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Liu Y, Zhao X, Yin J. Enhanced electro-responsive electrorheological efficiency of polyethylene oxide-intercalated montmorillonite nanocomposite suspension. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
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2
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Sengwa RJ, Dhatarwal P. Thermally improved crystalline phase and intercalated
PEO
/
OMMT
nanocomposites for high to ultrahigh radio frequency range low‐permittivity nanodielectrics. J Appl Polym Sci 2021. [DOI: 10.1002/app.51599] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Ram Jeewan Sengwa
- Dielectric Research Laboratory, Department of Physics Jai Narain Vyas University Jodhpur India
| | - Priyanka Dhatarwal
- Dielectric Research Laboratory, Department of Physics Jai Narain Vyas University Jodhpur India
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3
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Nanda R, Bowers GM, Loganathan N, Burton SD, Kirkpatrick RJ. Temperature dependent structure and dynamics in smectite interlayers: 23Na MAS NMR spectroscopy of Na-hectorite. RSC Adv 2019; 9:12755-12765. [PMID: 35515846 PMCID: PMC9063695 DOI: 10.1039/c9ra01056d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Accepted: 04/11/2019] [Indexed: 11/25/2022] Open
Abstract
23Na MAS NMR spectroscopy of the smectite mineral hectorite acquired at temperatures from −120 °C to 40 °C in combination with the results from computational molecular dynamics (MD) simulations show the presence of complex dynamical processes in the interlayer galleries that depend significantly on their hydration state. The results indicate that site exchange occurs within individual interlayers that contain coexisting 1 and 2 water layer hydrates in different places. We suggest that the observed dynamical averaging may be due to motion of water volumes comparable to the dripplons recently proposed to occur in hydrated graphene interlayers (Yoshida et al. Nat. Commun., 2018, 9, 1496). Such motion would cause rippling of the T-O-T structure of the clay layers at frequencies greater than ∼25 kHz. For samples exposed to 0% relative humidity (R.H.), the 23Na spectra show the presence of two Na+ sites (probably 6 and 9 coordinated by basal oxygen atoms) that do not undergo dynamical averaging at any temperature from −120 °C to 40 °C. For samples exposed to R.H.s from 29% to 100% the spectra show the presence of three hydrated Na+ sites that undergo dynamical averaging beginning at −60 °C. These sites have different numbers of H2O molecules coordinating the Na+, and diffusion calculations indicate that they probably occur within the same individual interlayer. The average hydration state of Na+ increases with increasing R.H. and water content of the clay. 23Na MAS NMR spectroscopy of the smectite mineral hectorite acquired at temperature from −120 °C to 40 °C shows the presence of complex dynamical processes in the interlayer galleries that depend significantly on their hydration state.![]()
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Affiliation(s)
- Raju Nanda
- Department of Chemistry
- Michigan State University
- East Lansing
- USA
- Department of Chemistry
| | - Geoffrey M. Bowers
- Department of Chemistry and Biochemistry
- St. Mary's College of Maryland
- St. Mary's City
- USA
| | | | - Sarah D. Burton
- William R. Wiley Environmental and Molecular Sciences Laboratory
- Pacific Northwest National Laboratory
- Richland
- USA
| | - R. James Kirkpatrick
- Department of Chemistry
- Michigan State University
- East Lansing
- USA
- Department of Earth and Environmental Sciences
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4
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Schaef HT, Loganathan N, Bowers GM, Kirkpatrick RJ, Yazaydin AO, Burton SD, Hoyt DW, Thanthiriwatte KS, Dixon DA, McGrail BP, Rosso KM, Ilton ES, Loring JS. Tipping Point for Expansion of Layered Aluminosilicates in Weakly Polar Solvents: Supercritical CO 2. ACS APPLIED MATERIALS & INTERFACES 2017; 9:36783-36791. [PMID: 28952722 DOI: 10.1021/acsami.7b10590] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Layered aluminosilicates play a dominant role in the mechanical and gas storage properties of the subsurface, are used in diverse industrial applications, and serve as model materials for understanding solvent-ion-support systems. Although expansion in the presence of H2O is well-known to be systematically correlated with the hydration free energy of the interlayer cation, particularly in environments dominated by nonpolar solvents (i.e., CO2), uptake into the interlayer is not well-understood. Using novel high-pressure capabilities, we investigated the interaction of dry supercritical CO2 with Na-, NH4-, and Cs-saturated montmorillonite, comparing results with predictions