Progress in Organic Coatings最新文献_第2页

Study on the corrosion resistance and antibacterial properties of magnesium alloy MAO polylactic acid coating in simulated body fluid 镁合金MAO聚乳酸涂层在模拟体液中的耐蚀性及抗菌性能研究

IF 7.3 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2026-01-28 DOI: 10.1016/j.porgcoat.2026.110002

Xinhe Wu , Quantong Jiang , Jingjing Wang , Zhenhua Chu , Yandao Chen , Jizhou Duan , Baorong Hou

Magnesium-based alloys are attractive candidates for biodegradable orthopedic implants owing to their excellent biocompatibility and bone-like mechanical properties; however, their excessively rapid corrosion in physiological environments often causes premature loss of mechanical integrity and adverse local reactions, limiting clinical translation. In this study, a micro-arc oxidation (MAO) ceramic layer and an outer polylactic acid (PLA) coating were constructed on a Magnesium alloy, and ZnTe particles were incorporated into the PLA layer at varying concentrations to obtain a ZnTe doped MAO/PLA composite coating with enhanced integrity and antibacterial function. The microstructure, coating morphology, and phase composition were characterized, and corrosion behavior in Hank's simulated body fluid was assessed by open-circuit potential and electrochemical impedance spectroscopy. Results show that the MAO layer forms a strongly adherent oxide barrier while the PLA topcoat effectively seals MAO micro-pores; ZnTe addition further improves coating compactness, leading to markedly increased potential stability and charge-transfer resistance relative to ZnTe-free coatings, indicating superior corrosion resistance. Immersion tests reveal that ZnTe incorporation enhances the buffering capacity of the system, mitigating the pH decrease associated with PLA hydrolysis. Antibacterial assays demonstrate a bactericidal rate exceeding 99% for ZnTe-containing coatings. Collectively, the ZnTe-doped MAO/PLA composite coating provides synergistic corrosion protection and robust antibacterial activity, offering a promising surface-engineering route to improve the long-term reliability of biodegradable magnesium implants.

镁基合金具有良好的生物相容性和骨样力学性能，是生物可降解骨科植入物的理想候选材料；然而，它们在生理环境中过快的腐蚀往往导致机械完整性过早丧失和局部不良反应，限制了临床转化。本研究在镁合金上构建微弧氧化（MAO）陶瓷层和外聚乳酸（PLA）涂层，并将不同浓度的ZnTe颗粒掺入PLA层中，得到具有增强完整性和抗菌功能的ZnTe掺杂MAO/PLA复合涂层。采用开路电势和电化学阻抗谱分析了合金的微观组织、镀层形貌和相组成，并对合金在Hank模拟体液中的腐蚀行为进行了表征。结果表明：聚乳酸面漆能有效封闭MAO微孔；ZnTe的加入进一步改善了涂层的致密性，与不含ZnTe的涂层相比，显著提高了电位稳定性和电荷转移阻力，表明涂层具有更强的耐腐蚀性。浸泡试验表明，ZnTe的掺入提高了体系的缓冲能力，减轻了PLA水解引起的pH下降。抗菌试验表明，含锌涂料的杀菌率超过99%。总的来说，znte掺杂MAO/PLA复合涂层具有协同防腐和强大的抗菌活性，为提高生物可降解镁植入物的长期可靠性提供了一条有前途的表面工程途径。

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引用次数: 0

Polydopamine activation of hydrophobic particles to enhance anti-corrosion and anti-fouling of epoxy coatings 聚多巴胺活化疏水颗粒增强环氧涂料的防腐蚀和防污性能

IF 7.3 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2026-01-27 DOI: 10.1016/j.porgcoat.2026.109998

