Progress in Organic Coatings最新文献_第9页

Enhancing corrosion and wear resistance performances of epoxy coating with incorporation of solution processable gallocyanine-functionalized rGO

IF 6.5 2区材料科学

Progress in Organic Coatings Pub Date : 2025-01-05 DOI: 10.1016/j.porgcoat.2024.109043

Wenjing Wang , Chenfeng Jia , Xianchang Liang , Meiling Wang , Haichao Zhao

{"title":"Enhancing corrosion and wear resistance performances of epoxy coating with incorporation of solution processable gallocyanine-functionalized rGO","authors":"Wenjing Wang , Chenfeng Jia , Xianchang Liang , Meiling Wang , Haichao Zhao","doi":"10.1016/j.porgcoat.2024.109043","DOIUrl":"10.1016/j.porgcoat.2024.109043","url":null,"abstract":"<div><div>The dispersion of reduced graphene oxide (rGO) nanosheets in organic solvents and its compatibility in polymer matrix is crucial to enhancing the anticorrosion and anti-wear performance of the formed composites. Herein, we developed a new exfoliation method using aromatic gallocyanine as dispersant via π-π interaction between rGO and gallocyanine molecules with the assistance of ball milling, and successfully obtained a well-dispersed rGO ethanol solution. Results obtained from transmission electron microscopy (TEM), Raman spectroscopy, UV–vis absorbance spectroscopy (UV-VIS) and scanning probe microscopy (SPM) reveal the successful exfoliation of rGO nanosheets. Furthermore, the corrosion and wear resistance of g-rGO/EP coating were systematically evaluated by electrochemical measurements, tribological tests, scanning electron microscope (SEM), laser scanning confocal microscopy (LSCM), and Raman spectroscopy. Results demonstrated that gallocyanine-dispersed rGO nanosheets endowed resin matrix with outstanding long-term anticorrosive and excellent anti-wear properties compared to pure epoxy resin (EP), whose impedance at low-frequency limit kept 4.789 × 10<sup>9</sup> Ω cm<sup>2</sup> after immersing 75 days in 3.5 wt% NaCl and wear rate showed a decrease of nearly 74.8 %. The remarkable properties can be ascribed to the enhanced multi-layer barrier property and lubrication effect caused by g-rGO.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"200 ","pages":"Article 109043"},"PeriodicalIF":6.5,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163740","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

Corrosion mechanism and resistance of g-C3N5@PDA nanosheets modified epoxy-coated carbon steel

IF 6.5 2区材料科学

Progress in Organic Coatings Pub Date : 2025-01-05 DOI: 10.1016/j.porgcoat.2024.109048

Fujian Tang , Yongde Yao , Shangtong Yang

{"title":"Corrosion mechanism and resistance of g-C3N5@PDA nanosheets modified epoxy-coated carbon steel","authors":"Fujian Tang , Yongde Yao , Shangtong Yang","doi":"10.1016/j.porgcoat.2024.109048","DOIUrl":"10.1016/j.porgcoat.2024.109048","url":null,"abstract":"<div><div>Nitrogen-rich carbon nitride (g-C<sub>3</sub>N<sub>5</sub>) nanosheets were modified with polydopamine (PDA) and then incorporated into an epoxy resin (EP) matrix to create a g-C<sub>3</sub>N<sub>5</sub>@PDA modified epoxy (GP/EP) coating. The phase composition, microstructure, and mechanical properties were analyzed using X-ray diffraction, scanning electron microscopy, and nano-indentation. The corrosion behavior was investigated by applying the coating to a steel plate and immersing it in a NaCl solution for 20 days using electrochemical impedance spectroscopy and potentiodynamic polarization tests. Molecular dynamics simulations were also conducted to elucidate the corrosion mechanism. The results indicated that the hardness and elastic modulus of the epoxy coating increased from 0.02 GPa to 0.26 GPa and from 0.92 GPa to 2.90 GPa, respectively, after the modification of g-C<sub>3</sub>N<sub>5</sub> nanosheets with PDA. Additionally, the corrosion current density of the GP/EP-coated steel plate was measured at 0.51 μA/cm<sup>2</sup>, which is approximately 17 times lower than that of the EP-coated plate when immersed in a 3.5 wt% NaCl solution.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"200 ","pages":"Article 109048"},"PeriodicalIF":6.5,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163741","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

Epoxy-acrylate/nano-SiO2 hybrid formulations for optoelectronic coatings

IF 6.5 2区材料科学

Progress in Organic Coatings Pub Date : 2025-01-05 DOI: 10.1016/j.porgcoat.2025.109052

