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Jin B, Dolocan A, Liu C, Cui Z, Manthiram A. Regulating Anode-Electrolyte Interphasial Reactions by Zwitterionic Binder Chemistry in Lithium-Ion Batteries with High-Nickel Layered Oxide Cathodes and Silicon-Graphite Anodes. Angew Chem Int Ed Engl 2024; 63:e202408021. [PMID: 39019796 DOI: 10.1002/anie.202408021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2024] [Revised: 06/19/2024] [Accepted: 07/16/2024] [Indexed: 07/19/2024]
Abstract
The practical application of silicon (Si)-based anodes faces challenges due to severe structural and interphasial degradations. These challenges are exacerbated in lithium-ion batteries (LIBs) employing Si-based anodes with high-nickel layered oxide cathodes, as significant transition-metal crossover catalyzes serious parasitic side reactions, leading to faster cell failure. While enhancing the mechanical properties of polymer binders has been acknowledged as an effective means of improving solid-electrolyte interphase (SEI) stability on Si-based anodes, an in-depth understanding of how the binder chemistry influences the SEI is lacking. Herein, a zwitterionic binder with an ability to manipulate the chemical composition and spatial distribution of the SEI layer is designed for Si-based anodes. It is evidenced that the electrically charged microenvironment created by the zwitterionic species alters the solvation environment on the Si-based anode, featuring rich anions and weakened Li+-solvent interactions. Such a binder-regulated solvation environment induces a thin, uniform, robust SEI on Si-based anodes, which is found to be the key to withstanding transition-metal deposition and minimizing their detrimental impact on catalyzing electrolyte decomposition and devitalizing bulk Si. As a result, albeit possessing comparable mechanical properties to those of commercial binders, the zwitterionic binder enables superior cycling performances in high-energy-density LIBs under demanding operating conditions.
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Affiliation(s)
- Biyu Jin
- Materials Science and Engineering Program and Texas Materials Institute, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - Andrei Dolocan
- Materials Science and Engineering Program and Texas Materials Institute, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - Chen Liu
- Materials Science and Engineering Program and Texas Materials Institute, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - Zehao Cui
- Materials Science and Engineering Program and Texas Materials Institute, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - Arumugam Manthiram
- Materials Science and Engineering Program and Texas Materials Institute, The University of Texas at Austin, Austin, Texas, 78712, USA
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2
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Turhan E, Goldberga I, Pötzl C, Keil W, Guigner JM, Haßler MFT, Peterlik H, Azaïs T, Kurzbach D. Branched Polymeric Prenucleation Assemblies Initiate Calcium Phosphate Precipitation. J Am Chem Soc 2024; 146:25614-25624. [PMID: 39228133 PMCID: PMC11421018 DOI: 10.1021/jacs.4c07325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/05/2024]
Abstract
The formation of crystalline calcium phosphate (CaP) has recently gained ample attention as it does not follow the classic nucleation-and-growth mechanism of solid formation. Instead, the precipitation mechanisms can involve numerous intermediates, including soluble prenucleation species. However, structural features, stability, and transformation of such solution-state precursors remain largely undisclosed. Herein, we report a detailed and comprehensive characterization of the sequential events involved in calcium phosphate crystallization starting from the very early prenucleation stage. We integrated an extensive set of time-resolved methods, including NMR, turbidimetry, SAXS, cryo-TEM, and calcium-potentiometry to show that CaP nucleation is initiated by the transformation of "branched" polymeric prenucleation assemblies into amorphous calcium phosphate spheres. Such a mineralization process starts with the spontaneous formation of so-called nanometric prenucleation clusters (PNCs) that later assemble into those branched polymeric assemblies without calcium ion uptake from the solution. Importantly, the branched macromolecular species are invisible to many techniques (NMR, turbidity, calcium-potentiometry) but can readily be evidenced by time-resolved SAXS. We find that these polymeric assemblies constitute the origin of amorphous calcium phosphate (ACP) precipitation through an unexpected process: spontaneous dissolution is followed by local densification of 100-200 nm wide domains leading to ACP spheres of similar size. Finally, we demonstrate that the timing of the successive events involved in the CaP mineralization pathway can be kinetically controlled by the Ca2+/Pi molar ratio, such that the lifetime of the soluble transient species can be increased up to hours when decreasing it.
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Affiliation(s)
- Ertan Turhan
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, Vienna 1090, Austria
- Vienna Doctoral School in Chemistry (DoSChem), University of Vienna, Währinger Str. 42, Vienna 1090, Austria
| | - Ieva Goldberga
- CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Sorbonne Université, 4, Place Jussieu, Paris F-75005, France
| | - Christopher Pötzl
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, Vienna 1090, Austria
- Vienna Doctoral School in Chemistry (DoSChem), University of Vienna, Währinger Str. 42, Vienna 1090, Austria
| | - Waldemar Keil
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, Vienna 1090, Austria
| | - Jean-Michel Guigner
- Institut de Minéralogie et Physique des Milieux Condensés (IMPMC), Sorbonne Université, 4, Place Jussieu, Paris F-75005, France
| | - Martin F T Haßler
- Faculty of Physics, University of Vienna, Boltzmanngasse 5, Vienna 1090, Austria
- Vienna Doctoral School in Physics (VDS), University of Vienna, Boltzmanngasse 5, Vienna 1090, Austria
| | - Herwig Peterlik
- Faculty of Physics, University of Vienna, Boltzmanngasse 5, Vienna 1090, Austria
| | - Thierry Azaïs
- CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Sorbonne Université, 4, Place Jussieu, Paris F-75005, France
| | - Dennis Kurzbach
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, Vienna 1090, Austria
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3
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Mureşan-Pop M, Simon S, Bodoki E, Simon V, Turza A, Todea M, Vulpoi A, Magyari K, Iacob BC, Bărăian AI, Gołdyn M, Gomes CSB, Susana M, Duarte MT, André V. Mechanochemical Synthesis of New Praziquantel Cocrystals: Solid-State Characterization and Solubility. CRYSTAL GROWTH & DESIGN 2024; 24:4668-4681. [PMID: 38855579 PMCID: PMC11157481 DOI: 10.1021/acs.cgd.4c00296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/29/2024] [Accepted: 05/02/2024] [Indexed: 06/11/2024]
Abstract
New cocrystals of praziquantel with suberic, 3-hydroxybenzoic, benzene-1,2,4,5-tetracarboxylic, trimesic, and 5-hydroxyisophthalic acids were obtained through ball milling experiments. The optimal conditions for the milling process were chosen by changing the solvent volume and the mechanical action time. Supramolecular interactions in the new cocrystals are detailed based on single-crystal X-ray diffraction analysis, confirming the expected formation of hydrogen bonds between the praziquantel carbonyl group and the carboxyl (or hydroxyl) moieties of the coformers. Different structural characterization techniques were performed for all samples, but the praziquantel:suberic acid cocrystal includes a wider range of investigations such as thermal analysis, infrared and X-ray photoelectron spectroscopies, and SEM microscopy. The stability for up to five months was established by keeping it under extreme conditions of temperature and humidity. Solubility studies were carried out for all the new forms disclosed herein and compared with the promising cocrystals previously reported with salicylic, 4-aminosalicylic, vanillic, and oxalic acids. HPLC analyses revealed a higher solubility for most of the new cocrystal forms, as compared to pure praziquantel.
