Progress in Organic Coatings最新文献

{"title":"Antimicrobial coating films: Development by adding zinc–melamine complex to polyvinyl alcohol and antimicrobial performance","authors":"","doi":"10.1016/j.porgcoat.2024.108799","DOIUrl":"10.1016/j.porgcoat.2024.108799","url":null,"abstract":"<div><p>A metal–ligand complex is a complex antimicrobial system with a 3D morphology that diversifies its antimicrobial potency. These complexes with diverse geometries can mitigate microbial resistance to biocidal agents. However, the antimicrobial potential of such complexes has not been extensively investigated. In addition, to meet the goals of the 2030 Agenda, the demand for antimicrobial packaging systems prepared from bio-based and/or biodegradable polymers has been increasing. To this end, in this study, a zinc–melamine (MA) complex was introduced into polyvinyl alcohol (PVA) using epichlorohydrin (ECH) as the epoxide crosslinker. PVA was first modified using ECH, allowing interactions between PVA–ECH and MA. Subsequently, zinc ions were introduced into PVA–ECH–MA complex to develop a metal–ligand complex in the PVA matrix and with the solutions created, film samples were obtained with the bar-coating technique. The chemical composition of a film prepared using the metal–ligand complex was assessed through Fourier transform infrared spectroscopy, which indicated the presence of the zinc–MA complex in the PVA film. The thermal properties of the samples were verified through thermogravimetric analysis. The introduction of the complex improved the flexibility, Young's modulus, and fracture resistance of PVA. Specifically, the elongation at break increased from 89.29 ± 6.63 % to 338.67 ± 14.54 %. Additionally, the Young's modulus considerably decreased from 740.40 ± 195.15 to 2.51 ± 0.26 N/mm². Furthermore, the antimicrobial properties of the metal–ligand complex against <em>Staphylococcus aureus</em> (<em>S. aureus</em>) and <em>Escherichia coli</em> (<em>E. coli</em>) were evaluated using the inhibition zone assay. The metal–ligand complex film exhibited a large inhibition zone against both microbes, with a stronger effect against <em>E. coli</em> than <em>S. aureus</em>. Indeed, the inhibition zone for <em>E. coli</em> was around 13/14 ± 1 mm, while the positive control obtained a zone of around 7 ± 0.5 mm. Because of its significant antimicrobial efficacy and enhanced mechanical properties, the as-prepared antimicrobial film can be applied in the production of food packaging materials and coatings for food contact paper.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142162797","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":"Synergistic catalytic effects of combined manganese-based driers on accelerating the drying process of tung oil","authors":"","doi":"10.1016/j.porgcoat.2024.108792","DOIUrl":"10.1016/j.porgcoat.2024.108792","url":null,"abstract":"<div><p>Although manganese-based driers with nitrogen- or oxygen-containing ligands can accelerate the surface drying of tung oil film, their mechanical property performance does not meet industrial requirements. To address this, the drying activities of manganese-based driers with nitrogen- and oxygen-containing ligands on tung oil film were investigated. The curing process of tung oil film catalyzed by the combination driers of Mn(OH)₂(benz)₂·Mn(H₂O)₂(acac)₂, MnCl₂(bipy)₂·Mn(H₂O)₂(acac)₂, and MnCl₂(bipy)₂·Mn(OH)₂(benz)₂ was revealed using Fourier-transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). The results revealed that the combination driers enhanced the drying activities of Mn²⁺ in tung oil due to a synergistic effect between Mn²⁺ and its ligands. This process catalyzed the crosslinking of tung oil, giving the tung oil film a faster drying time, greater scratch resistance, increased hardness, improved flexibility, and greater thermal stability. These materials may replace traditional heavy metal driers to produce tung oil films with outstanding mechanical properties. Additionally, this paper describes the drying mechanism of these manganese-based driers with a combination of nitrogen-containing and oxygen-containing ligands and provides a new tung oil drying method.