Colloids and Surfaces A: Physicochemical and Engineering Aspects最新文献_第2页

Fabrication and antimicrobial performance of ZnO/SiO₂ composite superhydrophobic coatings ZnO/ sio2复合超疏水涂层的制备及其抗菌性能

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-01-13 DOI: 10.1016/j.colsurfa.2026.139574

Chencheng Wang , Shuce Zhou , Lixiong Zhang , Minxue Wang , Lee Li , Wenhua Wu , Xuezong Wang

Composite insulators operating in warm and humid climates are highly susceptible to microbial contamination, particularly the adhesion of green algae, which leads to the degradation of surface hydrophobicity and insulation performance. To address this issue, a ZnO/SiO₂ composite superhydrophobic coating was designed and fabricated in this study. Through the synergistic action of a primer–topcoat gradient architecture, the coating integrates a physical water-repelling barrier with the intrinsic antibacterial functionality of ZnO, enabling dual protection. The coating was fabricated by combining a sol–gel synthesis of ZnO/SiO₂ nanocomposites with a layered spraying process to build a primer–topcoat structure. The results show that the coating effectively suppresses the adhesion of green algae and the formation of biofilms through physical repulsion from the rough surface and chemical inhibition arising from the sustained release of Zn²⁺ ions and the photocatalytic generation of reactive oxygen species (ROS) by ZnO nanoparticles. Corrosion-resistance tests further confirm the coating’s stability under highly acidic and alkaline conditions. In addition to its antifouling and antibacterial capabilities, the coating also exhibits favorable electrical properties. Measurements indicate a relative permittivity of 2.39 and a resistivity of 9.7 × 10 ¹⁰ Ω·m under power-frequency conditions, demonstrating that the coating maintains good dielectric performance required for insulator applications. Collectively, this work presents a new protective strategy for composite insulators, offering the combined advantages of superhydrophobicity, long-term antimicrobial activity, and reliable electrical performance.

复合绝缘子在温暖潮湿的气候下工作，极易受到微生物污染，特别是绿藻的附着，导致表面疏水性和绝缘性能下降。为了解决这一问题，本研究设计并制备了ZnO/SiO 2复合超疏水涂层。通过底漆-面漆梯度结构的协同作用，该涂层将物理防水屏障与ZnO固有的抗菌功能结合在一起，实现双重保护。采用溶胶-凝胶法制备ZnO/SiO₂纳米复合材料，并采用分层喷涂工艺构建底漆面漆结构。结果表明，该涂层通过粗糙表面的物理斥力和Zn 2 +离子的持续释放以及ZnO纳米粒子光催化生成活性氧（ROS）产生的化学抑制，有效抑制了绿藻的粘附和生物膜的形成。耐腐蚀试验进一步证实了该涂层在强酸性和强碱性条件下的稳定性。除了防污和抗菌外，该涂层还具有良好的电性能。测量表明，在工频条件下，相对介电常数为2.39，电阻率为9.7 × 10 ¹⁰Ω·m，表明该涂层保持绝缘体应用所需的良好介电性能。总的来说，这项工作提出了一种新的复合绝缘子保护策略，提供了超疏水性，长期抗菌活性和可靠的电气性能的综合优势。

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引用次数: 0

Unravelling the doping of ruthenium in praseodymium oxysulfide for electrocatalytic producing hydrogen 揭示钌在氧化硫化镨中掺杂用于电催化制氢

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-01-13 DOI: 10.1016/j.colsurfa.2026.139583

