1
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Liu Y, Xia Z, Wang Y, Rozyyev V, Kazi OA, Gao F, Wang D, Lee SS, Koritala R, Wen J, Elam JW, Darling SB. Montmorillonite Membranes with Tunable Ion Transport by Controlling Interlayer Spacing. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 38033202 DOI: 10.1021/acsami.3c13678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
Membranes incorporating two-dimensional (2D) materials have shown great potential for water purification and energy storage and conversion applications. Their ordered interlayer galleries can be modified for their tunable chemical and structural properties. Montmorillonite (MMT) is an earth-abundant phyllosilicate mineral that can be exfoliated into 2D flakes and reassembled into membranes. However, the poor water stability and random interlayer spacing of MMT caused by weak interlamellar interactions pose challenges for practical membrane applications. Herein, we demonstrate a facile approach to fabricating 2D MMT membranes with alkanediamines as cross-linkers. The incorporation of diamine molecules of different lengths enables controllable interlayer spacing and strengthens interlamellar connections, leading to tunable ion transport properties and boosted membrane stability in aqueous environments.
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Affiliation(s)
- Yining Liu
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Advanced Materials for Energy-Water Systems Energy Frontier Research Center, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Zijing Xia
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Advanced Materials for Energy-Water Systems Energy Frontier Research Center, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Yuqin Wang
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Advanced Materials for Energy-Water Systems Energy Frontier Research Center, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Vepa Rozyyev
- Advanced Materials for Energy-Water Systems Energy Frontier Research Center, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
- Applied Materials Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Omar A Kazi
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Advanced Materials for Energy-Water Systems Energy Frontier Research Center, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Feng Gao
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Advanced Materials for Energy-Water Systems Energy Frontier Research Center, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Di Wang
- Chemistry Department, University of Chicago, Chicago, Illinois 60637, United States
| | - Sang Soo Lee
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Rachel Koritala
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Jianguo Wen
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Jeffrey W Elam
- Advanced Materials for Energy-Water Systems Energy Frontier Research Center, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Applied Materials Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Seth B Darling
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Advanced Materials for Energy-Water Systems Energy Frontier Research Center, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
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2
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Shen X, Bourg IC. Interaction between Hydrated Smectite Clay Particles as a Function of Salinity (0-1 M) and Counterion Type (Na, K, Ca). THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:20990-20997. [PMID: 37881773 PMCID: PMC10595998 DOI: 10.1021/acs.jpcc.2c04636] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 11/11/2022] [Indexed: 10/27/2023]
Abstract
Swelling clay minerals control the hydrologic and mechanical properties of many soils, sediments, and sedimentary rocks. This important and well-known phenomenon remains challenging to predict because it emerges from complex multiscale couplings between aqueous chemistry and colloidal interaction mechanics in nanoporous clay assemblages, for which predictive models remain elusive. In particular, the predominant theory of colloidal interactions across fluid films, the widely used Derjaguin-Landau-Verwey-Overbeek model, fails to predict the ubiquitous existence of stable swelling states at interparticle distances below 3 nm that are stabilized by specific inter-atomic interactions in overlapping electrical double layers between the charged clay surfaces. Atomistic simulations have the potential to generate detailed insights into the mechanisms of these interactions. Recently, we developed a metadynamics-based molecular dynamics simulation methodology that can predict the free energy of interaction between parallel smectite clay particles in a wide range of interparticle distances (from 0.3 to 3 nm) and salinities (from 0.0 to 1.0 M NaCl). Here, we extend this work by characterizing the sensitivity of interparticle interactions to counterion type (Na, K, Ca). We establish a detailed picture of the free energy of interaction of parallel clay particles across water films as the sum of five interaction mechanisms with different sensitivities to salinity, counterion type, and interparticle distance.
