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An J, Zhang Y, Zhang X, He M, Zhou J, Zhou J, Liu Y, Chen X, Hu Y, Song X, Chen J, Wu T, Kang J, Xie Z. Structure and Properties of Epoxy Resin/Graphene Oxide Composites Prepared from Silicon Dioxide-Modified Graphene Oxide. ACS OMEGA 2024; 9:17577-17591. [PMID: 38645374 PMCID: PMC11024974 DOI: 10.1021/acsomega.4c00707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Revised: 03/10/2024] [Accepted: 03/15/2024] [Indexed: 04/23/2024]
Abstract
In this study, graphene oxide (GO) was modified via electrostatic interactions and chemical grafting by silica (SiO2), and two SiO2@GO hybrids (GO-A and GO-B, respectively) with different structures were obtained and carefully characterized. Results confirmed the successful grafting of SiO2 onto the GO surface using both strategies. The distribution of SiO2 particles on the surface of GO-A was denser and more agglomerated, while it was more uniform on the surface of GO-B. Then, epoxy resin (EP)/GO composites were prepared. The curing mechanism of EP/GO composites was studied by differential scanning calorimetry and in situ infrared spectra spectroscopy. Results of tensile tests, hardness tests, dynamic mechanical analysis, and dielectric measurement revealed that EP/GO-B exhibited the highest tensile properties, with a tensile strength of 79 MPa, a 43% increase compared to raw EP. Furthermore, the addition of fillers improved the hardness of EP, and EP/GO-B showed the highest energy storage modulus of 1900 MPa. The inclusion of SiO2@GO hybrid fillers enhanced the dielectric constant, volume resistivity, and breakdown voltage of EP/GO composites. Among these, EP/GO-B displayed the lowest dielectric loss, relatively good insulation, and relatively high volume resistivity and breakdown voltage. A related mechanism was proposed.
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Affiliation(s)
- Jin An
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Yue Zhang
- Dongfang Electric Machinery Co., Ltd., Deyang 618000, China
| | - Xiaojun Zhang
- Dongfang Electric Machinery Co., Ltd., Deyang 618000, China
| | - Mingpeng He
- Dongfang Electric Machinery Co., Ltd., Deyang 618000, China
| | - Jiang Zhou
- Dongfang Electric Machinery Co., Ltd., Deyang 618000, China
| | - Jin Zhou
- Dongfang Electric Machinery Co., Ltd., Deyang 618000, China
| | - Yan Liu
- Dongfang Electric Machinery Co., Ltd., Deyang 618000, China
| | - Xuebing Chen
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Yiwen Hu
- Xi'an Modern Chemistry Research Institute, Xi'an 710065, China
| | - Xiuduo Song
- Xi'an Modern Chemistry Research Institute, Xi'an 710065, China
| | - Jinyao Chen
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Tong Wu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Jian Kang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Zhihui Xie
- Dongfang Electric Machinery Co., Ltd., Deyang 618000, China
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Corrosion behaviour of zinc coated with composite silica layers incorporating poly(amidoamine)-modified graphene oxide. J Solid State Electrochem 2022. [DOI: 10.1007/s10008-022-05358-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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3
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Keshmiri N, Najmi P, Ramezanzadeh M, Ramezanzadeh B, Bahlakeh G. Ultrastable Porous Covalent Organic Framework Assembled Carbon Nanotube as a Novel Nanocontainer for Anti-Corrosion Coatings: Experimental and Computational Studies. ACS APPLIED MATERIALS & INTERFACES 2022; 14:19958-19974. [PMID: 35191688 DOI: 10.1021/acsami.1c24185] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Covalent organic frameworks (COFs) have been proposed as a wholly organic architecture sharing high crystallinity, porosity, and tuneability. Moreover, they exhibit highly stable structures against harsh chemical environments, including boiling water, strong acids and bases, and oxidation and reduction conditions, making them good candidates for extreme conditions. For the first time, a porous COF structure based on terephthalaldehyde and melamine was synthesized and employed as a novel nanocontainer for hosting corrosion inhibitors to provide