Progress in Organic Coatings最新文献

{"title":"Synergistic active-passive corrosion protection of steel by a pH-responsive CeO2@ZrP epoxy coating enabled by interfacial engineering","authors":"Yiqian Lv ,&nbsp;Bo Wang ,&nbsp;Jingmao Zhao ,&nbsp;Haiqing Liu ,&nbsp;Ziji Li ,&nbsp;Fangze Zi ,&nbsp;Yuhao Guo","doi":"10.1016/j.porgcoat.2025.109637","DOIUrl":"10.1016/j.porgcoat.2025.109637","url":null,"abstract":"<div><div>To overcome the critical limitation of conventional epoxy coatings in providing long-term barrier effect against corrosion species and on-demand corrosion inhibition at damaged sites, this study develops a self-protective CeO₂@ZrP/EP composites coating via in-situ hydrothermal growth of pH-responsive CeO₂ nanoparticles on lamellar α-ZrP nanosheets. The hydroxyl-rich CeO₂ nanoparticles not only enhance interfacial compatibility by filling voids and creating mechanical interlocking between α-ZrP nanosheets and the epoxy matrix, but also enable pH-triggered Ce^3+/4+ release under acidic condition. After 60 days immersion, the composite coating achieved a low-frequency impedance modulus (|Z|_0.01Hz) of 3.5 × 10⁹ Ω·cm², which is four orders of magnitude higher than pure EP coating (3.7 × 10⁵ Ω·cm²). Crucially, elemental mapping confirmed 2.0 wt% cerium enrichment at artificial scratches, demonstrating autonomous active inhibition. This dual-action strategy synergistically integrates durable barrier protection with intelligent corrosion inhibition, providing long-term steel protection in marine environments.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"210 ","pages":"Article 109637"},"PeriodicalIF":7.3,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PDA-rGO modified epoxy/hydrogel microsphere composite coatings for fast ablation and surface temperature control via triple locking water strategy","authors":"Zibo Xu,&nbsp;Tianwen Dai,&nbsp;Xiang Wang,&nbsp;Yang Chen,&nbsp;Pengbo Liu,&nbsp;Huawei Zou","doi":"10.1016/j.porgcoat.2025.109636","DOIUrl":"10.1016/j.porgcoat.2025.109636","url":null,"abstract":"<div><div>Owing to its superior mechanical and process performance, epoxy is widely used as coating material. However, its high surface temperature during ablation limits its potential for infrared stealth application. This study aims to achieve rapid ablation and effective surface temperature regulation under high-temperature conditions. Here, we introduced polydopamine (PDA)-modified graphene oxide (PDA-rGO) and GO coated hydrogel microspheres (GO@HMPs) into epoxy (TETGE) matrix to prepare TETGE/PDA-rGO/GO@HMPs (TPG/GO@HMPs) composites, which were proved to have excellent anti-dehydration performance, fast ablation ability and surface temperature regulation. The anti-dehydration performances of the composites were enhanced through triple locking water strategy. For the TPG/GO@HMPs (30/70) system, after an 80-hour dehydration test, the water loss rate decreased to 25.6 %, and further to 10.3 % with 6 M LiCl doping. Subsequent oxygen-acetylene ablation tests demonstrated that the introduction of GO@HMPs significantly accelerated the ablation process of the material: compared to the TPG system, the mass ablation rate of the TPG/GO@HMPs (30/70) system increased from 0.08 g/s to 0.14 g/s, and the linear ablation rate improved from 0.17 mm/s to 0.25 mm/s. Moreover, for the TPG/GO@HMPs (30/70) system, its final surface temperature after 30 s ablation decreased from 1068 °C to 564 °C, and the infrared radiant energy was reduced to 3 × 10⁴ W/m², which was about 80 % lower than that of pure epoxy resin. These results indicated that the TETGE/PDA-rGO/GO@HMPs composites would have promising applications in the fields of surface temperature control and infrared stealth of high-speed aircrafts.