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Affiliation(s)
- Xinyi Shen
- Department of Civil and Environmental
Engineering and High Meadows Environmental Institute, Princeton University, Princeton, New Jersey08544, United States
| | - Ian C. Bourg
- Department of Civil and Environmental
Engineering and High Meadows Environmental Institute, Princeton University, Princeton, New Jersey08544, United States
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3
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Huang Y, Zhang Z. Ion exchange selectivity (Mg 2+, Ca 2+ and K +) in hydrated Na-montmorillonite: insights from molecular dynamic simulations. MOLECULAR SIMULATION 2022. [DOI: 10.1080/08927022.2022.2152062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yufeng Huang
- School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, People’s Republic of China
| | - Zhijun Zhang
- School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, People’s Republic of China
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4
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Gao Y, Wang Y, Chen C, Zhou J, Cheng Y, Shi L. Preparation of Montmorillonite Nanosheets with a High Aspect Ratio through Heating/Rehydrating and Gas-Pushing Exfoliation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:10520-10529. [PMID: 35981283 DOI: 10.1021/acs.langmuir.2c01320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Montmorillonite (MMT) is an abundant silicate mineral with ultrahigh stability. The exfoliation of stacked MMT into high-aspect-ratio nanosheets is of crucial importance for various applications such as toxic gas suppression, barrier property enhancement, flame retardancy, and ion conduction. In this work, we develop a new heating/rehydrating and gas-pushing method that can successfully exfoliate MMT into nanosheets with aspect ratios (600-5000) far higher than the currently reported values (1-120). The MMT first goes through a "starvation pretreatment" under different heating temperatures to improve its hydrophilicity and is then rehydrated in a hydrogen peroxide solution. The hydrogen peroxide in the MMT interlayer space can decompose into water and oxygen bubbles, thus finally leading to the exfoliation via gas-pushing while preserving the large lateral size (mainly in the range of 1-6 μm) of the nanosheets. By changing the pretreatment temperature and pH value of the hydrogen peroxide solution, the exfoliation performance can be tuned. This simple and low-cost exfoliation method is promising to achieve the mass production of MMT nanosheets with a high aspect ratio and may promote its application in various fields such as energy conversion, drug delivery, and photocatalysis.
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Affiliation(s)
- Yushuan Gao
- Center of Nanomaterials for Renewable Energy (CNRE), State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, P. R. China
| | - Yindong Wang
- Center of Nanomaterials for Renewable Energy (CNRE), State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, P. R. China
| | - Chengxiang Chen
- Center of Nanomaterials for Renewable Energy (CNRE), State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, P. R. China
| | - Jun Zhou
- Center of Nanomaterials for Renewable Energy (CNRE), State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, P. R. China
| | - Yonghong Cheng
- Center of Nanomaterials for Renewable Energy (CNRE), State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, P. R. China
| | - Le Shi
- Center of Nanomaterials for Renewable Energy (CNRE), State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, P. R. China
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5
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Wang C, Myshkin VF, Khan VA, Panamareva AN. A review of the migration of radioactive elements in clay minerals in the context of nuclear waste storage. J Radioanal Nucl Chem 2022. [DOI: 10.1007/s10967-022-08394-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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6
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Wang C, Myshkin VF, Khan VA, Poberezhnikov AD, Baraban AP. Effect of Temperature on the Diffusion and Sorption of Cations in Clay Vermiculite. ACS OMEGA 2022; 7:11596-11605. [PMID: 35449982 PMCID: PMC9017095 DOI: 10.1021/acsomega.1c06059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 03/21/2022] [Indexed: 06/14/2023]
Abstract
The MD method for modeling vermiculite containing Na+, Rb+, Cs+, Mg2+, and Ba2+ cations shows the following: With a weak swelling of clay, the temperature has no significant effect on the diffusion of water and cations through vermiculite. With a high content of water in vermiculite, the effect of temperature on the diffusion coefficient of water is greater than that of cations. We studied the structure of RDF ions in Na+-vermiculite, in which some of the cations are replaced by Rb+, Cs+, Mg2+, and Ba2+. Cations of alkali and alkaline earth metals compete with Na+ ions for adsorption sites on the surface of the clay layer. The alkaline earth metal cations are in the middle between the clay layers due to their higher charge and stronger hydration. In this case, Na+ is localized at the surface of the clay layer. Thus, cations of alkaline earth metals have little effect on the temperature dependence of the diffusion coefficient Na+.
