Progress in Organic Coatings最新文献_第9页

Enhanced photopolymerization and properties of UV-cured films with a tetrafunctional oxetane-based organosilicon monomer 使用四官能团氧杂环丁烷有机硅单体增强紫外线固化薄膜的光聚合能力和性能

IF 6.5 2区材料科学

Progress in Organic Coatings Pub Date : 2024-09-24 DOI: 10.1016/j.porgcoat.2024.108821

{"title":"Enhanced photopolymerization and properties of UV-cured films with a tetrafunctional oxetane-based organosilicon monomer","authors":"","doi":"10.1016/j.porgcoat.2024.108821","DOIUrl":"10.1016/j.porgcoat.2024.108821","url":null,"abstract":"<div><div>This study reports the successful synthesis of a novel tetrafunctional oxetane-based organosilicon monomer (QOX-Si), through a hydrosilation reaction. The monomer effectively boosts the photopolymerization efficiency of the blend consisting of 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate (E4221) and 1,2-epoxy-4-vinylcyclohexane (VOH). This improvement is particularly evident with the addition of 1.5 mol% QOX-Si, achieving an optimal conversion rate of 69.3 %. The integration of QOX-Si into UV-curable films results in remarkable improvements in thermal stability, as evidenced by increased T<sub>5%</sub> and T<sub>max</sub> values to 302 °C and 420 °C, respectively, the films demonstrate an elevated glass transition temperature (T<sub>g</sub>) of 204.4 °C, alongside exhibiting a remarkable gel yield of 98.3 %, a water contact angle of 91.3°, and enhanced Shore hardness reaching 87.2 HD. Moreover, the adhesion properties of the cured film are notably improved, particularly on PVC and glass substrates. These findings emphasize the promising role of QOX-Si in enhancing the performance standards of polymeric materials, particularly in applications that require superior thermal stability and robust mechanical properties.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142316148","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}

引用次数: 0

Synergistic modification of waterborne polyurethane by l-phenylalanine and quaternary ammonium salt: Synthesis and antibacterial properties 苯丙氨酸和季铵盐对水性聚氨酯的协同改性：合成与抗菌特性

IF 6.5 2区材料科学

Progress in Organic Coatings Pub Date : 2024-09-21 DOI: 10.1016/j.porgcoat.2024.108807

{"title":"Synergistic modification of waterborne polyurethane by l-phenylalanine and quaternary ammonium salt: Synthesis and antibacterial properties","authors":"","doi":"10.1016/j.porgcoat.2024.108807","DOIUrl":"10.1016/j.porgcoat.2024.108807","url":null,"abstract":"<div><div>For an extended period, the proliferation and propagation of microorganisms on material surfaces have posed an inevitable challenge, leading to potential surface deterioration and infection risks, resulting in substantial economic ramifications. To address this issue, the application of coatings on material surfaces has consistently proven to be a viable strategy. Waterborne polyurethane (WPU) stands out due to its cost-effectiveness, safety profile, environmental sustainability, and widespread applicability across various domains. However, owing to its limited antibacterial properties, it is seldom utilized as an antibacterial coating. This study delves into the antibacterial attributes of water-based polyurethane modified by L-Phe and QAs. The modified WPU exhibits exceptional antibacterial activity with effective inhibition of bacterial growth. The prepared emulsions demonstrate uniform dispersion in water with average particle sizes ranging from 46.63 nm to 153.95 nm. Zeta potential and centrifugal tests confirm the stability of the emulsion. Introduction of L-Phe increases the contact angle to 98.8°, a marked increase compared to pure quaternary ammonium based waterborne polyurethane-indicating heightened crosslinking density and film hydrophobicity post modification with L-Phe. The antibacterial test reveals that the aqueous polyurethane emulsion modified by quaternary ammonium salt and phenylalanine displays significant antibacterial activity against <em>Escherichia coli</em> and <em>Staphylococcus aureus</em> with maximum zone diameters reaching 15.6 mm and 15.8 mm respectively–significantly surpassing those observed for pure quaternary ammonium based aqueous polyurethanes. This suggests that introducing hydrophobic amino acid functional groups into quaternary ammonium based waterborne polyurethane systems can enhance both hydrophobicity and antibacterial activity, providing valuable insights for developing high-performance biocompatible antibacterial waterborne polyurethanes.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142311534","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}