a coating with superior active/passive anti-corrosion properties. In this study, the multi-walled carbon nanotube was utilized as a platform for growing COF (CC) to improve the coating's barrier and thermo-mechanical properties. The zinc cations were loaded into the CC structure (called CCZ) as one of the most promising inhibitors for mild steel. The COF-based nanoparticles' characterization was done by Fourier transform infrared, Raman, X-ray diffraction, thermogravimetric analysis, Brunauer-Emmett-Teller, field emission scanning electron microscopy, and transmission electron microscopy (TEM) techniques. Moreover, the Density functional theory modeling and molecular dynamics simulation quantitatively highlighted the adsorption propensity of the investigated COF structures onto the oxidized CNT-based nanostructures and the interactions of epoxy with these nanostructures. The CCZ nanoparticles (NPs) showed 75% inhibition efficiency in saline solution and 418 ppm zinc ions release after 24 h at acidic pH. The CCZ/EP coating revealed the smart release of inhibitor for 24 h and represented excellent barrier properties after 9 weeks of immersion in saline solution. In terms of mechanical properties, the elastic modulus values derived from the dynamic mechanical thermal analyzer were enhanced by 107 and 137% in CC/EP and CCZ/EP samples compared to the neat epoxy. Furthermore, the yield stress and breakpoint elongation were strengthened by 102 and 63% for the CC/EP sample, respectively. Finally, the highest pull-off adhesion strength in dry (8.53 MPa) and wet (2.7 MPa) conditions, along with the lowest adhesion loss (68.3%), was related to the CCZ/EP sample.
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Affiliation(s)
- Navid Keshmiri
- Surface Coating and Corrosion Department, Institute for Color Science and Technology, Tehran 8080, Iran
| | - Parisa Najmi
- Surface Coating and Corrosion Department, Institute for Color Science and Technology, Tehran 8080, Iran
| | - Mohammad Ramezanzadeh
- Surface Coating and Corrosion Department, Institute for Color Science and Technology, Tehran 8080, Iran
| | - Bahram Ramezanzadeh
- Surface Coating and Corrosion Department, Institute for Color Science and Technology, Tehran 8080, Iran
| | - Ghasem Bahlakeh
- Department of Chemical Engineering, Faculty of Engineering, Golestan University, Aliabad Katoul 39361-79142, Iran
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Shojaipour M, Ghaemy M. Highly efficient and antibacterial ion exchanger based on graphene oxide for removal of chromate and nitrate from water: synthesis, characterization and application. NEW J CHEM 2021. [DOI: 10.1039/d0nj04277c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A novel recyclable antibacterial anion exchanger based on graphene oxide (GO) and quaternary ammonium chloride (TMSQA) as a crosslinker/ion exchanger was prepared and used for the removal of chromate and nitrate from water.
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Affiliation(s)
- Maryam Shojaipour
- Polymer Research Laboratory
- Faculty of Chemistry
- University of Mazandaran
- Babolsar
- Iran
| | - Mousa Ghaemy
- Polymer Research Laboratory
- Faculty of Chemistry
- University of Mazandaran
- Babolsar
- Iran
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Javidparvar AA, Naderi R, Ramezanzadeh B. Non-covalently surface modification of graphene oxide nanosheets and its role in the enhancement of the epoxy-based coatings` physical properties. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125061] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Abstract
Due to the excellent properties of graphene, including flexibility that allows it to adjust to the curvature of the substrate surface, chemical inertness, and impermeability, graphene is used as an anticorrosion layer. In this review, we present the current state-of-the-art in the application of graphene in the field of protective coatings. This review provides detailed discussions about the protective properties of graphene coatings deposited by different methods, graphene-based organic coatings, the modification of graphene-based coatings, and the effects of graphene functionalization on the corrosion resistance of protective coatings.