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Affiliation(s)
- Cailun Wang
- Division for Nuclear-Fuel
Cycle, Tomsk Polytechnic University, Tomsk 634050, Russian Federation
| | | | - Valeriy Alekseevich Khan
- Division for Nuclear-Fuel
Cycle, Tomsk Polytechnic University, Tomsk 634050, Russian Federation
- Zuev Institute of Atmospheric
Optics of the Siberian Branch of the RAS, Tomsk 634055, Russian Federation
| | | | - Alexander Petrovich Baraban
- Department of Solid-State Electronics, Saint-Petersburg State University, St. Petersburg 198504, Russian Federation
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7
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Ding T, Wang R, Xu J, Camara M, Zhou W, Zhang J. Dissociation mechanism of methane hydrate by CaCl 2: an experimental and molecular dynamics study. J Mol Model 2022; 28:109. [PMID: 35357589 DOI: 10.1007/s00894-022-05070-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 02/26/2022] [Indexed: 11/25/2022]
Abstract
The formation of gas hydrate is a serious threat to the safe and effective completion of deepwater drilling and transportation operations, although it is considered as a potential energy resource. The inorganic salts are generally used as thermodynamic inhibitors; CaCl2 as a common additive in drilling fluids exhibits unique properties. In this study, we explored the dissociation mechanism of CH4 hydrate in CaCl2 solutions at the macroscopic and microscopic scale using experiment and molecular dynamics (MD) simulation. The experimental results showed that CaCl2 accelerated the dissociation rate of CH4 hydrate. The dissociation rate of CH4 hydrate increased with the increase of CaCl2 concentration at large depressurization pressure and was mainly affected by pressure when the depressurization pressure was lower. MD simulations were used to give an atomic scale interpretation of the macroscopic results obtained from the experiment. The results showed that the addition of CaCl2 destroyed the resistance liquid film formed during CH4 hydrate dissociation, thus accelerating the dissociation process, in good agreement with experimental results. HIGHLIGHTS: • The amount of CaCl2 affects CH4 hydrate dissociation at large depressurization pressure. • The dissociation of CH4 hydrate at low depressurization pressure is dependent on pressure. • Ca2+ destroys effectively the resistance liquid film produced during hydrate dissociation. • MD simulation results are in agreement with those of the experiment.
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Affiliation(s)
- Tingji Ding
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China
| | - Ruihe Wang
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China. .,Key Laboratory of Unconventional Oil & Gas Development, Ministry of Education, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China.
| | - Jiafang Xu
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China. .,Key Laboratory of Unconventional Oil & Gas Development, Ministry of Education, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China.
| | - Moussa Camara
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China
| | - Weidong Zhou
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China.,Key Laboratory of Unconventional Oil & Gas Development, Ministry of Education, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China
| | - Jun Zhang
- School of Material Science & Engineering, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China
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8
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Qiu J, Chen G, Cao X, Cui K, Yang W, Yan Z, Wang Y, Wu P. Molecular dynamics simulation and experimental study of micro‐structure and gel properties of single chain alkyl ammonium intercalated Na‐montmorillonite. J Appl Polym Sci 2022. [DOI: 10.1002/app.52310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jun Qiu
- College of Chemical and Biological Engineering Shandong University of Science and Technology Qingdao China
| | - Guowei Chen
- College of Safety and Environmental Engineering Shandong University of Science and Technology Qingdao China
| | - Xijiao Cao
- Shandong Polytechnic College Jining China
| | - Kaibo Cui
- College of Chemical and Biological Engineering Shandong University of Science and Technology Qingdao China
| | - Wei Yang
- College of Chemical and Biological Engineering Shandong University of Science and Technology Qingdao China
| | - Zhengqing Yan
- College of Chemical and Biological Engineering Shandong University of Science and Technology Qingdao China
| | - Yueting Wang
- College of Safety and Environmental Engineering Shandong University of Science and Technology Qingdao China
| | - Peng Wu
- College of Chemical and Biological Engineering Shandong University of Science and Technology Qingdao China
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9
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Abstract
In the process of the exploitation of deep oil and gas resources, shale wellbore stability control faces great challenges under complex temperature and pressure conditions. It is difficult to reflect the micro mechanism and process of the action of inorganic salt on shale hydration with the traditional experimental evaluation technology on the macro effect of restraining shale hydration. Aiming at the characteristics of clay minerals of deep shale, the molecular dynamics models of four typical cations (K+, NH4+, Cs+ and Ca2+) inhibiting the hydration of clay minerals have been established by the use of the molecular dynamics simulation method. Moreover, the micro dynamics mechanism of typical inorganic cations inhibiting the hydration of clay minerals has been systematically evaluated, as has the law of cation hydration inhibition performance in response to temperature, pressure and ion type. The research indicates that the cations can promote the contraction of interlayer spacing, compress fluid intrusion channels, reduce the intrusion ability of water molecules, increase the negative charge balance ability and reduce the interlayer electrostatic repulsion force. With the increase in temperature, the inhibition of the cations on montmorillonite hydration is weakened, while the effect of pressure is opposite. Through the molecular dynamics simulation under different temperatures and pressures, we can systematically understand the microcosmic dynamics mechanism of restraining the hydration of clay in deep shale and provide theoretical guidance for the microcosmic control of clay hydration.
