Progress in Organic Coatings最新文献

英文中文

Dual-denatured protein for phytate-based systems: Purely bio-based coating featuring high flame retardancy and low hygroscopicity

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2025-02-18 DOI: 10.1016/j.porgcoat.2025.109157

Yifan Wang , Guochao Yang , Yi Liu , Lei Yu , Hongwu Guo

To construct a high flame retardant and low moisture absorption biomacromolecule, a bio-based covering was created by combining phytic acid, whey protein, and chitosan. The bio-based flame retardant coating was applied to the wood surface employing water evaporation laminating. Structural investigation of the products of phytic acid and whey protein under heating conditions revealed that the products experienced dual-denatured, namely heat denaturation and acid denaturation. The secondary structural modified in whey protein, including disruption of the spatial structure and peptide bond cleavage. The limiting oxygen index of poplar veneer increased by 22.9 % after flame retardant treatment compared to the pure phytic acid control group. The flame retardant layer provides flame retardancy in both the gas and condensed phase dimensions, thereby considerably increasing the flame retardant performance of composite materials. Covering the coating surface with chitosan film can greatly reduce the hygroscopic defects of phytate-based flame retardants, with the film-coated sample PPCW exhibiting a hygroscopic inhibition rate of 46.92 % after 24 h. Furthermore, this type of treatment can significantly improve the surface coating of water-based paint after utilizing phytic acid-based flame retardants. The hydrogen bonding polymerization of phytic acid-based biomacromolecule has a great potential for use in flame retardant treatment.

{"title":"Dual-denatured protein for phytate-based systems: Purely bio-based coating featuring high flame retardancy and low hygroscopicity","authors":"Yifan Wang , Guochao Yang , Yi Liu , Lei Yu , Hongwu Guo","doi":"10.1016/j.porgcoat.2025.109157","DOIUrl":"10.1016/j.porgcoat.2025.109157","url":null,"abstract":"<div><div>To construct a high flame retardant and low moisture absorption biomacromolecule, a bio-based covering was created by combining phytic acid, whey protein, and chitosan. The bio-based flame retardant coating was applied to the wood surface employing water evaporation laminating. Structural investigation of the products of phytic acid and whey protein under heating conditions revealed that the products experienced dual-denatured, namely heat denaturation and acid denaturation. The secondary structural modified in whey protein, including disruption of the spatial structure and peptide bond cleavage. The limiting oxygen index of poplar veneer increased by 22.9 % after flame retardant treatment compared to the pure phytic acid control group. The flame retardant layer provides flame retardancy in both the gas and condensed phase dimensions, thereby considerably increasing the flame retardant performance of composite materials. Covering the coating surface with chitosan film can greatly reduce the hygroscopic defects of phytate-based flame retardants, with the film-coated sample PPCW exhibiting a hygroscopic inhibition rate of 46.92 % after 24 h. Furthermore, this type of treatment can significantly improve the surface coating of water-based paint after utilizing phytic acid-based flame retardants. The hydrogen bonding polymerization of phytic acid-based biomacromolecule has a great potential for use in flame retardant treatment.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"203 ","pages":"Article 109157"},"PeriodicalIF":6.5,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437842","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}

引用次数: 0

Schiff base modified polyurethane coating with enhanced mechanical property for marine antifouling application

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2025-02-18 DOI: 10.1016/j.porgcoat.2025.109138

Silei Liu , Rongrong Chen , Qi Liu , Jingyuan Liu , Jiahui Zhu , Gaohui Sun , Hongsen Zhang , Jun Wang

Silicone coatings cannot completely prevent the adhesion of marine organisms on hull surfaces under static conditions. In this study, a Schiff base modified polyurethane antifouling coating (PUx-SBSi) was prepared by a facile method. The silicone modified by Schiff base not only retained the low surface energy characteristic, but also effectively addressed the inherent issue of insufficient static antifouling performance in single silicone-based materials. The PUx-SBSi coatings inhibited the adhesion of marine bacteria (Pseudomonas xiamenensis (P. xiamenensis)) up to 95.3 %. Furthermore, the PUx-SBSi coatings exhibited exceptional mechanical property and a significantly higher adhesion strength, with a maximum of 7.3 MPa, which overcome the limitations of inadequate mechanical property and weak adhesion strength of single silicone-based coatings. Therefore, PUx-SBSi coatings with both mechanical properties and static antifouling performance are anticipated to effectively protect ship surfaces from marine organisms, playing a crucial role in the sustainable development of functional coating materials.

