{"title":"Role of the encapsulation strategy of smart containers on corrosion resistance and self-healing performance of micro-arc oxidation coating","authors":"Yuezhong Zhang, Xiaoting Chen, Yunfei Qiao, Xiaofeng Ding, Shaohua Zhang, Baosheng Liu","doi":"10.1007/s11998-024-00981-w","DOIUrl":"10.1007/s11998-024-00981-w","url":null,"abstract":"<div><p>Encapsulating smart nano-containers loaded with corrosion inhibitors into coating is a promising approach to functionalize micro-arc oxidation (MAO) coating. The encapsulation strategy of smart containers has a great influence on the microstructure, corrosion resistance and self-healing performance of the smart MAO coating. In order to provide a comprehensive understanding, two kinds of MAO coating encapsulated smart containers (HNT-8HQ), MAO-HNT-8HQ (1S) coating (one-step preparation in an MAO electrolyte containing smart nano-containers) and MAO + HNT-8HQ (2S) coating (pre-prepared MAO coating through an embedding nano-container processing) were prepared on AZ31 magnesium alloy. The incorporated HNT-8HQ in electrolyte can effectively reduce coating porosity and increase coating thickness. Both smart MAO coatings show considerable improvements in the corrosion resistance and a certain self-healing capacity. The post-embedding treated coating (MAO + HNT-8HQ (2S)) has better long-term durability and self-healing performance than one-step preparation coating (MAO-HNT-8HQ (1S)). The low-frequency impedance modulus (|Z|<sub>ƒ=0.01 Hz</sub>) of MAO + HNT-8HQ (2S) coating is 1.33 times that of MAO-HNT-8HQ (1S) coating after immersion in 3.5 wt% NaCl solution for 168 h. The MAO + HNT-8HQ (2S) coating has higher impedance values than MAO-HNT-8HQ (1S) coating during the entire self-healing process. The low-frequency impedance modulus of scratched MAO + HNT-8HQ (2S) coating is 3.33 times that of scratch MAO-HNT-8HQ (1S) coating after a 72 h self-healing process.</p></div>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":"22 1","pages":"351 - 367"},"PeriodicalIF":2.3,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185716","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":"Antibacterial and antiviral activities of transparent PVA coating films prepared by using solutions containing eluted ions from rare earth iodates","authors":"Kazuya Abe, Kayano Sunada, Yasuhide Mochizuki, Toshihiro Isobe, Takeshi Nagai, Hitoshi Ishiguro, Akira Nakajima","doi":"10.1007/s11998-024-00979-4","DOIUrl":"10.1007/s11998-024-00979-4","url":null,"abstract":"<div><p>After powders of three rare earth iodates (Ce(IO<sub>3</sub>)<sub>4</sub>, Ce(IO<sub>3</sub>)<sub>3</sub>, δ-La(IO<sub>3</sub>)<sub>3</sub>) were dispersed in water, the constituent ions were eluted. After filtration, polyvinyl alcohol was dissolved in the filtrated solution. Then the solution was flow-coated to form coating films on glass substrates. The obtained coating films exhibited high transmittance in the visible wavelength range. IO<sub>3</sub><sup>−</sup> was confirmed from the IR spectra measured using the ATR method. Fine precipitates were observed in the coating. The amount was greater on the surface than inside. The coating films prepared from Ce(IO<sub>3</sub>)<sub>3</sub> and δ-La(IO<sub>3</sub>)<sub>3</sub> possessed high antibacterial and antiviral activities against <i>Escherichia coli</i>, <i>Staphylococcus aureus</i>, bacteriophage Qβ, and bacteriophage Φ6 in the dark. Moreover, they inactivated viruses adsorbed from the gas phase.</p></div>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":"22 1","pages":"471 - 480"},"PeriodicalIF":2.3,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11998-024-00979-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185758","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}
Priya Angadiyavar, Rakshitha K. Jain, Dhanya Sunil, M. M. Apoorva, Poornima Bhagavath
{"title":"Blue light excitable fluorescent green security ink for anticounterfeit application","authors":"Priya Angadiyavar, Rakshitha K. Jain, Dhanya Sunil, M. M. Apoorva, Poornima Bhagavath","doi":"10.1007/s11998-024-00975-8","DOIUrl":"10.1007/s11998-024-00975-8","url":null,"abstract":"<div><p>Fluorescent security printing inks on flexible substrates is an arena that demands consistent developments to prevent the ever increasing menace of document/product counterfeiting. Visible light is a much more accessible and safer excitation source than the commonly used ultraviolet (UV) light. In this context, a simple Schiff base 4-pyridyl-benzylidene 2,4-difluoro aniline (PBDFA) is synthesized as a colorant with significant solid-state fluorescence for preparing security ink formulation. A huge challenge lies in preparing a security ink that does not fluoresce under UV light but produces a green fluorescence when irradiated with a blue light source. Such prints would be hard to forge as compared to the existing UV luminescent security inks. The screen prints obtained on a UV dull paper substrate using the solvent-based PBDFA ink revealed good blue light excitable green fluorescence, photostability, and colorimetric, densitometric, and rub resistance characteristics.