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Necolau MI, Bălănucă B, Frone AN, Radu IN, Grădişteanu-Pîrcălăbioru G, Damian CM. Combined Thermomechanical Effect of Graphene Oxide and Montmorillonite on Biobased Epoxy Network Formation for Coatings. ACS OMEGA 2024; 9:8297-8307. [PMID: 38405461 PMCID: PMC10882706 DOI: 10.1021/acsomega.3c09059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/30/2023] [Accepted: 01/05/2024] [Indexed: 02/27/2024]
Abstract
Epoxy nanocomposites derived from linseed oil, reinforced with graphene oxide (GO) and montmorillonite (MMT) nanostructures, were synthesized. The nanohybrids were developed by enriching the structure of MMT and GO with primary amines through a common and simplified method, which implies physical interactions promoted by ultrasonic processing energy. The influence of the new nanoreinforcing agents along with neat ones on the overall properties of the biobased epoxy materials for coating applications was assessed. Interface formation through surface compatibility was contained by the lower values of activation energy calculated from differential scanning calorimetry (DSC) curves, along with a consistent 70% increase in the cross-linking density when amine-modified MMT was used. Thermomechanical characteristics of the biobased epoxy nanocomposites were explained through the interaction of the functional groups over the curing process of epoxidized linseed oil (ELO), giving a 15 °C higher Tg value increase. Furthermore, the low surface energy values suggested an intrinsic antibacterial activity, as proved by a significant decrease of CFU against Staphylococcus aureus bacterial strains on the 0.25% reinforced coatings.
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Affiliation(s)
- Mădălina Ioana Necolau
- Advanced Polymer Materials Group, National University of Science and Technology Politehnica Bucharest, 1-7 Gh. Polizu Street, Bucharest 011061, Romania
| | - Brînduşa Bălănucă
- Advanced Polymer Materials Group, National University of Science and Technology Politehnica Bucharest, 1-7 Gh. Polizu Street, Bucharest 011061, Romania
- Department of Organic Chemistry "C. Nenitescu", National University of Science and Technology Politehnica Bucharest, 1-7 Gh. Polizu Street, Bucharest 011061, Romania
| | - Adriana Nicoleta Frone
- National Institute for Research & Development in Chemistry and Petrochemistry - ICECHIM, 202 Spl. Independentei, Bucharest 060021, Romania
| | - Iulia Nicoleta Radu
- Advanced Polymer Materials Group, National University of Science and Technology Politehnica Bucharest, 1-7 Gh. Polizu Street, Bucharest 011061, Romania
| | - Graţiela Grădişteanu-Pîrcălăbioru
- eBio-hub Research-Center, National University of Science and Technology Politehnica Bucharest, 6 Iuliu Maniu Boulevard, Campus Building, Bucharest 061344, Romania
- Research Institute of University of Bucharest, University of Bucharest, Bucharest 050095, Romania
- Academy of Romanian Scientists, 54 Splaiul Independentei, Bucharest 050094, Romania
| | - Celina Maria Damian
- Advanced Polymer Materials Group, National University of Science and Technology Politehnica Bucharest, 1-7 Gh. Polizu Street, Bucharest 011061, Romania
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Hasan GG, Laouini SE, Khelef A, Mohammed HA, Althamthami M, Meneceur S, Alharthi F, Alshareef SA, Menaa F. Efficient treatment of oily wastewater, antibacterial activity, and photodegradation of organic dyes using biosynthesized Ag@Fe 3O 4 nanocomposite. Bioprocess Biosyst Eng 2024; 47:75-90. [PMID: 38081951 DOI: 10.1007/s00449-023-02946-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 11/09/2023] [Indexed: 01/10/2024]
Abstract
A significant waste (e.g., high oil content and pollutants such as heavy metals, dyes, and microbial contaminants) in water is generated during crude oil extraction and industrial processes, which poses environmental challenges. This study explores the potential of Ag@Fe3O4 nanocomposite (NC) biosynthesized using the aqueous leaf extract of Laurus nobilis for the treatment of oily wastewater. The NC was characterized using ultraviolet-visible (UV-Vis) spectrophotometry, Scanning Electron Microscopy (SEM), Fourier Transformed Infrared (FTIR) and X-Ray Diffraction (XRD) spectroscopies. The crystalline structure of the NC was determined to be face-centered cubic with an average size of 42 nm. Ag@Fe3O4 NC exhibited significant degradation (96.8%, 90.1%, and 93.8%) of Rose Bengal (RB), Methylene Blue (MB), and Toluidine Blue (TB), respectively, through a reduction reaction lasting 120 min at a dye concentration of 10 mg/L. The observed reaction kinetics followed a pseudo-first-order model, with rate constants (k-values) of 0.0284 min-1, 0.0189 min-1, and 0.0212 min-1 for RB, MB, and TB, respectively. The fast degradation rate can be attributed to the low band gap (1.9 eV) of Ag@Fe3O4 NC. The NC elicited an impressive effectiveness (99-100%, 98.0%, and 91.8% within 30 min) in removing, under sunlight irradiation, several heavy metals, total petroleum hydrocarbons (TPH), and total suspended solids (TSS) from the oily water samples. Furthermore, Ag@Fe3O4 NC displayed potent antibacterial properties and a good biocompatibility. These findings contribute to the development of efficient and cost-effective methods for wastewater treatment and environmental remediation.