引用次数: 0

Injectable and photocurable precursors with their improved adhesive elastomeric films by nature-inspired marine mussels chemistry 受自然启发的海洋贻贝化学可注射和光固化前体及其改良粘合弹性薄膜

IF 6.5 2区材料科学

Progress in Organic Coatings Pub Date : 2024-09-21 DOI: 10.1016/j.porgcoat.2024.108818

{"title":"Injectable and photocurable precursors with their improved adhesive elastomeric films by nature-inspired marine mussels chemistry","authors":"","doi":"10.1016/j.porgcoat.2024.108818","DOIUrl":"10.1016/j.porgcoat.2024.108818","url":null,"abstract":"<div><div>Photocurable materials, capable of being delivered as liquids and rapidly cured in situ within seconds using UV light, are garnering increased interest in advanced minimally invasive procedures. Examining living organisms to extract novel principles and technologies, and subsequently applying them into synthetic materials to enhance their performances holds a central position in biomimetics (bioinspiration). In this exploration, we delve into the multifaceted world of marine mussel adhesion, emphasizing the pivotal role of 3,4-dihydroxy-<em>L</em>-phenylalanine (L-DOPA) in adhesive proteins. Simultaneously, we navigated the promising realm of elastomers derived from fatty acid dimers. 90° peeling test and fluorescence microscope indicate that the adhesiveness of the catechol-containing samples (5 % and 10 %) to the hydrophilic surface versus control samples were ∼ 4 and 8 times higher, respectively, as compared to within the tested group. Overall, our results suggest that the incorporation of methacrylated L-DOPA in the synthesis of photocured elastomeric networks leads to lower water contact angle and improved adhesiveness, creating new avenues for potential biomedical applications.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142311533","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}

引用次数: 0

Excellent mechanical durability of superhydrophobic surface based on fiber array for biological applications 基于纤维阵列的超疏水表面在生物应用中的卓越机械耐久性

IF 6.5 2区材料科学

Progress in Organic Coatings Pub Date : 2024-09-21 DOI: 10.1016/j.porgcoat.2024.108817

引用次数: 0

A facile strategy to resolve the contradiction between dispersion stability and coating anti-smudge performance of bio-based waterborne polyurethane under ambient condition 解决生物基水性聚氨酯在环境条件下的分散稳定性和涂层防污性能之间矛盾的简便策略

IF 6.5 2区材料科学

Progress in Organic Coatings Pub Date : 2024-09-19 DOI: 10.1016/j.porgcoat.2024.108813

{"title":"A facile strategy to resolve the contradiction between dispersion stability and coating anti-smudge performance of bio-based waterborne polyurethane under ambient condition","authors":"","doi":"10.1016/j.porgcoat.2024.108813","DOIUrl":"10.1016/j.porgcoat.2024.108813","url":null,"abstract":"<div><p>It has been challenging to create a waterborne non-fluorinated anti-smudge coating product that is curable under ambient conditions (at room temperature and humidity) and performs superior repellence to both amphiphilic and lipophilic contaminants. Herein this work, this issue was addressed by introducing an aziridine (AZ) cross-linker into bio-based waterborne polyurethane grafted with 2 wt% poly(dimethylsiloxane) (WPU-<em>g</em>-PDMS) as an eco-friendly dewetting agent. The modified WPU-<em>g</em>-PDMS/AZ system achieves complete curing at room temperature, which enables the coating to have excellent anti-smudge and anti-corrosion properties. The results indicate the tri-functional AZ component could effectively cross-link with carboxyl groups present in WPU<em>-g</em>-PDMS under ambient conditions, preventing pollutants from adhering to the hydrophilic groups on the surface of the coating and significantly enhancing its anti-smudge performance. A wide range of contaminant liquids could slide off the coated surface without leaving any residues, and dust particles can be easily removed with a simple water wash, demonstrating its self-cleaning capability. Moreover, the anti-smudge characteristics of the coating could autonomously regenerate in instances of chemical corrosion or physical wear, highlighting its self-healing attributes. This study showcases the potential of utilizing bio-based materials and non-fluorinated dewetting agents to develop sustainable utility in both architectural and industrial applications.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142240829","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}