</p></div>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":"21 6","pages":"2195 - 2200"},"PeriodicalIF":2.3,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11998-024-00975-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185723","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":"Graphene oxide and cuprous oxide/hydrogel modified epoxy coating for marine antifouling","authors":"Fangyuan Ding, Min Wang, Lili Xue","doi":"10.1007/s11998-024-00926-3","DOIUrl":"10.1007/s11998-024-00926-3","url":null,"abstract":"<div><p>Marine biofouling has detrimental effects on the performance and service life of ships and drilling platforms, leading to increased fuel consumption, corrosion of structural surfaces, and significant financial losses. To address these challenges, we developed epoxy coatings that incorporate graphene oxide (GO) and release copper ions (Cu<span>(^{2+})</span>). We carried out microalgae adhesion studies and marine bacterial adhesion experiments on the various composite coatings to examine the antifouling performance of the composite coatings. Additionally, we investigated the underlying mechanisms responsible for the effects of GO and Cu<span>(^{2+})</span>. The results demonstrated the superior anti-adhesion properties of GO. The amount of microalgae adhering to the GO modified epoxy coating was only 13% of that adhering to the epoxy resin coating. Moreover, no microalgae adhesion was observed in the microalgae adhesion assay for the GO/Cu<span>(_{2})</span>O hydrogel modified epoxy composite coating (GCHMC). Additionally, we observed a sustained release of Cu<span>(^{2+})</span> from the GCHMC for over 100 days, as indicated by the Cu<span>(^{2+})</span> release trend. Therefore, the GCHMC effectively showcased its long-lasting marine antifouling properties.</p></div>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":"21 6","pages":"1955 - 1963"},"PeriodicalIF":2.3,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185718","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}
Zhenyu Rui, Xiumei Feng, Liben Zhou, Zhixun Shen, Lu Wan, Zhaolei Li
{"title":"A self-healing epoxy coating realized by 2-chloromethylbenzimidazole loading MIL-88","authors":"Zhenyu Rui, Xiumei Feng, Liben Zhou, Zhixun Shen, Lu Wan, Zhaolei Li","doi":"10.1007/s11998-024-00977-6","DOIUrl":"10.1007/s11998-024-00977-6","url":null,"abstract":"<div><p>Using nanocontainers filled with corrosion inhibitors is an efficient strategy to create a high-performance coating that protects metals from corrosion. In this paper, Metal organic framework (MIL-88) was synthesized and loaded with a sustainable and eco-friendly corrosion inhibitor, 2-chloromethylbenzimidazole (2-CBI). The 2-CBI@MIL-88 was used as a nanofiller to prepare an epoxy resin composite coating. The results showed that the corrosion inhibitors in 2-CBI@MIL-88 were released sustainably in an acidic 3.5 wt% NaCl solution. Notably, the |Z|<sub>0.01 Hz</sub> of the intact EP + 1% 2-CBI@MIL-88 was significantly higher than that of EP, while the |Z|<sub>0.01 Hz</sub> of scratched EP + 1% 2-CBI@MIL-88 increases upon immersion in a 3.5 wt% NaCl solution, demonstrating the excellent self-healing ability. Overall, incorporating 2-CBI@MIL-88 into epoxy coatings offers a promising approach for enhancing the corrosion resistance of steel structures.</p></div>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":"22 1","pages":"309 - 320"},"PeriodicalIF":2.3,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185717","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":"Synergistic effects of zinc oxide and iron oxide photoinitiators for whole spectrum utilization of UV–Vis light in photo-curable coatings","authors":"Qin Lu, Daiyong Ye","doi":"10.1007/s11998-024-00978-5","DOIUrl":"10.1007/s11998-024-00978-5","url":null,"abstract":"<div><p>In order to fully utilize the whole spectrum of UV–Vis light and eliminate the problems of organic photoinitiators in the photo-curable coatings, inorganic composited photoinitiators of ZnO and Fe<sub>2</sub>O<sub>3</sub> nanoparticles (NPs) were prepared and added into the photo-curable waterborne polyurethane acrylates. The inorganic composited photoinitiators utilized both the ultraviolet and visible light, which easily extended the light absorption range of each photoinitiator of ZnO and Fe<sub>2</sub>O<sub>3</sub> NPs. Fourier transform infrared spectroscopy, scanning electron microscopy, and ultraviolet–visible spectrophotometer were