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Affiliation(s)
- Gamil Gamal Hasan
- Department of Process Engineering, Faculty of Technology, El Oued University, 39000, El Oued, Algeria.
- Laboratory of Valorization and Technology of Sahara Resources (VTRS), El Oued University, 39000, El Oued, Algeria.
| | - Salah Eddine Laouini
- Department of Process Engineering, Faculty of Technology, El Oued University, 39000, El Oued, Algeria
- Laboratory of Biotechnology Biomaterials and Condensed Matter, Faculty of Technology, University of El Oued, 39000, El Oued, Algeria
| | - Abdelhamid Khelef
- Laboratory of Valorization and Technology of Sahara Resources (VTRS), El Oued University, 39000, El Oued, Algeria
| | - Hamdi Ali Mohammed
- Department of Process Engineering, Faculty of Technology, El Oued University, 39000, El Oued, Algeria
- Laboratory of Biotechnology Biomaterials and Condensed Matter, Faculty of Technology, University of El Oued, 39000, El Oued, Algeria
| | - Mohammed Althamthami
- Department of Process Engineering, College of Science and Technology, Biskra University, 07000, Biskra, Algeria
| | - Souhaila Meneceur
- Department of Process Engineering, Faculty of Technology, El Oued University, 39000, El Oued, Algeria
| | - Fahad Alharthi
- Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Kingdom of Saudi Arabia
| | - Sohad A Alshareef
- Department of Chemistry, University of Tabuk, 71491, Tabuk, Saudi Arabia
| | - Farid Menaa
- Department of Biomedical and Environmental Engineering (BEE), Fluorotronics, Inc. - California Innovations Corporation, San Diego, CA, 92037, USA.
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Reinforcement of Epoxy Resin by Additives of Amine-Functionalized Graphene Nanosheets. COATINGS 2020. [DOI: 10.3390/coatings11010035] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this study, graphene oxide (GO) nanosheets were modified with an amine functional group to obtain amine-functionalized graphene (AMG) nanosheets and then blended with the aniline curing agent of bisphenol-A (BPA) epoxy resin to crosslink BPA epoxy resin. The AMG-blended curing agent and BPA epoxy resin formed an intermolecular hydrogen bond that was stronger than the π–π stacking force between benzene rings of graphene nanosheets. Therefore, AMG nanosheets exhibited excellent dispersion in the aniline curing agent. The amine group of AMG-blended curing agents and the epoxy functional group of BPA epoxy resin exhibited strong chemical activity and underwent crosslinking and polymerization. AMG nanosheets were mixed with BPA epoxy resin to form a crosslinked structure through the epoxy ring-opening polymerization of the resin. The mechanical properties of the epoxy resin nanocomposites were significantly improved by the added 1 wt.% AMG nanosheets. The tensile strength was enhanced by 98.1% by adding 1 wt.% AMG in epoxy. Furthermore, the impact resistance of the epoxy resin was enhanced by 124.4% after adding 2.67 wt.% of AMG nanosheets. Compared with other reinforced fillers, AMG nanosheets are very light and can therefore be used as nanocomposite materials in coating applications, the automotive industry, aerospace sheet materials, wind power generation, and other fields.
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Optical Properties of Composites Based on Graphene Oxide and Polystyrene. Molecules 2020; 25:molecules25102419. [PMID: 32455917 PMCID: PMC7287870 DOI: 10.3390/molecules25102419] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 05/16/2020] [Accepted: 05/18/2020] [Indexed: 11/17/2022] Open
Abstract
In this work, new optical properties of composites based on polystyrene (PS) microspheres and graphene oxide (GO) are reported. The radical polymerization of styrene in the presence of benzoyl peroxide, pentane and GO induces the appearance of new ester groups in the PS macromolecular chains remarked through an increase in the absorbance of the infrared (IR) band at 1743 cm-1. The decrease in the GO concentration in the PS/GO composites mass from 5 wt.% to 0.5 wt.% induces a diminution in the intensities of the D and G Raman bands of GO simultaneous with a down-shift of the D band from 1351 to 1322 cm-1. These variations correlated with the covalent functionalization of the GO layers with PS. For the first time, the photoluminescent (PL) properties of PS/GO composites are reported. The PS microspheres are characterized by a PL band at 397 nm. Through increasing the GO sheets' concentration in the PS/GO composite mass from 0.5 wt.% to 5 wt.%, a PS PL quenching process is reported. In addition, in the presence of ultraviolet A (UVA) light, a photo-degradation process of the PS/GO composite having the GO concentration equal to 5 wt.% is demonstrated by the PL studies.