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142158049","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 corrosion protection with bipolar coatings incorporating modified graphene","authors":"","doi":"10.1016/j.porgcoat.2024.108775","DOIUrl":"10.1016/j.porgcoat.2024.108775","url":null,"abstract":"<div><p>Coating is always one of the most important methods for corrosion protection, to address the problem that the coating does not have the ion-blocking ability, this paper takes modified graphene as the filler and prepares a bipolar coating with an inner layer containing cetyltrimethylammonium bromide (CTAB)-modified graphene that is cation-selective and prevents the penetration of cations such as metal ions, while the outer layer containing sodium dodecylbenzene sulfonate (SDBS)-modified graphene is anion-selective and blocks the entry of anions such as Cl⁻. The 0.01 Hz impedance modulus value of the bipolar coating with graphene addition of 0.6 wt% (Ts0.6) was 5.88 × 10¹⁰ Ω·cm² after 84 days of immersion, with no significant modulus attenuation, and five orders of magnitude elevated the modulus value compared to acrylic urethane coatings commonly used for storage tanks. Ts0.6 can withstand a minimum of 280 °C and has an adhesive strength to the substrate of 11.08 MPa. With the increased amount of graphene, its adhesion decreases, but heat resistance improves.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0300944024005678/pdfft?md5=76dddc411387c47eafa85ac0eb274663&pid=1-s2.0-S0300944024005678-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142162795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Robust superhydrophobic coating for photothermal anti-icing and de-icing via electrostatic powder spraying","authors":"","doi":"10.1016/j.porgcoat.2024.108778","DOIUrl":"10.1016/j.porgcoat.2024.108778","url":null,"abstract":"<div><p>Employing electrostatic powder spraying technology, this research successfully devised an eco-friendly and enduring superhydrophobic coating that showcases exceptional anti-icing and de-icing characteristics without emitting volatile organic compounds (VOCs). Through the integration of polytetrafluoroethylene (PTFE) and silica dioxide (SiO₂) particles into a polyester-based powder coating, followed by thorough mixing with a domestic blender, the resultant powder was uniformly applied to the substrate via electrostatic attraction and subsequently cured to yield a mechanically robust superhydrophobic coating (CA = ~162°, SA = ~2.3°). Remarkably, the coating sustained a contact angle of approximately 150° even after enduring two cycles of water and falling-sand impact tests—equivalent to two years of natural weathering as per ISO/TS 10689 standards—as well as surviving 250 cycles of abrasion or 200 peel tests, underscoring its remarkable durability. The ingenuity of the coating's superhydrophobicity lengthened the freezing duration by 2.8-fold for a 100 μL water droplet at −20 °C. When photothermal attributes were coupled with superhydrophobicity, the freezing delay was further amplified to 3.6 times under an illumination of 0.3 kW/m² and to 4.2 times under 0.6 kW/m². Moreover, the coating slashed the ice melting time by nearly half when tested under simulated sunlight (1 kW/m²) or under the influence of an infrared laser (25 kW/m²), relative to an uncoated aluminum substrate. In comparison to water droplets on aluminum, the ice adhesion force on the coated surface was diminished by 87 %. In summation, this innovative, eco-conscious, and long-lasting superhydrophobic coating, boasting superior anti-icing capabilities, holds immense promise for mass production and extensive application in the realm of outdoor metal protection.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142162796","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":"Self-supporting ultra-thin sandwich-structured ANFs-PVA/AgNWs films with flame-retardant and electromagnetic interference shielding performance","authors":"","doi":"10.1016/j.porgcoat.2024.108801","DOIUrl":"10.1016/j.porgcoat.2024.108801","url":null,"abstract":"<div><p>Due to electronic product miniaturization and acceleration, electromagnetic radiation and thermal accumulation issues are prominent, posing risks to nearby devices and individuals. Developing thin polymer films to block electromagnetic radiation and prevent fires is crucial for smaller, faster electronics. In this study, we successfully fabricated a unique self-supporting ultra-thin sandwich-structured film named ANFs-PVA/AgNWs (APAg), which exhibited exceptional performance in both electromagnetic interference (EMI) shielding and flame retardancy. The introduction of inner AgNWs layer resulted in significant EMI shielding effectiveness (SE) at X-band frequencies, achieving an impressive 47.01 dB with a loading of only 0.10 mg/cm², effectively blocking 99.99 % of electromagnetic waves (EMWs). The ANFs-PVA layers were adopted as the flexible outer layer, endowing the films with excellent flame retardance and good mechanical support due to the high heat resistance of aramid nanofibers (ANFs) as well as the strong hydrogen bonding interaction between ANFs and PVA. The film demonstrated self-extinguishing behavior in vertical burning tests, achieving a flame-retardant rating of V-0. Furthermore, the sandwich structure provides high durability for the EMI shielding performance of the films under different conditions. This study presents a novel approach for fabricating high-performance polymer-based EMI shielding films that hold great potential for applications in electronics and communication technologies.