from molecular dynamics simulations. Despite the known trend in H2O and that cation solvation energies in CO2 suggest a stronger interaction with Na, both the NH4- and Cs-clays readily absorbed CO2 and expanded, while the Na-clay did not. The apparent inertness of the Na-clay was not due to kinetics, as experiments seeking a stable expanded state showed that none exists. Molecular dynamics simulations revealed a large endothermicity to CO2 intercalation in the Na-clay but little or no energy barrier for the NH4- and Cs-clays. Indeed, the combination of experiment and theory clearly demonstrate that CO2 intercalation of Na-montmorillonite clays is prohibited in the absence of H2O. Consequently, we have shown for the first time that in the presence of a low dielectric constant, gas swelling depends more on the strength of the interaction between the interlayer cation and aluminosilicate sheets and less on that with solvent. The finding suggests a distinct regime in layered aluminosilicate swelling behavior triggered by low solvent polarizability, with important implications in geomechanics, storage, and retention of volatile gases, and across industrial uses in gelling, decoloring, heterogeneous catalysis, and semipermeable reactive barriers.
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Affiliation(s)
- Herbert T Schaef
- Pacific Northwest National Laboratory , Richland, Washington 99356, United States
| | - Narasimhan Loganathan
- College of Natural Science, Michigan State University , East Lansing, Michigan 48824, United States
| | - Geoffrey M Bowers
- Department of Chemistry and Biochemistry, St. Mary's College of Maryland , St. Mary's City, Maryland 20686, United States
| | - R James Kirkpatrick
- College of Natural Science, Michigan State University , East Lansing, Michigan 48824, United States
| | - A Ozgur Yazaydin
- College of Natural Science, Michigan State University , East Lansing, Michigan 48824, United States
- Department of Chemical Engineering, University College London , London WC1E 7JE, United Kingdom
| | - Sarah D Burton
- William R. Wiley Environmental and Molecular Sciences Laboratory, Pacific Northwest National Laboratory , Richland, Washington 99356, United States
| | - David W Hoyt
- William R. Wiley Environmental and Molecular Sciences Laboratory, Pacific Northwest National Laboratory , Richland, Washington 99356, United States
| | - K Sahan Thanthiriwatte
- Department of Chemistry, The University of Alabama , Tuscaloosa, Alabama 35487, United States
| | - David A Dixon
- Department of Chemistry, The University of Alabama , Tuscaloosa, Alabama 35487, United States
| | - B Peter McGrail
- Pacific Northwest National Laboratory , Richland, Washington 99356, United States
| | - Kevin M Rosso
- Pacific Northwest National Laboratory , Richland, Washington 99356, United States
| | - Eugene S Ilton
- Pacific Northwest National Laboratory , Richland, Washington 99356, United States
| | - John S Loring
- Pacific Northwest National Laboratory , Richland, Washington 99356, United States
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5
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Dalil Heirati SZ, Shirini F, Fallah Shojaei A. Sulfonated PEG-intercalated montmorillonite [(Mt/PEG)-SO3H] as efficient and ecofriendly nanocatalyst for synthesis of α,α′-bis(substituted benzylidene)cycloalkanones. RESEARCH ON CHEMICAL INTERMEDIATES 2017. [DOI: 10.1007/s11164-017-2983-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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6
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Kalaga K, Rodrigues MTF, Gullapalli H, Babu G, Arava LMR, Ajayan PM. Quasi-Solid Electrolytes for High Temperature Lithium Ion Batteries. ACS APPLIED MATERIALS & INTERFACES 2015; 7:25777-25783. [PMID: 26535786 DOI: 10.1021/acsami.5b07636] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Rechargeable batteries capable of operating at high temperatures have significant use in various targeted applications. Expanding the thermal stability of current lithium ion batteries requires replacing the electrolyte and separators with stable alternatives. Since solid-state electrolytes do not have a good electrode interface, we report here the development of a new class of quasi-solid-state electrolytes, which have the structural stability of a solid and the wettability of a liquid. Microflakes of clay particles drenched in a solution of lithiated room temperature ionic liquid forming a quasi-solid system has been demonstrated to have structural stability until 355 °C. With an ionic conductivity of ∼3.35 mS cm(-1), the composite electrolyte has been shown to deliver stable electrochemical performance at 120 °C, and a rechargeable lithium battery with Li4Ti5O12 electrode has been tested to deliver reliable capacity for over several cycles of charge-discharge.