{"title":"Schiff base modified polyurethane coating with enhanced mechanical property for marine antifouling application","authors":"Silei Liu , Rongrong Chen , Qi Liu , Jingyuan Liu , Jiahui Zhu , Gaohui Sun , Hongsen Zhang , Jun Wang","doi":"10.1016/j.porgcoat.2025.109138","DOIUrl":"10.1016/j.porgcoat.2025.109138","url":null,"abstract":"<div><div>Silicone coatings cannot completely prevent the adhesion of marine organisms on hull surfaces under static conditions. In this study, a Schiff base modified polyurethane antifouling coating (PUx-SBSi) was prepared by a facile method. The silicone modified by Schiff base not only retained the low surface energy characteristic, but also effectively addressed the inherent issue of insufficient static antifouling performance in single silicone-based materials. The PUx-SBSi coatings inhibited the adhesion of marine bacteria (<em>Pseudomonas xiamenensis</em> (<em>P. xiamenensis</em>)) up to 95.3 %. Furthermore, the PUx-SBSi coatings exhibited exceptional mechanical property and a significantly higher adhesion strength, with a maximum of 7.3 MPa, which overcome the limitations of inadequate mechanical property and weak adhesion strength of single silicone-based coatings. Therefore, PUx-SBSi coatings with both mechanical properties and static antifouling performance are anticipated to effectively protect ship surfaces from marine organisms, playing a crucial role in the sustainable development of functional coating materials.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"203 ","pages":"Article 109138"},"PeriodicalIF":6.5,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437841","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}

引用次数: 0

Enhanced anticorrosion of waterborne epoxy coatings by electrochemical exfoliated graphene oxide

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2025-02-17 DOI: 10.1016/j.porgcoat.2025.109147

Shengle Hao , Shiyu Hou , Yang Liu , Ding Nan , Deping Xu , Wanci Shen , Feiyu Kang , Zheng-Hong Huang

With the increasingly strict control of volatile organic compounds (VOCs), the research and application of waterborne coatings in the field of steel corrosion protection has been widely concerned. Graphene oxide (GO) and functionalized graphene are commonly used in waterborne epoxy coatings for enhanced anticorrosion. However, little attention has been paid to the effect of particle size of GO on the anticorrosion performance of composite coatings and the anticorrosion mechanism. Herein, the particle size and oxidation degree of GO were controlled by optimizing the current intensity of the electrochemical electrode. And the effects of particle size and oxidation degree of GO on the anticorrosion performance and adhesion strength of the composite coatings were also discussed. After 2 days immersion in 3.5 wt% NaCl solution, the impedance modulus |Z|_0.01Hz of GO-3/WEP increased from 1.68 × 10⁷ Ω·cm² to 6.87 × 10⁸ Ω·cm² compared to WEP. In addition, the anticorrosion mechanism of composite epoxy coating was revealed by Raman mapping and molecular dynamics simulation. Reducing the particle size and increasing the oxidation degree of GO sheets can effectively improve the anticorrosion performance of coatings. This work has theoretical significance for further improving the anticorrosion performance of GO-modified waterborne epoxy resin.