Zhou Yang , Tao Yang , Jingxuan Sun , Jiaqi Xiong , Zhiqian Zhang , Shuang Dong

Hydrogen is a highly promising sustainable energy source; it can be produced by electrocatalytic water splitting, but searching for an efficient electrocatalyst is still a challenge. Herein, the rare-earth metal praseodymium (Pr) was used to form Pr₁₀S₁₄O, and the ruthenium (Ru) was introduced into Pr₁₀S₁₄O. The FE-SEM, TEM, XRD, and XPS were performed to analyze the morphologies and chemical properties of Ru-doped Pr₁₀S₁₄O. Besides, we probed the influences of doping temperature and content of Ru on electrocatalytic performances by the orthogonal experiment, and concluded that the kinetics of OER and HER are increased with the doping content of Ru, while the overpotentials of OER and HER are decreased with the doping temperature of Ru. The 30 %Ru-Pr₁₀S₁₄O-70 shows the superior performances with a low OER potential of 1.50 V at 10 mA cm⁻² and a low HER overpotential of 44 mV at 10 mA cm⁻², as well as a low Tafel slope and small impedance. This work provides a considerable reference for rare-earth-based electrocatalysts for water splitting in producing hydrogen.

氢是一种非常有前途的可持续能源；它可以通过电催化水分解来生产，但寻找一种高效的电催化剂仍然是一个挑战。本文采用稀土金属镨（Pr）制备Pr10S14O，并在Pr10S14O中引入钌（Ru）。采用FE-SEM、TEM、XRD和XPS等手段分析了钌掺杂Pr10S14O的形貌和化学性质。此外，我们通过正交实验探讨了掺杂温度和Ru含量对电催化性能的影响，得出OER和HER的动力学随Ru掺杂含量的增加而增加，而OER和HER的过电位随Ru掺杂温度的增加而降低的结论。30 %Ru-Pr10S14O-70表现出优异的性能，在10 mA cm−2时OER电位为1.50 V，在10 mA cm−2时HER过电位为44 mV，塔非尔斜率低，阻抗小。本研究为稀土电催化剂的水裂解制氢提供了参考。

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引用次数: 0

Si-doped BN aerogels with enhanced strength and methyl orange adsorption performance 具有增强强度和甲基橙吸附性能的掺硅BN气凝胶

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-01-13 DOI: 10.1016/j.colsurfa.2026.139581

Xiang Li , Yanjun Li , Donghua Liu , Jin Chen , Zhongqi Shi , Donghai Ding , Guoqing Xiao

In this study, silicon-doped boron nitride (BN/Si) aerogels were synthesized via freeze-drying followed by high-temperature nitridation for efficient adsorption of methyl orange (MO) from wastewater. By Si doping, the structure of turbostratic BN (t-BN) was modulated, the interplanar spacing was increased from 0.361 to 0.386 nm, the average atomic layer was reduced from 5.3 to 4.1, and the hydroxyl groups were enriched, thereby the adsorption site was enhanced. Furthermore, α-Si₃N₄ can be evidenced. The resulting BN/Si aerogel exhibits a high specific surface area of 1263.3 m²·g⁻¹, surpassing that of the undoped BN aerogel by 20 %. The strength of the BN aerogel was increased by the α-Si₃N₄ particles between the BN ribbons. The adsorption process follows pseudo-second-order kinetics (R²>0.99) and the Freundlich isotherm, while the BN/Si aerogel exhibits a high MO adsorption capacity of 421.941 mg·g⁻¹, indicating chemisorption dominated heterogeneous multilayer adsorption. Theoretical calculations with the DREIDING force field revealed a higher adsorption energy (-4.80 eV) for BN/Si aerogel, confirming that Si doping enhances adsorption by optimizing the structure and chemistry. The BN/Si aerogel prepared in this work exhibited significant potential for water purification.

