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Lauermannová AM, Jankovský O, Jiříčková A, Sedmidubský D, Záleská M, Pivák A, Pavlíková M, Pavlík Z. MOC Composites for Construction: Improvement in Water Resistance by Addition of Nanodopants and Polyphenol. Polymers (Basel) 2023; 15:4300. [PMID: 37959979 PMCID: PMC10650835 DOI: 10.3390/polym15214300] [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: 10/13/2023] [Revised: 10/26/2023] [Accepted: 10/30/2023] [Indexed: 11/15/2023] Open
Abstract
The topic of modification of magnesium oxychloride cement (MOC) using specific functional additives is very much pronounced in the research of alternative building materials. This study deals with the co-doping of MOC by 1D and 2D carbon nanomaterials in order to improve its mechanical properties while using tannic acid (TA) as a surfactant. Furthermore, the effect of TA on MOC also improves its water resistance. As a filler, three size fractions of standard quartz sand are used. The proposed types of MOC-based composites show promising results considering their mechanical, macro- and microstructural, chemical, and hygric properties. The use of 1D and 2D nanoadditives and their mixture enables the improvement in the flexural strength and particularly the softening coefficient, which is the durability parameter characterizing the resistance of the prepared materials to water. After immersion in water for 24 h, the compressive strength of all tested specimens of modified composites was higher than that of the reference composite. Quantitatively, the developed co-doped composites show mechanical parameters comparable to or even better than those of commonly used Portland cement-based materials while maintaining high environmental efficiency. This indicates their potential use as an environmentally friendly alternative to Portland cement-based products.
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Affiliation(s)
- Anna-Marie Lauermannová
- Department of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech Republic; (A.-M.L.); (O.J.); (A.J.); (D.S.); (M.Z.)
| | - Ondřej Jankovský
- Department of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech Republic; (A.-M.L.); (O.J.); (A.J.); (D.S.); (M.Z.)
| | - Adéla Jiříčková
- Department of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech Republic; (A.-M.L.); (O.J.); (A.J.); (D.S.); (M.Z.)
| | - David Sedmidubský
- Department of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech Republic; (A.-M.L.); (O.J.); (A.J.); (D.S.); (M.Z.)
| | - Martina Záleská
- Department of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech Republic; (A.-M.L.); (O.J.); (A.J.); (D.S.); (M.Z.)
- Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech Republic; (A.P.); (M.P.)
| | - Adam Pivák
- Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech Republic; (A.P.); (M.P.)
| | - Milena Pavlíková
- Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech Republic; (A.P.); (M.P.)
| | - Zbyšek Pavlík
- Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech Republic; (A.P.); (M.P.)
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Laura EC, Rafael C, Jorge QO, Harvi Alirio CC, Laura Victoria RR, Elisabeth RP. Effects of Molarity and Storage Time of MWCNTs on the Properties of Cement Paste. MATERIALS (BASEL, SWITZERLAND) 2022; 15:9035. [PMID: 36556845 PMCID: PMC9785388 DOI: 10.3390/ma15249035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 09/21/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
Nowadays, nanomaterials in cement pastes are among the most important topics in the cement industry because they can be used for several applications. For this reason, this work presents a study about the influence of changing the molarity of dispersed multiple wall carbon nanotubes (MWCNTs) and varying the number of storage days on the mechanical properties of the cement paste. To achieve this objective, dispersions of 0.35% MWCNTs, varying the molarity of the surfactant as 10 mM, 20 mM, 40 mM, 60 mM, 80 mM, and 100 mM, were performed. The mixture of materials was developed using the sonication process; furthermore, materials were analyzed using UV-Vis, Z-potential, and Raman spectroscopy techniques. Materials with a molarity of 10 mM exhibited the best results, allowing them to also be stored for four weeks. Regarding the mechanical properties, an increase in the elastic modulus was observed when MWCNTs were included in the cement paste for all storage times. The elastic modulus and the maximum stress increased as the storage time increased.