{"title":"Enhanced anticorrosion of waterborne epoxy coatings by electrochemical exfoliated graphene oxide","authors":"Shengle Hao , Shiyu Hou , Yang Liu , Ding Nan , Deping Xu , Wanci Shen , Feiyu Kang , Zheng-Hong Huang","doi":"10.1016/j.porgcoat.2025.109147","DOIUrl":"10.1016/j.porgcoat.2025.109147","url":null,"abstract":"<div><div>With the increasingly strict control of volatile organic compounds (VOCs), the research and application of waterborne coatings in the field of steel corrosion protection has been widely concerned. Graphene oxide (GO) and functionalized graphene are commonly used in waterborne epoxy coatings for enhanced anticorrosion. However, little attention has been paid to the effect of particle size of GO on the anticorrosion performance of composite coatings and the anticorrosion mechanism. Herein, the particle size and oxidation degree of GO were controlled by optimizing the current intensity of the electrochemical electrode. And the effects of particle size and oxidation degree of GO on the anticorrosion performance and adhesion strength of the composite coatings were also discussed. After 2 days immersion in 3.5 wt% NaCl solution, the impedance modulus |Z|<sub>0.01Hz</sub> of GO-3/WEP increased from 1.68 × 10<sup>7</sup> Ω·cm<sup>2</sup> to 6.87 × 10<sup>8</sup> Ω·cm<sup>2</sup> compared to WEP. In addition, the anticorrosion mechanism of composite epoxy coating was revealed by Raman mapping and molecular dynamics simulation. Reducing the particle size and increasing the oxidation degree of GO sheets can effectively improve the anticorrosion performance of coatings. This work has theoretical significance for further improving the anticorrosion performance of GO-modified waterborne epoxy resin.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"202 ","pages":"Article 109147"},"PeriodicalIF":6.5,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420433","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}

引用次数: 0

Preparation and properties of octadecylamine modified SiO2/silicon-acrylic coating for concrete anti-snowmelt salt corrosion

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2025-02-17 DOI: 10.1016/j.porgcoat.2025.109155

Lifang Song , Like Zhao , Huiyun Xia , Xu Li , Liying Cui , Yanhui Niu

In this study, silane coupling agent γ-glycidylethoxypropyltrimethoxysiane was employed as an intermediate bridge for grafting octadecylamine (ODA) onto the surface of SiO₂ to obtain hydrophobic modified functional nanoparticles (ODA-SiO₂). The structure of SiO₂ before and after modification was analyzed by FT-IR and XRD, and the successful preparation of ODA-SiO₂ was confirmed. Using γ-methacryloxypropyltrimethoxysilane (MPS) as the organic silicon modifying monomer, a semi-continuous seed emulsion polymerization method was employed to synthesize silicon-acrylic (KSA) emulsion. It was found that the emulsion with a MPS content of 4 % exhibited the best stability and film forming property. The functional composite coating (ODA-SiO₂/KSA) was obtained with different amount of ODA-SiO₂ and coated on the surface of different test boards. The resulting ODA-SiO₂/KSA coating was examined in terms of barrier property, thermal stability and UV aging resistance. It was discovered that the coating exhibited the optimal protective effect when the ODA-SiO₂ was 1.5 wt%. The coatings with this composition were applied to concrete and tested for chloride ion electric flux and chloride freeze-thaw cycles. The results demonstrated that the addition of ODA-SiO₂ enhanced the hydrophobic properties of the coating, improved the impermeability comparing with the pure resin coating, and effectively protected the concrete substrate in snowmelt salt freeze-thaw environments, thereby providing increased corrosion resistance.

{"title":"Preparation and properties of octadecylamine modified SiO2/silicon-acrylic coating for concrete anti-snowmelt salt corrosion","authors":"Lifang Song , Like Zhao , Huiyun Xia , Xu Li , Liying Cui , Yanhui Niu","doi":"10.1016/j.porgcoat.2025.109155","DOIUrl":"10.1016/j.porgcoat.2025.109155","url":null,"abstract":"<div><div>In this study, silane coupling agent γ-glycidylethoxypropyltrimethoxysiane was employed as an intermediate bridge for grafting octadecylamine (ODA) onto the surface of SiO<sub>2</sub> to obtain hydrophobic modified functional nanoparticles (ODA-SiO<sub>2</sub>). The structure of SiO<sub>2</sub> before and after modification was analyzed by FT-IR and XRD, and the successful preparation of ODA-SiO<sub>2</sub> was confirmed. Using γ-methacryloxypropyltrimethoxysilane (MPS) as the organic silicon modifying monomer, a semi-continuous seed emulsion polymerization method was employed to synthesize silicon-acrylic (KSA) emulsion. It was found that the emulsion with a MPS content of 4 % exhibited the best stability and film forming property. The functional composite coating (ODA-SiO<sub>2</sub>/KSA) was obtained with different amount of ODA-SiO<sub>2</sub> and coated on the surface of different test boards. The resulting ODA-SiO<sub>2</sub>/KSA coating was examined in terms of barrier property, thermal stability and UV aging resistance. It was discovered that the coating exhibited the optimal protective effect when the ODA-SiO<sub>2</sub> was 1.5 wt%. The coatings with this composition were applied to concrete and tested for chloride ion electric flux and chloride freeze-thaw cycles. The results demonstrated that the addition of ODA-SiO<sub>2</sub> enhanced the hydrophobic properties of the coating, improved the impermeability comparing with the pure resin coating, and effectively protected the concrete substrate in snowmelt salt freeze-thaw environments, thereby providing increased corrosion resistance.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"202 ","pages":"Article 109155"},"PeriodicalIF":6.5,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428221","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}