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Affiliation(s)
- Kaushik Kalaga
- Department of Materials Science and Nano Engineering, Rice University , Houston, Texas 77005, United States
| | - Marco-Tulio F Rodrigues
- Department of Materials Science and Nano Engineering, Rice University , Houston, Texas 77005, United States
| | - Hemtej Gullapalli
- Department of Materials Science and Nano Engineering, Rice University , Houston, Texas 77005, United States
| | - Ganguli Babu
- Department of Mechanical Engineering, Wayne State University , Detroit, Michigan 48202, United States
| | - Leela Mohana Reddy Arava
- Department of Mechanical Engineering, Wayne State University , Detroit, Michigan 48202, United States
| | - Pulickel M Ajayan
- Department of Materials Science and Nano Engineering, Rice University , Houston, Texas 77005, United States
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7
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Gao S, Zhong J, Xue G, Wang B. Ion conductivity improved polyethylene oxide/lithium perchlorate electrolyte membranes modified by graphene oxide. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2014.07.044] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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8
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Choudhary S, Sengwa RJ. Structural and dielectric studies of amorphous and semicrystalline polymers blend-based nanocomposite electrolytes. J Appl Polym Sci 2014. [DOI: 10.1002/app.41311] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Shobhna Choudhary
- Department of Physics, Dielectric Research Laboratory; Jai Narain Vyas University; Jodhpur 342 005 India
| | - Ram Jeewan Sengwa
- Department of Physics, Dielectric Research Laboratory; Jai Narain Vyas University; Jodhpur 342 005 India
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9
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Siqueira LJA, Constantino VRL, Camilo FF, Torresi RM, Temperini MLA, Ribeiro MCC, Izumi CMS. Probing the local environment of hybrid materials designed from ionic liquids and synthetic clay by Raman spectroscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 122:469-475. [PMID: 24326263 DOI: 10.1016/j.saa.2013.11.084] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Revised: 11/12/2013] [Accepted: 11/13/2013] [Indexed: 06/03/2023]
Abstract
Hybrid organic-inorganic material containing Laponite clay and ionic liquids forming cations have been prepared and characterized by FT-Raman spectroscopy, X-ray diffraction, and thermal analysis. The effect of varying the length of the alkyl side chain and conformations of cations has been investigated by using different ionic liquids based on piperidinium and imidazolium cations. The structure of the N,N-butyl-methyl-piperidinium cation and the assignment of its vibrational spectrum have been further elucidated by quantum chemistry calculations. The X-ray data indicate that the organic cations are intercalated parallel to the layers of the clay. Comparison of Raman spectra of pure ionic liquids with different anions and the resulting solid hybrid materials in which the organic cations have been intercalated into the clay characterizes the local environment experienced by the cations in the hybrid materials. The Raman spectra of hybrid materials suggest that the local environment of all confined cations, in spite of this diversity in properties, resembles the liquid state of ionic liquids with a relatively disordered structure.
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Affiliation(s)
- Leonardo J A Siqueira
- Laboratório de Materiais Híbridos, Instituto de Ciências Químicas, Farmacêuticas e Ambientais, Universidade Federal de São Paulo, Rua São Nicolau, 210 CEP 09913-030 Diadema, SP, Brazil
| | - Vera R L Constantino
- Instituto de Química, Universidade de São Paulo, C.P. 26077, CEP 05513-970 São Paulo, SP, Brazil
| | - Fernanda F Camilo
- Laboratório de Materiais Híbridos, Instituto de Ciências Químicas, Farmacêuticas e Ambientais, Universidade Federal de São Paulo, Rua São Nicolau, 210 CEP 09913-030 Diadema, SP, Brazil
| | - Roberto M Torresi
- Instituto de Química, Universidade de São Paulo, C.P. 26077, CEP 05513-970 São Paulo, SP, Brazil
| | - Marcia L A Temperini
- Instituto de Química, Universidade de São Paulo, C.P. 26077, CEP 05513-970 São Paulo, SP, Brazil
| | - Mauro C C Ribeiro
- Instituto de Química, Universidade de São Paulo, C.P. 26077, CEP 05513-970 São Paulo, SP, Brazil
| | - Celly M S Izumi
- Instituto de Química, Universidade de São Paulo, C.P. 26077, CEP 05513-970 São Paulo, SP, Brazil.
