液滴诱导污染机理的理解，而且提出了一种创新的孔隙设计策略，可以促进液滴的定向运动，从而显著提高膜的分离性能。

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引用次数: 0

Ga2O3-ZnO/palygorskite-based SAPO-34 molecular sieves for catalytic hydrogenation of CO2 to light olefins 基于Ga2O3-ZnO/坡高岭土的SAPO-34分子筛催化CO2加氢制轻质烯烃

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-12-09 DOI: 10.1016/j.colsurfa.2025.139208

Shihu Zhang , Mengxi Cao , Jing Luo , Yue Li , Haifeng Tian

Palygorskite has found wide application in catalysis due to its distinctive physicochemical properties and abundant reserves in recent years. The SAPO-34 molecular sieves were synthesized through an innovative approach within this research, utilizing palygorskite calcined at different temperatures as both a silicon source and a partial supplier of aluminum by combining them with Ga₂O₃-ZnO oxide to create tandem catalysts in the hydrogenation of CO₂ to light olefins. A comprehensive structure-performance relationship of catalysts was established through in-depth analyses with multiple characterization techniques. The SAPO-34 molecular sieve derived from palygorskite calcined at 750°C exhibited a superior crystalline structure, acidic properties, and abundant pore structure. The Ga₂O₃-ZnO/palygorskite-based SAPO-34 molecular sieves tandem catalyst provides superior conditions for the adsorption and activation of CO₂, along with the conversion of reaction intermediates. By using in-situ Diffuse Reflectance Infrared Fourier Transform Spectroscopy, the reaction pathway of hydrogenation of CO₂ is consistent with a formate-methoxy pathway. This research not only successfully developed a green and economically efficacious catalyst in the hydrogenation process of CO₂, but also provided valuable data support and theoretical guidance for subsequent optimization design of the catalyst through rigorous structural characterization and performance evaluation, exhibiting extensive application prospects.

近年来，坡缕石以其独特的理化性质和丰富的储量在催化领域得到了广泛的应用。SAPO-34分子筛是在本研究中通过一种创新的方法合成的，利用在不同温度下煅烧的坡长石作为硅源和铝的部分供应商，将它们与Ga2O3-ZnO氧化物结合，形成串联催化剂，用于二氧化碳加氢制轻质烯烃。通过多种表征技术的深入分析，建立了全面的催化剂结构-性能关系。在750°C下煅烧得到的坡长石分子筛SAPO-34具有优异的晶体结构、酸性和丰富的孔隙结构。基于Ga2O3-ZnO/坡高岭土的SAPO-34分子筛串联催化剂为CO2的吸附和活化以及反应中间体的转化提供了优越的条件。通过原位漫反射红外傅立叶变换光谱分析，CO2加氢反应路径符合甲酸-甲氧基反应路径。本研究不仅成功开发出一种绿色经济的CO2加氢过程催化剂，而且通过严格的结构表征和性能评价，为后续催化剂的优化设计提供了宝贵的数据支持和理论指导，具有广阔的应用前景。

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引用次数: 0

Fluorographene-derived colloidal dispersions for donepezil delivery: From chemical synthesis to engineering of drug carriers 用于多奈哌齐输送的氟烯衍生胶体分散体：从化学合成到药物载体的工程设计

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-12-09 DOI: 10.1016/j.colsurfa.2025.139225

Sofia-Anna Ntousi , Martin Pykal , Maria-Anna Gatou , Vítězslav Hrubý , Paraskevi Papakyriakopoulou , Sergii Kalytchuk , Themistoklis Aivaliotis , Nefeli Lagopati , Pavlos Pantelis , Evangelia A. Pavlatou , Vassilis G. Gorgoulis , Natassa Pippa , Demetrios D. Chronopoulos

Fluorinated graphene oxide (FGO) colloidal dispersions have recently emerged as promising drug delivery systems. In this study, graphene acid (GA) and its partially fluorinated counterpart (FGA) were synthesized and characterized comprehensively. Both GA and FGA formed stable colloidal dispersions in phosphate-buffered saline (PBS, 1 mg/mL) after sonication, with particle size and surface charge strongly influenced by surface chemistry and interparticle interactions. Biocompatibility tests indicated that neither GA nor FGA exhibits cytotoxicity, as high cell viability remained across all tested concentrations. Donepezil (Don) was chosen as a model Active Pharmaceutical Ingredient (API) in order to evaluate the drug-loading capacity of FGA. Simple mixing of FGA with Don resulted in efficient drug loading, while molecular dynamic and quantum-chemical studies provided molecular-level insight into FGA-donepezil interactions. Overall, these findings demonstrate that FGA is a biocompatible nanocarrier with potential added value for pharmaceutical applications.

氟化氧化石墨烯（FGO）胶体分散体最近成为一种很有前途的药物递送系统。本研究合成了石墨烯酸（GA）及其部分氟化对应物（FGA），并对其进行了综合表征。超声处理后，GA和FGA在磷酸盐缓冲盐水（PBS, 1 mg/mL）中均形成稳定的胶体分散体，其粒径和表面电荷受表面化学和颗粒间相互作用的强烈影响。生物相容性测试表明，GA和FGA都没有表现出细胞毒性，因为在所有测试浓度下都保持高细胞活力。以多奈哌齐（Donepezil, Don）为模型活性药物成分（API），评价FGA的载药能力。FGA与Don的简单混合导致了有效的药物装载，而分子动力学和量子化学研究提供了FGA与多奈哌齐相互作用的分子水平的见解。总之，这些发现表明FGA是一种具有生物相容性的纳米载体，具有潜在的制药应用附加价值。

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引用次数: 0

Magnesium and copper co-substituted bovine bone-derived hydroxyapatite: A sustainable and functional coating for CFR-PEEK implants 镁和铜共取代牛骨源羟基磷灰石：CFR-PEEK植入物的可持续和功能性涂层

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-12-09 DOI: 10.1016/j.colsurfa.2025.139226

Peng Qiu , Vincent Bennani , Paul R. Cooper , George Dias , Erwin Lamping , Jithendra Ratnayake

Background

The clinical application of carbon fibre-reinforced polyetheretherketone (CFR-PEEK) implants is limited by their insufficient osteogenic and antibacterial properties.

