Progress in Organic Coatings最新文献

{"title":"Polyisocyanate bridged hexagonal boron nitride/polyaspartic nanocomposite coatings with superior tribological and anticorrosion performance","authors":"Xin Cheng ,&nbsp;Qiang Liu ,&nbsp;Yong Ye ,&nbsp;Shaochun Xie ,&nbsp;Haitao Xu","doi":"10.1016/j.porgcoat.2024.109027","DOIUrl":"10.1016/j.porgcoat.2024.109027","url":null,"abstract":"<div><div>The wear resistance of coatings is crucial in a wide range of fields, including automotive, wind power equipment, aerospace, manufacturing, and construction. The development and application of advanced wear and corrosive resistant coatings continue to be a focal point for research and innovation across these industries.</div><div>Hexagonal boron nitride (h-BN), known for its excellent barrier and self-lubricating characteristics, has demonstrated significant potential in enhancing the anti-corrosion and wear resistance of organic coatings. However, the strong interlayer interactions and inert surface of h-BN result in aggregation within coatings, which weakens interfacial interactions with polymer matrices and thereby limits its application in organic coatings. In this research, we devised a dual-modification strategy, integrating non-covalent and covalent techniques. Polydopamine served as a linking agent, allowing 4,4′-methylenediphenyl diisocyanate (MDI) molecules to be covalently attached to h-BN nanosheets, enhancing both dispersion and interfacial compatibility within high-solid polyaspartic (PAE) coatings. When compared to pure PAE, the MDIBN/PAE composite demonstrated a 10.8 % improvement in tensile strength and a 29.7 % increase in elongation at break. Friction tests further showed a 25.9 % reduction in the friction coefficient and a 40.1 % decrease in wear rate for the MDIBN/PAE composite coating, relative to the pure PAE. After 28 days of immersion in a 3.5 wt% NaCl solution, electrochemical impedance spectroscopy (EIS) indicated a maximum |Z|_0.01Hz of 7.48 × 10⁹ Ω·cm², surpassing the pure PAE by 1.5 orders of magnitude. The enhanced performance of the MDIBN/polyaspartic nanocomposite is attributed to the in-situ reaction, ensuring even distribution and excellent compatibility of MDIBN nanosheets within the polyaspartic matrix. This study highlights the potential of this coating for robust anti-corrosion and wear-resistant applications, particularly in metal protection.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"200 ","pages":"Article 109027"},"PeriodicalIF":6.5,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163688","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":"Green crosslinked gelatin films loaded with curcumin: A promising eco-friendly alternative for food packaging","authors":"Qi Zhang ,&nbsp;Jian Zhang ,&nbsp;Qingwei Ping ,&nbsp;Zhihui Sui ,&nbsp;Mizhao Song","doi":"10.1016/j.porgcoat.2025.109054","DOIUrl":"10.1016/j.porgcoat.2025.109054","url":null,"abstract":"<div><div>This research aims to address the issues of poor mechanical properties, inadequate moisture resistance, and unstable antioxidant properties in natural polymer active food films. In this research, we prepared crosslinked gelatin films loaded with curcumin using bis-formaldehyde carboxymethyl cellulose (OCMC) as a green crosslinking agent. A stable crosslinked network system consisting of imine covalent and hydrogen bonds was formed between OCMC and curcumin-loaded gelatin. As a result, the prepared crosslinked films exhibited excellent mechanical strength (fracture stress ≈ 18 MPa) and moisture resistance properties (WVP = 2.752 × 10⁻¹⁰ g m m⁻² Pa⁻¹ s⁻¹). Moreover, the films retained long-lasting antioxidant properties even after 96 h of storage at 4 °C, comparable to traditional Polyethylene (PE) preservation films. Additionally, the film exhibited UV resistance, recyclability, and natural biodegradability. Considering its environmentally friendly nature and reliable performance, the prepared curcumin-loaded crosslinked gelatin film shows promise as an alternative to non-biodegradable food packaging films.