引用次数: 0

Low-frequency EIS interpretation with the potential to predict the durability of protective coatings 具有预测保护涂层耐久性潜力的低频 EIS 解释

IF 6.5 2区材料科学

Progress in Organic Coatings Pub Date : 2024-09-19 DOI: 10.1016/j.porgcoat.2024.108811

{"title":"Low-frequency EIS interpretation with the potential to predict the durability of protective coatings","authors":"","doi":"10.1016/j.porgcoat.2024.108811","DOIUrl":"10.1016/j.porgcoat.2024.108811","url":null,"abstract":"<div><div>Obtaining impedance response with predictive value for coating durability is central to meeting today's protective coatings end-user requirements. Here we present a novel approach to interpreting the low-frequency impedance of industrial coatings that takes into account the relevance of the coating properties that determine their barrier and adhesion durability. Modern, high adhesion, low VOC polymer coatings utilize cross-linking chemistry with polar or hydrogen bonding materials, leading to the apparent paradox that coatings exhibit corrosion creep values that are very low and inversely related to the barrier effect derived from the EIS response. In practice, once the corrosion creep rate is negligible, the ability of a coating to act as a long-term effective barrier, especially at edges and welds, becomes a major concern, and the improvement in durability relies on the improvement of the barrier. In the present study, we investigated the barrier effect of conventional partial and full offshore coating systems with epoxy and epoxy mastic layers applied without and with zinc-rich or zinc phosphate primers and polyurethane topcoats. The panels were aged for two years in an atmospheric offshore-like conditions and subsequently exhibited defects due to inadequate coating thickness, number of layers, surface preparation and inadequate application practice. EIS measurements were performed on the panels in the laboratory in dry and wet state. EIS provided a quantitative rating of the barrier effect that can serve as a basis for informed upgrading of coating solutions, application practices or workmanship quality, particularly in structures with limited access where high durability is an imperative.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142311532","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}

引用次数: 0

Corrigendum to “Dual-functional acridine-based coatings with anti-bacterial adhesion and durable photocatalytic antibacterial” [Prog. Org. Coat. 194 (2024) 108593] 具有抗菌粘附性和持久光催化抗菌性的双功能吖啶基涂层"[Prog. Org. Coat.

IF 6.5 2区材料科学

Progress in Organic Coatings Pub Date : 2024-09-17 DOI: 10.1016/j.porgcoat.2024.108809

引用次数: 0

Anti-corrosion studies on cardanol epoxy coatings cured with redox-active aromatic trimer and tetramer oligoanilines 用具有氧化还原活性的芳香族三聚体和四聚体低聚苯胺固化的卡旦醇环氧涂料的防腐蚀研究

IF 6.5 2区材料科学

Progress in Organic Coatings Pub Date : 2024-09-17 DOI: 10.1016/j.porgcoat.2024.108802