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"210 ","pages":"Article 109636"},"PeriodicalIF":7.3,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced flame retardancy and thermal stability of PLA via DOPO-based polyamide and phytic acid/PEI-modified CaAl LDH: A synergistic approach through bulk and coating strategies","authors":"Mohsen Hajibeygi,&nbsp;Mahdi Heydari","doi":"10.1016/j.porgcoat.2025.109650","DOIUrl":"10.1016/j.porgcoat.2025.109650","url":null,"abstract":"<div><div>A flame-retardant system combining a DOPO-containing polyamide (DPA) and a phytic acid/polyethylene imine-modified Ca<img>Al layered double hydroxide (MLDH) was developed to enhance the flame retardancy, thermal stability, and mechanical properties of polylactic acid (PLA). Two modification strategies were employed: direct coating of PLA films with DPA and DPA/MLDH nanocomposites, and incorporation of MLDH into PLA followed by DPA coating. Both modifications were carried out using a dip-coating method in concentrated solutions. Uniform dispersion of MLDH and effective coating formation were confirmed by fourier-transform infrared (FTIR), X-ray diffraction (XRD) patterns, and field-emission scanning electron microscopy (FE-SEM) analyses, which contributed to improved interfacial interactions within the nanocomposite structure. Thermogravimetric analysis (TGA) revealed that the synergistic effect of MLDH incorporation and DPA coating significantly increased the T₁₀ values and char residue, indicating enhanced thermal stability and char-forming ability that inhibit flame propagation. Furthermore, the peak heat release rate (pHRR) of the PLA sample including 5 wt% of MLDH coated with DPA (PLN5-DC) decreased 35 %, compared to neat PLA, reflecting improved flame retardancy. The oxygen barrier effect and char reinforcement provided by the MLDH/DPA system raised the limiting oxygen index (LOI) and enabled a UL94 V-0 classification. Mechanical testing showed that the presence of MLDH notably reinforced the PLA matrix, resulting in a substantial increase in tensile strength (up to 77.2 MPa).</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"210 ","pages":"Article 109650"},"PeriodicalIF":7.3,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Smart self-healing coatings based on halloysite nanotube/reduced graphene oxide loaded with corrosion inhibitors","authors":"Shougang Chen ,&nbsp;Tengxun Yang ,&nbsp;Jiaxin Huang ,&nbsp;Liang Ning ,&nbsp;Huimeng Feng ,&nbsp;Meiyan Yu ,&nbsp;Xianming Wang","doi":"10.1016/j.porgcoat.2025.109614","DOIUrl":"10.1016/j.porgcoat.2025.109614","url":null,"abstract":"<div><div>In the harsh marine environment, epoxy resin is prone to interface mismatch with nano-fillers, leading to rapid failure of anti-corrosion coatings. The excellent thermal stability and bonding ability of hollow nanotubes in halloysite nanotube can enhance the corrosion resistance of the coating. In this paper, graphene oxide (GO) was reduced to reduced graphene oxide (rGO) by reduction-coagulation method and combined with halloysite nanotube (HNT) to become HNT/rGO, then the novel nanofiller HNT-CS/rGO was synthesized by loading the corrosion inhibitor benzotriazole (BTA) in HNT and coating chitosan (CS). The introduction of 2D rGO material not only effectively strengthened the passive barrier ability of the coating, but also improved the interfacial compatibility between the filler and the epoxy resin. In the test of the fracture toughness of the coating, the fracture toughness of the composite coating with HNT/rGO filler reached 1368.78 J/m², which was significantly increased compared with the 586.14 J/m² of the pure epoxy resin coating. The low-frequency impedance mode value of the composite coating with 2 wt% HNT-CS/rGO added exceeded 10¹⁰ Ω.cm² for the first 28 days, providing very excellent corrosion protection. Meanwhile, confocal laser scanning microscope showed that the composite coating with 2 wt% HNT-CS/rGO was significantly better than the pure epoxy coating in terms of corrosion at the scratch, which proved that it had a good self-healing performance. The above shows that HNT-CS/rGO modified epoxy coating has both excellent passive barrier and active repair performance, which can effectively resist the harsh marine environment and realize long-term corrosion protection.