Pub Date : 2026-01-16DOI: 10.1016/j.porgcoat.2026.109963
Shahidul Islam Bhat , Sharif Ahmad
High-performance oleo-hyperbranched sustainable polyesters (HBPE) are gaining a great deal of attention because of their strong anticorrosive features, low fluidity, high viscosity, with low or no volatile organic compound content. These characteristics make them useful materials for developing high-performance, inexpensive, and sustainable polymer coatings. The synthesis, characterization and electrochemical corrosion studies on TiO2 dispersed hyper-branched castor oil polyester nanocomposite coatings have been reported. FT-IR, NMR (1H, 13C), and GPC methods were used to investigate the structural characteristics, degree of branching and molecular weight distribution. Standard methods were used to assess the water-repellent qualities, glass transition temperature, thermal stability, physico-chemical, and physico-mechanical aspects. Potentiodynamic Polarization (PDP) and electrochemical impedance spectroscopy (EIS) were used to evaluate the anticorrosive performance of bare carbon steel (CS), HBPE-PBMF-80, and HBPE-PBMF-80-TiO₂-x coatings (x = 0.5, 1.0, and 1.5 wt. % TiO₂). These findings demonstrated that, in comparison to HBPE-PBMF-80 and other previously documented systems, the HBPE-PBMF-TiO₂-x nanocomposite coatings display significantly improved physico-mechanical properties and corrosion resistance.
{"title":"Oleo-hyperbranched polyester nanocomposites: Synthesis, characterization and electrochemical corrosion protection evaluation","authors":"Shahidul Islam Bhat , Sharif Ahmad","doi":"10.1016/j.porgcoat.2026.109963","DOIUrl":"10.1016/j.porgcoat.2026.109963","url":null,"abstract":"<div><div>High-performance oleo-hyperbranched sustainable polyesters (HBPE) are gaining a great deal of attention because of their strong anticorrosive features, low fluidity, high viscosity, with low or no volatile organic compound content. These characteristics make them useful materials for developing high-performance, inexpensive, and sustainable polymer coatings. The synthesis, characterization and electrochemical corrosion studies on TiO<sub>2</sub> dispersed hyper-branched castor oil polyester nanocomposite coatings have been reported. FT-IR, NMR (<sup>1</sup>H, <sup>13</sup>C), and GPC methods were used to investigate the structural characteristics, degree of branching and molecular weight distribution. Standard methods were used to assess the water-repellent qualities, glass transition temperature, thermal stability, physico-chemical, and physico-mechanical aspects. Potentiodynamic Polarization (PDP) and electrochemical impedance spectroscopy (EIS) were used to evaluate the anticorrosive performance of bare carbon steel (CS), HBPE-PBMF-80, and HBPE-PBMF-80-TiO₂-x coatings (x = 0.5, 1.0, and 1.5 wt. % TiO₂). These findings demonstrated that, in comparison to HBPE-PBMF-80 and other previously documented systems, the HBPE-PBMF-TiO₂-x nanocomposite coatings display significantly improved physico-mechanical properties and corrosion resistance.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"213 ","pages":"Article 109963"},"PeriodicalIF":7.3,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145978396","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}
Pub Date : 2026-01-16DOI: 10.1016/j.porgcoat.2025.109919
Nina Straub , Stefan Veigel , Jan Janesch , Célia Lointier , Claudia Gusenbauer , Christian Hansmann , Wolfgang Gindl-Altmutter
Protection of wood against environmental degradation requires advanced surface protection strategies like imitating nature's lotus effect, characterized by the superhydrophobic surface of lotus leaves with hierarchical micro- and nanoscale structures. This study replicates said phenomenon by coating wood surfaces with cellulose nanocrystals (CNCs) derived from cotton linters. At first, microcrystalline cellulose was converted to CNCs by high-pressure homogenization and subsequent hydrophobization using esterification with lauroyl chloride. The resulting lauroyl-modified CNCs (LCNC) were dispersed in a non-polar solvent at 2 wt% and applied to beech wood specimens in a low quantity of 0.8–1.6 g/m2 by spraying. ATR-FTIR and 13C NMR measurements confirmed a successful modification. Water contact angle measurements (WCA) verified successful hydrophobization of LCNCs demonstrating WCAs up to 150° on pressed LCNC pellets. Wood surfaces coated with LCNCs showed enhanced hydrophobicity over a 10 min time period with initial WCAs up to 125°, surpassing those of commercial oil-based wood coatings. Additionally, the coating was highly transparent, preserving the natural color, gloss, and brightness of wood. The present study demonstrates that coating with hydrophobized CNCs enables transparent, and highly hydrophobic wood surfaces with enhanced abrasion resistance, thus offering an effective and visually unobtrusive strategy for green wood protection.