引用次数: 0

Femtosecond laser patterning for enhanced hydrophobicity of modified nanocellulose coatings

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2025-02-17 DOI: 10.1016/j.porgcoat.2025.109154

Pieter Samyn , Patrick Cosemans , Olivier Malek

The hydrophobic properties of spray-coated nanocellulose coatings containing modified cellulose microfibrils (mCMFs) or cellulose nanofibrils (mCNFs) that are hydrophobized by deposition of organic nanoparticles with encapsulated wax, can interestingly be improved after surface patterning using ultra-short (femtosecond) pulsed laser processing. In this study, it is demonstrated how the parameters for laser patterning are tuned to create reproducible biaxial grid patterns with optimized resolution and increased hydrophobicity under different power settings (36 to 40 %), repetition rates (250, 500 kHz), hatch pitch sizes (20 to 50 μm) and number of processing layers. A relatively small laser processing window (39 % laser power, 500 kHz rate) was identified resulting in an increase in sessile water contact angles from 118° to 158° (mCMF coatings) or 98° to 122° (mCNF coatings), corresponding with contact angle hysteresis of 28° (mCMF coatings) or 23° (mCNF coatings). For different pattern geometries, experimental water contact angles could be predicted from trends following the theoretical Cassie-Baxter equation. Moreover, the structural changes in hydrophobic nanocellulose coatings after laser processing were demonstrated through spectroscopic analysis, indicating the enhanced hydrogen bonding and progressive development of more ordered cellulose structures under moderate or optimized power settings. In future, the femtosecond laser patterning can be applied as industrially scalable technology to tune hydrophobic properties and performance of nanocellulose coatings by selecting given pattern geometries and processing conditions.

{"title":"Femtosecond laser patterning for enhanced hydrophobicity of modified nanocellulose coatings","authors":"Pieter Samyn , Patrick Cosemans , Olivier Malek","doi":"10.1016/j.porgcoat.2025.109154","DOIUrl":"10.1016/j.porgcoat.2025.109154","url":null,"abstract":"<div><div>The hydrophobic properties of spray-coated nanocellulose coatings containing modified cellulose microfibrils (mCMFs) or cellulose nanofibrils (mCNFs) that are hydrophobized by deposition of organic nanoparticles with encapsulated wax, can interestingly be improved after surface patterning using ultra-short (femtosecond) pulsed laser processing. In this study, it is demonstrated how the parameters for laser patterning are tuned to create reproducible biaxial grid patterns with optimized resolution and increased hydrophobicity under different power settings (36 to 40 %), repetition rates (250, 500 kHz), hatch pitch sizes (20 to 50 μm) and number of processing layers. A relatively small laser processing window (39 % laser power, 500 kHz rate) was identified resulting in an increase in sessile water contact angles from 118° to 158° (mCMF coatings) or 98° to 122° (mCNF coatings), corresponding with contact angle hysteresis of 28° (mCMF coatings) or 23° (mCNF coatings). For different pattern geometries, experimental water contact angles could be predicted from trends following the theoretical Cassie-Baxter equation. Moreover, the structural changes in hydrophobic nanocellulose coatings after laser processing were demonstrated through spectroscopic analysis, indicating the enhanced hydrogen bonding and progressive development of more ordered cellulose structures under moderate or optimized power settings. In future, the femtosecond laser patterning can be applied as industrially scalable technology to tune hydrophobic properties and performance of nanocellulose coatings by selecting given pattern geometries and processing conditions.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"202 ","pages":"Article 109154"},"PeriodicalIF":6.5,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428220","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}

