Journal of Coatings Technology and Research最新文献

{"title":"Site-specific weathering of coatings: I. Accelerated protocol for temperate climate in Central Europe and numerical simulations","authors":"Matthias Wanner,&nbsp;Harald Oehler,&nbsp;Alexander Neumann,&nbsp;Dirk Lellinger,&nbsp;Ingo Alig","doi":"10.1007/s11998-024-01007-1","DOIUrl":"10.1007/s11998-024-01007-1","url":null,"abstract":"<div><p>Inspired by an improved accelerated weathering protocol to anticipate Florida exposure behavior of coatings, designated as new protocol (NP),¹ which is implemented in the ASTM D7869-13 standard, a weathering protocol is proposed to replicate the exposure in the temperate climate in Stuttgart (Germany). This protocol, designated as ZykStuttgart, has been developed by adapting the steps proposed by the NP to the climate in Stuttgart. Therefore, weather data from Homestead (Florida/USA) and Stuttgart has been analyzed and compared. Numerical simulations of water uptake and hygro-thermal stresses for model coatings were performed for varying cycle designs and using time-resolved outdoor weather data to support protocol development.</p></div>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":"22 2","pages":"773 - 790"},"PeriodicalIF":2.3,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11998-024-01007-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Development of EPDM-based polymer nanocomposite barrier coating for radioactive waste storage containers","authors":"Nikhita Khurana,&nbsp;Sunita Rattan,&nbsp;Pinklesh Arora,&nbsp;Avinash Pente,&nbsp;Saurabh Saxena","doi":"10.1007/s11998-024-01022-2","DOIUrl":"10.1007/s11998-024-01022-2","url":null,"abstract":"<div><p>This research focused on developing a protective coating with improved radiation and corrosion resistance properties for nuclear waste disposal containers. The coating was developed by using radiation-resistant polymeric binder, ethylene propylene diene monomer as the base matrix, zinc oxide nanoparticles, and other reagents. Rheological parameters of coating formulations were analyzed to ensure that it could be applied by spray technique. Prepared coating formulations were applied on mild steel panels, and corrosion studies were performed in a salt spray chamber. To study the effect of gamma radiation on coating formulations, coated mild steel panels were irradiated at different radiation doses (up to 1800 kGy) using cobalt-60 as a radiation source. The dose and intensity of the radiation source were estimated based on the life of the waste package containing major radionuclide, such as Cs-137 and Sr-90, for simulating the disposal environment. The characterization of the coated panels was carried out before and after radiation exposure for dry film thickness, adhesion, and mechanical properties such as cross-cut adhesion, scratch hardness, pull off strength, tensile strength, and elongation. Thermogravimetric analysis, Fourier transform infrared spectroscopy, and scanning electron microscopy were also studied to see the effective changes in the coating after radiation exposure. The results showed that the high dose of radiation affecting the coating was in the marginal range, and it could withstand a radioactive as well as corrosive environment. The developed coating was found suitable to use for radioactive waste storage containers for long-term storage of low-level radiation waste.</p></div>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":"22 3","pages":"941 - 950"},"PeriodicalIF":2.3,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143896658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Site-specific weathering of coatings: II. Comparison of natural weathering and accelerated protocols for Central Europe and Florida","authors":"Harald Oehler,&nbsp;Matthias Wanner,&nbsp;Lukas Aktas,&nbsp;Marie Neumann,&nbsp;Dirk Lellinger,&nbsp;Ingo Alig","doi":"10.1007/s11998-024-01005-3","DOIUrl":"10.1007/s11998-024-01005-3","url":null,"abstract":"<div><p>Weathering protocols, which anticipate exposure behavior of coatings in the temperate climate in Central Europe (ZykStuttgart: ZS) and Florida (new protocol: NP), were applied for accelerated testing of melamine-, silicone resin/acrylate dispersion-, and polyurethane-based coating systems and compared to natural weathering at related sites in Stuttgart (Germany) and near Homestead (Florida/USA), respectively. Color parameters and infrared spectra were measured after defined exposure times and normalized to the irradiation doses. Color changes of an industrial standard with an orange pigment (ORWET) were found to depend for both artificial and natural weathering tests predominantly on irradiation dose. This confirms that the spectral power distribution of the lamp/filter configuration proposed in NP matches sufficiently well to both the sunlight spectra in Florida and Stuttgart. For a melamine-based