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Affiliation(s)
- Echeverry-Cardona Laura
- Laboratorio de Física del Plasma, Universidad Nacional de Colombia, Sede Manizales, Manizales 170001, Colombia
| | - Cabanzo Rafael
- Laboratorio de Espectroscopía Atómica y Molecular (LEAM), Centro de Materiales y Nanociencias (CMN), Parque Tecnológico Guatiguará, Universidad Industrial de Santander, Bucaramanga 681012, Colombia
| | - Quintero-Orozco Jorge
- Ciencia de Materiales Biológicos y Semiconductores (CIMBIOS), Centro de Materiales y Nanociencias (CMN), Parque Tecnológico Guatiguará, Universidad Industrial de Santander, Bucarmanga 681012, Colombia
| | - Castillo-Cuero Harvi Alirio
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Km 107 Carretera Tijuana Ensenada, Ensenada 22860, Mexico
| | | | - Restrepo-Parra Elisabeth
- Laboratorio de Física del Plasma, Universidad Nacional de Colombia, Sede Manizales, Manizales 170001, Colombia
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Fang Y, Ning W, Li Y, Li F, Pournajaf R, Hamawandi B. The Effects of the Addition of Polyurethane-MgO Nanohybrids on the Mechanical Properties of Ordinary Portland Cement Paste. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3978. [PMID: 36432264 PMCID: PMC9692826 DOI: 10.3390/nano12223978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 11/05/2022] [Accepted: 11/08/2022] [Indexed: 06/16/2023]
Abstract
One of the most important methods of controlling the properties of concrete and cement-based materials is to control the rate and kinetics of cement hydration. In the present study, novel flexible polyurethane-decorated MgO nanohybrids were synthesized using a simple chemical method, added to cement paste in different amounts, and utilized as an effective mechanical performance-enhancing factor for cement paste. It was observed that by adding 3 wt% synthesized PU-MgO nanohybrids to cement paste, its mechanical properties were improved and its compressive strength and flexural strength were increased by up to 13% and 15%, respectively, compared to the plain cement, after 45 days. The effect mechanism of adding PU-MgO nanoparticles on the properties of the cement paste was investigated. The addition of PU-MgO nanohybrids increased the pozzolanic reactions and formed more C-S-H phases.
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Affiliation(s)
- Yu Fang
- College of Urban Construction, Xi’an Siyuan University, Xi’an 710038, China
| | - Weiqing Ning
- College of Urban Construction, Xi’an Siyuan University, Xi’an 710038, China
| | - Yuan Li
- College of Urban Construction, Xi’an Siyuan University, Xi’an 710038, China
| | - Fang Li
- College of Urban Construction, Xi’an Siyuan University, Xi’an 710038, China
| | - Reza Pournajaf
- Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad 85141-43131, Iran
| | - Bejan Hamawandi
- Department of Applied Physics, KTH Royal Institute of Technology, SE-106 91 Stockholm, Sweden
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Interfacial Phenomena at the Interface in the System «Carbon Primary Materials-Water Solutions of Surfactants» for Cement Materials. MATERIALS 2022; 15:ma15020556. [PMID: 35057274 PMCID: PMC8780801 DOI: 10.3390/ma15020556] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/22/2021] [Accepted: 01/04/2022] [Indexed: 01/06/2023]
Abstract
The formation of sustainable concrete is directly relaed to the intensity of the processes occurring at the interface of phases. The study of the surface properties of CNPLUS carbon nanotubes in solutions of various plasticizers was carried out by measuring and calculating adsorption. The applicability of the adsorption value is for forecasting both the efficiency of dispersion and aggregative and sedimentative stability of the obtained dispersion systems. It was stated that two-dimensional pressure arising at the interface of adsorption layers in the dispersive medium with the surfactant Tensafor 2553.2 J/m2 is sufficient to overcome adhesive strength on a small area of the localized contact of carbon nanoparticles CNPLUS, which explains the peptization and stabilization of the particles' surface. It was established that full stabilization of nanoparticles in the aqueous dispersive medium could be ensured only by means of soap-like surfactants, with the compound potassium naphthalene sulfonate (Tensafor). It ensures formation of the micelle-like structure in coagulation layers that forms a structural and mechanical barrier with the external hydrophilic surface. This leads to the increase in the ultimate tensile strength of the concrete grout specimens by 38%.