{"title":"Bio-inspired transparent, hydrophobic, and mechanically stable wood coating by cellulose nanocrystals","authors":"Nina Straub , Stefan Veigel , Jan Janesch , Célia Lointier , Claudia Gusenbauer , Christian Hansmann , Wolfgang Gindl-Altmutter","doi":"10.1016/j.porgcoat.2025.109919","DOIUrl":"10.1016/j.porgcoat.2025.109919","url":null,"abstract":"<div><div>Protection of wood against environmental degradation requires advanced surface protection strategies like imitating nature's lotus effect, characterized by the superhydrophobic surface of lotus leaves with hierarchical micro- and nanoscale structures. This study replicates said phenomenon by coating wood surfaces with cellulose nanocrystals (CNCs) derived from cotton linters. At first, microcrystalline cellulose was converted to CNCs by high-pressure homogenization and subsequent hydrophobization using esterification with lauroyl chloride. The resulting lauroyl-modified CNCs (LCNC) were dispersed in a non-polar solvent at 2 wt% and applied to beech wood specimens in a low quantity of 0.8–1.6 g/m<sup>2</sup> by spraying. ATR-FTIR and <sup>13</sup>C NMR measurements confirmed a successful modification. Water contact angle measurements (WCA) verified successful hydrophobization of LCNCs demonstrating WCAs up to 150° on pressed LCNC pellets. Wood surfaces coated with LCNCs showed enhanced hydrophobicity over a 10 min time period with initial WCAs up to 125°, surpassing those of commercial oil-based wood coatings. Additionally, the coating was highly transparent, preserving the natural color, gloss, and brightness of wood. The present study demonstrates that coating with hydrophobized CNCs enables transparent, and highly hydrophobic wood surfaces with enhanced abrasion resistance, thus offering an effective and visually unobtrusive strategy for green wood protection.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"213 ","pages":"Article 109919"},"PeriodicalIF":7.3,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145978393","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}
An eco-friendly, solvent-free waterborne hydroxyacrylate dispersion was developed using a castor-oil hyperbranched polyester polyol (COHPE) as a reactive diluent, enabling the preparation of two-component waterborne polyurethane (2 K WPU) coatings with intrinsic damping functionality. The COHPE was synthesized via esterification and incorporated into the waterborne hydroxyacrylate system to simultaneously reduce viscosity and enhance processability without the use of volatile organic solvents (VOC). The resulting dispersion (COHPE-WA-30) exhibited excellent colloidal stability and uniform particle sizes, while the cured films demonstrated a break strength of 6.81 MPa, elongation at break of 22.26%, and a static water contact angle of 86.2° ± 0.19°. Dynamic mechanical analysis (DMA) revealed the tan δ value remains greater than 0.3 within the temperature range of 43–101 °C, confirming superior damping performance. Moreover, the solvent-low 2 K WPU coatings achieved excellent adhesion (5B), gloss, and solvent resistance, combined with enhanced thermal stability. This study establishes an environmentally benign and scalable approach for fabricating high-performance 2 K WPU coatings that integrate renewable materials, solvent-low processing, and multifunctional mechanical-damping behavior.
以蓖麻油超支化聚酯多元醇（COHPE）为活性稀释剂，开发了一种环保型无溶剂水性羟基丙烯酸酯分散体，可制备具有固有阻尼功能的双组分水性聚氨酯（2k WPU）涂料。在不使用挥发性有机溶剂（VOC）的情况下，通过酯化反应合成了COHPE，并将其加入水性羟丙烯酸酯体系中，同时降低了粘度并提高了加工性。得到的分散体（COHPE-WA-30）具有良好的胶体稳定性和均匀的粒径，固化膜的断裂强度为6.81 MPa，断裂伸长率为22.26%，静态水接触角为86.2°±0.19°。动态力学分析（DMA）表明，在43 ~ 101℃的温度范围内，tan δ值保持在0.3以上，具有良好的阻尼性能。此外，低溶剂的2 K WPU涂层具有优异的附着力（5B），光泽度和耐溶剂性，并具有增强的热稳定性。本研究建立了一种环保且可扩展的方法来制造高性能的2k WPU涂层，该涂层集成了可再生材料、低溶剂加工和多功能机械阻尼性能。
{"title":"Eco-friendly solvent-free waterborne hydroxyacrylate dispersions based on bio-based castor oil hyperbranched polyols for two-component polyurethane coatings with damping performance","authors":"Yuan Duan , Lingjia Qiu , Mengting Zhang , Yongbo Ding , Peilin Wang , Liang Shen","doi":"10.1016/j.porgcoat.2026.109961","DOIUrl":"10.1016/j.porgcoat.2026.109961","url":null,"abstract":"<div><div>An eco-friendly, solvent-free waterborne hydroxyacrylate dispersion was developed using a castor-oil hyperbranched polyester polyol (COHPE) as a reactive diluent, enabling the preparation of two-component waterborne polyurethane (2 K WPU) coatings with intrinsic damping functionality. The COHPE was synthesized via esterification and incorporated into the waterborne hydroxyacrylate system to simultaneously reduce viscosity and enhance processability without the use of volatile organic solvents (VOC). The resulting dispersion (COHPE-WA-30) exhibited excellent colloidal stability and uniform particle sizes, while the cured films demonstrated a break strength of 6.81 MPa, elongation at break of 22.26%, and a static water contact angle of 86.2° ± 0.19°. Dynamic mechanical analysis (DMA) revealed the tan δ value remains greater than 0.3 within the temperature range of 43–101 °C, confirming superior damping performance. Moreover, the solvent-low 2 K WPU coatings achieved excellent adhesion (5B), gloss, and solvent resistance, combined with enhanced thermal stability. This study establishes an environmentally benign and scalable approach for fabricating high-performance 2 K WPU coatings that integrate renewable materials, solvent-low processing, and multifunctional mechanical-damping behavior.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"213 ","pages":"Article 109961"},"PeriodicalIF":7.3,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979009","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}