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10
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Choudhary S, Sengwa RJ. Intercalated clay structures and amorphous behavior of solution cast and melt pressed poly(ethylene oxide)-clay nanocomposites. J Appl Polym Sci 2013. [DOI: 10.1002/app.39898] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Shobhna Choudhary
- Dielectric Research Laboratory, Department of Physics; J N V University; Jodhpur 342 005 India
| | - Ram Jeewan Sengwa
- Dielectric Research Laboratory, Department of Physics; J N V University; Jodhpur 342 005 India
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11
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Saito H, Dobashi M, Naka H, Momma T, Osaka T, Sugahara Y. Preparation of LiClO 4-doped Titanium Organodiphosphonates Possessing Oligomeric Ethylene Oxide Chains and Their Ionic Conductivity. CHEM LETT 2013. [DOI: 10.1246/cl.2013.318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hitomi Saito
- Department of Applied Chemistry, School of Advanced Science and Engineering, Waseda University
| | - Masataka Dobashi
- Department of Applied Chemistry, School of Advanced Science and Engineering, Waseda University
| | - Hiroki Naka
- Research Institute for Science and Engineering, Waseda University
| | - Toshiyuki Momma
- Department of Applied Chemistry, School of Advanced Science and Engineering, Waseda University
| | - Tetsuya Osaka
- Department of Applied Chemistry, School of Advanced Science and Engineering, Waseda University
- Kagami Memorial Laboratory for Materials Science and Technology, Waseda University
| | - Yoshiyuki Sugahara
- Department of Applied Chemistry, School of Advanced Science and Engineering, Waseda University
- Kagami Memorial Laboratory for Materials Science and Technology, Waseda University
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12
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13
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Chen C, Shao X, Yao K, Yuan J, Shangguan W, Kawaguchi T, Shimazu K. Unusual catalytic effect of the two-dimensional molecular space with regular triphenylphosphine groups. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:11958-11965. [PMID: 21905651 DOI: 10.1021/la2023083] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A novel organic-inorganic hybrid 2D molecular space with regular triphenylphosphine groups (triphenylphosphineamidephenylsilica, PPh(3)APhS) was successfully synthesized through grafting triphenylphosphine groups in the 2D structure of layered aminophenylsilica dodecyl sulfate (APhTMS-DS), which was developed in our previous research, with regular ammonium groups. The 2D structures were kept after the grafting reaction of triphenylphosphine groups in PPh(3)APhS. The catalytic potentials of 2D molecular space with regular triphenylphosphine groups were investigated. An unusual catalytic effect was found in a carbon-phosphorus ylide reaction. The PPh(3)-catalyzed reaction of modified allylic compounds, including bromides and chlorides with tropone yielded a [3 + 6] annulation product. However, an unusual [8 + 3] cycloadduct was obtained in the reaction of modified allylic compounds, including bromides and chlorides with tropone catalyzed by PPh(3)APhS. Otherwise, the stable catalytic intermediate was successfully separated, and the reaction activity of the catalytic intermediate was confirmed in the reaction of modified allylic compounds with tropone catalyzed by PPh(3)APhS. This research is the first successful example of directly influencing catalytic reaction processes and product structures by utilizing the chemical and geometrical limits of 2D molecular spaces with regular catalyst molecules and affords a novel method for controlling catalytic reaction processes and catalyst design.