used to characterize the chemically composited particles, physically mixed particles, and their photo-curable coatings. Comparison with the pure waterborne polyurethane acrylates, better photoinitiation effect, light conversions, and mechanical properties of the photo-cured films were obtained when the chemically composited photoinitiators of ZnO and Fe<sub>2</sub>O<sub>3</sub> NPs were added with a molar ratio of 1:1. The photo-curing kinetics characterized by the UV–Vis and FTIR spectroscopy also proved their improved synergistic photoinitiation effects. This study demonstrated that the chemically composited photoinitiators of ZnO and Fe<sub>2</sub>O<sub>3</sub> NPs were a prospective solution to the complete utilization of illumination light during the conventional photo-curing processes.</p></div>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":"22 1","pages":"321 - 335"},"PeriodicalIF":2.3,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185719","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}
Chinh Thuy Nguyen, Lien Thi Ngoc Ly, Thai Xuan Nguyen, Hung Phi Dao, Son Anh Nguyen, Trung Huu Tran, Trung Quoc Vu, Quyen Thi Cam Ngo, Tan Ngoc Nguyen, Hoang Thai
{"title":"The effect of organotitanate-modified zinc oxide nanoparticles on some characteristics and anticorrosion protection properties of epoxy coating","authors":"Chinh Thuy Nguyen, Lien Thi Ngoc Ly, Thai Xuan Nguyen, Hung Phi Dao, Son Anh Nguyen, Trung Huu Tran, Trung Quoc Vu, Quyen Thi Cam Ngo, Tan Ngoc Nguyen, Hoang Thai","doi":"10.1007/s11998-024-00971-y","DOIUrl":"10.1007/s11998-024-00971-y","url":null,"abstract":"<div><p>Surface modification of metal oxide nanoparticles can enhance their dispersibility in polymer matrix. In this study, the zinc oxide (ZnO) nanoparticles (NPs) were organically modified by coupling agent as isopropyl tri (dioctyl phosphate) titanate (KR-12) with the initial content of 3 wt.% (in comparison with ZnO NPs weight). The characteristics of modified ZnO (m-ZnO) NPs, namely chemical changes, zeta potential, morphology, and thermal behavior, were evaluated using IR spectroscopy, DLS, SEM, and TGA methods, respectively. The obtained results suggested that ZnO NPs were modified successfully with KR-12 coupling agent. In comparison with the unmodified ZnO (u-ZnO) NPs, the m-ZnO NPs had additional functional groups and there were changes of some properties such as hydrophobic property, surface charge, and thermal stability of m-ZnO NPs. The m-ZnO NPs could disperse in epoxy resin better than the u-ZnO NPs. Therefore, the m-ZnO NPs improved the mechanical properties, chemical resistance, thermal stability, and anticorrosion protection ability of epoxy resin coating. The abrasion resistance and the adhesion of epoxy coating containing 2 wt.% m-ZnO NPs were increased about 40% and 54%, respectively. The bending resistance of epoxy resin was also enhanced, and the anticorrosion resistance of coatings was improved in the presence of m-ZnO nanoparticles.</p></div>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":"22 1","pages":"255 - 268"},"PeriodicalIF":2.3,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185721","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":"Bio-based interior UV-curable coating designed for wood substrates","authors":"Shubham Potdar, Saptarshi Maiti, Aniket Ukirade, Ramanand Jagtap","doi":"10.1007/s11998-024-00970-z","DOIUrl":"10.1007/s11998-024-00970-z","url":null,"abstract":"<div><p>The advancement of UV-curable coatings derived from renewable resources is of paramount importance in achieving sustainability goals for safeguarding the environment. This study aims to synthesize novel UV-curable reactive diluent by reacting bio-based adipic acid with diethanolamine, followed by functionalizing it with glycidyl methacrylate. UV-curable bio-based oligomer was prepared by a ring-opening reaction of epoxidized castor oil with acrylic acid. The chemical structures of the resulting reactive diluent and oligomer were confirmed using analytical techniques such as end-group analysis, FTIR, and 1H NMR. A series of bio-based UV-curable formulations were prepared by combining synthesized reactive diluent with the oligomer and applied on wooden substrates. The effect of incorporating different concentrations of synthesized reactive diluent ranging from 10 to 40 wt.% on the viscosity of the synthesized oligomers was investigated by studying their rheological behavior. The UV-cured coatings were further evaluated for their extent of curing, bio-content, acid, alkali, and boiling water resistance. Thermal properties of films were further characterized for TGA and DSC. Cured coating with 40 wt.% reactive diluent exhibited 86 gloss at 60°, 5H hardness, 5B adhesion, 81.27 °C glass transition temperature, and maximum thermal decomposition temperature of 454 °C. The cured coatings have shown impressive stain resistance properties.</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 1","pages":"239 - 254"},"PeriodicalIF":2.3,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185720","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}