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142158050","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":"A fire-retardant coating for wood made from chitosan itaconate","authors":"","doi":"10.1016/j.porgcoat.2024.108793","DOIUrl":"10.1016/j.porgcoat.2024.108793","url":null,"abstract":"<div><p>Wood is becoming increasingly popular again due to an increased environmental awareness. However, wood generally needs protection from a number of external influences such as moisture, UV, stains, and also fire. The latter is a particular challenge for building materials because once ignited, untreated wood usually burns down completely without the need for a continuous external heat supply. We have recently developed a sustainable coating based on polymerised chitosan itaconate, which protects wood against moisture, UV, and stains. Free-standing chitosan itaconate films were now found to be non-flammable and do not melt when exposed to fire. Thermogravimetric analyses of these films underscore the importance of polymerisation to increase the thermal stability. When applied to wood surfaces, the coating delays the ignition and the spreading of flames. A single application already reduces the burning rate by one third. With multiple layers of the coating, the samples extinguish as soon as the external flame is removed.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S030094402400585X/pdfft?md5=2139bda2fad4c228248e90b433c03fd4&pid=1-s2.0-S030094402400585X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced mechanical and protective properties of silicone epoxy coatings doped with modified boron nitride nanosheets","authors":"","doi":"10.1016/j.porgcoat.2024.108803","DOIUrl":"10.1016/j.porgcoat.2024.108803","url":null,"abstract":"<div><p>While organic coatings effectively prevent metal corrosion, they are prone to micro-porosity and micro-cracking during curing and can be degraded by environmental factors, reducing their protective capacity and the substrate's lifespan. Inspired by the polymer confinement effect, this study synthesizes BNNSs-PDA-TiO₂ nanocomposites to enhance the mechanical and protective properties of silicone epoxy (SE) coatings. FTIR, TGA, XPS, and TEM/EDS analyses confirm the successful growth of TiO₂ on PDA-modified BNNSs. The incorporation of these nanofillers significantly restricts polymer chain mobility, leading to notable improvements in the composite coating's mechanical and protective performance. Compared to pure SE, the tensile strength and Young's modulus of the 1 % BNNSs-PDA-TiO₂/SE composite coating increased by 91 % and 83 %, respectively. Electrochemical impedance spectroscopy (EIS) revealed that, after 6 cycles of accelerated cathodic polarization in 3.5 wt% NaCl solution, the low-frequency impedance modulus and coating resistance of the 1 % BNNSs-PDA-TiO₂/SE composite coating were three orders of magnitude higher than those of pure SE. This enhanced corrosion resistance is attributed to a dual protection mechanism: an improved passive barrier effect (strong interface and restricted polymer chains increased coating density) and the corrosion-inhibiting action of PDA and TiO₂. This study introduces the concept of polymer confinement, offering a new perspective for designing high-performance organic coatings reinforced with 2D nanocomposite fillers.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150436","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 thermal conductivity and anticorrosion capabilities of epoxy composite coating with quercetin-modified boron nitride","authors":"","doi":"10.1016/j.porgcoat.2024.108773","DOIUrl":"10.1016/j.porgcoat.2024.108773","url":null,"abstract":"<div><p>Hexagonal boron nitride (h-BN) as an ideal two-dimensional nanofiller is often utilized to enhance the thermal conductivity and anticorrosion in the polymer matrix composites. However, the poor compatibility and dispersibility severely restrict its further application. To address this issue, herein, a novel h-BN (FBN) filler with excellent compatibility and dispersibility performances was prepared using a bio-based quercetin modifier by a non-covalent modification method. Leveraging the good compatibility between quercetin and epoxy resin (EP), FBN exhibits good dispersion in the EP. Results from thermogravimetric analysis (TG), derivative thermogravimetry (DTG), and differential scanning calorimetry (DSC) analyses prove that the addition of FBN not only significantly improves the thermal conductivity but also evidently enhances the thermal stability of the polymer matrix composite. When the mass ratio of micro-FBN to nano-FBN is 2:1, the optimized FBN/EP composite coating can further enhance the thermal conductivity with 2.385 W m⁻¹ K⁻¹. Additionally, electrochemical impedance spectroscopy (EIS) and neutral salt spray (NSS) analyses demonstrate the superior long-term corrosion protection capability of the FBN composite coating, much better than pure EP and h-BN coatings. This is attributable to that the better dispersion and compatibility of FBN in the composite coating further enhances its barrier effect.