Qiang Zhang , Wanwan Zhang , Yage Xia , Yanzheng Ji , Xinquan Yu , Youfa Zhang

Marine corrosion and biofouling are two significant factors that threaten the service reliability of ships and marine engineering equipment. Coating the surface of ship and marine engineering equipment with organic coatings is currently the most economical and effective solution to the problems of marine corrosion and biofouling. However, it is extremely difficult for a single organic coating material to simultaneously possess both anti-corrosion and anti-fouling properties. In this paper, modified PTFE@PDA particles were obtained by the self-polymerization of dopamine (DA) on the surface of polytetrafluoroethylene (PTFE) nanoparticles. The modified particles were mixed with epoxy resin and cured to prepare a low surface energy coating with both anti-corrosion and anti-fouling properties. The Q235B steel plate coated with PTFE@PDA coating achieved an impedance modulus (|Z|_0.01Hz) of 7.67 × 10⁹ Ω·cm² in the simulated seawater (3.5 wt% NaCl solution). After being cultured in the Escherichia coli culture medium for 72 h, the surface bacterial coverage of the glass sample coated with PTFE@PDA coating is only 2.25%. After being immersed and cultured in the Chlorella culture medium for 15 days, the coverage of Chlorella on the PTFE@PDA coating surface is only 2.8%. The PTFE@PDA coating is easy to prepare and simple to construct. It exhibits excellent mechanical properties, substrate adhesion, durability, self-cleaning properties, anti-corrosion, and anti-fouling properties, making it have good application potential in the field of ship and marine engineering.

海洋腐蚀和生物污染是威胁船舶和海洋工程设备使用可靠性的两个重要因素。在船舶和海洋工程设备表面涂覆有机涂层是目前解决海洋腐蚀和生物污染问题最经济有效的方法。然而，单一的有机涂层材料同时具有防腐和防污性能是非常困难的。本文通过多巴胺（DA）在聚四氟乙烯（PTFE）纳米颗粒表面的自聚合得到了改性PTFE@PDA颗粒。将改性后的颗粒与环氧树脂混合固化，制备出具有防腐蚀和防污性能的低表面能涂层。涂有PTFE@PDA涂层的Q235B钢板在模拟海水（3.5 wt% NaCl溶液）中的阻抗模量（|Z|0.01Hz）为7.67 × 109 Ω·cm2。在大肠杆菌培养基中培养72 h后，涂有PTFE@PDA涂层的玻璃样品表面细菌覆盖率仅为2.25%。在小球藻培养基中浸泡培养15天后，PTFE@PDA包衣表面小球藻的覆盖率仅为2.8%。PTFE@PDA涂料制备简单，施工简单。它具有优异的机械性能、基材附着力、耐久性、自洁性能、防腐性能和防污性能，在船舶和海洋工程领域具有良好的应用潜力。

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引用次数: 0

Stress-transforming polymer with synergistic energy dissipation for durable anti-corrosion coatings 具有协同能量耗散的应力转化聚合物用于耐用防腐涂层

IF 7.3 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2026-01-27 DOI: 10.1016/j.porgcoat.2026.110000

Li Chen , Fan-di Meng , Fu-hui Wang , Li Liu

Polymers used in protective coatings often suffer stress-induced degradation under dynamic loading, especially in deep-sea environments dominated by high hydrostatic pressure and fluid shear. Here, we report a stress-transforming polymer that actively converts mechanical energy into network adaptation rather than passively withstanding it. This material combines a robust epoxy backbone with a dynamic network of side-chain-anchored diselenide mechanophores and a complementary hydrogen-bonding network. The diselenide motifs, grafted via hexamethylene diisocyanate, act as force-activated sacrificial linkages that undergo homolytic scission and radical exchange under stress, enabling topological remodeling of the network. Spectroscopic analyses (FT-IR, ¹H NMR, XPS) confirmed the successful synthesis. Upon mechanical activation (3 MPa pre-compression, 5 min), the polymer exhibits remarkable autonomous self-strengthening, with tensile strength and toughness increased by approximately 308% and 194%, respectively. Cyclic tensile and DMA analyses revealed stress-induced reinforcement and pronounced energy dissipation. Electron paramagnetic resonance spectroscopy directly detected selenium-centered radicals post-compression, while in situ FT-IR captured reversible bonding events, providing combined evidence for the force-triggered SeSe recombination and sacrificial hydrogen bonding. In simulated deep-sea conditions (6 MPa + 3 m/s, 3.5 wt% NaCl), the optimal coating formulation (STP₅–EP) demonstrated superior anti-corrosion performance, maintaining exceptional barrier integrity with high charge-transfer resistance (2.3 × 10¹⁰ Ω·cm²) and a crack-free morphology after 240 h. This work establishes a viable molecular engineering paradigm for developing coatings that actively resist mechanical degradation through intrinsic stress transformation, offering a pathway to enhanced durability in extreme environments.