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Li S, Shen P, Zhou H, Du S, Zhang Y, Yan J. Synergistic effects of CNTs/SiO 2 composite fillers on mechanical properties of cement composites. RSC Adv 2022; 12:27253-27266. [PMID: 36276023 PMCID: PMC9513440 DOI: 10.1039/d2ra04127h] [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: 07/04/2022] [Accepted: 09/19/2022] [Indexed: 11/21/2022] Open
Abstract
This paper investigated the hybridization use of carbon nanotubes (CNTs) with nano-SiO2 in cement composites. The (CNTs)/SiO2 composite fillers were designed and prepared by electrostatic self-assembly technology to reinforce cement composites. The mechanical properties, microstructure and hydration characteristics of cement composites incorporating CNTs/SiO2 fillers were systematically researched. The morphology and optical microscopy results show that the CNTs inside CNTs/SiO2 fillers tended to unwind due to the mechanical separation and steric hindrance of nano-SiO2 particles with certain size, and its agglomeration degree in the suspension greatly alleviated over time. With the appropriate incorporation of CNTs/SiO2 fillers (containing 0.10 wt% CNTs and 0.50 wt% nano-SiO2), the flexural strength, compressive strength and flexural toughness of the cement mortar matrix were sharply increased by 33.5%, 36.5% and 56.0% after curing for 28 days compared to the plain sample, respectively. Microscopic observations show that appropriate nano-additives can densify and refine the hydrated microstructure, and the crack-bridging, debonding and pull-out behaviors of CNTs were all observed. Hydration analysis quantitatively reveals that CNTs/SiO2 fillers significantly accelerated the cement hydration process by virtue of the nano-nucleating action. The reinforcing mechanisms of CNTs/SiO2 fillers can be attributed to the proposed synergistic effects of CNTs/SiO2 fillers, which mainly include the better dispersion stability of CNTs, the nucleating effect of nano-additives and the pozzolanic reaction by nano-SiO2, thus positively leading to increased mechanical properties. CNTs/SiO2 composite fillers are prepared by assembling CNTs with nano-SiO2 paticles. The synergistic reinforcing effects of the prepared CNTs/SiO2 fillers on cement composites were researched.![]()
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Affiliation(s)
- Shaojie Li
- Army Engineering University, Shijiazhuang 050003, China
| | - Ping Shen
- Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Hang Zhou
- Army Engineering University, Shijiazhuang 050003, China
| | - Shiguo Du
- Army Engineering University, Shijiazhuang 050003, China
| | - Yuling Zhang
- Army Engineering University, Shijiazhuang 050003, China
| | - Jun Yan
- Hebei Jiaotong Vocational and Technical College, Shijiazhuang 050003, China
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Malakar A, Kanel SR, Ray C, Snow DD, Nadagouda MN. Nanomaterials in the environment, human exposure pathway, and health effects: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 759:143470. [PMID: 33248790 DOI: 10.1016/j.scitotenv.2020.143470] [Citation(s) in RCA: 76] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 10/24/2020] [Accepted: 10/24/2020] [Indexed: 05/04/2023]
Abstract
Nanomaterials (NMs), both natural and synthetic, are produced, transformed, and exported into our environment daily. Natural NMs annual flux to the environment is around 97% of the total and is significantly higher than synthetic NMs. However, synthetic NMs are considered to have a detrimental effect on the environment. The extensive usage of synthetic NMs in different fields, including chemical, engineering, electronics, and medicine, makes them susceptible to be discharged into the atmosphere, various water sources, soil, and landfill waste. As ever-larger quantities of NMs end up in our environment and start interacting with the biota, it is crucial to understand their behavior under various environmental conditions, their exposure pathway, and their health effects on human beings. This review paper comprises a large portion of the latest research on NMs and the environment. The article describes the natural and synthetic NMs, covering both incidental and engineered NMs and their behavior in the natural environment. The review includes a brief discussion on sampling strategies and various analytical tools to study NMs in complex environmental matrices. The interaction of NMs in natural environments and their pathway to human exposure has been summarized. The potential of NMs to impact human health has been elaborated. The nanotoxicological effect of NMs based on their inherent properties concerning to human health is also reviewed. The knowledge gaps and future research needs on NMs are reported. The findings in this paper will be a resource for researchers working on NMs all over the world to understand better the challenges associated with NMs in the natural environment and their human health effects.
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Affiliation(s)
- Arindam Malakar
- Nebraska Water Center, part of the Robert B. Daugherty Water for Food Global Institute 2021 Transformation Drive, University of Nebraska, Lincoln, NE 68588-0844, USA
| | - Sushil R Kanel
- Nebraska Water Center, part of the Robert B. Daugherty Water for Food Global Institute 2021 Transformation Drive, University of Nebraska, Lincoln, NE 68588-0844, USA; Department of Chemistry, Wright State University, Dayton, OH 45435, USA.