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"200 ","pages":"Article 109054"},"PeriodicalIF":6.5,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163686","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":"Learning from nature: Flexible cross-linkable full-bio-based waterborne S-PEEK sizing agent for constructing “hard-soft” structure on CF surface towards superior performance of CF/PEEK composites","authors":"Jiaming Guo ,&nbsp;Yao Yuan ,&nbsp;Jingyan Yuan ,&nbsp;Yujia Xie ,&nbsp;Dongfeng Li ,&nbsp;Fuyuan Song ,&nbsp;Weibing Pei ,&nbsp;Shubao Wen ,&nbsp;Yuanqi Wu ,&nbsp;Yu Liu","doi":"10.1016/j.porgcoat.2025.109056","DOIUrl":"10.1016/j.porgcoat.2025.109056","url":null,"abstract":"<div><div>The recently reported waterborne cross-linkable PEEK sizing agents have garnered considerable attention for refining the interfacial interaction and solvent-resistance of CF/PEEK composites. Nevertheless, the resultant stiff crosslinked structure has rendered the interphase brittle, seriously affecting the stress transfer and energy dissipation of composites. Inspired by the “hard-soft” components found in the robust pearl shells of nature, sebacic acid derived fluoride (F-AC) and magnolol have been employed to elaborate a flexible, cross-linkable, full-bio-based waterborne S-PEEK sizing agent, aimed at bolstering the mechanical strength of CF/PEEK. Additionally, the T_g and T_5% of S-PEEK were 61 °C and 442 °C, respectively. The particle size range of the waterborne S-PEEK sizing agents spanned from 184 to 286 nm. Notably, the cross-linked structure generated by the allyl groups within magnolol during the processing stage of CF/PEEK serves as the hard components, whereas the long-chain fatty segments of F-AC acts as the soft constituents. This combination constructs a biomimetic hard-soft structure on the CF surface, maximizing the advantages of rigid structures by incorporating soft components. Additionally, it collaboratively contributes to energy dissipation, prevents stress concentration, and mitigates the risk of brittle fracture in composites. Specifically, the bending strength, interfacial and interlaminar shear strength of CF/PEEK experienced respective increases of 40.71, 77.53 and 62.62 % compared to pristine CF/PEEK following sizing treatment. Notably, even after enduring 72 h of solvent aging, the mechanical integrity was preserved at approximate 95 %. Our work is expected to provide a promising strategy for fulfilling the distinguished capabilities of CF/PEEK in the future.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"200 ","pages":"Article 109056"},"PeriodicalIF":6.5,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163687","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":"Exploring the properties and performance of Lewis base organocatalysts in epoxy/polyester hybrid low-cure powder coatings","authors":"Xiao Lv ,&nbsp;Haiping Zhang ,&nbsp;Hui Zhang ,&nbsp;Yuanyuan Shao ,&nbsp;Jesse Zhu","doi":"10.1016/j.porgcoat.2025.109053","DOIUrl":"10.1016/j.porgcoat.2025.109053","url":null,"abstract":"<div><div>Low-cure powder coating (LCPC) is a novel, 100 % solvent-free, low-energy coating suitable for heat-sensitive substrates. The inclusion of a curing catalyst in the formulation effectively lowers the curing temperature and time. However, the structural morphology, physical and chemical properties and catalytic mechanism of catalysts still significantly constrain the research and application of LCPC. In this study, we reveal and conclude that the curing catalyst commonly used in LCPC is essentially Lewis base organocatalysts with well crystal form and particle sizes on the order of several tens of microns. The experimental results show the incorporation of different types of Lewis catalysts results in varying curing and surface performance in coatings. Increasing catalyst concentration from 0.08 % to 0.2 % improves curing efficiency at lower temperatures but negatively affects the visual quality of coating films. The HOMO-LUMO energy gap and density functional theory (DFT) transition state calculation indicate that the addition of imidazole type and quaternary ammonium salt type catalysts effectively reduces the activation energy of the curing reaction by promoting the epoxy ring opening via proton transfer and negative halogen ions, respectively. This study represents a systematic and mechanistic exploration of organocatalysts and their impact on LCPC, addressing a gap in academic research and providing insights for future developments in LCPC.