本研究采用冷冻干燥+高温硝化法制备掺硅氮化硼（BN/Si）气凝胶，用于高效吸附废水中的甲基橙（MO）。通过Si掺杂，调节了透平BN （t-BN）的结构，使其面间距从0.361增加到0.386 nm，平均原子层数从5.3减少到4.1，羟基富集，从而增强了吸附位点。此外，α-Si3N4可以得到证实。所得的BN/Si气凝胶具有1263.3 m2·g−1的高比表面积，比未掺杂的BN气凝胶高出20 %。氮化硼带间α-Si3N4颗粒的加入提高了氮化硼气凝胶的强度。吸附过程符合拟二级动力学（R2>0.99）和Freundlich等温线，而BN/Si气凝胶对MO的吸附量高达421.941 mg·g−1，表明化学吸附为主的非均相多层吸附。基于dreding力场的理论计算表明，BN/Si气凝胶具有更高的吸附能（-4.80 eV），证实了Si掺杂通过优化结构和化学性质来增强吸附。本研究制备的BN/Si气凝胶在水净化方面具有显著的潜力。

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引用次数: 0

Environmentally friendly post-CMP cleaning of ceria nanoparticles with different structures and surface activities 具有不同结构和表面活性的氧化铈纳米颗粒的环境友好型cmp后清洗

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-01-13 DOI: 10.1016/j.colsurfa.2026.139570

Uiseok Hwang , Sunyoung Kim , Jakyeong Koo , Soochan Kim , Jae-Do Nam , Jaeuk Sung

The surface activity of ceria nanoparticles (NPs), defined by the Ce³⁺/Ce⁴⁺ ratio, plays a critical role in determining the silicon oxide removal rate during chemical mechanical planarization (CMP). While a higher Ce³⁺ content promotes Ce–O–Si bond formation for effective oxide removal, these strong bonds hinder residual particle removal during post-CMP cleaning, often requiring hazardous diluted hydrofluoric acid (DHF). In this study, we propose two environmentally benign alternatives—etidronic acid (EA)–H₂O₂ and KOH solutions—and evaluate their cleaning efficiency against conventional DHF. Using nanoclustered (NC)- and cubic fluorite (CF)-structured ceria NPs, we demonstrate that NC-ceria enables more effective post-CMP cleaning due to its enhanced surface activity. Both EA–H₂O₂ and KOH solutions achieve comparable cleaning performance to DHF solution while minimizing substrate damage. These findings highlight the importance of ceria surface chemistry and offer a sustainable route to improve post-CMP cleaning in precision semiconductor manufacturing.

由Ce3+/Ce4+比值决定的二氧化硅纳米颗粒（NPs）的表面活性是决定化学机械刨平（CMP）过程中氧化硅去除率的关键因素。虽然较高的Ce3+含量促进Ce-O-Si键形成以有效去除氧化物，但这些强键阻碍了cmp后清洗过程中残留颗粒的去除，通常需要危险的稀释氢氟酸（DHF）。在这项研究中，我们提出了两种环境友好的替代品——乙地膦酸(EA) -H2O2和KOH溶液，并评估了它们对传统DHF的清洁效率。使用纳米簇状（NC）和立方萤石（CF）结构的氧化铈NPs，我们证明了NC-ceria由于其增强的表面活性而能够更有效地进行cmp后清洁。EA-H2O2和KOH溶液的清洁性能与DHF溶液相当，同时最大限度地减少了对基材的损害。这些发现突出了二氧化铈表面化学的重要性，并为改善精密半导体制造中的cmp后清洁提供了一条可持续的途径。

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引用次数: 0

Waste straw-derived N-doped magnetic activated carbon toward efficient adsorption of anionic/cationic heavy metal 废秸秆衍生n掺杂磁性活性炭对阴离子/阳离子重金属的高效吸附

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-01-13 DOI: 10.1016/j.colsurfa.2026.139565