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Affiliation(s)
- Marieta Mureşan-Pop
- Nanostructured
Materials and Bio-Nano Interfaces Department, Interdisciplinary Research
Institute on Bio-Nano-Sciences, Babes-Bolyai
University, 42, Treboniu
Laurian, Cluj-Napoca 400271, Romania
- INSPIRE
Research Platform, Babes-Bolyai University, 11, Arany Janos, Cluj-Napoca 400028, Romania
| | - Simion Simon
- Nanostructured
Materials and Bio-Nano Interfaces Department, Interdisciplinary Research
Institute on Bio-Nano-Sciences, Babes-Bolyai
University, 42, Treboniu
Laurian, Cluj-Napoca 400271, Romania
- INSPIRE
Research Platform, Babes-Bolyai University, 11, Arany Janos, Cluj-Napoca 400028, Romania
| | - Ede Bodoki
- Analytical
Chemistry Department, Faculty of Pharmacy, Iuliu Haţieganu University of Medicine and Pharmacy, 4, Louis Pasteur, Cluj-Napoca 400349, Romania
| | - Viorica Simon
- Nanostructured
Materials and Bio-Nano Interfaces Department, Interdisciplinary Research
Institute on Bio-Nano-Sciences, Babes-Bolyai
University, 42, Treboniu
Laurian, Cluj-Napoca 400271, Romania
| | - Alexandru Turza
- Mass
Spectrometry, Chromatography and Applied Physics Department, National Institute for Research and Development of
Isotopic and Molecular Technologies, Cluj-Napoca 400293, Romania
| | - Milica Todea
- Nanostructured
Materials and Bio-Nano Interfaces Department, Interdisciplinary Research
Institute on Bio-Nano-Sciences, Babes-Bolyai
University, 42, Treboniu
Laurian, Cluj-Napoca 400271, Romania
- INSPIRE
Research Platform, Babes-Bolyai University, 11, Arany Janos, Cluj-Napoca 400028, Romania
- Molecular
Sciences Department, Faculty of Medicine, Iuliu Haţieganu University of Medicine and Pharmacy, 4, Louis Pasteur, Cluj-Napoca 400349, Romania
| | - Adriana Vulpoi
- Nanostructured
Materials and Bio-Nano Interfaces Department, Interdisciplinary Research
Institute on Bio-Nano-Sciences, Babes-Bolyai
University, 42, Treboniu
Laurian, Cluj-Napoca 400271, Romania
- INSPIRE
Research Platform, Babes-Bolyai University, 11, Arany Janos, Cluj-Napoca 400028, Romania
| | - Klara Magyari
- Nanostructured
Materials and Bio-Nano Interfaces Department, Interdisciplinary Research
Institute on Bio-Nano-Sciences, Babes-Bolyai
University, 42, Treboniu
Laurian, Cluj-Napoca 400271, Romania
| | - Bogdan C. Iacob
- Analytical
Chemistry Department, Faculty of Pharmacy, Iuliu Haţieganu University of Medicine and Pharmacy, 4, Louis Pasteur, Cluj-Napoca 400349, Romania
| | - Alexandra Iulia Bărăian
- Analytical
Chemistry Department, Faculty of Pharmacy, Iuliu Haţieganu University of Medicine and Pharmacy, 4, Louis Pasteur, Cluj-Napoca 400349, Romania
| | - Mateusz Gołdyn
- Faculty of
Chemistry, Adam Mickiewicz University in
Poznań, Uniwersytetu
Poznańskiego 8, Poznań 61-614, Poland
- Center
for Advanced Technology, Adam Mickiewicz
University in Poznań, Uniwersytetu Poznańskiego 10, Poznań 61-614, Poland
| | - Clara S. B. Gomes
- LAQV-REQUIMTE,
Department of Chemistry, NOVA School of Science and Technology (NOVA
FCT), NOVA University of Lisbon, Caparica 2829-516, Portugal
| | - Margarida Susana
- Centro
de Química Estrutural, Institute of Molecular Sciences, Instituto Superior Técnico, Universidade de
Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal
| | - M. Teresa Duarte
- Centro
de Química Estrutural, Institute of Molecular Sciences, Instituto Superior Técnico, Universidade de
Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal
| | - Vânia André
- Centro
de Química Estrutural, Institute of Molecular Sciences, Instituto Superior Técnico, Universidade de
Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal
- Associação
do Instituto Superior Técnico para a Investigação
e Desenvolvimento (IST-ID), Avenida António José de Almeida, 12, Lisboa 1000-043, Portugal
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Yuan Z, Liu M, Su Z, Xu H, Liu C, Lu L, Wang L, Zhu X, Zhang Y, Rao Y. Designing a cercosporin-bioinspired bifunctional algicide with flocculation and photocatalysis for efficiently controlling harmful cyanobacterial blooms. JOURNAL OF HAZARDOUS MATERIALS 2023; 459:132110. [PMID: 37487335 DOI: 10.1016/j.jhazmat.2023.132110] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/29/2023] [Accepted: 07/19/2023] [Indexed: 07/26/2023]
Abstract
Harmful cyanobacterial blooms (HCBs) are spreading in freshwater ecosystems worldwide, adversely affecting drinking water supplies, aquatic production, recreational and tourism activities. Therefore, the efficient and environmentally friendly method is still of interest to be developed to effectively control HCBs. Inspired by the excellent algicidal activity of cercosporin (CP), a novel metal-free algaecide SiO2@EDU@CP (EDU, N-ethyl-N'-(3-dimethylaminopropyl)urea) with flocculation and photoremoval functions, was successfully designed and prepared in one-step to simultaneously introduce CP and EDU on SiO2 nanoparticles. It could rapidly form algae flocs in 20 min with 97.1% flocculation rate, and remove Microcystis aeruginosa within 12 h with 91.0% algicidal rate under 23 W compact fluorescent light irradiation without any leaked CP detected. Additionally, odorant β-cyclocitral and toxin microcystin-LR were both photodegraded after treatment of SiO2@EDU@CP. Further mechanistic studies showed that the introduction of EDU significantly reversed the zeta potential of SiO2-COOH to achieve the flocculation through neutral charge, and the photophysical characterization of SiO2@EDU@CP revealed the improved charge separation ability to generate reactive oxygen species. More importantly, the utility of SiO2@EDU@CP was well demonstrated by its effectiveness for algae from Taihu Lake under natural sunlight and inability to regrow after treatment. This study not only establishes a bifunctional algicide SiO2@EDU@CP to efficiently control HCBs, but also provides design possibilities to develop more novel and efficient algicides for the better control of practical HCBs.