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"209 ","pages":"Article 109614"},"PeriodicalIF":7.3,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144925704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"One-piece insulating superhydrophobic photothermal coating for suppression of icing and thermal aging of wind turbine blades","authors":"Yu Zhang,&nbsp;Fang Yao,&nbsp;Hao Tu,&nbsp;Shilin Peng,&nbsp;Min Huang,&nbsp;Mingtai Liu,&nbsp;Jie Mei,&nbsp;Jian Wang","doi":"10.1016/j.porgcoat.2025.109630","DOIUrl":"10.1016/j.porgcoat.2025.109630","url":null,"abstract":"<div><div>Existing anti-/de-icing coatings often face the problems of insufficient mechanical strength and accelerated aging of the wind turbine blades due to the high temperature in the summer. In this study, an exceptional thermally insulating photothermal superhydrophobic anti-/de-icing coating, designated HGMs@Ni/PDMS (HNP), was fabricated by electroless nickel plating on hollow glass microspheres (HGMs) followed by integration with polydimethylsiloxane (PDMS). The intense chemical reactions during the nickel electroplating process and the scattering effect of nickel metal nanoparticles on light cause the HGMs to change from white to black. Combined with the localized surface plasmon resonance (LSPR) effect, the coating exhibits excellent photothermal performance, and the surface temperature of the coating could be increased from 20 °C to 66 °C in 100 s under a light intensity of 1000 W·m⁻². The hollow structure of HGMs and the low thermal conductivity of PDMS synergistically give the coating excellent thermal insulation performance, which slows down the thermal aging of the turbine blades while effectively slowing down the release of latent heat during the freezing of the droplets, resulting in the freezing time of HNP-3 at −10 °C being close to 40 min. In addition, the one-piece structure has no interlayer bonding problem, and the nanometer-sized nickel particles grown on the HGMs surface can effectively increase the bonding points with PDMS, resulting in excellent mechanical properties of the coating, together with its simple preparation method, which is suitable for large-area preparation.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"209 ","pages":"Article 109630"},"PeriodicalIF":7.3,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144925705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bio-based self-stratifying waterborne coatings via silicone-induced phase separation for enhanced hardness and anti-graffiti performance","authors":"Yuchen Zhang ,&nbsp;Gonghao Wang ,&nbsp;Die Yang ,&nbsp;Yongbo Ding ,&nbsp;Yinxiu Zuo ,&nbsp;Liang Shen","doi":"10.1016/j.porgcoat.2025.109622","DOIUrl":"10.1016/j.porgcoat.2025.109622","url":null,"abstract":"<div><div>This study developed a green and bio-based waterborne coating system that self-stratifies via silicone-induced phase separation. The system is built on a rosin acid-modified epoxy ester/acrylate hybrid resin and includes a small amount of vinyl-terminated silicone oil to promote phase separation. Two resin formulations were prepared, namely a silicone oil-free epoxy ester/acrylate hybrid resin (designated as EAR20, rosin acid constitutes 20 % of the total carboxylic acid content of epoxy ester) and a counterpart containing 2.5 wt% vinyl-terminated silicone oil (designated as EAR80–2.5, rosin acid constitutes 80 % of the total carboxylic acid content of epoxy ester). Self-stratifying coatings were fabricated by blending these two resins, with optimal performance observed at a 2:1 (EAR20:EAR80–2.5) mass ratio. During curing, the silicone-containing resin phase preferentially migrated to the surface, forming a distinct silicone-rich upper layer in a one-step process. This stratified architecture yields a hard, hydrophobic surface while preserving robust adhesion and mechanical integrity in the bulk. Compared to the silicone-free coating (with pure EAR20), the self-stratifying coating exhibited a markedly higher surface hardness (pencil hardness increased from B to H) and significantly improved durability. Water resistance in an immersion test extended from 7 days to 12 days without failure, and abrasion resistance increased from 5 ± 1 to 41 ± 2 cycles. The static water contact angle also rose from 75 ± 2° to 89 ± 2°, indicating a more hydrophobic surface. Furthermore, the silicone-rich top layer imparted anti-graffiti functionality, enabling sprayed ink to be easily wiped off without residue. Overall, this silicone oil-induced stratification strategy synergistically enhances both mechanical robustness and surface properties, offering a promising and sustainable route for developing high-performance waterborne coatings.