Chengyu Li , Qihang Wang , Lingshun Zeng , Kunxiang Zhang , Jun Mu

Activated carbon plays a crucial role in heavy metal remediation, but its adsorption performance is strongly limited by weak surface chemistry and barren pore structure. Herein, we developed a novel Fe/N co-doped porous activated carbon from waste corn straw for efficient adsorption of anionic Cr(VI) and cationic Pb(II). The obtained FeN_0.5PAC-800 exhibits high specific surface area (503.41 m²/g), rich Fe/N functional groups, and high saturation magnetization (70.03 emu/g). The excellent surface chemistry and pore structure of FeN_0.5PAC-800 enable it to exhibit high adsorption capacity for Cr(VI) (283.30 mg/g) and Pb(II) (197.50 mg/g) within 50 min, with remarkable stability against co-existing ions. Furthermore, the magnetic separation properties make it possible to achieve efficient recovery of the powder adsorbent. Moreover, FeN_0.5PAC-800 shows exceptional continuous adsorption capability, enabling sustained purification of 16.94 L for Cr(VI) and 13.02 L for Pb(II). The Thomas, Yoon-Nelson, and Adams-Bohart models revealed that the bed saturation rate of FeN_0.5PAC-800 is closely related to flow rate and initial concentration. The mechanism study indicates that the multiple interactions between FeN_0.5PAC-800 and Cr(VI)/Pb(II) are the key to achieving efficient adsorption. This work proposes an effective approach for eco-friendly environmental remediation by utilizing waste-derived materials to efficiently remove both cationic and anionic heavy metal contaminants.

活性炭在重金属修复中起着至关重要的作用，但其吸附性能受到表面化学性质弱和孔隙结构贫瘠的强烈限制。在此，我们开发了一种新型的Fe/N共掺杂多孔活性炭，用于高效吸附阴离子Cr（VI）和阳离子Pb（II）。所得FeN0.5PAC-800具有高比表面积（503.41 m2/g）、丰富的Fe/N官能团和高饱和磁化强度（70.03 emu/g）的特点。FeN0.5PAC-800优异的表面化学性质和孔隙结构使其在50 min内对Cr(VI)（283.30 mg/g）和Pb(II)（197.50 mg/g）具有较高的吸附能力，对共存离子具有显著的稳定性。此外，磁选特性使粉体吸附剂的高效回收成为可能。此外，FeN0.5PAC-800表现出优异的连续吸附能力，对Cr（VI）的持续净化量为16.94 L，对Pb（II）的持续净化量为13.02 L。Thomas、Yoon-Nelson和Adams-Bohart模型表明，FeN0.5PAC-800的床层饱和速率与流速和初始浓度密切相关。机理研究表明，FeN0.5PAC-800与Cr(VI)/Pb（II）的多重相互作用是实现高效吸附的关键。本研究提出了一种利用废物来源材料高效去除阳离子和阴离子重金属污染物的生态环境修复方法。

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引用次数: 0

High-strength cellulose nanocrystal-based chiral photonic film 基于高强度纤维素纳米晶体的手性光子薄膜

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-01-13 DOI: 10.1016/j.colsurfa.2026.139579

Jia-xu Guo , Yue Zhang , Hai-chao Li , De-qiang Li , Jun Li

The twisted structure of cellulose nanocrystals (CNCs) endows them with the ability to form a cholesteric phase and, consequently, a photonic crystal film through evaporation-induced self-assembly (EISA). However, the physically force-dominated CNCs-based chiral photonic film (CCPF) exhibits obvious defects such as brittleness and water solubility. Here, we combine EISA with covalent crosslinking to prepare CCPFs via the Schiff base reaction between dialdehyde cellulose nanocrystals (ACNCs) and polyethyleneimine (PEI). Compared with the ACNCs film, ACNCs-PEI CCPFs demonstrate a significant increase in tensile strength (∼101 MPa) and elongation at break (1.31 %). After immersion in acidic, neutral, and alkaline solutions for 24 h, the as-prepared CCPFs can still retain their original shape. The CCPFs also exhibit left-handed chirality and excellent UV-blocking properties. Surprisingly, the abundant sub-fluorescent groups and crosslink-enhanced emission effect give CCPFs exceptional photoluminescence behavior. Overall, this work offers a method to produce high-tensile-strength CCPFs by combining covalent cross-linking with EISA, which can be extended to other hybrid CCPFs containing polyamine compounds.