Pub Date : 2026-01-15DOI: 10.1016/j.porgcoat.2026.109965
Lin Zhao , Tianhui Hao , Xinghe Jin , Chao Wang , Zhiqiang Xu , Jifeng Zhang , Haotian Guo
Ice accumulation severely threatens the safe operation of critical systems, and passive icephobic surfaces have attracted significant attention as an effective strategy. Conventionally, slippery liquid-infused porous surfaces (SLIPS) achieve ultralow ice adhesion, but the durability is undermined by lubricant depletion under complex environmental conditions. In this study, we propose a phase-change-driven solid-state lubricating icephobic surfaces (PLIPS), which achieves nearly zero ice adhesion through interfacial physical isolation, and the performance can be fully regenerated through lubricant replenishment and in-situ absorption. The coating consists of a gel network formed by blending epoxy resin, polydimethylsiloxane, and alkanes, where the alkanes crystallize and migrate toward the surface driven by low temperature, forming a porous solid lubricating layer at the ice-coating interface, which serves as a thermal barrier and physically separates the ice from the substrate. Through systematic investigation of lubricant migration, phase transition, and replenishment behavior, the PLIPS achieved nearly zero ice adhesion strength and a 137% longer droplet freezing delay (1018 s at −20 °C) compared with the PDMS-only control. After 30 icing–deicing cycles, ice adhesion remained extremely low (< 35 kPa), and the initial performance could be fully restored through simple thermal immersion for lubricant replenishment. This work provides a novel strategy for durable and replenishable anti-icing coatings.
{"title":"Phase-change-driven solid lubricating coatings with ultralow ice adhesion and replenishable functionality","authors":"Lin Zhao , Tianhui Hao , Xinghe Jin , Chao Wang , Zhiqiang Xu , Jifeng Zhang , Haotian Guo","doi":"10.1016/j.porgcoat.2026.109965","DOIUrl":"10.1016/j.porgcoat.2026.109965","url":null,"abstract":"<div><div>Ice accumulation severely threatens the safe operation of critical systems, and passive icephobic surfaces have attracted significant attention as an effective strategy. Conventionally, slippery liquid-infused porous surfaces (SLIPS) achieve ultralow ice adhesion, but the durability is undermined by lubricant depletion under complex environmental conditions. In this study, we propose a phase-change-driven solid-state lubricating icephobic surfaces (PLIPS), which achieves nearly zero ice adhesion through interfacial physical isolation, and the performance can be fully regenerated through lubricant replenishment and in-situ absorption. The coating consists of a gel network formed by blending epoxy resin, polydimethylsiloxane, and alkanes, where the alkanes crystallize and migrate toward the surface driven by low temperature, forming a porous solid lubricating layer at the ice-coating interface, which serves as a thermal barrier and physically separates the ice from the substrate. Through systematic investigation of lubricant migration, phase transition, and replenishment behavior, the PLIPS achieved nearly zero ice adhesion strength and a 137% longer droplet freezing delay (1018 s at −20 °C) compared with the PDMS-only control. After 30 icing–deicing cycles, ice adhesion remained extremely low (< 35 kPa), and the initial performance could be fully restored through simple thermal immersion for lubricant replenishment. This work provides a novel strategy for durable and replenishable anti-icing coatings.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"213 ","pages":"Article 109965"},"PeriodicalIF":7.3,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145978391","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}
Pub Date : 2026-01-15DOI: 10.1016/j.porgcoat.2026.109966
Xiaodong Jiang , Zichen Li , Jinmei Du , Yang Jiang , Jiankun Wang , Changhai Xu
Passive radiative cooling (PRC) has attracted considerable attention in personal thermal management due to its zero-energy consumption and zero-pollution. However, PRC textiles in outdoor applications are susceptible to contamination, resulting in performance degradation. Inspired by the self-cleaning surface of lotus leaves, a biomimetic superhydrophobic cotton fabric for long-term passive radiative cooling was successfully fabricated by constructing ZIF-L/ZIF-8 micro-nanostructures and combining with polymethylhydrosiloxane (PMHS) coatings. This multistage micro-nanostructure significantly enhanced the optical properties of cotton fabric, increasing the solar reflectance from 64.5% to 90.4% and the infrared emissivity from 93.0% to 95.8%. Furthermore, the superhydrophobic fabric demonstrated excellent radiative cooling performance, achieving a cooling effect of 5.3 °C under solar irradiation compared with cotton fabric. In particular, the fabric exhibited superior superhydrophobicity with a water contact angle (WCA) of 162.8°, and maintained the WCA of over 150° under severe conditions such as soaking in acids, alkalis and salts, ultrasonic treatment, washing, tape peeling and abrasion. Most importantly, the fabric offers an efficient self-cleaning property, making it suitable for long-term outdoor radiative cooling. The biomimetic superhydrophobic fabric integrates radiative cooling and self-cleaning functions, providing a promising solution for the development of green, energy-saving and sustainable PRC textiles.