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"200 ","pages":"Article 109053"},"PeriodicalIF":6.5,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163685","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 novel superior corrosion resistance polyimide–MXene (PI/Ti3C2Tx) composite coating for low alloy mild steel","authors":"Sukanta Badaik ,&nbsp;Suryakanta Nayak ,&nbsp;Balram Ambade ,&nbsp;Tapan Kumar Rout","doi":"10.1016/j.porgcoat.2024.109046","DOIUrl":"10.1016/j.porgcoat.2024.109046","url":null,"abstract":"<div><div>Two-dimensional (2D) nanomaterials such as graphene, boron nitride/white graphene, molybdenum disulfide, and MXene-based composite coatings are known to have anti-corrosion properties. However, interactions with saline environments can significantly influence the corrosion resistance behavior of the above coatings. Here, we reported MXene-polyimide based superior corrosion resistance coating on low alloy mild steel. MXene-polymer interactions serve as an efficient electron donor for the corrosion pathway, where these electrons modify oxygen-containing functional groups on MXene surfaces to generate reactive hydroxides. Therefore, the cathodic electrochemical reaction due to oxygen reduction is significantly controlled by MXene, as confirmed by the reduced cathodic slope in the Tafel polarization measurements. There is an increase in corrosion resistance of MXene-polyimide composite coating (2.58 × 10¹² Ω·cm²) compared to the pristine polyimide (1.77 × 10⁶ Ω·cm²), studied by electrochemical impedance spectroscopy using 3.5 % NaCl solution. As per the salt spray test, there is a significant enhancement in corrosion resistance of MXene-polyimide composite coating (&gt;500 h, 5 % red rust) compared to the pure polyimide coating (240 h, 5 % red rust). The addition of MXene to the polyimide matrix improves its adhesion strength (1.63 MPa to 2.3 MPa) with steel and electrical conductivity (7.5 × 10⁻⁶ S·cm⁻¹ to 1.0 × 10⁻² S·cm⁻¹) of the composite coating.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"200 ","pages":"Article 109046"},"PeriodicalIF":6.5,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163684","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":"“Kill two birds with one stone” strategy to attain intelligent early warning anti-corrosion coating with a dual response mechanism","authors":"Luyang Sun ,&nbsp;Zelin Liu ,&nbsp;Zhiguo Lv ,&nbsp;Yu Ding ,&nbsp;Jiawen Sun ,&nbsp;Chuanhui Gao","doi":"10.1016/j.porgcoat.2024.109030","DOIUrl":"10.1016/j.porgcoat.2024.109030","url":null,"abstract":"<div><div>Corrosion of metal materials has become a major challenge for marine facilities. Traditional anti-corrosion coatings cannot detect local corrosion in time, leading to significant maintenance costs. Therefore, providing an intelligent response performance to traditional anticorrosive coatings is essential. This study proposes an intelligent epoxy anticorrosion system based on the dual-mode response mechanism of visual color development and fluorescence quenching. The molecular structure was designed with the combination of 1,10-phenanthroline-5-amine (APhen) and E44 epoxy resin through a simple ring-opening reaction to obtain modified epoxy resin (EAPhen). The intelligent responsiveness of the epoxy resin was achieved through a simple and efficient complexation reaction. Subsequently, under the curing crosslinking of polyether amine D400, an epoxy resin anticorrosive coating (EAD-x) with excellent mechanical properties and visual response to corrosion products (Fe²⁺) was prepared. Furthermore, the high crosslinking density and dense three-dimensional network structure provided EAD-4 coating with good physical barrier properties. Additionally, APhen and local corrosion product Fe²⁺ were able to form a passivation layer protective film after a complexing reaction. The synergistic effect of these mechanisms gave the epoxy resin excellent corrosion resistance. After 7 days of immersion in 3.5 wt% NaCl solution, the |Z|_{0.01 Hz} value of the EAD-4 coating remained as high as 2.56 × 10¹¹ Ω•cm². Moreover, due to the “pinning” effect of E44, the adhesion level of EAD-4 coating to the substrate reached 5 B. In conclusion, this study provides a concept for realizing the visual self-warning function of local corrosion which is expected to offer a more reliable and efficient anti-corrosion protection scheme for marine engineering facilities while promoting sustainable development in this field.