standard crack coat, crack initiation was found only for NP and the late stage of ZS. For all coating systems studied, characteristic band intensities of infrared spectra and/or color parameters for the two protocols and from natural weathering at the related outdoor sites were shifted along the time axis to merge to master plots. To differentiate between thermally activated, photo-initiated, and hydrolytic degradation, the shift factors were plotted versus inverse annual- or cycle-averaged temperatures including irradiation ratios and averaged humidity ratios. Despite the different reaction mechanism for the acrylic component in the silicone resin/acrylate and the polyurethane coating, a dominance of thermally activated degradation was evident for both. The melamine-based binder showed coupled degradation mechanisms (photo-induced and thermally activated complimented by moisture effects). The use of irradiation doses, cycle-, and annual-averaged temperatures together with cycle- and annual-averaged humidities for data analysis provided simple possibilities for comparison of protocols and weathering sites and a rough differentiation between degradation mechanisms.</p></div>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":"22 2","pages":"739 - 761"},"PeriodicalIF":2.3,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11998-024-01005-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 performance of hybrid polyurethane thin coatings: synthesis and characterization via sol–gel method using TEOS and VTMS","authors":"Nikhil Jagtap,&nbsp;Siddhesh Mestry,&nbsp;Jyoti Darsan Mohanty,&nbsp;S. T. Mhaske","doi":"10.1007/s11998-024-01021-3","DOIUrl":"10.1007/s11998-024-01021-3","url":null,"abstract":"<div><p>Hybrid polyurethane thin coatings have gained significant attention in the surface coatings domain due to their superior mechanical, thermal, and chemical attributes. In this study, a hybrid coating was developed by integrating an organic component (acrylate-terminated PU) with an inorganic component (tetraethyl orthosilicate-vinyltrimethoxysilane) (TEOS-VTMS sol), resulting in an inorganic-organic hybrid system that was subsequently applied to a mild steel panel using a dip-coating technique. The organic component was synthesized by reacting polyester polyol, which was produced from 1,6-hexanediol and adipic acid, with IPDI (isophorone diisocyanate), and then terminating the resulting prepolymer with HEMA (2-hydroxyethyl methacrylate). The inorganic component was prepared by reacting TEOS and VTMS in the presence of ethanol and acetic acid. The hybrid coating was then formed by reacting the TEOS-VTMS sol with the acrylate-terminated PU using benzoyl peroxide as a catalyst. Characterization of the polyester-based polyol and the acrylate-terminated PU was conducted using FTIR, DSC, and TGA. The hybrid coating system’s properties, including contact angle, chemical resistance, corrosion resistance, and mechanical properties, were thoroughly evaluated. Among the three hybrids tested (VTMS-PUA 1, VTMS-PUA 2, and VTMS-PUA 3), VTMS-PUA 3 demonstrated the highest corrosion resistance, exceptional hardness, flexibility, and chemical resistance, outperforming the other two hybrids.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":"22 3","pages":"927 - 939"},"PeriodicalIF":2.3,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143896705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Detection of production relevant deviations in paint sprays","authors":"Oliver Tiedje,&nbsp;Stephan Paustian,&nbsp;Simon Rosenkranz,&nbsp;Meiko Hecker,&nbsp;Cameron Tropea","doi":"10.1007/s11998-024-01015-1","DOIUrl":"10.1007/s11998-024-01015-1","url":null,"abstract":"<div><p>Spray painting is still a poorly manageable process due to the complex interaction of physical, chemical and environmental influences like turbulent air flows, strong electrostatic fields, complex viscosity of paints and paint booth conditions. Consequently, many important properties of the painted film, like thickness, color, surface structure and the efficiency of the process are not controllable in an adequate manner, despite the enormous economic ramifications of poor quality control in high volume applications, such as in the automotive industry. This study shows how novel, online spray monitoring can instantaneously generate characterizing quantities from the spray to detect harmful deviations in the process. In this study, several minute changes have been experimentally imposed on a paint system, such as changed paint viscosity or pigmentation, deviations in air flow and paint flow rates, and defective or used and worn equipment parts. It will be shown that all these deviations lead to features which allow a clear distinction from the intact and reference cases. Additionally, it is shown that most of the deviations, if not detected, would have led to quality issues of the paint coating.