用于保护涂层的聚合物在动态载荷下往往会发生应力引起的降解，特别是在高静水压力和流体剪切主导的深海环境中。在这里，我们报道了一种应力转化聚合物，它主动地将机械能转化为网络适应，而不是被动地承受它。这种材料结合了坚固的环氧树脂骨架、侧链锚定的二硒化机械基团的动态网络和互补的氢键网络。二烯基序通过六亚甲基二异氰酸酯接枝，作为力激活的牺牲键，在压力下进行均溶断裂和自由基交换，从而实现网络的拓扑重塑。光谱分析（FT-IR, 1H NMR， XPS）证实了合成的成功。经机械活化（预压缩3 MPa， 5 min）后，聚合物表现出显著的自增强特性，拉伸强度和韧性分别提高了约308%和194%。循环拉伸和DMA分析显示应力诱导的钢筋和明显的能量耗散。电子顺磁共振光谱直接检测压缩后的硒中心自由基，而原位FT-IR捕获可逆键事件，为力触发的SeSe重组和牺牲氢键提供了综合证据。在模拟深海条件下（6 MPa + 3 m/s, 3.5 wt% NaCl），最佳涂层配方（STP5-EP）表现出卓越的抗腐蚀性能，在240 h后保持优异的屏障完整性，具有高电荷转移阻力（2.3 × 1010 Ω·cm2）和无裂纹形貌。该工作为开发通过内在应力转变积极抵抗机械降解的涂层建立了可行的分子工程范式。提供了在极端环境下增强耐用性的途径。

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引用次数: 0

Multifunctional fluorophore based on fluorene–bithiophene architecture for latent print visualization and stimuli-responsive eco-friendly security inks 基于芴-噻吩结构的多功能荧光团，用于潜在打印可视化和刺激响应型环保安全油墨

IF 7.3 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2026-01-27 DOI: 10.1016/j.porgcoat.2026.109995

Rakshitha K. Jain , Anand P.J. , Dhanya Sunil , Poornima Bhagavath , Anoop Kishore Vatti , Aseefhali Bankapur , Shyambhargav Jodidar Srinivasamurthy , Navas Shereef Ellyan

Latent finger and lip prints are vital forensic evidence due to their uniqueness and permanence, yet visualization on varied surfaces is challenging. Meanwhile, rising counterfeit threats demand advanced, multi-level security materials to protect consumers, brands, and economies. The present study addresses these dual requirements through the design and synthesis of a new multi-functional fluorophore BTAF with conjugated fluorene–bithiophene structural framework intended for latent finger mark and lip print visualization and as a pigment in security ink applications. This π-extended molecule combines the rigidity and photostability of fluorene with the electron-rich nature of bithiophene, resulting in red-shifted solid-state fluorescence with high quantum yield. The fluorophore demonstrated excellent performance in visualizing latent finger/lip prints across different substrate types. The optical and microscopic images enabled both qualitative and quantitative analysis of intricate details of these prints. The interaction of BTAF with glycine and myristic acid present in the latent prints was explored through computational and molecular dynamics simulations and validated by FTIR spectral analysis. Furthermore, BTAF was incorporated into a composite eco-friendly ink that exhibits excellent flow for continuous printing, strong substrate adhesion, and high printability compatible with offset printing systems, enabling application in multilevel anti-counterfeiting. The print exhibits a reversible, dual-mode response, transitioning from magenta to yellow under daylight when heated above 31 °C, while consistently displaying green fluorescence under 380 nm UV light. The facile synthesis, low toxicity, and dual functionality with stable performance make BTAF a promising material for integration into smart forensic tools and advanced security printing technologies.