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Affiliation(s)
- Zhenbo Yuan
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, PR China
| | - Meiling Liu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, PR China
| | - Zengping Su
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, PR China
| | - Huibin Xu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, PR China
| | - Changmei Liu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, PR China
| | - Liushen Lu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, PR China
| | - Lingling Wang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, PR China
| | - Xiaonan Zhu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, PR China
| | - Yan Zhang
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, PR China
| | - Yijian Rao
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, PR China.
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5
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Zhang Z, Yan D, Liu X, Li W, Wang Z, Wang Y, Song D, Zhang T, Liu J, Wang J. Self-healing nanocomposite coatings containing organic-inorganic inhibitors functionalized dendritic silica nanocontainers for synergistic corrosion protection of carbon steel. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2022.130430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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6
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Zhang L, Tu X, Han W, Chen L, Chen Y, Zheng H. The Efficient CO2 Fixation Catalyzed by Fe-Based Catalyst for Synthesizing Benzimidazoles. Catal Letters 2022. [DOI: 10.1007/s10562-022-04220-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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7
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Low-Temperature and UV Irradiation Effect on Transformation of Zirconia -MPS nBBs-Based Gels into Hybrid Transparent Dielectric Thin Films. Gels 2022; 8:gels8020068. [PMID: 35200450 PMCID: PMC8870923 DOI: 10.3390/gels8020068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/14/2022] [Accepted: 01/17/2022] [Indexed: 12/10/2022] Open
Abstract
Bottom-up approaches in solutions enable the low-temperature preparation of hybrid thin films suitable for printable transparent and flexible electronic devices. We report the obtainment of new transparent PMMA/ZrO2 nanostructured -building blocks (nBBs) hybrid thin films (61–75 nm) by a modified sol-gel method using zirconium ethoxide, Zr(OEt)4, and 3-methacryloxypropyl trimethoxysilane (MPS) as a coupling agent and methylmethacrylate monomer (MMA). The effect of low-temperature and UV irradiation on the nBBs gel films is discussed. The thermal behaviors of the hybrid sols and as-deposed gel films were investigated by modulated thermogravimetric (mTG) and differential scanning calorimetry (DSC) analysis. The chemical structure of the resulted films was elucidated by X-ray photoelectron (XPS), infrared (IR) and Raman spectroscopies. Their morphology and crystalline structure were observed by scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), and grazing incidence X-ray diffraction. The cured films show zirconia nanocrystallites of 2–4 nm in the hybrid matrix and different self-assembled structures for 160 °C or UV treatment; excellent dielectric behavior, with dielectric constant values within 6.7–17.9, depending on the Zr(OEt)4:MMA molar ratio, were obtained.
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8
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Molero G, Tsai C, Liu C, Sue H, Uenuma S, Mayumi K, Ito K. Mechanical and scratch behaviors of
polyrotaxane‐modified
poly(methyl methacrylate). J Appl Polym Sci 2021. [DOI: 10.1002/app.51237] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Glendimar Molero
- Department of Materials Science and Engineering Polymer Technology Center, Texas A&M University College Station Texas USA
| | - Chia‐Ying Tsai
- Department of Materials Science and Engineering Polymer Technology Center, Texas A&M University College Station Texas USA
| | - Cong Liu
- Department of Materials Science and Engineering Polymer Technology Center, Texas A&M University College Station Texas USA
| | - Hung‐Jue Sue
- Department of Materials Science and Engineering Polymer Technology Center, Texas A&M University College Station Texas USA
| | - Shuntaro Uenuma
- Department of Advanced Materials Science, Graduate School of Frontier Sciences The University of Tokyo Chiba Japan
| | - Koichi Mayumi
- Department of Advanced Materials Science, Graduate School of Frontier Sciences The University of Tokyo Chiba Japan
| | - Kohzo Ito
- Department of Advanced Materials Science, Graduate School of Frontier Sciences The University of Tokyo Chiba Japan
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Gankhuyag S, Bae DS, Lee K, Lee S. One-Pot Synthesis of SiO 2@Ag Mesoporous Nanoparticle Coating for Inhibition of Escherichia coli Bacteria on Various Surfaces. NANOMATERIALS 2021; 11:nano11020549. [PMID: 33671645 PMCID: PMC7926691 DOI: 10.3390/nano11020549] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 02/19/2021] [Accepted: 02/19/2021] [Indexed: 12/25/2022]
Abstract
Silver nanoparticles (Ag NPs) as antibacterial agents are of considerable interest owing to their simplicity, high surface area to volume ratio, and efficient oligodynamic properties. Hence, we investigated the synthesis of silica-supported Ag NPs (SiO2@Ag) as an effective antibacterial agent by using a wet-impregnation method. The formation of SiO2@Ag with Ag NP (5–15 nm diameter) on the silica particle (100–130 nm diameter) was confirmed with transmission electron microscopy (TEM). The study on antibacterial activity was performed in a liquid culture to determine the minimum inhibitory concentration (MIC) against Escherichia coli (E. coli) and Bacillus subtilis (B. subtilis) bacteria. Both bacteria are chosen to understand difference in the effect of Ag NPs against Gram-negative (E. coli) and Gram-positive (B. subtilis) bacteria. SiO2@Ag mesoporous nanoparticles had excellent antibacterial activity against E. coli bacteria and fully restricted the bacterial growth when the material concentration was increased up to 1.00 mg/mL. In addition, the obtained material had good adhesion to both steel and polyethylene substrates and exhibited a high inhibition effect against E. coli bacteria.