纤维素纳米晶体（CNCs）的扭曲结构使其具有形成胆甾相的能力，从而通过蒸发诱导自组装（EISA）形成光子晶体膜。然而，物理力主导的cncs手性光子膜（CCPF）存在明显的脆性和水溶性等缺陷。在这里，我们将EISA与共价交联结合，通过双醛纤维素纳米晶体（acnc）和聚乙烯亚胺（PEI）之间的希夫碱反应制备了CCPFs。与acnc膜相比，acnc - pei ccpf具有显著的抗拉强度（~ 101 MPa）和断裂伸长率（1.31 %）。在酸性、中性和碱性溶液中浸泡24 h后，制备的ccpf仍能保持其原始形状。ccpf还表现出左手手性和优异的紫外线阻挡性能。令人惊讶的是，丰富的亚荧光基团和交联增强的发射效应使ccpf具有特殊的光致发光行为。总的来说，这项工作提供了一种通过将共价交联与EISA结合来制备高拉伸强度ccpf的方法，该方法可以扩展到其他含有多胺化合物的杂化ccpf。

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引用次数: 0

Study on the behavior of droplet impacting and wetting on the coal dust surface in the presence of sodium dodecyl sulfate 十二烷基硫酸钠存在下煤尘表面液滴冲击和润湿行为的研究

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-01-13 DOI: 10.1016/j.colsurfa.2026.139557

Bingyou Jiang , Huilei Liu , Gaochao Pan , Shulei Shi , Bo Ren , Jie Wang , Wenhan Tao

The impact dynamics of surfactant-laden droplets on dusty surfaces play a critical role in optimizing spray-based dust suppression systems. In this study, the interactions between sodium dodecyl sulfate (SDS)-containing droplets and coal flakes were investigated using high-speed imaging, while numerical simulations were employed to validate the droplet behavior and velocity evolution. The results revealed oscillatory decreases in droplet height and contact angle, accompanied by the expansion of the three-phase contact line—findings that were consistent with the simulation results. Two distinct droplet states were identified: the maximum diffusion state (

β_{\max}

) and the steady-state (

β_{e}

). Quantitative analysis demonstrated that it exhibits a positive correlation with the Weber number, while it scales with the Reynolds number. Increasing both the impact velocity and SDS concentration enhanced the diffusion and penetration rates but reduced their respective durations. Dynamic force analysis further indicated that impact forces primarily drive droplet spreading, whereas oscillatory forces induce expansion–contraction behavior and suppress penetration. These findings provide essential theoretical insights for improving the performance and efficiency of spray-based dust suppression technologies.

负载表面活性剂的液滴对含尘表面的冲击动力学在优化喷雾抑尘系统中起着至关重要的作用。本文采用高速成像技术研究了十二烷基硫酸钠（SDS）液滴与煤片的相互作用，并采用数值模拟方法验证了液滴的行为和速度演化。结果表明，液滴高度和接触角振荡下降，三相接触线扩展，与模拟结果一致。确定了两种不同的液滴状态：最大扩散状态（βmax）和稳态状态（βe）。定量分析表明，它与韦伯数呈正相关，而与雷诺数成比例。增加冲击速度和SDS浓度均能提高扩散和穿透速度，但会缩短其持续时间。动态力分析进一步表明，冲击力主要驱动液滴扩散，而振荡力则诱导膨胀-收缩行为并抑制渗透。这些发现为提高喷雾抑尘技术的性能和效率提供了重要的理论见解。

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引用次数: 0

Study on anti-fibrillation properties and functionality of collagen-modified Lyocell fibers 胶原修饰Lyocell纤维抗颤性能及功能研究

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-01-13 DOI: 10.1016/j.colsurfa.2026.139582

Sen Tong , Hai Wang , Xiaoxiao Li , Lin Tang , Xiaobo Ye , Ming Yang , Jun Jiang , Xiongwei Dong , Xiang Li