引用次数: 0

Reduction of aggregation in NIR-absorbing films with heptamethine cyanine dyes through steric hindrance and polymer interaction

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2025-02-17 DOI: 10.1016/j.porgcoat.2025.109139

Dong Jun Lee , Hyun Kyu Lee , Jun Ho Yoon , Hong Mo Kim , Woo Jin Choi , Suhyeon Kim , Wan Soo Kim , Yoo Sang Kim , Seong Hyun Jang , Chaelin Park , Tae Gyu Hwang , Jae Pil Kim

Near-infrared (NIR) absorbing films are essential components of CMOS image sensors. To address aggregation issues in benzo[cd]indolenyl-substituted heptamethine cyanines, we synthesized four derivatives with meso-position substituents designed to increase steric hindrance and enhance polymer interactions. These modifications effectively reduced aggregation and improved film performance. Cyanine dyes with stronger steric hindrance (e.g., Cy-5eB) mitigated aggregation in polystyrene (PS) films, while those with stronger polymer interactions (e.g., Cy-5caB) performed better in cyclic olefin polymer (COP) films. Furthermore, Cy-5caB exhibited enhanced thermal stability in COP films, indicating that increasing polymer interactions not only reduces aggregation but also improves thermal stability.

引用次数: 0

Hollow amorphous TiO2 particles for transparent UV shielding film

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2025-02-17 DOI: 10.1016/j.porgcoat.2025.109141

Nichapat Pukveera , Duangporn Polpanich , Yodsathorn Wongngam , Pramuan Tangboriboonrat , Teeraporn Suteewong

Crystalline titanium dioxide (C-TiO₂) particles are widely used as inorganic filters in coatings due to their high refractive indexes (n) and functions in photocatalysis. However, these particles may pose environmental and health risks due to their crystalline nature. Additionally, the long-term use of C-TiO₂ has the potential to damage organic contents due to their photocatalytic properties. These drawbacks make amorphous TiO₂ (A-TiO₂) appealing for use in non-catalysis applications, e.g., coatings. This study aims to develop an alternative UV filter derived from A-TiO₂ with a hollow structure (HA-TiO₂) that can be used in coatings. The hollow interior of the designed HA-TiO₂ structure compensates for its lower n through multiple light scattering, enhancing the UV shielding performance. Furthermore, the amorphous structure also promotes the transparency of the composite film. To obtain HA-TiO₂, TiO₂-coated silica (SiO₂@TiO₂) particles were synthesized using the modified sol-gel method. Selective etching was employed to remove the dense (D) SiO₂ core (hard template). The resulting HA-TiO₂ particles possessed higher UV absorption properties than D-SiO₂, SiO₂@TiO₂, dense amorphous (DA) TiO₂ particles, and commercial C-TiO₂ (TiONA® 595, rutile). Poly(vinyl alcohol) films containing HA-TiO₂ particles displayed the highest UV shielding performance, effectively blocking the photodegradation of methylene blue while maintaining film transparency. The integration of high UV shielding performance of the hollow structure and transparency of the amorphous matter provided synergistic effects. Overall, HA-TiO₂ shows promise as a safer alternative to current inorganic UV filters in a variety of applications, including coatings, textiles, and packaging.