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Affiliation(s)
- Sukhbayar Gankhuyag
- Department of Electronic Engineering, Kyung Hee University, Yongin city, Gyeonggi-do 17104, Korea;
| | - Dong Sik Bae
- Department of Convergence Materials Science and Engineering, Changwon National University, Changwon city, Gyeongsangnam-do 51140, Korea;
| | - Kyoung Lee
- Department of Bio Health Science, Changwon National University, Changwon city, Gyeongsangnam-do 51140, Korea;
| | - Seunghyun Lee
- Department of Electronic Engineering, Kyung Hee University, Yongin city, Gyeonggi-do 17104, Korea;
- Correspondence:
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One-step fabrication of robust and durable superamphiphobic, self-cleaning surface for outdoor and in situ application on building substrates. J Colloid Interface Sci 2021; 591:239-252. [PMID: 33601105 DOI: 10.1016/j.jcis.2021.02.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 01/30/2021] [Accepted: 02/01/2021] [Indexed: 11/21/2022]
Abstract
HYPOTHESIS Water and oil inhibition treatment is essential for protecting natural and artificial stone surfaces. Bioinspired super-antiwetting surfaces with "lotus effect", together with superoleophobic properties, can be achieved combining very low-surface-energy materials and suitable surface roughness. Exploiting the natural roughness of stone surfaces, the simple and inexpensive fabrication of superamphiphobic surfaces through the coating dispersion deposition is expected. It seems the ideal method for the safeguard of contemporary and historical constructions, since the physical, chemical and aesthetic properties can be maintained. EXPERIMENTS The new coating agent (3-perfluroether-amidopropylsilane) was synthesized via one-step amidation. Hydrophobicity, robustness and environmental durability were systematically studied on stone surfaces through several tests: contact angle (CA), contact angle hysteresis (CAH), water inhibition efficiency, vapor diffusivity, chemical and mechanical resistance, artificial and field-exposure ageing. FINDINGS The as-prepared coating demonstrated superamphiphobicity (oil and water CA > 150° with CAH < 10°) on stones with low and high porosity. Moreover, it manifested very high water inhibition efficacy while maintaining high vapor diffusivity and aesthetic properties of substrates. The superhydrophobic coating showed good robustness towards corrosive chemical agents, peeling, mechanical abrasion, water immersion and environmental weathering, thereby permitting various outdoor applications, including stone protection in rainy regions where acid rain is also present.
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11
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Horikoshi S, Sawada S, Serpone N. A novel green chemistry gelation method for polyvinyl pyrrolidone (PVP) and dimethylpolysiloxane (silicone): microwave-induced in-liquid-plasma. RSC Adv 2021; 11:24326-24335. [PMID: 35479003 PMCID: PMC9036679 DOI: 10.1039/d1ra03007h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Accepted: 06/21/2021] [Indexed: 11/21/2022] Open
Abstract
The focus of this article rests on our discovery that a water-soluble polymer could be cross-linked to form a gel using a novel Green Chemistry gelation method: the microwave-induced in-liquid-plasma (MILP) method that requires neither a cross-linking agent nor an initiator as are required in the conventional chemical method. For instance, the water-soluble polyvinyl pyrrolidone (PVP) polymer was gelled by MILP plasma irradiation within a few minutes without using toxic cross-linking agents and initiators. As well, the hydrophobic dimethylpolysiloxane macromolecule was dispersed in aqueous media to a colloidal sol, which could then also be easily gelled under MILP irradiation conditions within a few minutes, in comparison to the conventional method that often requires several hours to days for gelation to occur in the presence of cross-linking agents and initiators. The viscosity of the MILP silicone gel was greater than a similar gel formed by the conventional method. In contrast, the viscosity of the MILP-formed PVP gel was lower than the viscosity of the PVP gel obtained from the conventional method. Gels were characterized by 13C-NMR spectrometry, FT-IR spectroscopy, SEM microscopy, viscosity measurements, and dynamic light scattering for particle size distributions. Plausible mechanistic stages for the two gelation occurrences have been inferred as involving the synergistic effects from microwaves, together with the sound waves (cavitation microbubbles), heat, UV and ˙OH radicals resulting from the microwave-generated in-liquid-plasma. The discovery of a water-soluble polymer that cross-links to form a gel using a novel green gelation method: the microwave-induced in-liquid-plasma method that requires neither a cross-linking agent nor an initiator as are required in the conventional chemical method.![]()
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Affiliation(s)
- Satoshi Horikoshi
- Department of Materials and Life Sciences
- Faculty of Science and Technology
- Sophia University
- Tokyo 102-8554
- Japan
| | - Seiya Sawada
- Department of Materials and Life Sciences
- Faculty of Science and Technology
- Sophia University
- Tokyo 102-8554
- Japan
| | - Nick Serpone
- PhotoGreen Laboratory
- Dipartimento di Chimica
- Universita di Pavia
- Pavia 27100
- Italy
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12
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Gonçalves Dias LF, Stamboroski S, Noeske M, Salz D, Rischka K, Pereira R, Mainardi MDC, Cardoso MH, Wiesing M, Bronze-Uhle ES, Esteves Lins RB, Lisboa-Filho PN. New details of assembling bioactive films from dispersions of amphiphilic molecules on titania surfaces. RSC Adv 2020; 10:39854-39869. [PMID: 35558137 PMCID: PMC9088674 DOI: 10.1039/d0ra06511k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 10/22/2020] [Indexed: 12/11/2022] Open
Abstract
Tailoring the surface properties of materials for biomedical applications is important to avoid clinical complications. Forming thin layers of amphiphilic molecules with apolar regions that facilitate attractive intermolecular interactions, can be a suitable and versatile approach to achieve hydrophobic surface modification and provide functional antibacterial properties. Aiming to correlate layer structure and properties starting from film formation, octadecylphosphonic acid (ODPA) and dimethyloctadecyl (3-trimethoxysilylpropyl) ammonium chloride (DMOAP) layers were adsorbed onto smooth titania surfaces. Then the films were studied by atomic force microscopy (AFM) and X-ray Photoelectron Spectroscopy (XPS), and their interactions with aqueous environments were characterized by contact angle and zeta potential measurements. In addition, antibacterial assays were performed using E. coli and S. mutants to reveal the antibacterial properties effected by the surface modification. Immediately after sputter deposition, titania was hydrophilic; however, after air storage and adsorption of DMOAP or ODPA, an increase in the water contact angle was observed. XPS investigations after layer formation and after antibacterial tests revealed that the attachment of layers assembled from ODPA on titania substrates is considerably stronger and more stable than that observed for DMOAP films. Heat treatment strongly affects DMOAP layers. Furthermore, DMOAP layers are not stable under biological conditions. Structure–property relationship of amphiphilic molecules on smooth substrates was explored through a multi-step approach and its influence on biological activity.![]()