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"200 ","pages":"Article 109030"},"PeriodicalIF":6.5,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163744","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":"Multiscale analysis of breakdown strength in polyimide nanocomposite films: Simulations, experiments, and machine learning","authors":"Zhongli Zhang,&nbsp;Zhensheng Wu,&nbsp;Shuai Zheng,&nbsp;Haitao Yang,&nbsp;Fuqiang Tian","doi":"10.1016/j.porgcoat.2025.109058","DOIUrl":"10.1016/j.porgcoat.2025.109058","url":null,"abstract":"<div><div>Polyimide inorganic nanocomposites have become a major focus of research in various fields due to their excellent integrated properties. This study adopts a combination of theoretical simulations and experimental methods. Using Density Functional Theory (DFT) calculations, the microscopic properties of polyimide molecules and nano-TiO₂ and nano-Al₂O₃ were investigated, while Molecular Dynamics (MD) simulations revealed the microscopic mechanism behind the thermal breakdown of polyimide films. Subsequently, polyimide/titanium dioxide (PI/nano-TiO₂) and polyimide/titanium dioxide/alumina (PI/nano-TiO₂/nano-Al₂O₃) nanocomposite films were prepared. The results showed that the breakdown strength of the PI/nano-TiO₂ film was 3.58 times that of conventional polyimide films. The surface modification of nanoparticles was achieved by adding the coupling agent KH550, which enhanced the structure, morphology, and overall properties of the composite films, significantly improving their thermal stability. Our research framework adopts a multi-scale approach, starting with insights at the microscopic level obtained from Density Functional Theory (DFT) calculations and MD simulations, followed by experimental validation, and ultimately classifying the breakdown strength through machine learning. We systematically analyzed the breakdown performance of polyimide films across multiple scales, from molecular simulations and experimental analysis to machine learning, providing theoretical support and practical reference for the design of nanocomposite films, and demonstrating the potential of this material for high-performance dielectric applications.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"200 ","pages":"Article 109058"},"PeriodicalIF":6.5,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163675","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":"Deterioration mechanism of overlaid heavy-duty paint and thermal spray coatings on carbon steel plates in marine atmospheric environments","authors":"Qidi Wang ,&nbsp;Shigenobu Kainuma ,&nbsp;Haoxuan Yang ,&nbsp;Aran Kim ,&nbsp;Tomoaki Nishitani","doi":"10.1016/j.porgcoat.2025.109057","DOIUrl":"10.1016/j.porgcoat.2025.109057","url":null,"abstract":"<div><div>Thermal spray coatings, such as Zn, Zn-15Al, Al, and Al-5Mg, combined with heavy-duty paint, are increasingly used to enhance the corrosion resistance of steel structures. However, the overlaid areas of these coatings, particularly in damaged regions, can become weak points for corrosion initiation. To investigate the deterioration mechanisms at the overlaid zones of heavy-duty paint and thermal spray coatings on carbon steel plates, this study designed atmospheric exposure experiments and employed 3D scanning, electrochemical testing, and scanning electron microscope (SEM) - energy-dispersive X-ray spectrometer (EDX) analysis to systematically assess the degradation of the overlaid coatings in marine atmospheric environments. The results indicate that electrochemical reactions at coating defects drive the blistering and delamination of the overlaid coatings. Zn-based coatings, which provide sacrificial protection, exhibit slower failure progression compared to Al-based coatings, which show blistering due to passivation film formation. These findings provide valuable insights for optimizing thermal spray selection and overlaid coating strategies in marine atmospheric environments.