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10
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Liu Q, Zhang X, Jiang B, Li J, Li T, Shao X, Cai W, Wang H, Zhang Y. Molecular Dynamics Simulation of Ion Adsorption and Ligand Exchange on an Orthoclase Surface. ACS OMEGA 2021; 6:14952-14962. [PMID: 34151076 PMCID: PMC8209803 DOI: 10.1021/acsomega.1c00826] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 05/26/2021] [Indexed: 05/31/2023]
Abstract
Orthoclase (K-feldspar) is one of the natural inorganic materials, which shows remarkable potential toward removing heavy metal ions from aqueous solutions. Understanding the interactions of the orthoclase and metal ions is important in the treatment of saline wastewater. In this paper, molecular dynamics simulations were used to prove the adsorption of different ions onto orthoclase. The adsorption isotherms show that orthoclase has remarkable efficiency in the removal of cations at low ion concentrations. Aluminol groups are the preferential adsorption sites of cations due to higher negative charges. The adsorption types and adsorption sites are influenced by the valence, radius, and hydration stability of ions. Monovalent cations can be adsorbed in the cavities, whereas divalent cations cannot. The hydrated cation may form an outer-sphere complex or an inner-sphere complex in association with the loss of hydration water. Na+, K+, and Ca2+ ions mainly undergo inner-sphere adsorption and Mg2+ ions prefer outer-sphere adsorption. On the basis of simulation results, the mechanism of ion removal in the presence of orthoclase is demonstrated at a molecular level.
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Affiliation(s)
- Qian Liu
- School
of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
| | - Xuan Zhang
- School
of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
| | - Binbin Jiang
- State
Key Laboratory of Water Resource Protection and Utilization in Coal
Mining, Beijing 100011, China
| | - Jingfeng Li
- State
Key Laboratory of Water Resource Protection and Utilization in Coal
Mining, Beijing 100011, China
| | - Ting Li
- State
Key Laboratory of Water Resource Protection and Utilization in Coal
Mining, Beijing 100011, China
| | - Xianzhen Shao
- Hekou
Oil Production Plant of Shengli Oilfield, Sinopec, Dongying, Shandong 257200, China
| | - Weibin Cai
- School
of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
| | - Hongyuan Wang
- School
of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
| | - Yuankun Zhang
- School
of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
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11
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Microscopic adsorption mechanism of montmorillonite for common ciprofloxacin emerging contaminant: Molecular dynamics simulation and Multiwfn wave function analysis. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126186] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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12
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Yan H, Zhang Z. Effect and mechanism of cation species on the gel properties of montmorillonite. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125824] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Qiu J, Cui K, Chen G, Wang Y, Liu D, Jiang S, Wang Y, Wu P, Liu X, Wang G, Lyu X. Micro-structure and gel performance of octadecyl trimethyl ammonium chloride intercalated montmorillonite. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125710] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Fayoyiwa AD, Hirvi JT, Pakkanen TA. Roles of alkaline-earth cation species in the swelling pressure of smectites – A computational study. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137602] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Qiu J, Liu D, Chen G, Wang Y, Jiang S, Wu P, Wang G, Lyu X. Microscopic Distribution of Chemical Constituents in the Interlayer Space of OTAC Intercalated Montmorillonite Complex:Molecular Simulation Study. ChemistrySelect 2020. [DOI: 10.1002/slct.202001819] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- J. Qiu