S.V. Dezhurov, I.S. Chekulaev, R.N. Kucherov, D.N. Chausov

{"title":"Epoxy-acrylate/nano-SiO2 hybrid formulations for optoelectronic coatings","authors":"S.V. Dezhurov, I.S. Chekulaev, R.N. Kucherov, D.N. Chausov","doi":"10.1016/j.porgcoat.2025.109052","DOIUrl":"10.1016/j.porgcoat.2025.109052","url":null,"abstract":"<div><div>Hybrid organic-inorganic materials have gained increasing attention from researchers due to their environmental benefits and wide application potential. In this study, a novel method for fabricating UV-curable and bifunctional epoxy acrylates (EA) – silica hybrid coatings was developed, utilizing surface-modified nanoparticles with sizes ranging from 12 to 18 nm as fillers. Three types of EA monomer were synthesized using conventional methods. The inorganic phase of silica was obtained in the presence of polyacrylic acid, which served as a surfactant, and subsequently modified with 3-(trimethoxysilyl)propyl acrylate before being introduced into the monomer dispersion. The impact of SiO<sub>2</sub> nanoparticles on the rheology of the final coating precursor was examined, demonstrating the capacity to alter the viscosity of the formulation from several mPa·s to over 10 Pa·s, as well as to modify the refractive index (RI) from 1.43 to 1.55.</div><div>The composite materials synthesized in the visible range (400–800 nm) exhibited a transmittance of over 96 % following exposure to UV radiation (350–390 nm) and thermal curing at temperatures below 100 °C. The resulting materials demonstrate excellent heat resistance up to 200 °C and adhesive ability. The surfaces of the hybrid coatings were examined using scanning electron microscopy (SEM), which revealed a smooth surface devoid of any microcracks. The potential of using the composite as a photoresist for organic optoelectronic systems was demonstrated. This class of transparent photomaterials can be employed in photoconversion microstructures based on QDs, which are widely used in QLED displays, as well as in sealing coatings for photovoltaic organic devices.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"200 ","pages":"Article 109052"},"PeriodicalIF":6.5,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163739","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

Study on preparing the latexes composed of polyvinyl chloride-acrylate copolymers with core-shell structure for increasing water resistance of its coating

IF 6.5 2区材料科学

Progress in Organic Coatings Pub Date : 2025-01-05 DOI: 10.1016/j.porgcoat.2024.109014

Yu Wu , Xinhui Qi , Yue Zhang , Shufen Wang , Yunsheng Ding

{"title":"Study on preparing the latexes composed of polyvinyl chloride-acrylate copolymers with core-shell structure for increasing water resistance of its coating","authors":"Yu Wu , Xinhui Qi , Yue Zhang , Shufen Wang , Yunsheng Ding","doi":"10.1016/j.porgcoat.2024.109014","DOIUrl":"10.1016/j.porgcoat.2024.109014","url":null,"abstract":"<div><div>The insufficient water resistance of waterborne coatings is an important factor limiting their applications. Herein, the latexes composed of polyvinyl chloride-acrylate copolymer (PVC-ACM) with a core-shell structure have been synthesized via seeded emulsion polymerization, and coupling agents were introduced into the polymerization to reinforce the core-shell interfacial bonding and increasing the water resistance of the PVC-ACM coatings. The effects of quantity, types of surfactants, and introducing way of coupling agent into seed emulsion polymerization on the performance of the latex and the water resistance of the PVC-ACM coatings were investigated. The results determined that latex particles composed of PVC-ACM copolymers exhibit a core-shell structure when the PVC content reaches 40 wt%, and the comprehensive performance of the latex reaches its optimum when a combined surfactant system consists of 2.5 wt% SR-10/CO-436 while the introduction amount of coupling agent KH570 is 2 wt%. Moreover, the water contact angle of coatings consisting of PVC-ACM latex reached 92.3°, and the 24-h water absorption rate decreased to 2.4 %. This study presented a promising approach for developing the new waterborne coatings with superior water resistance.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"200 ","pages":"Article 109014"},"PeriodicalIF":6.5,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163734","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

Enhancing corrosion protection and luminescence in bio-based polyurethanes with fluorescent azine segments

IF 6.5 2区材料科学

Progress in Organic Coatings Pub Date : 2025-01-05 DOI: 10.1016/j.porgcoat.2024.109051

