Journal of Coatings Technology and Research最新文献

{"title":"Binder-free conductive graphite coatings on polyimide substrates for applications in flexible electronics","authors":"Gimhani C. Wikaramasinghe,&nbsp;Rangana M. Manamendra,&nbsp;K. R. Jaliya Manuda,&nbsp;Buddini Nissanka,&nbsp;Darshana L. Weerawarne,&nbsp;Dilushan R. Jayasundara","doi":"10.1007/s11998-024-01012-4","DOIUrl":"10.1007/s11998-024-01012-4","url":null,"abstract":"<div><p>The production of graphite/graphene derivative inks, incorporating different solvents, binders, and stabilizers is a focused research area for the development of printed electronic circuits on flexible substrates. Within the scope of the present study, a facile methodology was employed to produce a water-based graphite paste, devoid of binders and stabilizers, serving as a conductive paste while preserving the unique properties of graphite. A superior adhesive graphite thin film, attaining a 5B standard according to the ASTM D3359 crosshatch adhesion test, was successfully developed on a polyimide substrate (PI). This graphite coating on polyimide (Gr/PI) was characterized using mechanical reliability tests and four-probe resistance measurements. The adhesive Gr/PI exhibited an optimal sheet resistance value of 114 ± 12 Ω/sq/mil. The shifts in the FTIR of Gr/PI, compared to the spectrum of PI indicate significant π-π interactions between the graphite and polyimide structure of the flexible substrate, elucidating the mechanism of graphite ink adhesion. The results obtained from ASTM mechanical reliability tests encompassing hardness, crease, and bending tests underscore the viability of employing Gr/PI in the manufacturing of conductive interconnects and electrodes for flexible electronic applications.</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":"825 - 838"},"PeriodicalIF":2.3,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622251","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":"Preparation and properties of waterborne UV-curable epoxy soybean oil acrylate resin","authors":"Rouyan Li,&nbsp;Weineng Lu,&nbsp;Jinqing Qu","doi":"10.1007/s11998-024-01020-4","DOIUrl":"10.1007/s11998-024-01020-4","url":null,"abstract":"<div><p>In order to meet increasingly strict environmental regulations and environmentally friendly paint standards, UV-curable waterborne bio-based coatings with attractive characteristics of environment friendly, low toxicity, high efficiency, energy conservation, and competitive price have become one of the research hotspots. Herein, the epoxy soybean oil-based acrylate (AESO) was modified with cyclic anhydride, neutralized by triethylamine, then dispersed in deionized water to form the high bio-based content waterborne UV-curable resin (WAESO) with good storage stability. The effects of molar ratios of hydroxyl/anhydride and neutralized degree on the WAESO stability were studied. The thermostability and the comprehensive properties of cured films were further investigated. The WAESO synthesized by AESO and succinic anhydride with the OH/RCOOR″ molar ratio of 4:1 was found to display good storage stability over 6 months, its average particle size was 71 nm, and its zeta (<i>ζ</i>) potential was − 87.64 mV. The cured film of the emulsion displayed good thermostability with 232°C of the initial degradation temperature, good flexibility with 1 mm, and excellent solvent resistance over 100 double rubs. The cure films on the wood and PVC sheets exhibited excellent sanding property and high gloss with 108°. The water-based modification of AESO in this work is expected to be applied to wood and plastics paints because of good comprehensive performance, environmental protection, and high bio-based contents.</p></div>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":"22 3","pages":"911 - 925"},"PeriodicalIF":2.3,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143896804","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: 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}