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Huang H, Sheng X, Tian Y, Zhang L, Chen Y, Zhang X. Two-Dimensional Nanomaterials for Anticorrosive Polymeric Coatings: A Review. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c02876] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Haowei Huang
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, China
| | - Xinxin Sheng
- Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
| | - Yuqin Tian
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, China
| | - Li Zhang
- Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
| | - Ying Chen
- Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
| | - Xinya Zhang
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, China
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Preparation and Anti-Corrosive Properties of Waterborne Epoxy Composite Coating Containing Graphene Oxide Grafted with Sodium Tripolyphosphate. COATINGS 2020. [DOI: 10.3390/coatings10040307] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In this paper, graphene oxide (GO) was grafted with sodium tripolyphosphate (STP) to achieve a new anti-corrosive pigment (STG) with homogenous dispersion in waterborne epoxy (EP). The results obtained from Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and X-ray Diffraction (XRD) revealed that STP was successfully combined with GO by chemical bonding. The corrosion resistance of EP, GO/EP and STG/EP coatings on carbon steel substrates was investigated via electrochemical impedance spectroscopy (EIS) and salt spray test. The EIS results showed that the impedance value of coating with 0.7 wt.% STG reached 1.019 × 109 Ω∙cm2, which was considerably higher than that of neat waterborne EP coatings. Salt spray test results revealed once again that STG (0.7 wt.%)/EP coating had superior corrosion resistance. Besides, the STG (0.7 wt.%)/EP coated sample showed the highest adhesion strength between coating and substrate.
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Algarra M, Moreno V, Lázaro-Martínez JM, Rodríguez-Castellón E, Soto J, Morales J, Benítez A. Insights into the formation of N doped 3D-graphene quantum dots. Spectroscopic and computational approach. J Colloid Interface Sci 2020; 561:678-686. [DOI: 10.1016/j.jcis.2019.11.044] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Revised: 11/02/2019] [Accepted: 11/12/2019] [Indexed: 11/16/2022]
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10
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One-Step Preparation of Hyperbranched Polyether Functionalized Graphene Oxide for Improved Corrosion Resistance of Epoxy Coatings. COATINGS 2019. [DOI: 10.3390/coatings9120844] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this paper, hyperbranched polyether functionalized graphene oxide (EHBPE-GO) was prepared by a facile one-step method. Fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD), thermogravimetric analyzer (TGA), and trans-mission electron microscopy (TEM) results confirmed the formation of EHBPE-GO. Then, EHBPE-GO was cured with phenolic amides at room temperature to prepare epoxy coatings. The corrosion resistance of epoxy coatings was investigated systematically by using electrochemical and traditional immersion methods. Results show that a small amount of EHBPE-GO (8 wt % of Diglycidyl ether of bisphenol A (DGEBA)) in epoxy coating achieves 50% higher improvement in acid-resistance than unmodified neat DGEBA resin. For the nanocomposite epoxy coating, the superior acid-resistance is attributed to the increased crosslink density and the impermeable 2D structure of EHBPE-GO. This work provides a facile strategy to develop the effective improved corrosion resistance nanofiller for epoxy coating.
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Shao Z, Wang H, Li M, Chen T, Xu Y, Yuan C, Zeng B, Dai L. Effect of functionalized graphene oxide with phosphaphenanthrene and isocyanurate on flammability, mechanical properties, and thermal stability of epoxy composites. J Appl Polym Sci 2019. [DOI: 10.1002/app.48761] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zhiheng Shao
- Fujian Provincial Key Laboratory of Fire Retardant Materials, College of MaterialsXiamen University Xiamen 361005 China
- Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, No.1300 Jimei Road, Jimei Xiamen Fujian 361021 China
| | - Hongchao Wang
- Fujian Provincial Key Laboratory of Fire Retardant Materials, College of MaterialsXiamen University Xiamen 361005 China
| | - Meng Li