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Affiliation(s)
- Chen Chen
- Department of Chemistry, Shanghai University, Shanghai 200444, PR China
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14
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Sengwa RJ, Choudhary S. Dielectric Relaxations and Structures of Nanoclay in Solution Cast Poly(Ethylene Oxide)– Montmorillonite Clay Nanocomposites. J MACROMOL SCI B 2011. [DOI: 10.1080/00222348.2010.507451] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- R. J. Sengwa
- a Dielectric Research Laboratory, Department of Physics , Jai Narain Vyas University , Jodhpur , Rajasthan , India
| | - Shobhna Choudhary
- a Dielectric Research Laboratory, Department of Physics , Jai Narain Vyas University , Jodhpur , Rajasthan , India
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15
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Matějíček P, Brus J, Jigounov A, Pleštil J, Uchman M, Procházka K, Gradzielski M. On the Structure of Polymeric Composite of Metallacarborane with Poly(ethylene oxide). Macromolecules 2011. [DOI: 10.1021/ma200502t] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Pavel Matějíček
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Jiří Brus
- Institute of Macromolecular Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Heyrovský Sq. 2, 16206 Prague 6, Czech Republic
| | - Alexander Jigounov
- Institute of Macromolecular Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Heyrovský Sq. 2, 16206 Prague 6, Czech Republic
| | - Josef Pleštil
- Institute of Macromolecular Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Heyrovský Sq. 2, 16206 Prague 6, Czech Republic
| | - Mariusz Uchman
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Karel Procházka
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Michael Gradzielski
- Stranski-Laboratorium für Physikalische Chemie und Theoretische Chemie, Institut für Chemie, Sekr. TC 7, Technische Universität Berlin, Strasse des 17. Juni 124, D-10623 Berlin, Germany
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16
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Choudhary S, Sengwa RJ. Dielectric properties and structures of melt-compounded poly(ethylene oxide)-montmorillonite nanocomposites. J Appl Polym Sci 2011. [DOI: 10.1002/app.35556] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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17
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de Souza CEC, Lima AS, Nascimento RSV. Hydrophobically modified poly(ethylene glycol) as reactive clays inhibitor additive in water-based drilling fluids. J Appl Polym Sci 2010. [DOI: 10.1002/app.31318] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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18
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Dielectric relaxation processes and ionic conduction behaviour in poly(ethylene oxide)–montmorillonite clay nanocomposite aqueous colloidal suspensions. Colloid Polym Sci 2009. [DOI: 10.1007/s00396-009-2056-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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19
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Chen J, Yao K, Shangguan W, Yuan J. Investigation of catalytic characterization of two-dimensional molecular space with regular ammonium and pyridine groups. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:5993-5999. [PMID: 19296641 DOI: 10.1021/la8042523] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Novel two-dimensional molecular space with regular pyridine groups layered pyridine-4-amidepropylsilica (PAPS) and pyridine-4-amidephenylsilica (PAPhS) were successfully synthesized through grafting pyridine groups in the layer structure of two-dimensional molecular space with regular ammonium groups layered aminopropylsilica (ATMS-DS) and layered aminophenylsilica (APhTMS-DS). The two-dimensional structures were kept after grafting reaction of pyridine groups in PAPS and PAPhS. The catalytic potentials of two-dimensional molecular space with regular ammonium and pyridine groups were investigated. The catalytic capability of APhTMS-DS, PAPS, and PAPhS was confirmed through Knoevenagel condensation reactions. Knoevenagel condensation of aromatic aldehydes with malononitrile was not observed in the presence of ATMS-DS. Otherwise, the lower yield of Knoevenagel condensation of higher active 2-chlorobenzaldehyde with malononitrile in the presence of APhTMS-DS, PAPS, and PAPhS indicated the potential of the two-dimensional molecular space with regular catalyst molecules on influencing catalysis processes utilizing the chemical and geometrical limits.