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"209 ","pages":"Article 109622"},"PeriodicalIF":7.3,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144925703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of metal-organic gel (MOG) nanoparticles-enhanced epoxy coating as a pH-sensitive corrosion inhibitor under diverse environmental conditions","authors":"Amir Reza Oroujzadeh ,&nbsp;Ali Nematollahzadeh ,&nbsp;Amin Dabaleh ,&nbsp;Davod Seifzadeh ,&nbsp;Akbar Shojaei","doi":"10.1016/j.porgcoat.2025.109621","DOIUrl":"10.1016/j.porgcoat.2025.109621","url":null,"abstract":"<div><div>Incorporating rigid nanoparticles into epoxy resins enhances anti-corrosion coatings. Still, it often suffers from limited defect-filling ability due to its inherent rigidity, resulting in suboptimal performance under harsh thermophysical and variable pH conditions. This experimental study investigates the effect of metal-organic gel (MOG) nanoparticles as flexible amorphous gels on enhancing the corrosion resistance of epoxy coatings, with a particular focus on the influence of pH. To achieve this, we synthesized an environmentally friendly zirconium-based metal-organic gel (Zr-MOG) nanostructure at various aging temperatures. Characterization techniques were employed to analyze the morphology and structure of Zr-MOGs, confirming the successful synthesis of meso-microporous amorphous xerogels. The pH sensitivity of optimized Zr-MOG nanoparticles (aged at 140 °C) was evaluated in a 3.5 % NaCl solution. The results indicated variations in surface charge formation under various environmental conditions. The active corrosion protection (self-healing) properties of the coatings were assessed <em>via</em> electrochemical impedance spectroscopy (EIS) at various immersion times. The healing efficiency of Zr-MOG-modified epoxy at acidic, neutral, and alkaline pH levels after 24 h was measured to be 472.7 %, 287.8 %, and 208.8 %, respectively, suggesting very efficient corrosion protection at various pH values. Furthermore, field emission scanning electron microscopy (FE-SEM) images of the scratched coating regions confirmed that the Zr-MOG nanoparticle-modified coating (Ep/Zr-MOG-pH-3) exhibited excellent performance in an acidic environment. However, the highest corrosion resistance was exhibited by Ep/Zr-MOG-pH-7, with an impedance value of ~260 kΩ cm². These findings demonstrate the potential of Zr-MOG nanoparticles to improve the performance of epoxy coatings in corrosive conditions.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"209 ","pages":"Article 109621"},"PeriodicalIF":7.3,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144916988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Titanium-boron co-doped organic-inorganic hybrid coatings with enhanced anticorrosion performance","authors":"Haoran Guo ,&nbsp;Rongrong Chen ,&nbsp;Jingyuan Liu ,&nbsp;Dalei Song ,&nbsp;Xinlang Zuo ,&nbsp;Gang Zhu ,&nbsp;Qi Liu ,&nbsp;Jing Yu ,&nbsp;Jiahui Zhu ,&nbsp;Peili Liu","doi":"10.1016/j.porgcoat.2025.109617","DOIUrl":"10.1016/j.porgcoat.2025.109617","url":null,"abstract":"<div><div>Complex marine environments (high salinity, humidity, and temperature) accelerate material degradation, urgently demanding durable coatings with integrated thermal stability and corrosion protection. Currently, phenolic epoxy resins are widely used in marine environments for their excellent corrosion resistance, but their long-term durability is insufficient. In this study, phenyltriethoxysilane (PTES), dimethyldiethoxysilane (DEMS), isopropyl titanate (TPT), and boric acid are employed as functional precursors to synthesize a cross-linked titanium-boron-containing organosilicon resin (TBS) via a facile sol-gel process. The resin is subsequently incorporated into a phenolic epoxy resin (EPN) matrix as a functional modifier, constructing a composite protective system of titanium‑boron co-doped organic-inorganic hybrid coatings with synergistically enhanced anticorrosion performance. The results of the electrochemical impedance spectroscopy (EIS) test show that the hybridized coatings exhibits superior anticorrosive performance when the mass fraction of TBS is 50 %. The low-frequency impedance (|Z|_{0.01 Hz}) remains above 10¹⁰ Ω·cm² after 30 days immersion in 3.5 wt% NaCl solution. In addition, the TBS₁-EPN₁ coating retains the most intact surface after 7 days of immersion in acid/alkali solutions. Meanwhile, the heat resistance of the coating is optimized, with the initial decomposition temperature increases to 233 °C. This study provides an excellent strategy for designing high-performance anticorrosion coatings for marine hydrothermal areas.