- College of Chemical and Biological Engineering Shandong University of Science and Technology 579 Qianwangang Road, Huangdao District Qingdao, Shandong Province 266590 P. R. China
| | - D. Liu
- College of Safety and Environmental Engineering Shandong University of Science and Technology 579 Qianwangang Road, Huangdao District Qingdao, Shandong Province 266590 P. R. China
| | - G. Chen
- College of Safety and Environmental Engineering Shandong University of Science and Technology 579 Qianwangang Road, Huangdao District Qingdao, Shandong Province 266590 P. R. China
| | - Y. Wang
- College of Safety and Environmental Engineering Shandong University of Science and Technology 579 Qianwangang Road, Huangdao District Qingdao, Shandong Province 266590 P. R. China
| | - S. Jiang
- College of Safety and Environmental Engineering Shandong University of Science and Technology 579 Qianwangang Road, Huangdao District Qingdao, Shandong Province 266590 P. R. China
| | - P. Wu
- College of Chemical and Biological Engineering Shandong University of Science and Technology 579 Qianwangang Road, Huangdao District Qingdao, Shandong Province 266590 P. R. China
| | - G. Wang
- School of Resources Environment and Materials Guangxi University 100 Daxue Road, Xixiangtang District Nanning, Guangxi Zhuang Autonomous Region 530004 P. R. China
| | - X. Lyu
- College of Chemical and Biological Engineering Shandong University of Science and Technology 579 Qianwangang Road, Huangdao District Qingdao, Shandong Province 266590 P. R. China
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16
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Gong HR, Ren FD, Zhao LX, Cao DL, Wang JL. Hydration and swelling: a theoretical investigation on the cooperativity effect of H-bonding interactions between p-hydroxy hydroxymethyl calix[4]/[5]arene and H 2O by many-body interaction and density functional reactivity theory. J Mol Model 2020; 26:190. [PMID: 32613574 DOI: 10.1007/s00894-020-04442-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 06/10/2020] [Indexed: 11/28/2022]
Abstract
In order to explore the nature of the hydration and swelling of superabsorbent resin, a theoretical investigation into the cooperativity effect of the H-bonding interactions in the hydrates of four model compounds that can be regarded as the units of hydroquinone formaldehyde resin (HFR) (i.e., O-hydroxymethyl-1,4-dihydroxybenzene, methylene di-O-hydroxymethyl-1,4-dihydroxybenzene, p-hydroxy hydroxymethyl calix[4]arene and p-hydroxy hydroxymethyl calix[5]arene) was carried out by many-body interaction and density functional reactivity theory. The HFR···H2O···H2O complexes, in which the H2O···H2O moieties are bound with both the hydroxyl groups of HFR, are the most stable. For the HFR(H2O)n clusters, the interaction energy per building block is increased as the number of the size n increases, indicating the cooperativity effect. Therefore, a deduction is given that the cooperativity effects of the H-bonding interactions play an important role in the process of the hydration and swelling of HFR, and the swelling behavior is mainly attributed to the cooperativity effects which arised from the interactions between the H2O molecules. The origin of the cooperativity effect was examined employing several information-theoretic quantities in the density functional reactivity theory. The degree of swelling of HFR was quantitated using a measure of volume. Graphical abstract.