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Affiliation(s)
- Jianming Chen
- Department of Chemistry, Shanghai University, Shanghai 200444, PR China
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20
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Sengwa RJ, Choudhary S, Sankhla S. Dielectric behaviour and relaxation processes of montmorillonite clay nano-platelet colloidal suspensions in poly(vinyl pyrrolidone)-ethylene glycol oligomer blends. POLYM INT 2009. [DOI: 10.1002/pi.2592] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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21
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Dielectric spectroscopy of hydrophilic polymers–montmorillonite clay nanocomposite aqueous colloidal suspension. Colloids Surf A Physicochem Eng Asp 2009. [DOI: 10.1016/j.colsurfa.2008.11.015] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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22
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Wang YP, Gao XH, Li HK, Li HJ, Liu HG, Guo HX. Effect of Active Filler Addition on the Ionic Conductivity of PVDF-PEG Polymer Electrolyte. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2009. [DOI: 10.1080/10601320902740277] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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23
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Lorthioir C, Lauprêtre F, Soulestin J, Lefebvre JM. Segmental Dynamics of Poly(ethylene oxide) Chains in a Model Polymer/Clay Intercalated Phase: Solid-State NMR Investigation. Macromolecules 2008. [DOI: 10.1021/ma801909s] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Cédric Lorthioir
- Equipe “Systèmes Polymères Complexes”, Institut de Chimie et des Matériaux Paris-Est, UMR 7182 CNRS/Université Paris XII, 2-8 rue Henri Dunant, 94320 Thiais, France, and Laboratoire de Structure et Propriétés de l’Etat Solide (UMR 8008 CNRS/Université Lille I), Université des Sciences et Technologies de Lille, Bâtiment C6, 59655 Villeneuve d’Ascq Cedex, France
| | - Françoise Lauprêtre
- Equipe “Systèmes Polymères Complexes”, Institut de Chimie et des Matériaux Paris-Est, UMR 7182 CNRS/Université Paris XII, 2-8 rue Henri Dunant, 94320 Thiais, France, and Laboratoire de Structure et Propriétés de l’Etat Solide (UMR 8008 CNRS/Université Lille I), Université des Sciences et Technologies de Lille, Bâtiment C6, 59655 Villeneuve d’Ascq Cedex, France
| | - Jérémie Soulestin
- Equipe “Systèmes Polymères Complexes”, Institut de Chimie et des Matériaux Paris-Est, UMR 7182 CNRS/Université Paris XII, 2-8 rue Henri Dunant, 94320 Thiais, France, and Laboratoire de Structure et Propriétés de l’Etat Solide (UMR 8008 CNRS/Université Lille I), Université des Sciences et Technologies de Lille, Bâtiment C6, 59655 Villeneuve d’Ascq Cedex, France
| | - Jean-Marc Lefebvre
- Equipe “Systèmes Polymères Complexes”, Institut de Chimie et des Matériaux Paris-Est, UMR 7182 CNRS/Université Paris XII, 2-8 rue Henri Dunant, 94320 Thiais, France, and Laboratoire de Structure et Propriétés de l’Etat Solide (UMR 8008 CNRS/Université Lille I), Université des Sciences et Technologies de Lille, Bâtiment C6, 59655 Villeneuve d’Ascq Cedex, France
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Yao K, You X, Shi L, Wan W, Yu F, Chen J. Two-dimensional molecular space with regular molecular structure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:302-309. [PMID: 18041857 DOI: 10.1021/la702700s] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A novel two-dimensional molecular space (layered carboxylpropylamidephenylsilica, CPAPhS) with regular carboxyl groups was successfully synthesized through grafting carboxyl groups in the structure of layered (aminophenyl)silica using butanedioic anhydride. The carboxyl groups regularly arranged in the layered CPAPhS can react with various organic molecules with amino and hydroxyl groups through formation of reactive intermediate with catalyzers, such as SOCl2. In this research, an example was used to prove the reaction properties of regular carboxyl groups in layered CPAPhS. The layered CPAPhS was reacted with SOCl2 to form layered acyl chloridepropylamidephenylsilica (ACPAPhS) and then reacted with n-butylamine and n-butyl alcohol to form layered n-butylamidepropylamidephenylsilica (BAPAPhS) and n-butylesterpropylamidephenylsilica (BEPAPhS) with regular molecular structures. Layered CPAPhS showed the potential as a starting material for formation of a series of novel two-dimensional molecular space with various regular molecular structures, and as a solid acceptor for chemical reagent with amino and hydroxyl groups for chemical processes.