{"title":"Biomimetic superhydrophobic cotton fabrics with multistage micro-nanostructures for long-term passive radiative cooling","authors":"Xiaodong Jiang , Zichen Li , Jinmei Du , Yang Jiang , Jiankun Wang , Changhai Xu","doi":"10.1016/j.porgcoat.2026.109966","DOIUrl":"10.1016/j.porgcoat.2026.109966","url":null,"abstract":"<div><div>Passive radiative cooling (PRC) has attracted considerable attention in personal thermal management due to its zero-energy consumption and zero-pollution. However, PRC textiles in outdoor applications are susceptible to contamination, resulting in performance degradation. Inspired by the self-cleaning surface of lotus leaves, a biomimetic superhydrophobic cotton fabric for long-term passive radiative cooling was successfully fabricated by constructing ZIF-L/ZIF-8 micro-nanostructures and combining with polymethylhydrosiloxane (PMHS) coatings. This multistage micro-nanostructure significantly enhanced the optical properties of cotton fabric, increasing the solar reflectance from 64.5% to 90.4% and the infrared emissivity from 93.0% to 95.8%. Furthermore, the superhydrophobic fabric demonstrated excellent radiative cooling performance, achieving a cooling effect of 5.3 °C under solar irradiation compared with cotton fabric. In particular, the fabric exhibited superior superhydrophobicity with a water contact angle (WCA) of 162.8°, and maintained the WCA of over 150° under severe conditions such as soaking in acids, alkalis and salts, ultrasonic treatment, washing, tape peeling and abrasion. Most importantly, the fabric offers an efficient self-cleaning property, making it suitable for long-term outdoor radiative cooling. The biomimetic superhydrophobic fabric integrates radiative cooling and self-cleaning functions, providing a promising solution for the development of green, energy-saving and sustainable PRC textiles.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"213 ","pages":"Article 109966"},"PeriodicalIF":7.3,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979008","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}
Pub Date : 2026-01-15DOI: 10.1016/j.porgcoat.2026.109964
Jing Wang , Chen Feng , Jian Liu , Haocheng Zhao , Zhaoyang Liu , Jinchun Wang , Xiangming Kong
Moisture uptake and the resulting changes in mechanical properties of polymer-based waterproofing membranes were investigated. Pure polymer membrane (PM), polymer–CaCO₃ (PCC), and polymer–white cement (PWC) membranes were prepared using styrene–acrylate (SA), vinyl acetate–ethylene (VAE), and styrene–butadiene (SBR) latexes and exposed to 100% relative humidity for 30 days. All membranes exhibit decreased tensile strength and fracture energy after moisture exposure. Low-field NMR enables quantification of three moisture types in the membranes, including polymer-absorbed water (H₂Owip), interfacial water (H₂Oint), and free water (H₂Of). After moisture treatment, [H₂O]int and [H₂O]f are highly related to latex particle size and emulsifier content, with SBR-based membranes showing the highest values due to the smallest particle size and highest emulsifier content. In PM and PCC membranes, [H₂O]wip is majorly determined by polymer hydrophobicity, following the order SBR > SA > VAE. In PWC membranes, [H₂O]wip is extremely high in VAE-PWC due to polymer saponification. The reduction in fracture energy is primarily governed by [H₂O]wip, because of the plasticizing effect of H₂Owip that weakens intermolecular forces. Consequently, VAE-based membranes undergo the most pronounced fracture energy decline in all systems, while SBR-based membranes exhibit the lowest decrease in PM and PCC membranes, and SA-PWC shows the least degradation in PWC membranes. Secondary cement hydration occurs in both SA-PWC and VAE-PWC during moisture treatment, but is minimal in SBR-PWC. Secondary hydration, high water-absorptivity of hydration products, osmotic pressure, instability of polymer, and hindered latex film formation, are possible causes for higher moisture uptake of PWC.