Isabelle C. Zavecz, Caio A. Palma, Maria A. S. Yokomichi, Diego C. F. Moreira, Maurício P. Oliveira
{"title":"Enhancing the colloidal stability of carboxylated styrene-acrylic latexes using anionic and nonionic polymerizable surfactants for architectural paints","authors":"Isabelle C. Zavecz, Caio A. Palma, Maria A. S. Yokomichi, Diego C. F. Moreira, Maurício P. Oliveira","doi":"10.1007/s11998-024-00956-x","DOIUrl":"10.1007/s11998-024-00956-x","url":null,"abstract":"<div><p>To overcome the main challenge of low colloidal stability of poly(styrene-<i>co</i>-butyl acrylate-<i>co</i>-acrylic acid-<i>co</i>-acrylamide) latexes in the presence of polymerizable surfactants, this study aimed to obtain latexes with superior properties and coagulum-free through semibatch emulsion polymerization using anionic and nonionic polymerizable surfactants (Maxemul<sup>TM</sup> 5010 and Maxemul<sup>TM</sup> 6106) mixed with a conventional anionic surfactant (Dowfax<sup>TM</sup> 2A1). The effect of the surfactant amount and type on the colloidal stability, particle size, electrolyte stability, water absorption of the polymer films, and wet scrub resistance of the paint films were investigated. The water absorption of polymer films containing a blend of polymerizable and conventional surfactants was compared to that of films containing conventional surfactants. The results showed that the molar mass has a significant impact on latex stability during the early stages of polymerization. By incorporating a chain transfer agent (<i>n-</i>dodecyl mercaptan, DDM) within the range of 0.05-0.2 wt% loaded in the reactor charge based on the total formulation, coagulum-free latexes were obtained. When polymerizable surfactants were used together with a conventional surfactant and DDM, stable latexes with particle sizes ranging from 96.5 to 110.0 nm, enhanced film properties, and better scrub resistance of the paint films were obtained. The increase in polymerizable surfactant improves the electrolyte stability of the latexes but increases the water absorption of the polymer films. The use of polymerizable surfactant helps to reduce the total amount of surfactant used in the latex formulation. The results achieved in this study create a new approach for the synthesis of poly(St/BA/AA/AM) latexes using polymerizable surfactants for highly pigmented architectural paints.</p></div>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":"21 6","pages":"2079 - 2092"},"PeriodicalIF":2.3,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185777","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}
Lea Senneka, Markus Haag, Katharina N. Aigner, Thomas Gries, Oliver I. Strube
{"title":"Investigation of thermolabile particles for debonding on demand in fiber reinforced composites","authors":"Lea Senneka, Markus Haag, Katharina N. Aigner, Thomas Gries, Oliver I. Strube","doi":"10.1007/s11998-024-00941-4","DOIUrl":"10.1007/s11998-024-00941-4","url":null,"abstract":"<div><p>Glass fiber reinforced plastics (GFRP) are essential for lightweight design and are manufactured in high quantities. Since there is no suitable method for recycling, the GFRP are mostly grinded and used as filler at end of life. In this work, the well-known principle of debonding on demand is considered to enable feasible and value-retaining separation of glass fibers from the polymeric matrix. To this end, gas-releasing thermo-responsive substances (TRS) like carboxylic or amino acids are introduced to the composite to investigate their potential for causing delamination after heating. To promote sufficient fiber/matrix adhesion, the TRS are encapsulated with silica or immobilized on magnetite particles. Furthermore, the immobilization synthesis is scaled up by using a custom-made continuous flow reactor. Finally, a new sizing mixed for glass fiber spinning, containing the particles, is formulated. The experiments reveal that a maximum of 0.5 wt.% particles can be used in the sizing to coat the fibers. Although all tested samples show a significant organic functionalization, the particles functionalized with TRS do not trigger sufficient delamination at the current state of development.</p></div>","PeriodicalId":619,"journal":{"name":"Journal of Coatings Technology and Research","volume":"21 6","pages":"1931 - 1943"},"PeriodicalIF":2.3,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11998-024-00941-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185756","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}