- Fujian Provincial Key Laboratory of Fire Retardant Materials, College of MaterialsXiamen University Xiamen 361005 China
| | - Ting Chen
- Fujian Provincial Key Laboratory of Fire Retardant Materials, College of MaterialsXiamen University Xiamen 361005 China
| | - Yiting Xu
- Fujian Provincial Key Laboratory of Fire Retardant Materials, College of MaterialsXiamen University Xiamen 361005 China
| | - Conghui Yuan
- Fujian Provincial Key Laboratory of Fire Retardant Materials, College of MaterialsXiamen University Xiamen 361005 China
| | - Birong Zeng
- Fujian Provincial Key Laboratory of Fire Retardant Materials, College of MaterialsXiamen University Xiamen 361005 China
| | - Lizong Dai
- Fujian Provincial Key Laboratory of Fire Retardant Materials, College of MaterialsXiamen University Xiamen 361005 China
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Nayak SR, Mohana KN, Hegde MB. Anticorrosion performance of 4-fluoro phenol functionalized graphene oxide nanocomposite coating on mild steel. J Fluor Chem 2019. [DOI: 10.1016/j.jfluchem.2019.109392] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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13
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Synthesis of Silane Functionalized Graphene Oxide and Its Application in Anti-Corrosion Waterborne Polyurethane Composite Coatings. COATINGS 2019. [DOI: 10.3390/coatings9090587] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
In this study, novel silane functionalized graphene oxide (PVSQ-GO) composite material is synthesized through the hydrolysis condensation reaction of vinyl triethoxysilane monomers occurred at the surface of graphene oxide. Results obtained from FTIR, Raman, X-ray photoelectronic spectroscopy (XPS), XRD and TGA measurements reveal that polyvinyl sesquisiloxane microspheres adhere to graphene oxide lamellae in the form of chemical bonds. Meanwhile, it is intuitive that abundant polyvinyl sesquisiloxane microspheres stick to the surface of graphene oxide and increase the thickness of the flake. Modified graphene oxide changes from hydrophilicity to hydrophobicity were owing to the existence of polyvinyl sesquisiloxane microspheres on the surface of graphene oxide (GO). PVSQ-GO composite exhibited good dispersion in eco-friendly waterborne polyurethane coating. Electrochemical impedance spectroscopy manifested that the anti-corrosion performance of waterborne polyurethane (WPU) coating embedded at 0.5 wt.% PVSQ-GO composite improved effectively. Tafel curves reveal that 0.5 wt.% PVSQ-GO/WPU coating specimen shows the lowest corrosion rate of 8.95 × 10−5 mm/year when compared with the other coating specimens. The good anti-corrosion abilities of PVSQ-GO composite coating can be interpreted as the good compatibility between PVSQ-GO composite and waterborne polyurethane, however, the intrinsic hydrophobicity of PVSQ-GO composite is beneficial to inhibit the permeation of corrosive medium and thus slows down the corrosion rate.
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An K, Peng S, Yang C, Qing Y, Hu C, Wang L, Liu C. Covalent modification of graphene oxide by 4,4′-methylenebis(phenyl isocyanate) to enhance corrosion resistance of polystyrene coating. Colloid Polym Sci 2019. [DOI: 10.1007/s00396-019-04500-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Palaniappan N, Cole IS, Caballero-Briones F, Manickam S, Lal C, Sathiskumar J. Neodymium-decorated graphene oxide as a corrosion barrier layer on Ti6Al4V alloy in acidic medium. RSC Adv 2019; 9:8537-8545. [PMID: 35518658 PMCID: PMC9062011 DOI: 10.1039/c9ra00106a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Accepted: 02/20/2019] [Indexed: 12/17/2022] Open
Abstract
Ti6Al4V alloy is light weight and is used in construction, oil industries and airbus, automobile, and bio implant materials. The native oxide layers of the alloy are not stable at high temperatures and strong mineral acid environments. The conventional epoxy-based layers are porous and the alloy finally fails in the harsh environment in the long term. Therefore, the carbon-based functional materials are being proposed as coating materials to overcome the alloy degradation. In the present contribution, we have used the neodymium-decorated graphene oxide as the corrosion inhibiting barrier for the Ti6Al4V alloy. As a novelty, we found that the few-layer graphene decorated with neodymium acts as a self-cleaning coating. The Nd-decorated graphene oxide were studied by XRD, TEM, FESEM, FTIR, UV, and Raman spectroscopy. The corrosion inhibition efficiency was studied by electrochemical methods.