研究了聚合物基防水膜的吸湿性及其对力学性能的影响。采用苯乙烯-丙烯酸酯（SA）、醋酸乙烯-乙烯（VAE）和丁苯乙烯（SBR）乳胶制备了纯聚合物膜（PM）、聚合物-碳酸钙₃（PCC）和聚合物-白水泥（PWC）膜，并在100%相对湿度下暴露30天。所有膜在受潮后都表现出抗拉强度和断裂能的下降。低场核磁共振可以量化膜中的三种水分类型，包括聚合物吸收水（H₂Owip），界面水（H₂point）和自由水（H₂of）。水分处理后，[H₂O]int和[H₂O]f与乳胶粒径和乳化剂含量密切相关，其中sbr基膜粒径最小，乳化剂含量最高，值最高。在PM和PCC膜中，[H₂O]wip主要由聚合物疏水性决定，顺序为SBR >； SA >； VAE。在PWC膜中，由于聚合物皂化，[H₂O]wip在vee -PWC中的含量极高。断裂能的降低主要受[H₂O]wip的控制，因为H₂Owip的塑化作用减弱了分子间的作用力。因此，在所有体系中，基于vae的膜的破裂能下降最为明显，而基于sbr的膜的PM和PCC膜的下降幅度最小，而SA-PWC膜的破裂能下降幅度最小。在水分处理过程中，SA-PWC和VAE-PWC都发生了二次水泥水化，但SBR-PWC的水化程度最低。二次水化、水化产物的高吸水性、渗透压、聚合物的不稳定性以及阻碍乳胶膜形成是导致普华永道吸湿率较高的可能原因。
{"title":"Moisture responses of polymer-cement waterproofing membranes prepared with different type of polymer latexes","authors":"Jing Wang , Chen Feng , Jian Liu , Haocheng Zhao , Zhaoyang Liu , Jinchun Wang , Xiangming Kong","doi":"10.1016/j.porgcoat.2026.109964","DOIUrl":"10.1016/j.porgcoat.2026.109964","url":null,"abstract":"<div><div>Moisture uptake and the resulting changes in mechanical properties of polymer-based waterproofing membranes were investigated. Pure polymer membrane (PM), polymer–CaCO₃ (PCC), and polymer–white cement (PWC) membranes were prepared using styrene–acrylate (SA), vinyl acetate–ethylene (VAE), and styrene–butadiene (SBR) latexes and exposed to 100% relative humidity for 30 days. All membranes exhibit decreased tensile strength and fracture energy after moisture exposure. Low-field NMR enables quantification of three moisture types in the membranes, including polymer-absorbed water (H₂O<sub>wip</sub>), interfacial water (H₂O<sub>int</sub>), and free water (H₂O<sub>f</sub>). After moisture treatment, [H₂O]<sub>int</sub> and [H₂O]<sub>f</sub> are highly related to latex particle size and emulsifier content, with SBR-based membranes showing the highest values due to the smallest particle size and highest emulsifier content. In PM and PCC membranes, [H₂O]<sub>wip</sub> is majorly determined by polymer hydrophobicity, following the order SBR > SA > VAE. In PWC membranes, [H₂O]<sub>wip</sub> is extremely high in VAE-PWC due to polymer saponification. The reduction in fracture energy is primarily governed by [H₂O]<sub>wip</sub>, because of the plasticizing effect of H₂O<sub>wip</sub> that weakens intermolecular forces. Consequently, VAE-based membranes undergo the most pronounced fracture energy decline in all systems, while SBR-based membranes exhibit the lowest decrease in PM and PCC membranes, and SA-PWC shows the least degradation in PWC membranes. Secondary cement hydration occurs in both SA-PWC and VAE-PWC during moisture treatment, but is minimal in SBR-PWC. Secondary hydration, high water-absorptivity of hydration products, osmotic pressure, instability of polymer, and hindered latex film formation, are possible causes for higher moisture uptake of PWC.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"213 ","pages":"Article 109964"},"PeriodicalIF":7.3,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979011","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}
Pub Date : 2026-01-14DOI: 10.1016/j.porgcoat.2026.109967
Zizhao Li , Chijie Guo , Yu Chen , Yao Gu , Ren Liu , Jing Luo
In this work, a facile and rapid one-pot strategy combining photopolymerization with phase separation was developed for the preparation of TiO2@polymer hollow microspheres (TiO2@PHMS), designed as multifunctional fillers for high-performance thermal-insulation coatings. By systematically optimizing the efficiency of photo-initiator and tuning the surface hydrophobicity of TiO2 particles, well-defined hollow microspheres with a robust polymer shell embedded with TiO2 were successfully fabricated at ambient temperature within several minutes. The resulting TiO₂@PHMS endowed the composite coating with a superior thermal insulation capability through a dual mechanism: the hollow core provides a thermal barrier, while the embedded TiO₂ offers strong solar reflection. Under optimal conditions, the coating formulated with TiO2@PHMS exhibited a 74% higher solar reflectance and an almost 50% lower thermal conductivity compared to pure resin coating. This synergistic effect of thermal barrier and solar reflection resulted in a maximum temperature difference (ΔT) of 22.4 °C in a simulated insulation test. This study presents an energy-efficient and scalable method for producing advanced fillers for next-generation energy-saving and durable architectural coatings.