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Affiliation(s)
- Leonardo Francisco Gonçalves Dias
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM Bremen Germany .,São Paulo State University - UNESP, School of Science, Department of Physics Brazil
| | - Stephani Stamboroski
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM Bremen Germany .,Institute for Biophysics, University of Bremen Otto-Hahn-Allee 1 28359 Bremen Germany
| | - Michael Noeske
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM Bremen Germany
| | - Dirk Salz
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM Bremen Germany
| | - Klaus Rischka
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM Bremen Germany
| | - Renata Pereira
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM Bremen Germany .,Department of Restorative Dentistry, Operative Dentistry Division, Piracicaba Dental School, University of Campinas (UNICAMP) Avenida Limeira 901 Zip code 13414-903 Piracicaba, SP Brazil
| | - Maria do Carmo Mainardi
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM Bremen Germany .,School of Dentistry, Herminio Ometto University Center Araras SP Brazil
| | - Marina Honorato Cardoso
- Department of Biochemistry, Bauru School of Dentistry, Sao Paulo University - USP Bauru SP Brazil
| | - Martin Wiesing
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM Bremen Germany
| | - Erika Soares Bronze-Uhle
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, Sao Paulo University - USP Bauru SP Brazil
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Chunjaemsri T, Chanlek N, Sukkha U, Nakajima H, Rujirawat S, Yimnirun R, Kidkhunthod P. Synchrotron-based NEXAFS analysis of thermal-treated diamond-like carbon films. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2019.04.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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14
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15
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Kiani S, Jones DR, Alexander S, Barron AR. New insights into the interactions between asphaltene and a low surface energy anionic surfactant under low and high brine salinity. J Colloid Interface Sci 2020; 571:307-317. [PMID: 32208201 DOI: 10.1016/j.jcis.2020.03.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Revised: 03/02/2020] [Accepted: 03/05/2020] [Indexed: 11/25/2022]
Abstract
HYPOTHESIS The hyperbranched chains on the tail of low surface energy surfactants (LSES) causes lowering of surface free energy and rock wettability alteration, offering significant improvement in oil recovery in asphaltene oil reservoirs. EXPERIMENTS Oil sweep efficiency was determined by fluid displacement in pure brine and LSES-brine solutions in a microfluidic pattern that was representative of a sandstone cross-section. Interfacial tension (IFT), wettability alteration, Raman and X-ray photoelectron spectroscopy (XPS) were used to measure the changes of asphaltene interactions with oil-aged substrate after surface treating with brine and surfactant-brine solutions. FINDINGS The hyperbranched LSES yielded a significant increase in the original-oil-in-place (OOIP) recovery (58%) relative to brine flooding (25%), even in the presence of asphaltene. Raman spectra showed the LSES-brine solutions to be capable of causing change to the asphaltene aggregate size after centrifugation treatment.
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Affiliation(s)
- Sajad Kiani
- Energy Safety Research Institute (ESRI), Swansea University, Bay Campus, Swansea SA1 8EN, UK
| | - Daniel R Jones
- Energy Safety Research Institute (ESRI), Swansea University, Bay Campus, Swansea SA1 8EN, UK
| | - Shirin Alexander
- Energy Safety Research Institute (ESRI), Swansea University, Bay Campus, Swansea SA1 8EN, UK.
| | - Andrew R Barron
- Energy Safety Research Institute (ESRI), Swansea University, Bay Campus, Swansea SA1 8EN, UK; Department of Chemistry, Rice University, Houston, TX 77005, USA; Environmental Engineering, Faculty of Engineering, Universiti Teknologi Brunei, Brunei Darussalam.
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PMMA-silica nanocomposite coating: Effective corrosion protection and biocompatibility for a Ti6Al4V alloy. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 110:110713. [DOI: 10.1016/j.msec.2020.110713] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 12/30/2019] [Accepted: 01/30/2020] [Indexed: 12/31/2022]
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17
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Rodič P, Korošec RC, Kapun B, Mertelj A, Milošev I. Acrylate-Based Hybrid Sol-Gel Coating for Corrosion Protection of AA7075-T6 in Aircraft Applications: The Effect of Copolymerization Time. Polymers (Basel) 2020; 12:E948. [PMID: 32325797 PMCID: PMC7240561 DOI: 10.3390/polym12040948] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 04/14/2020] [Accepted: 04/15/2020] [Indexed: 11/28/2022] Open
Abstract
Pre-hydrolysed/condensed tetraethyl orthosilicate (TEOS) was added to a solution of methyl methacrylate (MMA) and 3-methacryloxypropyltrimethoxysilane (MAPTMS), and then copolymerised for various times to study the influence of the latter on the structure of hybrid sol-gel coatings as corrosion protection of aluminium alloy 7075-T6. The reactions taking place during preparation were characterised using real-time Fourier transform infrared spectroscopy, dynamic light scattering and gel permeation chromatography. The solution characteristics were evaluated, using viscosimetry, followed by measurements of thermal stability determined by thermogravimetric analysis. The optimal temperature for the condensation reaction was determined with the help of high-pressure differential scanning calorimetry. Once deposited on 7075-T6 substrates, the coatings were evaluated using a field emission scanning electron microscope coupled to an energy dispersive spectrometer to determine surface morphology, topography, composition and coating thickness. Corrosion properties were tested in dilute Harrison's solution (3.5 g/L (NH4)2SO4 and 0.5 g/L NaCl) using electrochemical impedance spectroscopy. The copolymerization of MMA and MAPTMS over 4 h was optimal for obtaining 1.4 µm thick coating with superior barrier protection against corrosion attack (Z10 mHz 1 GΩ cm2) during three months of exposure to the corrosive medium.
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Affiliation(s)
- Peter Rodič
- Department of Physical and Organic Chemistry, Jožef Stefan Institute, Jamova c. 39, SI-1000 Ljubljana, Slovenia; (B.K.); (I.M.)
| | - Romana Cerc Korošec
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia;
| | - Barbara Kapun
- Department of Physical and Organic Chemistry, Jožef Stefan Institute, Jamova c. 39, SI-1000 Ljubljana, Slovenia; (B.K.); (I.M.)
| | - Alenka Mertelj
- Department of Complex Matter, Jožef Stefan Institute, Jamova c. 39, SI-1000 Ljubljana, Slovenia;
| | - Ingrid Milošev
- Department of Physical and Organic Chemistry, Jožef Stefan Institute, Jamova c. 39, SI-1000 Ljubljana, Slovenia; (B.K.); (I.M.)