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Affiliation(s)
- Hui-Ru Gong
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, China
| | - Fu-de Ren
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, China.
| | - Lin-Xiu Zhao
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, China
| | - Duan-Lin Cao
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, China
| | - Jian-Long Wang
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, China
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17
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Fayoyiwa AD, Hirvi JT, Pakkanen TA. Computational study of the roles of alkali cation species in the swelling pressure of smectites. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137200] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Effect of Layer Charge Density on Hydration Properties of Montmorillonite: Molecular Dynamics Simulation and Experimental Study. Int J Mol Sci 2019; 20:ijms20163997. [PMID: 31426343 PMCID: PMC6720539 DOI: 10.3390/ijms20163997] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 08/12/2019] [Accepted: 08/14/2019] [Indexed: 11/17/2022] Open
Abstract
Four kinds of Ca-montmorillonite with different layer charge density were used to study the effect of charge density on their hydration properties by molecular dynamics simulation and experiments. The research results of Z-density distribution of water molecules, Hw (hydrogen in water molecules), and Ca in the interlayer of montmorillonite show that the hydration properties of montmorillonite are closely related to its layer charge density. If the charge density is low, the water molecules in the interlayers are mainly concentrated on the sides of the central axis about –1.3 Å and 1.5 Å. As the charge density increases from 0.38semi-cell to 0.69semi-cell, the water molecules are distributed −2.5 Å and 2.4 Å away from the siloxane surface (Si-O), the concentration of water molecules near the central axis decreases, and at the same time, Ca2+ appears to gradually shift from the vicinity of the central axis to the Si-O surface on both sides in the montmorillonite layer. The simulation results of the radial distribution function (RDF) of the Ca-Hw, Ca-Ow (oxygen in water molecules), and Ca-Ot (the oxygen in the tetrahedron) show that the Ca2+ and Ow are more tightly packed together than that of Hw; with the increase of the charge density, due to the fact that the negative charge sites on the Si-O surface increase, under the action of electrostatic attraction, some of the Ca2+ are pulled towards the Si-O surface, which is more obvious when the layer charge density of the montmorillonite is higher. The results of the RDF of the Ot-Hw show that with the increase of charge density, the number of hydrogen bonds formed by Ot and Hw in the interlayers increase, and under the action of hydrogen bonding force, the water molecules near the central axis are pulled towards the two sides of Si-O surface. As a result, the arrangement of water molecules is more compact, and the structure is obvious. Correspondingly, the self-diffusion coefficient shows that the higher the layer charge density, the lower the self-diffusion coefficient of water molecules in interlayers is and the worse the hydration performance of montmorillonite. The experimental results of the experiments fit well with the above simulation results.
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Qiu J, Li G, Liu D, Jiang S, Wang G, Chen P, Zhu X, Cao X, Lyu X. Effect of Layer Charge Characteristics on the Distribution Characteristics of H 2O and Ca 2+ in Ca-Montmorillonites Interlayer Space: Molecular Dynamics Simulation. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E2318. [PMID: 31330802 PMCID: PMC6679075 DOI: 10.3390/ma12142318] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 07/17/2019] [Accepted: 07/17/2019] [Indexed: 11/16/2022]
Abstract
The charge characteristics of montmorillonite have significant effects on its hydration and application performances. In this study, a molecular dynamics simulation method was used to study the influence of the charge position and charge density of montmorillonite on the distribution of H2O and Ca2+ in layers. The results showed that when the layer charge is mainly derived from the substitution among ions in the tetrahedron, a large number of Hw and Ot are combined into a hydrogen bond in the interlayer, thus the water molecules are more compactly arranged and the diffusion of water molecules among the layers is reduced. In addition, the Ca2+ are diffused to the sides by a concentrated distribution in the central axis of the layer. As the charge density of the montmorillonite increases, the polarity of the Si-O surface increases, which lesds to the deterioration of the diffusibility of the water molecules and the structure of the water molecules in the interlayers is more stable. The increase in the layer charge density lesds to the expansion of the isomorphic substitution range of the crystal structure, which results in a more dispersed distribution of Ca2+ among the layers under the action of electrostatic attraction between the substituted negative sites and the Ca2+.
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Affiliation(s)
- Jun Qiu
- College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
| | - Guoqing Li
- College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Dongliang Liu
- College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Shan Jiang
- College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Guifang Wang
- School of Resources Environment and Materials, Guangxi University, Nanning 530004, China
| | - Ping Chen
- College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Xiangnan Zhu
- College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Xiaoqiang Cao
- College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Xianjun Lyu
- College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
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