</p></div>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":"22 3","pages":"877 - 884"},"PeriodicalIF":2.3,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11998-024-01015-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143896801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Advances in the preparation of water-based inks based on chemical modification of rosin","authors":"Zhengquan Zhang,&nbsp;Qiujing Wang,&nbsp;Zhiming Zhang,&nbsp;Mingsheng Li,&nbsp;Yunfei He,&nbsp;Shaoyun Shan","doi":"10.1007/s11998-024-01004-4","DOIUrl":"10.1007/s11998-024-01004-4","url":null,"abstract":"<div><p>Modified rosin resin is a widely used binder material for water-based inks, offering several benefits such as low volatile organic compound (VOC) emissions, easy cleaning, and recyclability. This review outlines the methods for preparing water-based inks using chemically modified rosin resin and highlights their excellent properties. Given the current challenges in the practical application of water-based inks, various methods are employed to enhance their adhesion, weather resistance, tensile strength, printability, and gloss. The detailed exploration of deriving water-based inks from rosin through esterification and the Diels–Alder reaction is thoroughly examined in this study. It explores the mechanisms, materials, ratios, and process conditions crucial to this preparation. By optimizing these processes, the aim is to enhance rosin utilization and propose innovative approaches for crafting high-performance water-based inks.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":"22 2","pages":"511 - 525"},"PeriodicalIF":2.3,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143621817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Feasible estimation of weathering stability for free film acrylic coatings via dynamic mechanical analysis as the sole characterization method","authors":"Felix Steinberger,&nbsp;Dominik Hense,&nbsp;Albert Rössler,&nbsp;Oliver I. Strube","doi":"10.1007/s11998-024-01013-3","DOIUrl":"10.1007/s11998-024-01013-3","url":null,"abstract":"<div><p>Weathering stability is a highly relevant materials property, especially for exterior coatings. Assessment of artificially or naturally weathered coatings is however still mostly subjective without distinct correlation between the formulation of a coating and its weathering stability. An aggravating issue in the industrial context is the often very sparse information on the exact chemical composition of materials by the manufacturers. In this study, a quantitative method to examine weathering-induced changes in coatings with limited chemical information is described, which is based solely on dynamic mechanical analysis (DMA). This approach is applied to free films to eliminate possible influences of the substrate during the measurement. The effects of artificial weathering on three exemplary acrylic waterborne wood coatings are then examined and compared to the results of state of the art artificial weathering. Precisely, the impact of additional light stabilizer on mechanical properties, molecular weight, and <i>T</i>_g is monitored. For the exemplary systems, it could be shown that the molecular weight of the polymers decreases during artificial weathering, where the most prominent decrease was observed in the first 300 h. In the same time frame, <i>E</i>′ and <i>E</i>″ also decrease, while the glass transition temperature increased dependent of the formulation by 6–15°C. Remarkably, for coatings without light stabilizer an apparent two-staged degradation mechanism is observed, which leads to an increase of <i>E</i>′ and <i>E</i>″ after 600 h of artificial weathering, accompanied with an increased brittleness of the free film. The primary goal of this approach is to offer a tool for quick and systematic investigation of new coating formulations in the industrial context.</p></div>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":"22 2","pages":"839 - 848"},"PeriodicalIF":2.3,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11998-024-01013-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Icephobic and antisoiling performance of PDMS coating filling with inert silicon oil after prolonged outdoor exposure","authors":"Tu Shuhua,&nbsp;Zheng Qinwen,&nbsp;Zhang Jing,&nbsp;Feng Jie","doi":"10.1007/s11998-024-01009-z","DOIUrl":"10.1007/s11998-024-01009-z","url":null,"abstract":"<div><p>Recently, much attention has been paid to the icephobic property of slippery lubricant-infused surfaces, but little attention has been paid to their antisoiling property. In this work, we prepared polydimethylsiloxane (PDMS) coatings by using methyltriacetoxysilane (TM-003) as a crosslinking agent and filling with a certain amount of inert silicone oil. We systematically studied the icephobic and antisoiling performances