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"209 ","pages":"Article 109617"},"PeriodicalIF":7.3,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144920250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanically durable PAL-based superhydrophobic composite coatings with a sandwich structure for corrosion protection of aluminum alloys","authors":"Chen-Xiang Wang,&nbsp;Wei Wang,&nbsp;Xue-Fen Zhang","doi":"10.1016/j.porgcoat.2025.109616","DOIUrl":"10.1016/j.porgcoat.2025.109616","url":null,"abstract":"<div><div>Conventional superhydrophobic composite coatings fail to meet the service needs of aluminum alloys in harsh environments due to their inadequate bonding of hydrophobic particles in the topcoat and vulnerability to organic contamination. To address these challenges, a palygorskite-based superhydrophobic composite coating has been developed, inspired by nacre. The coating is composed of an epoxy resin primer and a polydimethylsiloxane (PDMS) strengthened layer with superhydrophobic palygorskite in between, forming a sandwich structure. The effect of PDMS concentration on the coating's wettability, surface morphology, and mechanical durability was thoroughly investigated. Results show that at 0.3 g/mL PDMS concentration, the final coating (ESPP) exhibits optimal abrasion resistance, withstanding an abrasion distance of 8000 cm on 600-grit sandpaper under a 100 g load. When immersed in 3.5 wt% NaCl solution for 44 days, the low-frequency impedance modulus (|Z|_lf) of the ESPP coating maintains as high as 8.34 × 10⁶ Ω∙cm². Even when contaminated with organic contaminants, the coating's corrosion current density is 4 orders of magnitude lower, while its |Z|_lf is four orders of magnitude higher compared to that of the coating lacking the PDMS layer. This study is expected to offer new insights into the design of mechanically robust and oil-resistant superhydrophobic anti-corrosion coatings.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"209 ","pages":"Article 109616"},"PeriodicalIF":7.3,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144916986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dual-layer coatings combining biomimetic surface with chlorophyll/Fe modified water chestnut-shell biochar for antibacterial and protective applications","authors":"Bo-Wei Huang ,&nbsp;Yi-Chen Ou ,&nbsp;Cheng-Zhen Yuan ,&nbsp;Mei-Yi Liao ,&nbsp;Hsiu-Wen Chien","doi":"10.1016/j.porgcoat.2025.109626","DOIUrl":"10.1016/j.porgcoat.2025.109626","url":null,"abstract":"<div><div>The rise of bacterial infections and biofilm-associated issues has increased the demand for multifunctional antibacterial coatings. In this study, we developed a biochar-based material that combines photothermal and photodynamic antibacterial properties. Biochar derived from water chestnut shells (WCSB) exhibits inherent photothermal behavior. After surface modification with a chlorophyll/Fe (Chl/Fe) complex, it also gains the ability to generate reactive oxygen species under 660 nm light. The resulting WCSB@Chl/Fe shows strong singlet oxygen and hydroxyl radical production and achieves a photothermal conversion efficiency of 45 % under 808 nm irradiation. The multifunctional WCSB@Chl/Fe was incorporated into a lotus-leaf-inspired polydimethylsiloxane (PDMS) bilayer coating via spray-coating techniques. The micro-nano surface patterning enhanced hydrophobicity and reduced bacterial adhesion, while the combined photothermal and photodynamic effects led to a 6-log reduction in <em>S. aureus</em> and <em>E. coli</em> populations after light activation. In addition to its antimicrobial efficacy, the coating also demonstrated improved corrosion resistance when applied to metal substrates. These findings highlight the potential of WCSB@Chl/Fe-based coatings as robust and sustainable solutions for biomedical devices and public health surfaces requiring both antibacterial protection and structural durability.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"209 ","pages":"Article 109626"},"PeriodicalIF":7.3,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144916987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}