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Affiliation(s)
- N Palaniappan
- School of Chemical Sciences, Central University of Gujarat 382030 India
| | - I S Cole
- Advance Manufacturing and Fabrication Research and Innovation, RMIT University Melbourne Vic 3100 Australia
| | - F Caballero-Briones
- Instituto Politecnico Nacional, Materials and Technologies for Energy, Health and Environment (GESMAT), CICATA Altamira 89600 Altamira Mexico
| | - S Manickam
- Faculty of Science and Engineering, University of Nottingham Malaysia Jalan Broga 43500 Malaysia
| | - C Lal
- Department of Chemistry, Harcourt Butler Technical University Kanpur India
| | - J Sathiskumar
- Big Data Science & Technology Limited London England UK
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Wu W, Xu Y, Wu H, Chen J, Li M, Chen T, Hong J, Dai L. Synthesis of modified graphene oxide and its improvement on flame retardancy of epoxy resin. J Appl Polym Sci 2019. [DOI: 10.1002/app.47710] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Wenqian Wu
- Fujian Provincial Key Laboratory of Fire Retardant Materials College of Materials, Xiamen University, Xiamen University Xiamen Fujian 361005 People's Republic of China
| | - Yiting Xu
- Fujian Provincial Key Laboratory of Fire Retardant Materials College of Materials, Xiamen University, Xiamen University Xiamen Fujian 361005 People's Republic of China
| | - Haiyang Wu
- Fujian Provincial Key Laboratory of Fire Retardant Materials College of Materials, Xiamen University, Xiamen University Xiamen Fujian 361005 People's Republic of China
| | - Jinmei Chen
- Fujian Provincial Key Laboratory of Fire Retardant Materials College of Materials, Xiamen University, Xiamen University Xiamen Fujian 361005 People's Republic of China
| | - Min Li
- Fujian Provincial Key Laboratory of Fire Retardant Materials College of Materials, Xiamen University, Xiamen University Xiamen Fujian 361005 People's Republic of China
| | - Ting Chen
- Fujian Provincial Key Laboratory of Fire Retardant Materials College of Materials, Xiamen University, Xiamen University Xiamen Fujian 361005 People's Republic of China
| | - Jing Hong
- Fujian Provincial Key Laboratory of Fire Retardant Materials College of Materials, Xiamen University, Xiamen University Xiamen Fujian 361005 People's Republic of China
| | - Lizong Dai
- Fujian Provincial Key Laboratory of Fire Retardant Materials College of Materials, Xiamen University, Xiamen University Xiamen Fujian 361005 People's Republic of China
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E. H, Fan H. Fluorinated functionalization of graphene oxide and its role as a reinforcement in epoxy composites. JOURNAL OF POLYMER RESEARCH 2019. [DOI: 10.1007/s10965-018-1687-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Ding R, Chen S, Lv J, Gui TJ, Wang X, Zhao XD, Liu J, Li BJ, Song LY, Li WH. Review of Theoretical and Applied Research of Graphene in Anti-corrosion Film and Organic Anti-corrosion Coatings. ACTA CHIMICA SINICA 2019. [DOI: 10.6023/a19050174] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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19
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Chen J, Lu H, Chen Y, Tao Z, Shao M. Stable aqueous dispersion of polymer functionalized graphene sheets from electrochemical exfoliation for anticorrosion application. Colloid Polym Sci 2017. [DOI: 10.1007/s00396-017-4173-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Graphene oxide-modified polyaniline pigment for epoxy based anti-corrosion coatings. CHEMICAL PAPERS 2017. [DOI: 10.1007/s11696-017-0146-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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The Effect of Graphene on the Protective Properties of Water-Based Epoxy Coatings on Al2024-T3. INTERNATIONAL JOURNAL OF CORROSION 2017. [DOI: 10.1155/2017/1541267] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
0.5 and 1% wt. of graphene nanoflakes were added to an anticorrosive additives-free water-based epoxy resin applied to Al2024-T3 samples. Calorimetric (DSC) and adhesion (cross-cut test) tests indicated that the presence of graphene did not affect the polymerization process of the resin or its adhesion to the substrate while it had some effect on its wettability. Electrochemical Impedance Spectroscopy (EIS) results obtained suggested that the addition of a small amount of graphene greatly enhanced the protective properties of the epoxy coating, retarding electrolytes absorption and reducing the total amount of adsorbed water. The latter occurrence suggests that the graphene effect on coating performances is related to both extended diffusion pathway length and graphene/matrix interaction due to the unique properties of graphene.
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