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18
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de Campos AFP, Ferreira ARO, da Silva LL, Neto PPM, Cardoso D. Synthesis and properties of hybrid silicas containing alkylammonium surfactants. Catal Today 2020. [DOI: 10.1016/j.cattod.2018.10.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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19
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The Effect of the Methyl and Ethyl Group of the Acrylate Precursor in Hybrid Silane Coatings Used for Corrosion Protection of Aluminium Alloy 7075-T6. COATINGS 2020. [DOI: 10.3390/coatings10020172] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study investigated polysiloxane hybrid sol-gel coatings synthesized from tetraethyl orthosilicate (TEOS), 3-(trimethoxysilyl)propyl methacrylate (MAPTMS) and two different precursors, i.e., methyl- or ethyl- methacrylate (MMA or EMA), as corrosion protection of aluminium alloy 7075-T6. The hypothesis was that the additional alkyl group might affect the chemical properties and, consequently, the corrosion properties. Synthesis of the sols proceeded in two steps, each involving either MMA or EMA in the same molar ratio. The resulting sols, siloxane-(poly(methyl methacrylate-co-MAPTMS)) or siloxane-(poly(ethyl methacrylate-co-MAPTMS)), were applied on aluminium alloy followed by characterization in terms of chemical structure and composition, topography, wettability, adhesion and corrosion resistance in 0.1 M sodium chloride solution. The chemical properties of sols, monoliths and coatings were investigated using Fourier transform infrared spectrometry, solid state nuclear magnetic resonance spectrometry, X-ray photoelectron spectroscopy and time-of-flight secondary ion mass spectrometry. Coatings were similar in terms of surface topography, while the wettability of the coating with EMA showed 6° greater water contact angle compared to the coating with MMA. Both coatings were shown, by electrochemical impedance spectroscopy in 0.1 M NaCl solution, to act as barriers to protect the underlying substrate in which coating with EMA exhibits better protection properties after 2 months of immersion. Adhesion tests confirmed the highest grade of adhesion to the substrate for both coatings. Testing in a salt-spray chamber demonstrated excellent corrosion protection, where coatings remaining intact after more than 600 h of exposure.
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20
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Reinheimer T, Azmi R, Binder JR. Polymerizable Ceramic Ink System for Thin Inkjet-Printed Dielectric Layers. ACS APPLIED MATERIALS & INTERFACES 2020; 12:2974-2982. [PMID: 31845575 DOI: 10.1021/acsami.9b18610] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
An innovative ceramic ink system for thin inkjet-printed dielectric layers is presented, with which it is possible to avoid undesired drying effects. This system contains surface-modified Ba0.6Sr0.4TiO3 (BST) particles, a cross-linking agent, and a thermal radical initiator. The polymerization starts immediately after the ink drop contacts the heated substrate and therefore leads to very homogeneous topographies. Since an organic/inorganic composite ink is used, no sintering is needed after printing and thus printing on flexible substrates is possible. A comparison of the printing and drying behavior between modified and nonmodified BST with the described ink system is performed. The successful surface modification is confirmed via X-ray photoelectron spectroscopy (XPS). Topographies of different printed structures are compared by white light interferometry, the occurring polymerization is confirmed by measurements with an oscillatory rheometer, layer thicknesses are determined by scanning electron microscopy (SEM) images, and the capacitance of a printed capacitor is measured via impedance spectroscopy. It is successfully shown that the developed ink system enables the production of thin ceramic layers (<1 μm) with very homogeneous topographies since undesired drying effects can be avoided. The printed dielectric layers on flexible substrates have a high ceramic content and a high permittivity of 40.
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Affiliation(s)
- Timo Reinheimer
- Institute for Applied Materials , Karlsruhe Institute of Technology , Hermann-von-Helmholtz-Platz 1 , 76344 Eggenstein-Leopoldshafen , Germany
| | - Raheleh Azmi
- Institute for Applied Materials , Karlsruhe Institute of Technology , Hermann-von-Helmholtz-Platz 1 , 76344 Eggenstein-Leopoldshafen , Germany
| | - Joachim R Binder
- Institute for Applied Materials , Karlsruhe Institute of Technology , Hermann-von-Helmholtz-Platz 1 , 76344 Eggenstein-Leopoldshafen , Germany
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21
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Trentin A, Harb SV, Uvida MC, Pulcinelli SH, Santilli CV, Marcoen K, Pletincx S, Terryn H, Hauffman T, Hammer P. Dual Role of Lithium on the Structure and Self-Healing Ability of PMMA-Silica Coatings on AA7075 Alloy. ACS APPLIED MATERIALS & INTERFACES 2019; 11:40629-40641. [PMID: 31589404 DOI: 10.1016/j.corsci.2021.109581] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In this work, structural and active corrosion inhibition effects induced by lithium ion addition in organic-inorganic coatings based on poly(methyl methacrylate) (PMMA)-silica sol-gel coatings have been investigated. The addition of increasing amounts of lithium carbonate (0, 500, 1000, and 2000 ppm), yielded homogeneous hybrid coatings with increased connectivity of nanometric silica cross-link nodes, covalently linked to the PMMA matrix, and improved adhesion to the aluminum substrate (AA7075). Electrochemical impedance spectroscopy (EIS), performed in 3.5% NaCl aqueous solution, showed that the improved structural properties of coatings with higher lithium loadings result in an increased corrosion resistance, with an impedance modulus up to 50 GΩ cm2, and revealed that the lithium induced self-healing ability significantly improves their durability. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) and X-ray photoelectron spectroscopy (XPS) suggest that the regeneration process occurs by means of lithium ions leaching from the adjacent coating toward the corrosion spot, which is restored by a protective layer of precipitated Li rich aluminum hydroxide species. An analogue mechanism has been proposed for artificially scratched coatings presenting an increase of the impedance modulus after salt spray test compared to the lithium free coating. These results evidence the active role of lithium ions in improving the passive barrier of the PMMA-silica coating and in providing through the self-restoring ability a significantly extended service life of AA7075 alloy exposed to saline environment.