由于其独特性和持久性，潜在的手指和唇印是重要的法医证据，但在各种表面上可视化是具有挑战性的。与此同时，不断上升的假冒威胁需要先进的、多层次的安全材料来保护消费者、品牌和经济。本研究通过设计和合成一种具有共轭芴-噻吩结构框架的新型多功能荧光团BTAF来解决这些双重要求，该结构框架旨在用于潜在的指印和唇印的可视化，并作为安全油墨中的颜料。这种π扩展分子结合了芴的刚性和光稳定性和二噻吩的富电子性质，产生了高量子产率的红移固态荧光。荧光团在显示不同基底类型的潜在手指/唇印方面表现出优异的性能。光学和显微图像可以对这些指纹的复杂细节进行定性和定量分析。通过计算和分子动力学模拟探讨了BTAF与潜在指纹中存在的甘氨酸和肉豆酱酸的相互作用，并通过FTIR光谱分析进行了验证。此外，BTAF被加入到复合环保油墨中，具有良好的连续印刷流动性，强大的基材附着力，以及与胶印系统兼容的高印刷适性，可用于多级防伪。该打印材料具有可逆的双模响应，当加热到31°C以上时，在日光下从品红转变为黄色，而在380 nm紫外光下始终显示绿色荧光。易合成、低毒性、性能稳定的双重功能使BTAF成为集成到智能法医工具和先进安全打印技术中的有前途的材料。

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引用次数: 0

Epoxy coatings reinforced with LDH–COF nanocarriers: A dual-function strategy for barrier and active protection 用LDH-COF纳米载体增强环氧涂料：一种双重功能的屏障和主动保护策略

IF 7.3 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2026-01-27 DOI: 10.1016/j.porgcoat.2026.109958

Laleh Kaghazchi , Reza Naderi , Bahram Ramezanzadeh

Due to the drawbacks of LDH, including limited interlayer spaces, restricted choice of corrosion inhibitors, and difficulty in dispersion in epoxy, this study selected COF with a porous structure for hybridization and fabrication of a nanocarrier with a higher loading capacity and controlled release. After the synthesis of LDH-COF (LC), the sodium glutamate-zinc was selected as the inhibitor, and the loading process was carried out. Following the characterization tests (FESEM, XRD, BET, and XPS) to demonstrate the successful synthesis, corrosion studies were carried out in two sections: saline solution and epoxy coating. The LDH sheets decorated with spherical particles of COF showed a specific surface area of twice that of LDH (112 m²/g). The presence of LC/sodium glutamate-zinc (SG-Zn) in the 3.5 wt% NaCl solution led to an inhibition efficiency of 96%. The charge transfer resistance after 5 h of immersion (147,500 Ω.cm²) and the rate of 7 after 1000 h of salt spray test revealed the desirable active protection performance of LC-SZ/EP. While the intact EP coating exhibited a noticeable decline in impedance after 70 days of exposure, the LC-SZ/EP coating maintained a stable impedance of approximately 10¹¹ Ω·cm². In addition to creating a coating system with improved barrier properties and providing active protection, dry and wet adhesion were increased by 23% and 44%, respectively, and the cathodic delamination radius was reduced by 55%.

由于LDH存在层间空间有限、缓蚀剂选择受限、难以在环氧树脂中分散等缺点，本研究选择具有多孔结构的COF进行杂化，制备了具有更高负载能力和可控释放的纳米载体。在合成LDH-COF （LC）后，选择谷氨酸锌钠作为抑制剂，进行负载过程。在进行表征测试（FESEM、XRD、BET和XPS）以证明合成成功后，在盐水溶液和环氧涂层两种环境中进行了腐蚀研究。用COF球形颗粒修饰的LDH片的比表面积（112 m2/g）是LDH片的两倍。LC/谷氨酸钠锌（SG-Zn）在3.5 wt% NaCl溶液中的抑制率为96%。LC-SZ/EP浸泡5 h后的电荷转移电阻（147,500 Ω.cm2）和盐雾1000 h后的电荷转移率为7，显示出了良好的主动保护性能。而完整EP涂层在暴露70天后阻抗明显下降，LC-SZ/EP涂层的阻抗保持稳定，约为1011 Ω·cm2。除了创建具有改进阻隔性能和提供主动保护的涂层系统外，干式和湿式附着力分别增加了23%和44%，阴极分层半径减少了55%。