Marwa M. Sayed , Abd Elrahman M. Salama , Mohamed Abdel-Hakim , Kamal I. Aly

{"title":"Enhancing corrosion protection and luminescence in bio-based polyurethanes with fluorescent azine segments","authors":"Marwa M. Sayed , Abd Elrahman M. Salama , Mohamed Abdel-Hakim , Kamal I. Aly","doi":"10.1016/j.porgcoat.2024.109051","DOIUrl":"10.1016/j.porgcoat.2024.109051","url":null,"abstract":"<div><div>Bio-based polyurethanes (PUHs) derived from castor oil (CO) have emerged as promising materials due to their mechanical resistance and chemical inactivity; they have found tremendous application growth. The physical and chemical properties of polyurethane (PUH1–3) made from castor oil polyol (COP) and various polyols, such as 1,4-phenylene bis (2,4-dihydroxy benzylidene) azine (PDaz) or polyol of (epoxy castor oil (ECO) with PDaz) (Eaz) with hexamethylene diisocyanate (HMDI), are investigated and compared for their light emission and corrosion inhibition of mild steel (MS). Thermogravimetric analysis (TGA), scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR) are used to assess the differences in characteristics of different PUH forms. As a result of incorporating fluorescent hard segment azine PDaz into the polymer with various preparation strategies, luminescent non-conjugated polyurethane derivatives (PUHs) have been obtained straightforwardly in high yields, affording PUHs with advantageous emission and corrosion inhibition properties. According to the photoluminescence (PL) study, simply changing the strategy by which a fluorescent material is incorporated can either increase the intensity of the emitted color or cause it to shift to a longer wavelength as the PUHs exhibit excitation dependency behavior. The corrosion inhibition applications of PUHs were discovered to be very effective and varied depending on the procedure of molecule preparation. PUH3 exhibited a corrosion inhibition efficacy of about 97.6 %, and these compounds display properties of mixed-type corrosion inhibitors. The intriguing results of these compounds indicate promising coating applications characterized by outstanding strength and optimal adherence and open up promising avenues for using these compounds in luminous coatings.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"200 ","pages":"Article 109051"},"PeriodicalIF":6.5,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163735","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

A mussel-inspired lignin micro-nanospheres/epoxy composite coating with superhydrophobicity, ultraviolet resistance, and photothermal conversion performance for excellent corrosion control

IF 6.5 2区材料科学

Progress in Organic Coatings Pub Date : 2025-01-05 DOI: 10.1016/j.porgcoat.2024.109049

Xin Lai, Jianfeng Hu, Jinqing Qu

{"title":"A mussel-inspired lignin micro-nanospheres/epoxy composite coating with superhydrophobicity, ultraviolet resistance, and photothermal conversion performance for excellent corrosion control","authors":"Xin Lai, Jianfeng Hu, Jinqing Qu","doi":"10.1016/j.porgcoat.2024.109049","DOIUrl":"10.1016/j.porgcoat.2024.109049","url":null,"abstract":"<div><div>Developing epoxy (EP) anti-corrosion coatings with ultraviolet (UV) resistance by incorporating natural fillers remains a significant challenge. Herein, a functionalized biomass filler (LMNS@PDA/ODE) is synthesized via sequentially grafting polydopamine (PDA) and low surface energy substances (ODE) on the surface of lignin micro-nanospheres (LMNS) and further preparing a multifunctional LMNS@PDA/ODE-EP coating for corrosion protection of carbon steel. As expected, LMNS@PDA/ODE exhibits excellent dispersion stability in EP and endows the composite coating with a high adhesion strength (5.9 MPa). Benefiting from the reinforced physical barrier (a water absorption rate of 0.55 %) and superhydrophobic performance (a surface free energy of 4.65 mJ∙m<sup>−2</sup>), the initial impedance modulus (|Z|<sub>0.01 Hz</sub>) of 2LMNS@PDA/ODE-EP coating (8.05 × 10<sup>8</sup> Ω∙cm<sup>2</sup>) is significantly higher than that of EP coating (8.91 × 10<sup>4</sup> Ω∙cm<sup>2</sup>) after immersing in 3.5 wt% NaCl solution for 50 days. In addition, 2LMNS@PDA/ODE-EP coating exhibits excellent UV-blocking properties, as demonstrated by the high |Z|<sub>0.01 Hz</sub> of 4.86 × 10<sup>9</sup> Ω∙cm<sup>2</sup>, as well as the low gloss loss (11.0 %) and minimal color difference (2.2). Furthermore, the superhydrophobicity of the 2LMNS@PDA/ODE-EP coating is capable of restoration after simulating sunlight exposure for 10 min under 200 mW·cm<sup>−2</sup> owing to the efficient photothermal conversion performance. Therefore, this work provides a multifunctional coating for long-term corrosion protection, facilitating the value-added utilization of lignin and the development of environmentally friendly coatings.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"200 ","pages":"Article 109049"},"PeriodicalIF":6.5,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163736","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