Objective

To produce Mg²⁺ and Cu²⁺ co-substituted bovine bone-derived hydroxyapatite (BHAMgCu) coatings to improve the osteogenic and antibacterial properties of CFR-PEEK implants.

Methods

Three kinds of BHAMgCu powder with varying Mg²⁺ and Cu²⁺ ratios were synthesized and their cytotoxic properties were investigated. The BHAMgCu-coated CFR-PEEK (SCP-BHAMgCu) samples were produced with a polydopamine-assisted coating method. The surface characterization and the osteogenic and antibacterial properties of the SCP-BHAMgCu samples were investigated in vitro.

Significant findings

The BHAMgCu powder with 10 % Mg²⁺ and 5 % Cu²⁺ ion substitutions showed good cytocompatibility. The SCP-BHAMgCu samples exhibited improved surface roughness with increased hydrophilicity and coating bond strength. The SCP-BHAMgCu samples not only supported adhesion, proliferation, and osteogenic activity of Saos-2 cells, but they also exhibited antibacterial properties and significantly inhibited the growth of Escherichia coli and Staphylococcus aureus.

碳纤维增强聚醚醚酮（CFR-PEEK）种植体的成骨和抗菌性能不足，限制了其临床应用。目的制备Mg2+和Cu2+共取代的牛骨源羟基磷灰石（BHAMgCu）涂层，提高CFR-PEEK种植体的成骨性能和抗菌性能。方法合成3种不同Mg2+和Cu2+配比的BHAMgCu粉末，并对其细胞毒性进行研究。采用聚多巴胺辅助包覆法制备bhamgcu包覆CFR-PEEK （SCP-BHAMgCu）样品。体外研究了SCP-BHAMgCu样品的表面表征、成骨和抗菌性能。结果表明：10 % Mg2+和5 % Cu2+离子取代的BHAMgCu粉末具有良好的细胞相容性。SCP-BHAMgCu样品的表面粗糙度有所改善，亲水性和涂层结合强度也有所提高。SCP-BHAMgCu样品不仅支持Saos-2细胞的粘附、增殖和成骨活性，而且还具有抗菌性能，并显著抑制大肠杆菌和金黄色葡萄球菌的生长。

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引用次数: 0

Microalgae-derived cellulose nanofibrils from Chlorella Prenoidosa residue for modulating physicochemical characteristics of pickering emulsions 小球藻残渣微藻衍生纤维素纳米原纤维对酸洗乳理化特性的调节作用

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-12-09 DOI: 10.1016/j.colsurfa.2025.139171

Zichen Wang , Yijun Liu , Lijing Long , Jinjie Tian , Yanan Zhang , Shuwei Tang , Zichao Li , Haixin Sun

The physicochemical characteristics of Pickering emulsions, particularly droplet size, stability, and microstructure, play critical roles in determining their functional performance in food, pharmaceutical, and cosmetic applications. In this study, filamentous and entangled cellulose nanofibrils (CNF) obtained from Chlorella pyrenoidosa residue, a microalgal by-product rich in cellulose, using ultrasonication. The extracted CNF were incorporated into cellulose nanocrystal (CNC)-stabilized Pickering emulsions to investigate their role as structural modifiers for tuning droplet size, rheological behavior, and environmental stability. Results showed that increasing CNC/CNF ratios led to a reduction in droplet size (from 37 μm to 21 μm) and enhanced viscosity and storage stability of the emulsions, attributed to the formation of a three-dimensional fibrillar network within the aqueous phase. Moreover, emulsions stabilized with CNC/CNF blends (1:0.5 and 1:1, w/w) exhibited excellent tolerance to environmental stresses, maintaining stability across a wide pH range (3−11) and under ionic strengths up to 100 mM NaCl. These findings highlight the synergistic effect between CNC and CNF in both interfacial and bulk-phase stabilization, and underscore the potential of microalgae-derived nanocellulose as a sustainable and effective physical structuring agent. This work provides valuable insights into the valorization of marine biomass for developing environmentally stable Pickering emulsions in colloidal and soft material systems.

皮克林乳剂的物理化学特性，特别是液滴大小、稳定性和微观结构，在决定其在食品、制药和化妆品应用中的功能性能方面起着关键作用。本研究利用超声法从富含纤维素的微藻副产品小球藻（Chlorella pyrenoidosa）残渣中提取丝状和纠缠状的纤维素纳米原纤维（CNF）。将提取的CNF加入到纤维素纳米晶（CNC）稳定的皮克林乳液中，研究其作为结构调节剂调节液滴大小、流变行为和环境稳定性的作用。结果表明，CNC/CNF比例的增加导致乳液的尺寸减小（从37 μm减小到21 μm），并提高了乳液的粘度和储存稳定性，这是由于在水相中形成了三维纤维网络。此外，用CNC/CNF共混物（1:0.5和1:1，w/w）稳定的乳液对环境应力表现出优异的耐受性，在很宽的pH范围（3−11）和高达100 mM NaCl的离子强度下保持稳定性。这些发现强调了CNC和CNF在界面和体相稳定方面的协同效应，并强调了微藻衍生的纳米纤维素作为一种可持续和有效的物理结构剂的潜力。这项工作为在胶体和软材料系统中开发环境稳定的皮克林乳液提供了宝贵的见解。

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