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引用次数: 0

Improvement of epoxy coating chemical stability via fluorinated phenyl isocyanate modification: substituent-dependent enhancement in anti-corrosion and anti-aging properties 氟化苯基异氰酸酯改性提高环氧涂料化学稳定性：抗腐蚀和抗老化性能的取代基依赖性增强

IF 7.3 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2026-01-26 DOI: 10.1016/j.porgcoat.2026.109997

Yijian Gao , Keyu Chen , Bingjie Zhou , Chonggang Wu , Zhenyu Chen , Hongyu Cen

Epoxy resin coatings (EP) have maintained a dominant position in the field of corrosion protection, but they also suffer from poor weatherability and high brittleness due to internal stresses arising from rigid molecular chain curing, inherent defects, and chemical oxidation caused by the penetration of corrosive media. These deficiencies lead to aging failure and degradation of protective performance. In this study, a covalent chain-segment redesign strategy is proposed by grafting three fluorinated phenyl isocyanates—4-fluorophenyl isocyanate (4FI), 4-trifluoromethoxyphenyl isocyanate (4TOPI) and 4-trifluoromethylphenyl isocyanate (4TPI) onto the hydroxyl groups (–OH) of EP to enhance backbone chemical stability and to elucidate substituent-dependent reinforcement in anticorrosion and anti-aging performance. The research revealed that all three small-molecule graft-modified coatings (EP-4FI, EP-4TOPI, EP-4TPI) exhibit superior anti-aging performance compared to blank EP coating under various aging conditions, including salt spray, UV irradiation, and chemical immersion. The overall performance ranking is EP-4TPI > EP-4TOPI > EP-4FI, and the impedance modulus of EP-4TPI coated on Q235 carbon steel substrate increased 1–5 orders of magnitude compared to blank EP and remained constant at 10¹⁰ Ω·cm² after undergoing all aging tests. Owing to fluorine incorporation and the concomitant reduction of hydrophilic –OH sites, the modified coatings maintain a hydrophobic surface even after aging, thereby effectively suppressing electrolyte permeation. In particular, the CF₃-substituted 4TPI structure provides enhanced resistance to UV-induced photo-oxidation and chemical corrosion. Quantum chemical calculations further suggest that fluorine-containing segments preferentially interact with corrosive species, delaying their transport toward the metal/coating interface. This work demonstrates an efficient small-molecule grafting approach to simultaneously improve corrosion protection and weathering resistance of epoxy coatings on carbon steel and provides guidance for fluorinated motif selection.

环氧树脂涂料（EP）在防腐领域一直保持着主导地位，但由于刚性分子链固化产生的内应力、固有缺陷以及腐蚀介质渗透引起的化学氧化等原因，环氧树脂涂料耐候性差，脆性高。这些缺陷导致老化失效和防护性能下降。本研究提出了一种共价链段重新设计策略，通过将3个氟化苯基异氰酸酯- 4-氟苯基异氰酸酯（4FI）、4-三氟甲基苯基异氰酸酯（4TOPI）和4-三氟甲基苯基异氰酸酯（4TPI）接枝到EP的羟基（-OH）上，以提高主链的化学稳定性，并阐明取代基依赖性增强对防腐和抗老化性能的影响。研究表明，与空白EP涂层相比，三种小分子接枝改性涂层（EP- 4fi、EP- 4topi、EP- 4tpi）在盐雾、紫外线照射和化学浸泡等各种老化条件下均表现出优异的抗老化性能。综合性能排名为EP- 4tpi >； EP- 4topi > EP- 4fi，在Q235碳钢基体上涂层EP- 4tpi的阻抗模量比空白EP提高了1-5个数量级，经过所有老化试验后保持在1010 Ω·cm2不变。由于氟的掺入和亲水性-OH位点的减少，改性后的涂层即使在老化后仍保持疏水表面，从而有效地抑制了电解质的渗透。特别是，cf3取代的4TPI结构提供了增强的抗紫外线诱导的光氧化和化学腐蚀的能力。量子化学计算进一步表明，含氟段优先与腐蚀性物质相互作用，延迟它们向金属/涂层界面的传输。本研究展示了一种有效的小分子接枝方法，可以同时提高碳钢环氧涂层的防腐性能和耐候性，并为氟化基序的选择提供指导。