Lyocell fiber, recognized as a green regenerated cellulose fiber, has garnered attention due to its excellent properties. However, its tendency towards fibrillation limits its application in high-end textiles. Our study proposes an in-situ crosslinking modification strategy by introducing collagen into the Lyocell fibers. Characterizations confirmed the successful crosslinking of collagen with cellulose chains via esterification reactions, forming a continuous coating on the fiber surface and achieving uniform distribution within the fiber matrix. For 5 wt% collagen addition, the fibers exhibited well performance: the breaking strength increased to 3.21 cN/dtex, the equilibrium moisture regain improved to 18.7 %, and fibrillation was effectively suppressed. Cytocompatibility evaluation demonstrated biocompatibility of the modified fibers, with a relative growth rate (RGR) of 107.19 % and a cell adhesion rate enhanced to 43.85 %, signifying a functional transition from bio-inert to bio-active. Our work provides a novel modification approach for developing high-performance and functional green Lyocell fiber products.

莱赛尔纤维是公认的绿色再生纤维素纤维，因其优异的性能而备受关注。然而，它的纤颤倾向限制了它在高端纺织品中的应用。我们的研究提出了一种原位交联改性策略，将胶原蛋白引入莱赛尔纤维中。表征证实，通过酯化反应，胶原蛋白与纤维素链成功交联，在纤维表面形成连续涂层，并在纤维基体内实现均匀分布。当胶原添加量为5 wt%时，纤维的断裂强度提高到3.21 cn / dtexs，平衡回潮率提高到18.7 %，纤维的纤颤得到有效抑制。细胞相容性评价表明，改性纤维具有生物相容性，其相对生长率（RGR）为107.19 %，细胞粘附率提高到43.85 %，表明其功能从生物惰性向生物活性转变。本研究为开发高性能、功能性的绿色莱赛尔纤维产品提供了一种新的改性途径。

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引用次数: 0

Effect of surface pretreatment on the surface performance of epoxy resin 表面预处理对环氧树脂表面性能的影响

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-01-12 DOI: 10.1016/j.colsurfa.2026.139562

Jiaxin Li , Manyan Yuan , Yifan Song , Jia Yang , Yuanjing Zhang , Yaru Wang , Rui Li , Huaijun Chen , Wenxia Zhao

In this study, a novel surface modification method utilizing a green and efficient MnO₂-H₂SO₄-H₃PO₄-H₂O system was employed to enhance the adhesion strength between the epoxy resin (EP) surface and the copper-plated layer. The effects of modification time and the volume ratios of sulfuric acid, phosphoric acid, and water on the hydrophilicity, surface morphology, and chemical properties of EP resin were investigated. Following post-modification, the surface hydrophilicity and roughness of EP have been effectively enhanced, providing a favorable surface condition for subsequent processing procedures. The surface of the EP resin was analyzed using Fourier transform-infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM) and energy dispersive spectroscopy (EDS). After the swelling and surface modification treatments, a group of –COOH formed on the EP substrate surface, which improved the surface hydrophilicity, and the surface contact angle decreased from 95.4° to 12.4°. At the same time, the average surface roughness (Ra) of EP resin was increased from 40.1 nm to 102 nm. The adhesion strength at the interface of the EP substrate and copper plating layer reached 0.72 kN/m, due to the combined effect of strong hydrophilicity and large surface roughness. The results showed that the modification process could improve the hydrophilicity, surface roughness, and adhesion strength of EP resins to some extent. Therefore, the MnO₂–H₂SO₄-H₃PO₄-H₂O system was a new, environmentally friendly surface modification system for EP substrates.