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Affiliation(s)
- Andressa Trentin
- São Paulo State University (UNESP) , Institute of Chemistry , 14800-060 Araraquara , São Paulo , Brazil
| | - Samarah V Harb
- São Paulo State University (UNESP) , Institute of Chemistry , 14800-060 Araraquara , São Paulo , Brazil
| | - Mayara C Uvida
- São Paulo State University (UNESP) , Institute of Chemistry , 14800-060 Araraquara , São Paulo , Brazil
| | - Sandra H Pulcinelli
- São Paulo State University (UNESP) , Institute of Chemistry , 14800-060 Araraquara , São Paulo , Brazil
| | - Celso V Santilli
- São Paulo State University (UNESP) , Institute of Chemistry , 14800-060 Araraquara , São Paulo , Brazil
| | - Kristof Marcoen
- Vrije Universiteit Brussel , Department of Materials and Chemistry, Research Group of Electrochemical and Surface Engineering , Pleinlaan 2 , 1050 Brussels , Belgium
| | - Sven Pletincx
- Vrije Universiteit Brussel , Department of Materials and Chemistry, Research Group of Electrochemical and Surface Engineering , Pleinlaan 2 , 1050 Brussels , Belgium
| | - Herman Terryn
- Vrije Universiteit Brussel , Department of Materials and Chemistry, Research Group of Electrochemical and Surface Engineering , Pleinlaan 2 , 1050 Brussels , Belgium
| | - Tom Hauffman
- Vrije Universiteit Brussel , Department of Materials and Chemistry, Research Group of Electrochemical and Surface Engineering , Pleinlaan 2 , 1050 Brussels , Belgium
| | - Peter Hammer
- São Paulo State University (UNESP) , Institute of Chemistry , 14800-060 Araraquara , São Paulo , Brazil
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22
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Trentin A, Harb SV, Uvida MC, Pulcinelli SH, Santilli CV, Marcoen K, Pletincx S, Terryn H, Hauffman T, Hammer P. Dual Role of Lithium on the Structure and Self-Healing Ability of PMMA-Silica Coatings on AA7075 Alloy. ACS APPLIED MATERIALS & INTERFACES 2019; 11:40629-40641. [PMID: 31589404 DOI: 10.1021/acsami.9b13839] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this work, structural and active corrosion inhibition effects induced by lithium ion addition in organic-inorganic coatings based on poly(methyl methacrylate) (PMMA)-silica sol-gel coatings have been investigated. The addition of increasing amounts of lithium carbonate (0, 500, 1000, and 2000 ppm), yielded homogeneous hybrid coatings with increased connectivity of nanometric silica cross-link nodes, covalently linked to the PMMA matrix, and improved adhesion to the aluminum substrate (AA7075). Electrochemical impedance spectroscopy (EIS), performed in 3.5% NaCl aqueous solution, showed that the improved structural properties of coatings with higher lithium loadings result in an increased corrosion resistance, with an impedance modulus up to 50 GΩ cm2, and revealed that the lithium induced self-healing ability significantly improves their durability. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) and X-ray photoelectron spectroscopy (XPS) suggest that the regeneration process occurs by means of lithium ions leaching from the adjacent coating toward the corrosion spot, which is restored by a protective layer of precipitated Li rich aluminum hydroxide species. An analogue mechanism has been proposed for artificially scratched coatings presenting an increase of the impedance modulus after salt spray test compared to the lithium free coating. These results evidence the active role of lithium ions in improving the passive barrier of the PMMA-silica coating and in providing through the self-restoring ability a significantly extended service life of AA7075 alloy exposed to saline environment.
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Affiliation(s)
- Andressa Trentin
- São Paulo State University (UNESP) , Institute of Chemistry , 14800-060 Araraquara , São Paulo , Brazil
| | - Samarah V Harb
- São Paulo State University (UNESP) , Institute of Chemistry , 14800-060 Araraquara , São Paulo , Brazil
| | - Mayara C Uvida
- São Paulo State University (UNESP) , Institute of Chemistry , 14800-060 Araraquara , São Paulo , Brazil
| | - Sandra H Pulcinelli
- São Paulo State University (UNESP) , Institute of Chemistry , 14800-060 Araraquara , São Paulo , Brazil
| | - Celso V Santilli
- São Paulo State University (UNESP) , Institute of Chemistry , 14800-060 Araraquara , São Paulo , Brazil
| | - Kristof Marcoen
- Vrije Universiteit Brussel , Department of Materials and Chemistry, Research Group of Electrochemical and Surface Engineering , Pleinlaan 2 , 1050 Brussels , Belgium
| | - Sven Pletincx
- Vrije Universiteit Brussel , Department of Materials and Chemistry, Research Group of Electrochemical and Surface Engineering , Pleinlaan 2 , 1050 Brussels , Belgium
| | - Herman Terryn
- Vrije Universiteit Brussel , Department of Materials and Chemistry, Research Group of Electrochemical and Surface Engineering , Pleinlaan 2 , 1050 Brussels , Belgium
| | - Tom Hauffman
- Vrije Universiteit Brussel , Department of Materials and Chemistry, Research Group of Electrochemical and Surface Engineering , Pleinlaan 2 , 1050 Brussels , Belgium
| | - Peter Hammer
- São Paulo State University (UNESP) , Institute of Chemistry , 14800-060 Araraquara , São Paulo , Brazil
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23
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Maya-Cornejo J, Rodríguez-Gómez FJ, Molina GA, Galindo-de-la-Rosa J, Ledesma-García J, Hernández-Martínez ÁR, Esparza R, Pérez R, Estévez M. Electrochemical Study of a Hybrid Polymethyl Methacrylate Coating using SiO 2 Nanoparticles toward the Mitigation of the Corrosion in Marine Environments. MATERIALS 2019; 12:ma12193216. [PMID: 31581421 PMCID: PMC6804275 DOI: 10.3390/ma12193216] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 08/24/2019] [Accepted: 08/27/2019] [Indexed: 11/16/2022]
Abstract
The demand for hydrophobic polymer-based protective coatings to impart high corrosion resistance has increased recently. The increase of the hydrophobicity in a hybrid coating is a new challenge, for that reason and in order to protect a metallic surface of oxidant agents, a poly (methyl methacrylate) (PMMA) coating with the addition of a different amount of silicon dioxide (SiO2) was developed. The hybrid coating was applied on a sample of stainless steel AISI 304 by the dip-coating method. The characterization of the coatings was determined by electrochemical impedance spectroscopy and with a scanning electrochemical microscopy. The best coatings were PMMA and PMMA + SiO2 0.01% that exhibits a real impedance in the Nyquist diagram of 760 and 427,800 MΩ⋅cm2, respectively, and the modulus of the real impedance in the Bode diagram present values of 2.2 × 108 and 3.3 × 108 Ω⋅cm2. Moreover, the phase angle presents constant values around 75° to 85° and 85° for the PMMA and PMMA + SiO2 0.01%, respectively. Moreover, the values of the real resistance for the PMMA + SiO2 0.01% coating present values in the order of Mega-ohms despite the coating exhibits an artificial defect in their surface. The contact angle test showed that the hydrophobicity of the hybrid PMMA + SiO2 0.01% coating is higher than that of the pure PMMA coatings. The hybrid PMMA + SiO2 coatings developed in this work are a very interesting and promising area of study in order to develop efficient products to protect metallic surfaces from corrosion phenomenon.