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引用次数: 0

On-demand underwater adhesion and self-healing superhydrophilic/underwater superoleophobic coating 按需水下粘附和自修复超亲水/水下超疏油涂层

IF 7.3 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2026-01-24 DOI: 10.1016/j.porgcoat.2026.109978

Funing Zhang , Jihua Yu , Jiwu Zhao , Jingxue Xu , Weina Kong , Mingjian Luo , Huaiyuan Wang , Fatang Liu

On-demand adhesion superhydrophilic/underwater superoleophobic coatings can significantly simplify the functionalization and regeneration processes of equipment surfaces, while also offering significant economic benefits and environmental sustainability advantages. However, preparing superhydrophilic/underwater superoleophobic coatings that can simultaneously satisfy high adhesion and on-demand adhesion remains a critical challenge. In this study, an on-demand adhesion, self-healing superhydrophilic/underwater superoleophobic coating (EDPE) based on nonwoven fabric was designed and fabricated by integrating the temperature-responsive mechanism of tardigrades with the superhydrophilic properties of fish mucus through a multi-level biomimetic structure. The produced EDPE coating retained its structural integrity and underwater superoleophobicity after 160 friction cycles and immersion in complex water environments (pH=2, pH=12, and artificial seawater), achieving self-healing and the restoration of underwater superoleophobicity in complex water environments. The coating also exhibited excellent adhesion properties on various materials, as well as repeatable adhesion and retention of its underwater superoleophobic performance through temperature response, offering outstanding resistance to external forces and environmental changes. In addition, the coating demonstrated excellent antifouling, drag reduction, and antibacterial properties. Notably, this work proposed a simple and effective design strategy for on-demand adhesion and self-healing superhydrophilic coatings. The approach could enable scalable manufacturing processes, offering new insights for industrial applications requiring advanced surface engineering solutions.

随需附着力的超亲水/水下超疏油涂层可以显著简化设备表面的功能化和再生过程，同时也具有显著的经济效益和环境可持续性优势。然而，制备同时满足高附着力和按需附着力的超亲水/水下超疏油涂层仍然是一个关键的挑战。本研究将水熊虫的温度响应机制与鱼黏液的超亲水特性结合起来，通过多层次的仿生结构，设计并制备了一种基于无纺布的随需粘附、自修复的超亲水/水下超疏油涂层（EDPE）。制备的EDPE涂层在复杂水环境（pH=2、pH=12和人工海水）中经过160次摩擦循环和浸泡后，仍保持了结构的完整性和水下超疏油性，在复杂水环境中实现了自修复和水下超疏油性的恢复。该涂层在各种材料上也表现出优异的粘附性能，并通过温度响应可重复粘附并保持其水下超疏油性能，具有出色的抵抗外力和环境变化的能力。此外，该涂层还具有优异的防污、减阻和抗菌性能。值得注意的是，这项工作提出了一种简单有效的按需粘附和自修复超亲水涂层设计策略。该方法可以实现可扩展的制造工艺，为需要先进表面工程解决方案的工业应用提供新的见解。

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引用次数: 0

Fluorine-free superhydrophobic multi-functional robust coating 无氟超疏水多功能坚固涂层

IF 7.3 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2026-01-24 DOI: 10.1016/j.porgcoat.2026.109976