本研究采用绿色高效的MnO2-H2SO4-H3PO4-H2O体系进行表面改性，提高环氧树脂（EP）表面与镀铜层之间的粘附强度。研究了改性时间和硫酸、磷酸、水的体积比对EP树脂亲水性、表面形貌和化学性能的影响。改性后的EP表面亲水性和粗糙度得到有效提高，为后续加工提供了良好的表面条件。采用傅里叶变换红外光谱（FTIR）、x射线光电子能谱（XPS）、原子力显微镜（AFM）和能量色散光谱（EDS）对EP树脂表面进行了分析。经过膨胀和表面改性处理后，EP基板表面形成了一组-COOH，表面亲水性提高，表面接触角由95.4°降低到12.4°。同时，EP树脂的平均表面粗糙度（Ra）由40.1 nm提高到102 nm。由于亲水性强和表面粗糙度大的共同作用，EP基板与镀铜层界面的粘附强度达到0.72 kN/m。结果表明，该改性工艺能在一定程度上改善EP树脂的亲水性、表面粗糙度和粘接强度。因此，MnO2-H2SO4-H3PO4-H2O体系是一种新型的环保型EP基板表面改性体系。

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引用次数: 0

Interfacial electron transfer and surface engineering of chitosan–imide functionalized Fe3O4 nanocomposites for enhanced catalytic performance 壳聚糖-亚胺功能化Fe3O4纳米复合材料的界面电子转移和表面工程研究

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-01-12 DOI: 10.1016/j.colsurfa.2026.139551

Elavazhagan Gunasekaran, Sankar Govindarajan

This study reports the surface engineering of Fe₃O₄ nanoparticles using an imide-functionalized chitosan (CSNI) matrix to establish strong interfacial coupling and tunable catalytic reactivity. The Fe₃O₄–chitosan–imide nanocomposite (FeNp-CSNI) was synthesized via a sequential hydrothermal–imide functionalization route, yielding a worm-like mesoporous structure with superior colloidal stability. Structural and spectroscopic analyses (XRD, FTIR, BET, and TEM) confirmed the successful incorporation of imide groups that coordinated with surface Fe³ ⁺ sites, leading to enhanced dispersion and reduced crystallite size. Electrochemical and optical studies revealed a substantial decrease in charge-transfer resistance (0.26 Ω) and band-gap narrowing (1.4 eV), validating efficient electron migration across the Fe–O–C–N interface. The FeNp-CSNI exhibited remarkable peroxidase-like activity toward o-phenylenediamine oxidation and achieved > 95 % retention after five catalytic cycles. Radical scavenging and DFT results confirmed •OH as the dominant reactive species, generated through interfacial Fe³ ⁺/Fe²⁺ redox cycling. Additionally, the nanocomposite efficiently degraded crystal violet and rhodamine B under visible light, demonstrating its dual catalytic and photocatalytic capability. This work provides fundamental insight into how interfacial electron transfer and surface chemistry modulation govern the physicochemical stability and catalytic performance of bio-derived polymer–oxide nanocomposites.

本研究报道了利用亚胺功能化壳聚糖（CSNI）基质对Fe3O4纳米颗粒进行表面工程处理，以建立强界面偶联和可调的催化反应活性。采用顺序水热-亚胺功能化方法合成了fe3o4 -壳聚糖-亚胺纳米复合材料（FeNp-CSNI），得到了蠕虫状介孔结构，具有优异的胶体稳定性。结构和光谱分析（XRD、FTIR、BET和TEM）证实了与表面Fe³ +位点配合的亚胺基团的成功结合，从而增强了分散性，减小了晶体尺寸。电化学和光学研究表明，电荷转移电阻大幅降低（0.26 Ω），带隙缩小（1.4 eV），验证了Fe-O-C-N界面上电子的有效迁移。FeNp-CSNI对邻苯二胺的氧化表现出显著的过氧化物酶样活性，并在五次催化循环后达到了>； 95 %的保留率。自由基清除和DFT结果证实•OH是主要的活性物质，通过界面Fe³ + /Fe²+氧化还原循环生成。此外，纳米复合材料在可见光下可有效降解结晶紫和罗丹明B，显示出其双催化和光催化能力。这项工作为界面电子转移和表面化学调制如何控制生物衍生聚合物-氧化物纳米复合材料的物理化学稳定性和催化性能提供了基本的见解。

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引用次数: 0