Effect of new phenylalanine monomer and molecular structure on water and heat resistance of pressure-sensitive adhesive

IF 6.5 2区材料科学

Progress in Organic Coatings Pub Date : 2025-01-05 DOI: 10.1016/j.porgcoat.2024.109041

Zhijun Liu , Wenjie Diao , Guoming Yuan , Hui Yang , Yanghan Tao , Kun Wu , Jun Shi , Li Yang

{"title":"Effect of new phenylalanine monomer and molecular structure on water and heat resistance of pressure-sensitive adhesive","authors":"Zhijun Liu , Wenjie Diao , Guoming Yuan , Hui Yang , Yanghan Tao , Kun Wu , Jun Shi , Li Yang","doi":"10.1016/j.porgcoat.2024.109041","DOIUrl":"10.1016/j.porgcoat.2024.109041","url":null,"abstract":"<div><div>Acrylate pressure-sensitive adhesives (PSA) have been widely used in daily life and industrial manufacturing. However, its inherent hydrophilicity and low cohesive strength severely limit its application under harsh conditions such as underwater and high temperature. In this study, the molecular structure of PSA was carefully designed to take advantage of the structurally advantageous strategy of <em>N</em>-acryloylphenylalanine (ACP), and PSA was prepared by copolymerization of ACP with commonly used acrylic monomers. The rigid benzene ring of ACP facilitates the breaking of the hydration layer on the surface of the PSA-substrate underwater, and the carboxylic acid facilitates the establishment of an effective physical interaction between PSA and substrate. As a result, compared with the conventional acrylic ABP<sub>0.1</sub>-AA<sub>10</sub>, the ABP<sub>0.1</sub>-ACP<sub>10</sub> exhibited excellent adhesion properties underwater and at high temperature, with an underwater peel strength of 3.1 N and a high-temperature peel strength of 8.7 N, which were increased by 181.1 % and 234.6 %, respectively. Notably, the UV-induced cross-linking and rigid benzene ring restricted the movement of molecular chains, giving ABP<sub>0.1</sub>-ACP<sub>10</sub> good heat resistance (T<sub>HRI</sub>: 178.3 °C) and water resistance. Our work may provide a promising solution for designing PSA with good water resistance, heat resistance and high cohesion.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"200 ","pages":"Article 109041"},"PeriodicalIF":6.5,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163737","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

Epoxy coating smart anti-corrosion properties advancement using Zn2+/sodium gluconate loaded multi-walled CNTs nano-carrier

IF 6.5 2区材料科学

Progress in Organic Coatings Pub Date : 2025-01-05 DOI: 10.1016/j.porgcoat.2024.109045

Maryam Sanchuli , Ghasem Bahlakeh , Bahram Ramezanzadeh

{"title":"Epoxy coating smart anti-corrosion properties advancement using Zn2+/sodium gluconate loaded multi-walled CNTs nano-carrier","authors":"Maryam Sanchuli , Ghasem Bahlakeh , Bahram Ramezanzadeh","doi":"10.1016/j.porgcoat.2024.109045","DOIUrl":"10.1016/j.porgcoat.2024.109045","url":null,"abstract":"<div><div>This study explores the impact of zinc‑sodium gluconate-modified carbon nanotubes (multi-walled type) (SG-OMWCNTs-Zn) on the epoxy nano-composite active protection capability. XRD, Raman, FE-SEM, FT-IR, BET, and UV–Vis techniques were utilized to analyze the microstructure of the designed nanoparticles. Via potentiodynamic polarization and EIS measurements, the designed nanoparticles' ability to suppress the steel corrosion was investigated in a saline media. Thereafter, the nanoparticles were added to an epoxy matrix (EP), and their anti-corrosion ability and adhesion bonds' durability were studied by EIS, cathodic disbondment, pull-off, and salt spray tests. Results illustrated that the steel corrosion was suppressed by about 86 % in the Zn-SG-OMWCNT containing NaCl media. Results also evidenced the corrosion resistance of about 57,008 Ω.cm<sup>2</sup> for the scratched SG-OMWCNT-Zn/EP sample after 48 h of exposure, which was about 4 times higher than the neat EP sample, declaring suitable self-healing properties. In comparison with the blank EP, the adhesion bond strength improvement (83 %) and cathodic disbondment reduction (75 %) were obtained for the SG-OMWCNT-Zn containing EP. Furthermore, the addition of SG-OMWCNT-Zn particles to the EP sample in an intact state (without a scratch) resulted in about a 49 % increase in the impedance in comparison with the neat EP. Alongside the aforementioned experiments, the adsorption of SG and Zn<sup>+2</sup>/SG complexes on the OMWCNT was computationally investigated via DFT-D methodology, which theoretically showed interfacial adsorption.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"200 ","pages":"Article 109045"},"PeriodicalIF":6.5,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163733","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