Hao Zhang , Tong Liu , Duo Qi , Ming Wu , Fuxin Liang , Dawei Zhang , Na Wang

Although multifunctional superhydrophobic surfaces exhibit broad application prospects, their practical application is constrained by complicated preparation, environmental pollution, demanding equipment requirements, and poor durability. Herein, we developed a fluorine-free, ultrarobust superhydrophobic coating comprising zeolitic imidazolate framework-71 (ZIF-71)-assembled CaCO₃ microspheres and an epoxy/polydimethylsiloxane dual-network resin. This coating could be applied to various substrates, exhibiting a water contact angle of 154.5° ± 0.8° and water sliding angle of 5.4° ± 0.5°. It retained its superhydrophobic properties after severe mechanical stresses, such as those from tape peeling (300 cycles), sandpaper abrasion (12 m), high-velocity water jetting (42 L), and quartz sand impact (4.0 kg). This exceptional durability was attributed to the stable hierarchical microscale/nanoscale structure formed by ZIF-71 nanoparticles on the surface of CaCO₃ microspheres and enhanced interfacial adhesion due to the interconnected pore structure of the microspheres. Additionally, the coating exhibited strong resistance to harsh corrosive environments (pH 1–14, 3.5 wt% NaCl, and saturated NaCl solutions) as well as self-cleaning properties, which effectively prevented dirt accumulation. Electrochemical impedance spectroscopy in a 3.5 wt% NaCl solution confirmed the superior durability of the composite coating, showing an impedance modulus of 1.02 × 10¹⁰ Ω·cm². Icing delay and cyclic freeze–thaw tests confirmed that the coating could considerably delay ice nucleation by up to 458 s and maintain hydrophobicity after 25 freeze–thaw cycles.

虽然多功能超疏水表面具有广阔的应用前景，但其实际应用受到制备复杂、环境污染、设备要求高、耐久性差等因素的制约。在此，我们开发了一种无氟，超耐水性超疏水涂层，该涂层由沸石咪唑酸框架-71 （ZIF-71）组装的CaCO3微球和环氧/聚二甲基硅氧烷双网络树脂组成。该涂层可应用于多种基材，水接触角为154.5°±0.8°，水滑动角为5.4°±0.5°。在胶带剥离（300次循环）、砂纸磨损（12米）、高速水射流（42升）和石英砂冲击（4.0公斤）等剧烈机械应力作用下，它仍能保持超疏水性。这种优异的耐久性归因于ZIF-71纳米颗粒在CaCO3微球表面形成的稳定的微/纳米级分层结构，以及由于微球的互连孔结构而增强的界面附着力。此外，该涂层具有很强的耐恶劣腐蚀环境（pH 1-14, 3.5 wt% NaCl和饱和NaCl溶液）和自清洁性能，有效地防止了污垢的积累。在3.5 wt% NaCl溶液中，电化学阻抗谱证实了复合涂层优异的耐久性，阻抗模量为1.02 × 1010 Ω·cm2。结冰延迟和循环冻融试验证实，该涂层可以显著延迟冰核长达458秒，并在25次冻融循环后保持疏水性。

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引用次数: 0

Mechanisms of atomic oxygen resistance in POSS-enhanced fluorinated polyimide and high-frequency insulation stability based on PLS analysis 基于PLS分析的poss增强氟化聚酰亚胺耐原子氧机理及高频绝缘稳定性

IF 7.3 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2026-01-23 DOI: 10.1016/j.porgcoat.2026.109990

Shengrui Zhou , Li Zhang , Guan Wang , Bilal Iqbal Ayubi , Rakhmonov Ikromjon Usmonovich , Junpeng Ji

Fluorinated polyimide (FPI) is widely used in high-frequency electronics and aerospace insulation applications owing to its low dielectric loss and excellent stability; however, the degradation behavior and regulatory mechanisms of its high-frequency insulation performance after atomic oxygen (AO) erosion remain unclear. In this study, FPI/POSS composite films with different contents of polyhedral oligomeric silsesquioxane (POSS) were prepared. An AO ground-simulated erosion system was employed to evaluate the protective effectiveness of POSS on FPI and its underlying mechanisms. Combined with vacuum high-frequency partial discharge testing and a partial least squares (PLS) regression model, the effects of AO erosion and material structural regulation on the evolution of insulation lifetime were systematically investigated. The results show that pure FPI exhibits pronounced surface roughening and oxidative erosion after AO bombardment, whereas the introduction of POSS induces the in-situ formation of a dense SiO₂ passivation layer, effectively suppressing further polymer etching. Meanwhile, the FPI/POSS system demonstrates a higher discharge inception voltage, lower dielectric loss, and a longer insulation lifetime. This work provides a new perspective for evaluating insulation reliability and optimizing the structural design of polyimide materials for space service environments.