{"title":"One-pot facile synthesis of TiO2 hollow microspheres via photo-polymerization for thermal-insulation coatings","authors":"Zizhao Li , Chijie Guo , Yu Chen , Yao Gu , Ren Liu , Jing Luo","doi":"10.1016/j.porgcoat.2026.109967","DOIUrl":"10.1016/j.porgcoat.2026.109967","url":null,"abstract":"<div><div>In this work, a facile and rapid one-pot strategy combining photopolymerization with phase separation was developed for the preparation of TiO<sub>2</sub>@polymer hollow microspheres (TiO<sub>2</sub>@PHMS), designed as multifunctional fillers for high-performance thermal-insulation coatings. By systematically optimizing the efficiency of photo-initiator and tuning the surface hydrophobicity of TiO<sub>2</sub> particles, well-defined hollow microspheres with a robust polymer shell embedded with TiO<sub>2</sub> <!--> were successfully fabricated at ambient temperature within several minutes. The resulting TiO₂@PHMS endowed the composite coating with a superior thermal insulation capability through a dual mechanism: the hollow core provides a thermal barrier, while the embedded TiO₂ offers strong solar reflection. Under optimal conditions, the coating formulated with TiO<sub>2</sub>@PHMS exhibited a 74% higher solar reflectance and an almost 50% lower thermal conductivity compared to pure resin coating. This synergistic effect of thermal barrier and solar reflection resulted in a maximum temperature difference (ΔT) of 22.4 °C in a simulated insulation test. This study presents an energy-efficient and scalable method for producing advanced fillers for next-generation energy-saving and durable architectural coatings.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"213 ","pages":"Article 109967"},"PeriodicalIF":7.3,"publicationDate":"2026-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979010","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}
Pub Date : 2026-01-14DOI: 10.1016/j.porgcoat.2026.109968
Lei Ma , Liu Liu , Lei Wang , Lu Tang , Chen Wang , Wanxia Huang
The escalating global energy crisis and electromagnetic pollution pose dual threats to sustainability and human health. Developing multifunctional materials for zero-energy cooling and effective EMI shielding is therefore crucial. Herein, based on high-speed shear and ultrasonic dispersion, a stretchable Janus coating film was fabricated via a scalable method combining solvent evaporation and humidity-assisted phase separation. The film integrates passive radiative cooling, electromagnetic interference shielding, Joule heating, self-cleaning, and flame retardancy in a single system. The radiative cooling layer, comprising a thermoplastic polyurethane matrix with BaSO4 micro-nanoparticles and SiO2-HA fillers, forms a multiscale porous structure that leverages Mie scattering, multiple reflection, and phonon-polariton resonance to achieve high solar reflectance (90.46%) and emissivity (95.71%). It also exhibits superhydrophobicity (CA > 150°) and low thermal conductivity. The EMI layer, constructed with a graphene-based dense-porous gradient, resolves the recalcitrant problem of combining high shielding efficiency and excellent mechanical properties with graphene as filler material. It employs an absorption-reflection-absorption mechanism that yields an average shielding effectiveness of 36.07 dB (X-band) and fast electrothermal heating to 93.3 °C at 7 V. A halogen-free phosphorus additive provides self-extinguishing flame retardancy, and the film maintains excellent flexibility (strain 243%). Outdoor tests show an average daytime sub-ambient cooling of 5.5 °C and a theoretical cooling power of 84.27 W/m2. Building energy simulations further demonstrate Janus film's significant cooling energy savings across global climates. With superior mechanical robustness, environmental stability, and adaptive thermal management, this Janus coating film offers strong potential for building energy conservation, wearable electronics, and outdoor applications.