{"title":"Hollow amorphous TiO2 particles for transparent UV shielding film","authors":"Nichapat Pukveera , Duangporn Polpanich , Yodsathorn Wongngam , Pramuan Tangboriboonrat , Teeraporn Suteewong","doi":"10.1016/j.porgcoat.2025.109141","DOIUrl":"10.1016/j.porgcoat.2025.109141","url":null,"abstract":"<div><div>Crystalline titanium dioxide (C-TiO<sub>2</sub>) particles are widely used as inorganic filters in coatings due to their high refractive indexes (n) and functions in photocatalysis. However, these particles may pose environmental and health risks due to their crystalline nature. Additionally, the long-term use of C-TiO<sub>2</sub> has the potential to damage organic contents due to their photocatalytic properties. These drawbacks make amorphous TiO<sub>2</sub> (A-TiO<sub>2</sub>) appealing for use in non-catalysis applications, e.g., coatings. This study aims to develop an alternative UV filter derived from A-TiO<sub>2</sub> with a hollow structure (HA-TiO<sub>2</sub>) that can be used in coatings. The hollow interior of the designed HA-TiO<sub>2</sub> structure compensates for its lower n through multiple light scattering, enhancing the UV shielding performance. Furthermore, the amorphous structure also promotes the transparency of the composite film. To obtain HA-TiO<sub>2</sub>, TiO<sub>2</sub>-coated silica (SiO<sub>2</sub>@TiO<sub>2</sub>) particles were synthesized using the modified sol-gel method. Selective etching was employed to remove the dense (D) SiO<sub>2</sub> core (hard template). The resulting HA-TiO<sub>2</sub> particles possessed higher UV absorption properties than D-SiO<sub>2</sub>, SiO<sub>2</sub>@TiO<sub>2</sub>, dense amorphous (DA) TiO<sub>2</sub> particles, and commercial C-TiO<sub>2</sub> (TiONA® 595, rutile). Poly(vinyl alcohol) films containing HA-TiO<sub>2</sub> particles displayed the highest UV shielding performance, effectively blocking the photodegradation of methylene blue while maintaining film transparency. The integration of high UV shielding performance of the hollow structure and transparency of the amorphous matter provided synergistic effects. Overall, HA-TiO<sub>2</sub> shows promise as a safer alternative to current inorganic UV filters in a variety of applications, including coatings, textiles, and packaging.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"202 ","pages":"Article 109141"},"PeriodicalIF":6.5,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428223","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}

引用次数: 0

Enhancing fire safety and transparency: Phytic acid-based flame-retardant coatings with silicon dioxide synergistic effect for polyacrylate substrates

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2025-02-17 DOI: 10.1016/j.porgcoat.2025.109140

Fei Hu, Yu Cai, Yuhui Xie, Hui Jiang, Feng Wu, Dong Feng, Yang Meng, Yi Mei, Delong Xie

The development of transparent flame-retardant coatings has garnered significant attention due to their potential applications in enhancing fire safety while maintaining aesthetic appeal. This study investigates the synthesis and characterization of a phosphorus‑nitrogen (PN) synergistic flame-retardant system, referred to as PD, which is synthesized from phytic acid (PA) and dicyandiamide (DICY) for polyacrylate substrates. Through a series of experimental analyses including XPS, FTIR, TGA, SEM-EDS, and cone calorimetry, the flame-retardant efficacy and mechanisms of the PD/SiO₂ composite were investigated. The results demonstrate that the incorporation of PD/SiO₂ effectively enhances the flame retardancy of polyacrylate coatings, manifesting promising gas-phase and condensed-phase flame retardant effects. The coatings exhibit excellent stability, compatibility, and adhesion with polyacrylate substrates, while maintaining high levels of light transmittance and mechanical properties. Moreover, the optimized formulations show improved water resistance and meet stringent flame-retardant standards such as LOI and UL-94. The study underscores the potential of transparent flame-retardant coatings in various industries and highlights avenues for further optimization and practical application.