氟化聚酰亚胺（FPI）因其低介电损耗和优异的稳定性而广泛用于高频电子和航空航天绝缘应用；然而，其高频绝缘性能在原子氧（AO）侵蚀后的降解行为及其调控机制尚不清楚。本研究制备了不同含量的多面体低聚硅氧烷（POSS）的FPI/POSS复合薄膜。采用AO地面模拟侵蚀系统评价了POSS对FPI的防护效果及其机制。结合真空高频局部放电试验和偏最小二乘回归模型，系统研究了AO侵蚀和材料结构调节对绝缘寿命演变的影响。结果表明，纯FPI在AO轰击后表现出明显的表面粗化和氧化侵蚀，而POSS的引入导致原位形成致密的SiO2钝化层，有效地抑制了聚合物的进一步蚀刻。同时，FPI/POSS系统具有较高的放电起始电压、较低的介电损耗和较长的绝缘寿命。该研究为空间服役环境下聚酰亚胺材料的绝缘可靠性评价和结构设计优化提供了新的视角。

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引用次数: 0

Structure-directed and filler-assisted strategy for high thermal conductivity, low dielectric porous triazole-imide films 高导热、低介电介质多孔三唑-亚胺薄膜的结构导向和填料辅助策略

IF 7.3 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2026-01-23 DOI: 10.1016/j.porgcoat.2026.109993

Xueying Wu , Baoyue Zhang , Peipei Xu , Baijie Cheng , Ruixue Wang , Shanyi Guang , Hongyao Xu

The performance of traditional packaging materials can no longer meet the requirements of the advanced semiconductor industry for high thermal conductivity and improved signal transmission rate. Therefore, the development of new polymer materials with both high thermal conductivity and low dielectric constant has become a huge challenge. A dual-regulation strategy was demonstrated, using ionic liquid as a “structure-directing agent” and magnesium oxide (MgO) as a thermal conductive filler. Through the strong interaction between the ionic liquid and the polymer main chain, further enhanced by MgO induced chain segment orientation and close packing. It integrates a porous membrane with excellent comprehensive performance, featuring a high thermal conductivity of 7.09 W∙m⁻¹∙K⁻¹ and a low dielectric constant of 1.45. Additionally, it boasts good thermal stability with a glass transition temperature (Tg) as high as 265 °C and excellent mechanical properties, with a tensile strength of up to 179.8 MPa. This dual regulation strategy is expected to be extended to other high performance polymer systems to achieve synergistic optimization of multiple properties, not just thermal and dielectric. This porous membrane demonstrates enormous potential as the next generation solution for electronic packaging, thermal management, and energy device applications.

传统封装材料的性能已经不能满足先进半导体工业对高导热性和提高信号传输速率的要求。因此，开发既具有高导热性又具有低介电常数的新型高分子材料已成为一项巨大的挑战。采用离子液体作为“结构导向剂”，氧化镁（MgO）作为导热填料，证明了一种双重调节策略。离子液体通过与聚合物主链的强相互作用，进一步增强了MgO诱导的链段取向和紧密堆积。它集成了一种综合性能优异的多孔膜，具有7.09 W∙m−1∙K−1的高导热系数和1.45的低介电常数。此外，它具有良好的热稳定性，玻璃化转变温度（Tg）高达265℃，机械性能优异，抗拉强度高达179.8 MPa。这种双重调节策略有望扩展到其他高性能聚合物体系，以实现多种性能的协同优化，而不仅仅是热学和介电性能。这种多孔膜作为下一代电子封装、热管理和能源设备应用的解决方案显示出巨大的潜力。

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引用次数: 0