不断升级的全球能源危机和电磁污染对可持续性和人类健康构成双重威胁。因此，开发用于零能量冷却和有效电磁干扰屏蔽的多功能材料至关重要。本文基于高速剪切和超声分散，采用溶剂蒸发和湿度辅助相分离相结合的可扩展方法制备了可拉伸Janus涂层。该薄膜集被动辐射冷却、电磁干扰屏蔽、焦耳加热、自清洁和阻燃于一体。辐射冷却层由热塑性聚氨酯基体与BaSO4微纳米颗粒和SiO2-HA填料组成，形成多尺度多孔结构，利用Mie散射、多次反射和声子极化子共振实现高太阳反射率（90.46%）和发射率（95.71%）。它还具有超疏水性（CA > 150°）和低导热性。采用石墨烯基致密多孔梯度构建的电磁干扰层，解决了以石墨烯为填充材料结合高屏蔽效率和优异力学性能的顽固性问题。它采用吸收-反射-吸收机制，平均屏蔽效率为36.07 dB （x波段），并在7 V下快速电热加热至93.3°C。无卤磷添加剂提供自熄阻燃性，薄膜保持优异的柔韧性（应变243%）。室外测试表明，白天亚环境冷却平均为5.5°C，理论冷却功率为84.27 W/m2。建筑能源模拟进一步证明了Janus薄膜在全球气候下显著的制冷节能效果。凭借卓越的机械稳健性，环境稳定性和自适应热管理，这种Janus涂层薄膜为建筑节能，可穿戴电子产品和户外应用提供了强大的潜力。
{"title":"A stretchable and scalable Janus coating film with a multiscale porous structure integrating passive radiative cooling and electromagnetic shielding","authors":"Lei Ma , Liu Liu , Lei Wang , Lu Tang , Chen Wang , Wanxia Huang","doi":"10.1016/j.porgcoat.2026.109968","DOIUrl":"10.1016/j.porgcoat.2026.109968","url":null,"abstract":"<div><div>The escalating global energy crisis and electromagnetic pollution pose dual threats to sustainability and human health. Developing multifunctional materials for zero-energy cooling and effective EMI shielding is therefore crucial. Herein, based on high-speed shear and ultrasonic dispersion, a stretchable Janus coating film was fabricated via a scalable method combining solvent evaporation and humidity-assisted phase separation. The film integrates passive radiative cooling, electromagnetic interference shielding, Joule heating, self-cleaning, and flame retardancy in a single system. The radiative cooling layer, comprising a thermoplastic polyurethane matrix with BaSO<sub>4</sub> micro-nanoparticles and SiO<sub>2</sub>-HA fillers, forms a multiscale porous structure that leverages Mie scattering, multiple reflection, and phonon-polariton resonance to achieve high solar reflectance (90.46%) and emissivity (95.71%). It also exhibits superhydrophobicity (CA > 150°) and low thermal conductivity. The EMI layer, constructed with a graphene-based dense-porous gradient, resolves the recalcitrant problem of combining high shielding efficiency and excellent mechanical properties with graphene as filler material. It employs an absorption-reflection-absorption mechanism that yields an average shielding effectiveness of 36.07 dB (X-band) and fast electrothermal heating to 93.3 °C at 7 V. A halogen-free phosphorus additive provides self-extinguishing flame retardancy, and the film maintains excellent flexibility (strain 243%). Outdoor tests show an average daytime sub-ambient cooling of 5.5 °C and a theoretical cooling power of 84.27 W/m<sup>2</sup>. Building energy simulations further demonstrate Janus film's significant cooling energy savings across global climates. With superior mechanical robustness, environmental stability, and adaptive thermal management, this Janus coating film offers strong potential for building energy conservation, wearable electronics, and outdoor applications.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"213 ","pages":"Article 109968"},"PeriodicalIF":7.3,"publicationDate":"2026-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145978893","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}
Pub Date : 2026-01-14DOI: 10.1016/j.porgcoat.2026.109957
Maxime Bès , Vincent Lefloch , Paul Kouadio , Mohamed Hanafi , Diakaridja Nikiema , Eric Lacroux , Romain Valentin , Artem Kovalenko
The ability of polyunsaturated vegetable oils to form solid polymer films by oxygen-induced radical polymerization explains their major role as binders in paints and coatings. However, at large film thicknesses, the diffusion of the oxygen in the bulk is limited which induces gradients of composition and surface instabilities in the film. To avoid this effect, in industrial applications the oil is first prepolymerized, or blown, at high temperature. Here we show that millimeter-thick coatings may be produced by oxidative thermal curing of conjugated polyunsaturated free fatty acids without addition of any catalyst. These free fatty acids (FA) are produced by enzymatic hydrolysis of biobased triglycerides (TG) from Ricinodendron heudelotii oils rich in α-eleostearic acid (18:3). While both the crude oil (TG) and the free fatty acids (FA) are transformed into rubbery polyester networks insoluble in organic solvents, the FA samples show much less surface instabilities. Using infrared spectroscopy and differential scanning calorimetry, we reveal the pathway of the network formation in the TG and FA upon polymerization. By rationalizing these results in comparison with dynamic mechanical analysis of FFA polyesters, we suggest the possible network formation mechanism which may explain lower surface instabilities of the FA samples with respect to the TG ones.