{"title":"Enhancing fire safety and transparency: Phytic acid-based flame-retardant coatings with silicon dioxide synergistic effect for polyacrylate substrates","authors":"Fei Hu, Yu Cai, Yuhui Xie, Hui Jiang, Feng Wu, Dong Feng, Yang Meng, Yi Mei, Delong Xie","doi":"10.1016/j.porgcoat.2025.109140","DOIUrl":"10.1016/j.porgcoat.2025.109140","url":null,"abstract":"<div><div>The development of transparent flame-retardant coatings has garnered significant attention due to their potential applications in enhancing fire safety while maintaining aesthetic appeal. This study investigates the synthesis and characterization of a phosphorus‑nitrogen (P<img>N) synergistic flame-retardant system, referred to as PD, which is synthesized from phytic acid (PA) and dicyandiamide (DICY) for polyacrylate substrates. Through a series of experimental analyses including XPS, FTIR, TGA, SEM-EDS, and cone calorimetry, the flame-retardant efficacy and mechanisms of the PD/SiO<sub>2</sub> composite were investigated. The results demonstrate that the incorporation of PD/SiO<sub>2</sub> effectively enhances the flame retardancy of polyacrylate coatings, manifesting promising gas-phase and condensed-phase flame retardant effects. The coatings exhibit excellent stability, compatibility, and adhesion with polyacrylate substrates, while maintaining high levels of light transmittance and mechanical properties. Moreover, the optimized formulations show improved water resistance and meet stringent flame-retardant standards such as LOI and UL-94. The study underscores the potential of transparent flame-retardant coatings in various industries and highlights avenues for further optimization and practical application.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"202 ","pages":"Article 109140"},"PeriodicalIF":6.5,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428219","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}

引用次数: 0

Corrosion monitoring beneath damaged coatings with localized pores on steel piles using distributed optical fiber sensors

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2025-02-16 DOI: 10.1016/j.porgcoat.2025.109150

Liang Fan , Bin Li , Qian Pang , Wei Shen , Baoyin Sun

Coated steel piles with high corrosion resistance are applied in the marine environment. However, coating damage is unavoidable during its application process, which can induce severe localized corrosion and corrosion perforation of coated steel piles, and even premature failure of the whole marine structures. Thus, in-situ monitoring of localized corrosion under coated steel pile surface is necessary to provide localized corrosion severity assessment. This study embedded a distributed optical fiber sensor inside the marine organic coating applied on the steel pile surface and monitored the localized steel corrosion under the damaged coating. The strain measured from the sensors were applied to analyze corrosion products induced coating deformation and the development and propagation of localized corrosion. The central depth models of localized corrosion pits were established based on the number of optical fibers and the relative position between the localized corrosion center and adjacent optical fibers. The parameters of the models such as expansion coefficient of corrosion area and volume expansion rate were quantified through calibration experiments. Thus, based on the corrected models and real-time monitoring data, time-dependent central depths of the localized corrosion pits were obtained, which was validated with corrosion pits of various positions and orientations on the tested steel pipes.

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引用次数: 0

Effect of zinc anodes on the behaviour of antifouling coatings applied on copper alloys

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2025-02-16 DOI: 10.1016/j.porgcoat.2025.109153

Erica Tubaro , Lorenzo Del Fabro , Matteo Pesle , Alessandra Bontempi , Lorenzo Fedrizzi , Francesco Andreatta

This study investigates antifouling coatings for the corrosion protection of bronze propellers in pleasure boats, cathodically protected by sacrificial anodes. Currently, no standards exist to evaluate their resistance to cathodic delamination. This work develops a specific testing procedure using electrochemical methods to assess cathodic delamination in coated bronze panels. Samples with various antifouling formulations were characterized for cathodic disbonding resistance and barrier properties, with coating morphology analysed via SEM. Accelerated cathodic disbonding tests in artificial seawater at −2 V vs Ag/AgCl were evaluated through Potentiodynamic and Potentiostatic Polarization and Electrochemical Impedance Spectroscopy (EIS).

Results showed that increasing pigment volume concentration (PVC) in the primer enhanced delamination resistance by limiting aggressive species transport. Adding a silane adhesion promoter further reduced delaminated areas and improved adhesion, though slightly reducing barrier properties due to increased water uptake. Replacing a graphite-containing topcoat with a titanium dioxide-based (white) one significantly improved both barrier properties and cathodic disbonding resistance. EIS confirmed that titanium dioxide coatings exhibited higher impedance than graphite-rich ones, due to the absence of conductive regions in the white topcoat.

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引用次数: 0

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