| | - Chittaranjan Ray
- Nebraska Water Center, part of the Robert B. Daugherty Water for Food Global Institute 2021 Transformation Drive, University of Nebraska, Lincoln, NE 68588-0844, USA
| | - Daniel D Snow
- School of Natural Resources and Nebraska Water Center, part of the Robert B. Daugherty Water for Food Global Institute, 202 Water Sciences Laboratory, University of Nebraska, Lincoln, NE 68583-0844, USA
| | - Mallikarjuna N Nadagouda
- Department of Mechanical and Materials Engineering, Wright State University, 3640 Colonel Glenn Hwy., Dayton, OH 45435, USA
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Echeverry-Cardona LM, Álzate N, Restrepo-Parra E, Ospina R, Quintero-Orozco JH. Time-Stability Dispersion of MWCNTs for the Improvement of Mechanical Properties of Portland Cement Specimens. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E4149. [PMID: 32961838 PMCID: PMC7560393 DOI: 10.3390/ma13184149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 09/01/2020] [Accepted: 09/02/2020] [Indexed: 11/26/2022]
Abstract
This study shows the energy optimization and stabilization in the time of solutions composed of H2O + TX-100 + Multi-Wall Carbon Nanotubes (MWCNTs), used to improve the mechanical properties of Portland cement pastes. For developing this research, sonication energies at 90, 190, 290, 340, 390, 440, 490 and 590 J/g are applied to a colloidal substance (MWCNTs/TX-100 + H2O) with a molarity of 10 mM. Raman spectroscopy analyses showed that, for energies greater than 440 J/g, there are ruptures and fragmentation of the MWCNTs; meanwhile at energies below 390 J/g, better dispersions are obtained. The stability of the dispersion over time was evaluated over 13 weeks using UV-vis spectroscopy and Zeta Potential. With the most relevant data collected, sonication energies of 190, 390 and 490 J/g, at 10 mM were selected at the first and the fourth week of storage to obtain Portland cement specimens. Finally, we found an improvement of the mechanical properties of the samples built with Portland cement and solutions stored for one and four weeks; it can be concluded that the MWCNTs improved the hydration period.
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Affiliation(s)
- Laura M. Echeverry-Cardona
- Laboratorio de Física del Plasma, Universidad Nacional de Colombia, Sede Manizales, Manizales 170001, Colombia; (L.M.E.-C.); (N.Á.)
| | - Natalia Álzate
- Laboratorio de Física del Plasma, Universidad Nacional de Colombia, Sede Manizales, Manizales 170001, Colombia; (L.M.E.-C.); (N.Á.)
| | - Elisabeth Restrepo-Parra
- Laboratorio de Física del Plasma, Universidad Nacional de Colombia, Sede Manizales, Manizales 170001, Colombia; (L.M.E.-C.); (N.Á.)
| | - Rogelio Ospina
- Laboratory of Biological Materials Science and Semiconductors, Universidad Industrial de Santander, Bucaramanga 681012, Colombia; (R.O.); (J.H.Q.-O.)
| | - Jorge H. Quintero-Orozco
- Laboratory of Biological Materials Science and Semiconductors, Universidad Industrial de Santander, Bucaramanga 681012, Colombia; (R.O.); (J.H.Q.-O.)
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Effects of Highly Crystalized Nano C-S-H Particles on Performances of Portland Cement Paste and Its Mechanism. CRYSTALS 2020. [DOI: 10.3390/cryst10090816] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
In order to improve the early age strength of ordinary Portland cement-based materials, many early strength agents were applied in different conditions. Different from previous research, the nano calcium silicate hydrate (C-S-H) particles used in this study were synthesized through the chemical reaction of CaO, SiO2, and H2O under 120 °C using the hydrothermal method, and the prepared nano C-S-H particles were highly crystalized. The influences of different amounts of nano C-S-H particles (0%, 0.5%, 1%, 2% and 3% by weight of cement) on the setting time, compressive strength, and hydration heat of cement paste were studied. The hydration products and microstructure of the cement paste with different additions of nano C-S-H particles were investigated through thermogravimetry-differential thermal analysis (TG-DTA), X-ray powder diffraction (XRD), and scanning electron microscope (SEM) tests. The results show that the nano C-S-H particles could be used as an early strength agent, and the early strength of cement paste can be increased by up to 43% through accelerating the hydration of tricalcium silicate (C3S). However, the addition of more than 2% nano C-S-H particles was unfavorable to the later strength development due to more space being left during the initial accelerated hydration process. It is suggested that the suitable content of the nano C-S-H particles is 0.5%−1% by weight of cement.
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Wang Y, Li Y, Zhang Y, Wei W. Enhanced brilliant blue FCF adsorption using microwave-hydrothermal synthesized hydroxyapatite nanoparticles. J DISPER SCI TECHNOL 2019. [DOI: 10.1080/01932691.2019.1623695] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Yan Wang
- Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Jiangsu Engineering Laboratory of Water and Soil Eco-remediation, School of Environment, Nanjing Normal University, Nanjing, China
- Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, China
| | - Yiming Li
- Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Jiangsu Engineering Laboratory of Water and Soil Eco-remediation, School of Environment, Nanjing Normal University, Nanjing, China
- Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, China
| | - Yong Zhang
- Department of Geological Sciences, University of Alabama, Tuscaloosa, AL, USA
| | - Wei Wei
- Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Jiangsu Engineering Laboratory of Water and Soil Eco-remediation, School of Environment, Nanjing Normal University, Nanjing, China
- Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, China
- Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, Shenzhen, China
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