Robust superhydrophobic anti-corrosion coating with self-cleaning and anti-fouling

IF 6.5 2区材料科学

Progress in Organic Coatings Pub Date : 2025-01-05 DOI: 10.1016/j.porgcoat.2024.109047

Chuanbo Zheng , Changxin Lai , Guo Yi , Han Ma , Dianchun Ju , Jiming Zhang , Rui Mao , Xianjun Hu , Lixin Xu

{"title":"Robust superhydrophobic anti-corrosion coating with self-cleaning and anti-fouling","authors":"Chuanbo Zheng , Changxin Lai , Guo Yi , Han Ma , Dianchun Ju , Jiming Zhang , Rui Mao , Xianjun Hu , Lixin Xu","doi":"10.1016/j.porgcoat.2024.109047","DOIUrl":"10.1016/j.porgcoat.2024.109047","url":null,"abstract":"<div><div>Superhydrophobic materials have a wide application prospect because of their non-wettability, low surface energy and excellent repulsion to water, so that water droplets can easily roll off the surface without any adhesion. However, poor mechanical stability, complex preparation process, high price, difficult to large-scale preparation and other problems hinder its popularization. Therefore, we developed a corrosion-resistant and robust superhydrophobic coating based on PFDTES@ Al<sub>2</sub>O<sub>3</sub> NPs and epoxy resin through a simple spraying technique. The contact angle and sliding angle of the coating are 153.8 ± 0.6° and 3.8 ± 0.5°, respectively. The results of mechanical stability and electrochemical impedance spectroscopy (EIS) show that the coating has excellent mechanical stability, which can withstand 135 sandpaper abrasion cycles and 180 tape-peeling cycles. The low-frequency modulus (|Z|<sub>0.01Hz</sub>) and Rct of the coating are increased by 8 and 9 orders of magnitude, respectively, indicating that the coating can play a very good role as a protective barrier. Additionally, the coating has also demonstrated anti-fouling properties against various liquids (dyed water, black tea, Coca cola, coffee, milk, Melinda soda), good self-cleaning properties and a wide range of substrate applicability, and we believe that the coating has a bright future application prospect.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"200 ","pages":"Article 109047"},"PeriodicalIF":6.5,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163738","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

Effects of crosslinking structure on the corrosion resistance and hydrophobicity of solvent-free epoxy/benzoxazine composite coating

IF 6.5 2区材料科学

Progress in Organic Coatings Pub Date : 2025-01-02 DOI: 10.1016/j.porgcoat.2024.109036

Chenpei Li, Shenhao Song, Sentao Lin, Hongyang Zhang, Haitao Wan, Xin Meng, Changlu Zhou

{"title":"Effects of crosslinking structure on the corrosion resistance and hydrophobicity of solvent-free epoxy/benzoxazine composite coating","authors":"Chenpei Li, Shenhao Song, Sentao Lin, Hongyang Zhang, Haitao Wan, Xin Meng, Changlu Zhou","doi":"10.1016/j.porgcoat.2024.109036","DOIUrl":"10.1016/j.porgcoat.2024.109036","url":null,"abstract":"<div><div>A low-viscosity benzoxazine (Bz) was used as both a curing agent and diluent for epoxy resin (EP), leading to the development of a solvent-free EP/Bz (EPB) coating with eco-friendly characteristics. The crosslinking structure of EPB coatings was controlled via a tailored curing program and analyzed using Fourier transform infrared spectrometer and gel content measurement. Results show that the coating's crosslinking structure becomes denser as the curing procedure processing to higher temperatures, with EP and Bz achieving maximum conversions of approximately 100 % and 90 %, respectively, indicating the importance of the curing procedure in determining the coating's crosslinking density. Electrochemical impedance spectroscopy over 120 days reveals that the corrosion resistance of EPB coatings is linked to their crosslinking density. EPB210, with the highest final curing temperature, demonstrates superior corrosion resistance with an impedance modulus >1 GΩ·cm<sup>2</sup> and maintains stability throughout 4 months of immersion in a 3.5 wt% NaCl solution. Besides its optimal crosslinking density, this performance is attributed to its best hydrophobicity within the EPB system, as verified by water contact angle measurements, water absorption tests, and hydrogen bond analysis.</div></div>","PeriodicalId":20834,"journal":{"name":"Progress in Organic Coatings","volume":"200 ","pages":"Article 109036"},"PeriodicalIF":6.5,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163212","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