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Paraskar P, Bari P, Mishra S. Influence of amine functionalized graphene oxide on mechanical and thermal properties of epoxy matrix composites. IRANIAN POLYMER JOURNAL 2019. [DOI: 10.1007/s13726-019-00772-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Guo L, Yan H, Chen Z, Liu Q, Feng Y, Ding F, Nie Y. Amino Functionalization of Reduced Graphene Oxide/Tungsten Disulfide Hybrids and Their Bismaleimide Composites with Enhanced Mechanical Properties. Polymers (Basel) 2018; 10:polym10111199. [PMID: 30961124 PMCID: PMC6290598 DOI: 10.3390/polym10111199] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 10/23/2018] [Accepted: 10/24/2018] [Indexed: 11/16/2022] Open
Abstract
A novel graphene-based nanocomposite particles (NH₂-rGO/WS₂), composed of reduced graphene oxide (rGO) and tungsten disulfide (WS₂) grafted with active amino groups (NH₂-rGO/WS₂), was successfully synthesized by an effective and facile method. NH₂-rGO/WS₂ nanoparticles were then used to fabricate new bismaleimide (BMI) composites (NH₂-rGO/WS₂/BMI) via a casting method. The results demonstrated that a suitable amount of NH₂-rGO/WS₂ nanoparticles significantly improved the mechanical properties of the BMI resin. When the loading of NH₂-rGO/WS₂ was only 0.6 wt %, the impact and flexural strength of the composites increased by 91.3% and 62.6%, respectively, compared to the neat BMI resin. Rare studies have reported such tremendous enhancements on the mechanical properties of the BMI resin with trace amounts of fillers. This is attributable to the unique layered structure of NH₂-rGO/WS₂ nanoparticles, fine interfacial adhesion, and uniform dispersion of NH₂-rGO/WS₂ in the BMI resin. Besides, the thermal gravimetrical analysis (TGA) revealed that the addition of NH₂-rGO/WS₂ could also improve the stability of the composites.
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Affiliation(s)
- Liulong Guo
- Department of Applied Chemistry, School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi'an 710129, China.
| | - Hongxia Yan
- Department of Applied Chemistry, School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi'an 710129, China.
| | - Zhengyan Chen
- Department of Applied Chemistry, School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi'an 710129, China.
| | - Qi Liu
- Department of Applied Chemistry, School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi'an 710129, China.
| | - Yuanbo Feng
- Department of Applied Chemistry, School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi'an 710129, China.
| | - Fan Ding
- Department of Applied Chemistry, School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi'an 710129, China.
| | - Yufeng Nie
- Department of Applied Mathematics, School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi'an 710129, China.
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Liu Y, Hamon AL, Fan B, He D, Haghi-Ashtiani P, Reiss T, Bai J. Intensive EELS study of epoxy composites reinforced by graphene-based nanofillers. J Appl Polym Sci 2018. [DOI: 10.1002/app.46748] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yu Liu
- Laboratoire Mécanique des Sols Structures et Matériaux (MSSMat), CNRS UMR 8579, CentraleSupélec; Université Paris-Saclay; 3 rue Joliot-Curie, Gif-sur-Yvette Cedex 91192 France
| | - Ann-Lenaig Hamon
- Laboratoire Mécanique des Sols Structures et Matériaux (MSSMat), CNRS UMR 8579, CentraleSupélec; Université Paris-Saclay; 3 rue Joliot-Curie, Gif-sur-Yvette Cedex 91192 France
| | - Benhui Fan
- Laboratoire Mécanique des Sols Structures et Matériaux (MSSMat), CNRS UMR 8579, CentraleSupélec; Université Paris-Saclay; 3 rue Joliot-Curie, Gif-sur-Yvette Cedex 91192 France
| | - Delong He
- Laboratoire Mécanique des Sols Structures et Matériaux (MSSMat), CNRS UMR 8579, CentraleSupélec; Université Paris-Saclay; 3 rue Joliot-Curie, Gif-sur-Yvette Cedex 91192 France
| | - Paul Haghi-Ashtiani
- Laboratoire Mécanique des Sols Structures et Matériaux (MSSMat), CNRS UMR 8579, CentraleSupélec; Université Paris-Saclay; 3 rue Joliot-Curie, Gif-sur-Yvette Cedex 91192 France
| | - Thomas Reiss
- Laboratoire Mécanique des Sols Structures et Matériaux (MSSMat), CNRS UMR 8579, CentraleSupélec; Université Paris-Saclay; 3 rue Joliot-Curie, Gif-sur-Yvette Cedex 91192 France
| | - Jinbo Bai
- Laboratoire Mécanique des Sols Structures et Matériaux (MSSMat), CNRS UMR 8579, CentraleSupélec; Université Paris-Saclay; 3 rue Joliot-Curie, Gif-sur-Yvette Cedex 91192 France
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