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150437","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":"Improved properties of epoxy composite coatings enabled by multi-dimension filler materials","authors":"","doi":"10.1016/j.porgcoat.2024.108800","DOIUrl":"10.1016/j.porgcoat.2024.108800","url":null,"abstract":"<div><p>Nanofillers of various nano dimensions, ranging from 0D (such as SiO₂) to 1D (such as carbon nanotubes) and 2D (such as graphene), are commonly added to epoxy resin matrices to enhance their tribological properties, making them more suitable for various applications such as protective coatings, composites, and adhesives. Beyond solely utilizing single-nano-dimension fillers, 0D/2D multi-dimensional designed materials are more effective fillers for high-performance epoxy coatings due to their rich morphologies and chemistry. In this work, a highly anti-corrosive epoxy-based coating with multi-dimensional fillers of 2D hexagonal boron nitride (h-BN) and 0D mesoporous silica particles (mSi) is prepared and reported. The approach initially involved the sol-gel condensation reaction coating of h-BN sheets with mesoporous silica to obtain hBN@mSi multi-dimensional fillers. This was followed by the introduction of benzotriazole (BTA) as the corrosion inhibitor to hBN@mSi, forming BTA-hBN@mSi, which was later added to the epoxy resin to obtain the composite coating with improved performance. The underlying mechanism for the improved corrosion behavior in the modified epoxy was then explored using various methods. The results show that the increased specific surface area and pore volume of 0D/2D multi-dimensional fillers of hBN@mSi significantly increased in comparison to their single dimensions. This played a critical role in the BTA loading capacity in the filler and hence the anticorrosion performance of the modified epoxy coating. Furthermore, the modified epoxy coating exhibited good thermal conductivity and mechanical properties, making it suitable for various applications where corrosion resistance, thermal conductivity, and mechanical strength are key, such as in the construction of heat exchangers for various industries including chemical processing, oil refining, power generation, and HVAC systems.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0300944024005927/pdfft?md5=33411a9685ee3f7146e7714b701e48b1&pid=1-s2.0-S0300944024005927-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Barrier coatings on dry-formed pulp with lignin, stearic acid, and combinations thereof","authors":"","doi":"10.1016/j.porgcoat.2024.108804","DOIUrl":"10.1016/j.porgcoat.2024.108804","url":null,"abstract":"<div><p>Barrier coatings on dry formed pulp were studied in this article, which were derived from Kraft lignin, stearic acid, and combinations thereof. Coating layers were applied by spray-coating with a solution of lignin or stearoyl chloride and subsequent heat treatment. Alternatively, lignin was esterified with stearoyl chloride on beforehand or combinations of lignin and stearoyl chloride on the air-laid mat were done. Since the treatments were applied prior to thermopressing, the coating agents permeated the top layers of each substrate. As our results show, coatings with lignin could improve the tensile strength and stiffness of the substrate. Grafting with stearic acid, on the other hand, affected the tensile properties negatively, which was argued to arise from worse binding of the cellulose fibers and degradation due to the presence of acid moieties. All treatments improved the barrier properties, as noted by a reduction in air permeation and water-vapor transmission rate (WVTR). The effect of spray coated lignin on WVTR was best, albeit showing less effect on the water absorption as measured by COBB₁₈₀₀. Stearic acid grafting yielded the opposite trend, i.e., reducing water absorption to a greater extent, while affecting WVTR less. Combinations of stearoyl chloride and lignin showed synergies and additive effects to some extent. In conclusion, various treatments for dry formed fibers were implemented and tested, which may promote the development of new barrier solutions for cellulose-based materials.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0300944024005964/pdfft?md5=0b82c5710fc12fd1a79d73ce53364a37&pid=1-s2.0-S0300944024005964-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}