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"200 ","pages":"Article 109057"},"PeriodicalIF":6.5,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163745","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":"Preparation of superhydrophilic coatings for inhibiting hydrate nucleation and repelling crude oil","authors":"Xinyu Yin ,&nbsp;Kangquan Yang ,&nbsp;Liying Liu ,&nbsp;Yuanyang Yan ,&nbsp;Pihui Pi ,&nbsp;Zhang Lin ,&nbsp;Xiufang Wen","doi":"10.1016/j.porgcoat.2024.109042","DOIUrl":"10.1016/j.porgcoat.2024.109042","url":null,"abstract":"<div><div>Oil and gas transportation has been plagued by <strong>pipeline blockage caused by natural gas hydrates nucleation and crude oil adhesion</strong>. While traditional coatings with inhibitory functional groups can inhibit hydrate nucleation, but their inhibitory performance can be restricted by crude oil adhesion. Meanwhile, anti-crude-oil-coatings fail to inhibit hydrate nucleation owing to lack of inhibitory functional groups. Thus, how to coordinate the inhibition and anti-adhesion properties of coatings is a rigorou8s challenge. Moreover, for water-phase dominated pipelines, inhibitory performance of coatings will be inevitably weakened if the coatings cannot offer sufficient density of inhibitory functional groups. Here, we report a strategy for designing coatings with <strong>anti-hydrate-nucleation and anti-crude-oil-adhesion properties,</strong> which can be achieved by <strong>introducing hydrophilic inhibitory functional groups</strong> into the polymer polyethylene glycol and constructing micro-nanostructures by coating them with <strong>hydrophilic nano SiO</strong>_{<strong>2</strong>} <strong>onto</strong> skeletons <strong>of porous Ni foam.</strong> Compared with uncoated Ni foam, the hydrate formation induction time of coated Ni foam was prolonged by 517.8 % and the adhesion force with crude oil was reduced by 93.3 %. The micro-nanostructures constructed by nano-SiO₂ and Ni foam <strong>increases the density of hydrophilic inhibitory functional groups</strong> and <strong>minimize the contact area</strong> with crude oil, which contribute to improve the anti-hydrate-nucleation and anti-crude-oil-adhesion performances of coatings. Molecular simulation and experimental results indicate that <strong>the hydrophilic inhibitory functional groups not only inhibit hydrate nucleation by disrupting the ordering of water molecules, but also repel crude oil by forming hydrated films</strong>. Therefore, this study offers an effective strategy for the development of coatings aimed at mitigating pipeline blockages caused by hydrates nucleation and crude oil adhesion.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"200 ","pages":"Article 109042"},"PeriodicalIF":6.5,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163743","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":"Functional group activation and coupling agent migration induced by plasma treatment in adhesive for enhanced toughness of metal-composite joints","authors":"Yongsoon Shin ,&nbsp;Yao Qiao ,&nbsp;Ethan K. Nickerson ,&nbsp;Areesa A. Trevino ,&nbsp;Mary Gilliam ,&nbsp;Graham Garner ,&nbsp;Michael Lukitsch ,&nbsp;Blair E. Carlson ,&nbsp;Kevin L. Simmons","doi":"10.1016/j.porgcoat.2024.109050","DOIUrl":"10.1016/j.porgcoat.2024.109050","url":null,"abstract":"<div><div>Commercial adhesive paste was additionally activated using low-power oxygen-containing plasma with different plasma exposure durations to investigate its interfacial bonding contribution in adhesively-bonded Aural-5/CFRP-PA6 double cantilever beam (DCB) joints with plasma-treated adherends. The plasma-treated adhesive showed enhanced functional peak intensities in Fourier transfer infrared spectroscopy (FTIR) as plasma exposure time was increased, and some degree of oxidation was also detected via X-ray photoelectron spectroscopy (XPS). A small molecule, dicyandiamide (coupling agent) in adhesive was migrated to adhesive layer, where double concentration of coupling agent was detected after 10 min of plasma treatment. As a result, characterization of the adhesive/CFRP-PA6 interface after DCB fracture showed additional chemical bonds formed through amine-initiated epoxy ring opening polymerization, as well as amide bonds and ester bonds. These additional bonds at the adhesive/CFRP-PA6 interfaces led to significantly increased failure extensions and fracture energies of the joints as the plasma exposure time on the adhesive increased, compared to the joints with plasma-treated adherends but non-plasma-treated adhesive as commonly seen in the literature.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"200 ","pages":"Article 109050"},"PeriodicalIF":6.5,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163521","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}