{"title":"Oxidative self-polymerization of conjugated biobased free fatty acids produces thick cross-linked polyester films with low surface instabilities","authors":"Maxime Bès , Vincent Lefloch , Paul Kouadio , Mohamed Hanafi , Diakaridja Nikiema , Eric Lacroux , Romain Valentin , Artem Kovalenko","doi":"10.1016/j.porgcoat.2026.109957","DOIUrl":"10.1016/j.porgcoat.2026.109957","url":null,"abstract":"<div><div>The ability of polyunsaturated vegetable oils to form solid polymer films by oxygen-induced radical polymerization explains their major role as binders in paints and coatings. However, at large film thicknesses, the diffusion of the oxygen in the bulk is limited which induces gradients of composition and surface instabilities in the film. To avoid this effect, in industrial applications the oil is first prepolymerized, or blown, at high temperature. Here we show that millimeter-thick coatings may be produced by oxidative thermal curing of conjugated polyunsaturated free fatty acids without addition of any catalyst. These free fatty acids (FA) are produced by enzymatic hydrolysis of biobased triglycerides (TG) from <em>Ricinodendron heudelotii</em> oils rich in α-eleostearic acid (18:3). While both the crude oil (TG) and the free fatty acids (FA) are transformed into rubbery polyester networks insoluble in organic solvents, the FA samples show much less surface instabilities. Using infrared spectroscopy and differential scanning calorimetry, we reveal the pathway of the network formation in the TG and FA upon polymerization. By rationalizing these results in comparison with dynamic mechanical analysis of FFA polyesters, we suggest the possible network formation mechanism which may explain lower surface instabilities of the FA samples with respect to the TG ones.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"213 ","pages":"Article 109957"},"PeriodicalIF":7.3,"publicationDate":"2026-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145978411","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}
Pub Date : 2026-01-13DOI: 10.1016/j.porgcoat.2026.109956
Miao Zhang , Jian Wang , Lincai Peng , Wenhui Yang , Tianbao Zhao , Baoshu Chen , Zhengping Zhao , Ning Dang
The oil and gas industry suffers severe risks from the synergistic damage of CO₂ corrosion and microbiologically influenced corrosion. However, traditional separate application of corrosion inhibitors and biocides faces drawbacks like chemical incompatibility, high costs and environmental pollution. To address this challenge, an eco-friendly ionic liquid, N-benzyl-1-((4,6-diamino-1,3,5-triazin-2-yl) amino)-3-mercapto-1-oxopropan-2-aminium (MC-B), was synthesized from low-cost cysteine and melamine via streamlined processes. MC-B exhibited prominent synergistic corrosion inhibition and antimicrobial performance based on a combination of electrochemical measurements, surface characterizations and molecular simulations. Endowed with abundant amino groups, MC-B presented high adsorption energy on steel surfaces, forming a dense protective film. At an optimal concentration of 25 ppm, it achieved a corrosion inhibition efficiency of up to 97.51% via mixed-type inhibition mechanism, and reduced both sessile and planktonic D. nigrificans cells by over two logarithmic units. This research offers a green, high-efficiency solution for the synergistic prevention and control of oilfield pipeline corrosion and microbial contamination, with considerable potential for industrial application.
{"title":"A novel eco-friendly and bifunctional ionic liquid with superior corrosion and microbial inhibition for L245 steel in CO₂-saturated oilfield environment","authors":"Miao Zhang , Jian Wang , Lincai Peng , Wenhui Yang , Tianbao Zhao , Baoshu Chen , Zhengping Zhao , Ning Dang","doi":"10.1016/j.porgcoat.2026.109956","DOIUrl":"10.1016/j.porgcoat.2026.109956","url":null,"abstract":"<div><div>The oil and gas industry suffers severe risks from the synergistic damage of CO₂ corrosion and microbiologically influenced corrosion. However, traditional separate application of corrosion inhibitors and biocides faces drawbacks like chemical incompatibility, high costs and environmental pollution. To address this challenge, an eco-friendly ionic liquid, N-benzyl-1-((4,6-diamino-1,3,5-triazin-2-yl) amino)-3-mercapto-1-oxopropan-2-aminium (MC-B), was synthesized from low-cost cysteine and melamine via streamlined processes. MC-B exhibited prominent synergistic corrosion inhibition and antimicrobial performance based on a combination of electrochemical measurements, surface characterizations and molecular simulations. Endowed with abundant amino groups, MC-B presented high adsorption energy on steel surfaces, forming a dense protective film. At an optimal concentration of 25 ppm, it achieved a corrosion inhibition efficiency of up to 97.51% via mixed-type inhibition mechanism, and reduced both sessile and planktonic <em>D. nigrificans</em> cells by over two logarithmic units. This research offers a green, high-efficiency solution for the synergistic prevention and control of oilfield pipeline corrosion and microbial contamination, with considerable potential for industrial application.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"213 ","pages":"Article 109956"},"PeriodicalIF":7.3,"publicationDate":"2026-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145978400","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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号