{"title":"Anti-corrosion studies on cardanol epoxy coatings cured with redox-active aromatic trimer and tetramer oligoanilines","authors":"","doi":"10.1016/j.porgcoat.2024.108802","DOIUrl":"10.1016/j.porgcoat.2024.108802","url":null,"abstract":"<div><p>In this article, structurally feasible aniline oligomers such as amine-capped trimer (DCTA) and tetramer (DCTAni) were synthesized and used as curing agents for coatings derived from epoxidized cardanol (ECD) and DGEBA (diglycidyl ether of bisphenol A). These two epoxies were optimized to an 80:20 (ECD: DGEBA) ratio to ensure that the coating system has a higher ECD content. The coatings (DCTA 20, DCTA 10, DCTA 5, DCTAni 20, DCTAni 10, and DCTAni 5) were formulated with different ratios of DCTA, and DCTAni with 20, 10, and 5 wt% ratios with respect to BDA (1,4-butane diamine). To evaluate the corrosion resistance of these coatings, steel panels were coated and exposed to a standard 3.5 % NaCl saline solution. Tafel polarization studies revealed that 20 wt% of DCTA/DCTAni provided excellent anti-corrosion properties, with a corrosion rate (C<sub>R</sub>) of 3.162 × 10<sup>−6</sup> and substantial improvement in polarization resistance (Rp) up to 128.32 MΩ. Furthermore, EIS analysis demonstrated that the coatings exhibited a maximum charge transfer resistance (R<sub>ct</sub>) of 72 MΩ, and 94 MΩ for DCTA-20, and DCTAni -20, respectively. The coatings sustained for 500 h of salt-spray test demonstrated the high performance of these coatings. Mechanical strength and storage modulus were assessed using UTM and DMTA, revealing significantly improved results. Thermal analysis showed improved thermal stability of the epoxy coatings when the BDA percentage was reduced with DCTA/DCTAni and improved glass transition (T<sub>g</sub>) temperature. Epoxy coatings on MS (mild steel) panels exhibited excellent abrasion resistance and adhesion to the substrate.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142240622","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}

引用次数: 0

Fluorine-containing main-chain type active esters as curing agents for epoxy resins to achieve superior dielectric and thermal performances 含氟主链型活性酯作为环氧树脂固化剂，可实现优异的介电和热性能

IF 6.5 2区材料科学

Progress in Organic Coatings Pub Date : 2024-09-17 DOI: 10.1016/j.porgcoat.2024.108806

{"title":"Fluorine-containing main-chain type active esters as curing agents for epoxy resins to achieve superior dielectric and thermal performances","authors":"","doi":"10.1016/j.porgcoat.2024.108806","DOIUrl":"10.1016/j.porgcoat.2024.108806","url":null,"abstract":"<div><p>Epoxy resins cured with active ester exhibited excellent dielectric properties but had deficiencies in thermal performance. To address this issue, this study synthesized three fluorine-containing main-chain type active ester curing agents (AE-1, AE-2, and AE-3) with bisphenol AF, isophthaloyl chloride and benzoyl chloride as raw materials. The effects of these active ester curing agents with different polymerization degree on the properties of dicyclopentadiene (DCPD) epoxy resins were investigated. Compared to the DCPD epoxy cured with AE-1，the DCPD epoxy cured with AE-3 which had high polymerization degree exhibited superior thermomechanical properties, thermal stability, and mechanical properties. Specifically, its glass transition temperature (T<sub>g</sub>) measured by DMA (T<sub>g</sub> -DMA) increased from 177 °C to 188 °C, T<sub>g</sub> measured by TMA (T<sub>g</sub> -TMA) increased from 130 °C to 149 °C, its 5 % mass loss temperature (T<sub>d5%</sub>) rose from 336 °C to 359 °C, and the tensile strength improved from 38.5 MPa to 84.4 MPa. At 10 GHz, DCPD/AE-3 maintained excellent dielectric properties, with dielectric constant (D<sub>k</sub>) and dissipation factor (D<sub>f</sub>) values of 2.76 and 7.36 ‰, respectively. Epoxy resins cured with fluorine-containing main-chain type active ester exhibited excellent thermomechanical properties, mechanical properties, and hydrophobic properties while maintaining superior dielectric properties, broadening its application in packaging materials.</p></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":null,"pages":null},"PeriodicalIF":6.5,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142241378","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}

引用次数: 0

Polydopamine-polyvinyl alcohol hydrogel coatings with enhanced mechanical and tribological performance 具有更佳机械和摩擦学性能的聚多巴胺-聚乙烯醇水凝胶涂层

IF 6.5 2区材料科学

Progress in Organic Coatings Pub Date : 2024-09-17 DOI: 10.1016/j.porgcoat.2024.108812

引用次数: 0