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Affiliation(s)
- José Maya-Cornejo
- Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de Mexico, Boulevard Juriquilla 3001, Santiago de Querétaro 76230, Qro., Mexico.
| | - Francisco J Rodríguez-Gómez
- Departamento de Ingeniería Metalúrgica, Facultad de Química, Universidad Nacional Autónoma de Mexico, Ciudad Universitaria 04510, Mexico D.F., Mexico.
| | - Gustavo A Molina
- Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de Mexico, Boulevard Juriquilla 3001, Santiago de Querétaro 76230, Qro., Mexico.
| | - Juan Galindo-de-la-Rosa
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Pedro Escobedo 76703, Qro., Mexico.
| | - Janet Ledesma-García
- Facultad de Ingeniería, Universidad Autónoma de Querétaro, Centro Universitario Cerro de las Campanas, Santiago de Querétaro 76010, Qro., Mexico.
| | - Ángel R Hernández-Martínez
- Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de Mexico, Boulevard Juriquilla 3001, Santiago de Querétaro 76230, Qro., Mexico.
| | - Rodrigo Esparza
- Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de Mexico, Boulevard Juriquilla 3001, Santiago de Querétaro 76230, Qro., Mexico.
| | - Ramiro Pérez
- Instituto de Ciencias Físicas, Universidad Nacional Autónoma de Mexico, Av. Universidad s/n, Cuernavaca 62210, Mor., Mexico.
| | - Miriam Estévez
- Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de Mexico, Boulevard Juriquilla 3001, Santiago de Querétaro 76230, Qro., Mexico.
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Olajire AA. Recent advances on organic coating system technologies for corrosion protection of offshore metallic structures. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.08.053] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Zapelini IW, Silva LL, Cardoso D. Effect of Hydrothermal Treatment on Structural and Catalytic Properties of [CTA]-MCM-41 Silica. MATERIALS 2018; 11:ma11050860. [PMID: 29883436 PMCID: PMC5978237 DOI: 10.3390/ma11050860] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 05/17/2018] [Accepted: 05/18/2018] [Indexed: 11/30/2022]
Abstract
The [CTA]-MCM-41 hybrid silica is a useful and simply prepared heterogeneous basic catalyst for the transesterification reaction. Here, the effect of hydrothermal treatment during catalyst preparation was investigated, with the aim of improving the structural stability of this catalyst during the reaction. It was observed that the hydrothermal step led to the formation of a material with a higher degree of organization and a greater wall thickness, which improved its structural stability. However, the catalyst prepared using this treatment presented lower catalytic activity, due to the presence of fewer active sites.
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Affiliation(s)
- Iago W Zapelini
- Catalysis Laboratory, Chemical Engineering Department, Federal University of São Carlos, São Carlos 13565-905, SP, Brazil.
| | - Laura L Silva
- Catalysis Laboratory, Chemical Engineering Department, Federal University of São Carlos, São Carlos 13565-905, SP, Brazil.
| | - Dilson Cardoso
- Catalysis Laboratory, Chemical Engineering Department, Federal University of São Carlos, São Carlos 13565-905, SP, Brazil.
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Torrico RF, Harb SV, Trentin A, Uvida MC, Pulcinelli SH, Santilli CV, Hammer P. Structure and properties of epoxy-siloxane-silica nanocomposite coatings for corrosion protection. J Colloid Interface Sci 2018; 513:617-628. [DOI: 10.1016/j.jcis.2017.11.069] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 11/22/2017] [Accepted: 11/23/2017] [Indexed: 11/16/2022]
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Phan TT, Bentiss F, Jama C. Effects of sol–gel process parameters on the anticorrosive performance of phosphosilicate hybrid coatings for carbon steel: structural and electrochemical studies. NEW J CHEM 2018. [DOI: 10.1039/c8nj02450b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effects of several sol–gel process parameters such as acid catalyst addition and the heat treatment procedure on porosity and anticorrosive properties were investigated for phosphosilicate sol–gel hybrid coatings prepared from 3-[(methacryloyloxy)propyl] trimethoxysilane (MEMO) and bis-[2-(methacryloyloxy)ethyl] phosphate (BMEP).
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28
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Harb SV, Pulcinelli SH, Santilli CV, Knowles KM, Hammer P. A Comparative Study on Graphene Oxide and Carbon Nanotube Reinforcement of PMMA-Siloxane-Silica Anticorrosive Coatings. ACS APPLIED MATERIALS & INTERFACES 2016; 8:16339-16350. [PMID: 27266403 DOI: 10.1021/acsami.6b04780] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Carbon nanotubes (CNTs) and graphene oxide (GO) have been used to reinforce PMMA-siloxane-silica nanocomposites considered to be promising candidates for environmentally compliant anticorrosive coatings. The organic-inorganic hybrids were prepared by benzoyl peroxide (BPO)-induced polymerization of methyl methacrylate (MMA) covalently bonded through 3-(trimethoxysilyl)propyl methacrylate (MPTS) to silica domains formed by hydrolytic condensation of tetraethoxysilane (TEOS). Single-walled carbon nanotubes and graphene oxide nanosheets were dispersed by surfactant addition and in a water/ethanol solution, respectively. These were added to PMMA-siloxane-silica hybrids at a carbon (CNT or GO) to silicon (TEOS and MPTS) molar ratio of 0.05% in two different matrices, both prepared at BPO/MMA molar ratios of 0.01 and 0.05. Atomic force microscopy and scanning electron microscopy showed very smooth, homogeneous, and defect-free surfaces of approximately 3-7 μm thick coatings deposited onto A1020 carbon steel by dip coating. Mechanical testing and thermogravimetric analysis confirmed that both additives CNT and GO improved the scratch resistance, adhesion, wear resistance, and thermal stability of PMMA-siloxane-silica coatings. Results of electrochemical impedance spectroscopy in 3.5% NaCl solution, discussed in terms of equivalent circuits, showed that the reinforced hybrid coatings act as a very efficient anticorrosive barrier with an impedance modulus up to 1 GΩ cm(2), approximately 5 orders of magnitude higher than that of bare carbon steel. In the case of GO addition, the high corrosion resistance was maintained for more than 6 months in saline medium. These results suggest that both carbon nanostructures can be used as structural reinforcement agents, improving the thermal and mechanical resistance of high performance anticorrosive PMMA-siloxane-silica coatings and thus extending their application range to abrasive environments.
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Affiliation(s)
- Samarah V Harb
- Instituto de Química, UNESP-Universidade Estadual Paulista , 14800-060 Araraquara/SP, Brazil
| | - Sandra H Pulcinelli
- Instituto de Química, UNESP-Universidade Estadual Paulista , 14800-060 Araraquara/SP, Brazil
| | - Celso V Santilli
- Instituto de Química, UNESP-Universidade Estadual Paulista , 14800-060 Araraquara/SP, Brazil
| | - Kevin M Knowles
- Department of Materials Science and Metallurgy, University of Cambridge , 27 Charles Babbage Road, Cambridge CB3 0FS, England
| | - Peter Hammer
- Instituto de Química, UNESP-Universidade Estadual Paulista , 14800-060 Araraquara/SP, Brazil
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