of these PDMS coatings by placing them outdoors for 1–2 months. Ice-adhesion strength test confirmed that the coating surface filled with inert silicone oil was more icephobic and had a better icephobic effect as the amount of inert silicone oil increased. EDS mapping confirmed that after outdoor exposure for 1–2 months, a small amount of dust deposited on the coating surface, which could be removed mostly by water rinsing and wind. The ice-adhesion strengths of the coating surface increased with the time of outdoor exposure increasing but decreased after several cycles of icing/deicing and finally stabilized at a certain level. XPS characterization confirmed that a small amount of dust was embedded in the coating surface. This work firstly confirmed that if the air was not clear, dust particles in the air would adhere to the coating and the icephobic properties of the coating would deteriorate irreversibly to some extent.</p></div>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":"22 2","pages":"791 - 802"},"PeriodicalIF":2.3,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on a new prospective coating for improving corrosion resistance of magnesium alloy stents with deformation","authors":"Dexiao Liu,&nbsp;Jing Ma,&nbsp;Hui Yang,&nbsp;Ke Yang,&nbsp;Shanshan Chen","doi":"10.1007/s11998-024-01017-z","DOIUrl":"10.1007/s11998-024-01017-z","url":null,"abstract":"<div><p>Biodegradable magnesium alloy vascular stents need to undergo complex deformation (crimping and expanding) in the body during implantation, which puts forward higher requirements for the protective coating material on stents. In this study, a drug-carrying polymer with larger elongation at break, poly(D,L-lactide-co-ε-caprolactone) (PLCL), was used as a new protective coating for AZ31 magnesium alloy stents to improve the corrosion resistance of the stents with deformations. PLCL coating was prepared on the surface of HF-treated AZ31 block samples by dip coating method to study the corrosion resistance of the alloy without deformation, while the conventional poly(D,L-lactide) (PDLLA) was used as a control. Through electrochemical and immersion tests, it was found that AZ31 samples with PLCL coating exhibited superior corrosion resistance. AZ31 stents with two different coatings prepared by ultrasonic spraying were crimped, expanded and immersed. The surface morphology and degradation behavior of the stents after the above deformation showed that the PLCL coating presented better mechanical adaptability to the stents with deformation, with reduced degradation rate, and especially, the pitting corrosion was inhibited. Meanwhile, the PLCL coating endowed great biocompatibility, which can be a promising protective coating for biodegradable magnesium alloy stents.</p></div>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":"22 3","pages":"885 - 900"},"PeriodicalIF":2.3,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143896802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design and synthesis of UV-cured calixarene polyurethane coatings: balancing robust mechanical properties with high self-healing efficiency","authors":"Chen Wang,&nbsp;Fei Gao,&nbsp;Sikan Peng,&nbsp;Jingcheng Liu","doi":"10.1007/s11998-024-01010-6","DOIUrl":"10.1007/s11998-024-01010-6","url":null,"abstract":"<div><p>In this study, we present the design and synthesis of a calixarene polyurethane coating, which exhibits a novel structure comprising a rigid core and flexible arms. This unique configuration enables the coating to possess both high pencil hardness while retaining efficient self-healing capabilities. The synthesis process began with the preparation of a polyurethane (PU) prepolymer (PCDL-PU), using polycarbonate diol (Mn = 500 g/mol, PCDL500) and isoflurone diisocyanate (IPDI). This prepolymer was subsequently reacted with coumarin (CM) and varying quantities of tetra-c-methylcalix[4]resorcinarene (C-4-R), yielding a series of UV-cured self-healing calixarene polyurethane compounds (PCDL-PU-CM)-(C-4-R). The molecular structure of these compounds was characterized using nuclear magnetic resonance (1 H NMR) and Fourier transform infrared spectroscopy (FTIR). A range of UV-cured self-healing polyurethane coatings were formulated using (PCDL-PU-CM)-(C-4-R), and their properties were systematically investigated. The study focused on analyzing the impact of different grafting ratios on the coatings’ properties. The findings reveal that these coatings maintain excellent self-healing abilities up to 99% efficiency, and demonstrate a significant improvement in mechanical properties. Notably, the pendulum hardness of these coatings consistently exceeded 172, while maintaining a pencil hardness of 3H.</p></div>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":"22 2","pages":"803 - 813"},"PeriodicalIF":2.3,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}