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Affiliation(s)
- Ken Yao
- Department of Chemistry, Shanghai University, Shanghai, People's Republic of China. @
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Chen B, Evans JRG, Greenwell HC, Boulet P, Coveney PV, Bowden AA, Whiting A. A critical appraisal of polymer-clay nanocomposites. Chem Soc Rev 2007; 37:568-94. [PMID: 18224264 DOI: 10.1039/b702653f] [Citation(s) in RCA: 163] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The surge of interest in and scientific publications on the structure and properties of nanocomposites has made it rather difficult for the novice to comprehend the physical structure of these new materials and the relationship between their properties and those of the conventional range of composite materials. Some of the questions that arise are: How should the reinforcement volume fraction be calculated? How can the clay gallery contents be assessed? How can the ratio of intercalate to exfoliate be found? Does polymerization occur in the clay galleries? How is the crystallinity of semi-crystalline polymers affected by intercalation? What role do the mobilities of adsorbed molecules and clay platelets have? How much information can conventional X-ray diffraction offer? What is the thermodynamic driving force for intercalation and exfoliation? What is the elastic modulus of clay platelets? The growth of computer simulation techniques applied to clay materials has been rapid, with insight gained into the structure, dynamics and reactivity of polymer-clay systems. However these techniques operate on the basis of approximations, which may not be clear to the non-specialist. This critical review attempts to assess these issues from the viewpoint of traditional composites thereby embedding these new materials in a wider context to which conventional composite theory can be applied. (210 references).
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Affiliation(s)
- Biqiong Chen
- Department of Materials, Queen Mary, University of London, Mile End Road, London, UK
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Yao K, Fu Y, Shi L, Wan W, You X, Yu F. Reactive two-dimensional layered material with regular chlorine groups. J Colloid Interface Sci 2007; 315:400-4. [PMID: 17689551 DOI: 10.1016/j.jcis.2007.06.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2007] [Revised: 06/09/2007] [Accepted: 06/13/2007] [Indexed: 11/15/2022]
Abstract
A novel reactive layered two-dimensional molecular space material [layered chloroacetamide phenyl silica (CAAPhS)] with regular chlorine groups was synthesized by grafting chlorine groups into the layer structure of layered aminophenyl silica. The reactive activity of chlorine groups regularly arranged in the layer structure of layered CAAPhS was confirmed through a substitution reaction with n-butylamine. Layered CAAPhS showed potential as a starting material for the formation of a series of two-dimensional layered materials with various regular functional molecules and organic-inorganic composite materials.
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Affiliation(s)
- Ken Yao
- Department of Chemistry, Shanghai University, Shanghai 200444, People's Republic of China.
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V2O5 xerogel–poly(ethylene oxide) hybrid material: Synthesis, characterization, and electrochemical properties. J SOLID STATE CHEM 2006. [DOI: 10.1016/j.jssc.2006.08.018] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Miao S, Liu Z, Han B, Yang H, Miao Z, Sun Z. Synthesis and characterization of ZnS-montmorillonite nanocomposites and their application for degrading eosin B. J Colloid Interface Sci 2006; 301:116-22. [PMID: 16774762 DOI: 10.1016/j.jcis.2006.04.080] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2005] [Revised: 04/25/2006] [Accepted: 04/30/2006] [Indexed: 11/23/2022]
Abstract
Nanocomposites of zinc sulfide (ZnS) and montmorillonite (MMT) were prepared via a hydrothermal route. In this method, the MMT treated with hexadecyltrimethyl ammonium bromide (HTAB) aqueous solution was dispersed in the aqueous solution of thiourea and Zn(OOCHCH(3))(2)2H(2)O, and heated at 170 degrees C for about 4 h, resulting in ZnS-MMT composites. The as-prepared nanocomposites were characterized with X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and nitrogen sorption analysis. It was demonstrated that the interlayer space of MMT was enlarged from 0.98 to 3.77 nm after the treatment with HTAB aqueous solution, and the ZnS nanoparticles were deposited on the layers of MMT. Nitrogen sorption analysis demonstrated that the specific surface area of the samples decreased from 39.2 m(2)/g of the pristine MMT to 5.9 m(2)/g of the final ZnS-MMT composites. The resulting ZnS-MMT nanocomposites (50.0 mg) could degrade eosin B completely in aqueous solution (75 ml, 3.2x10(-5) M) within 20 min under UV irradiation.
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Affiliation(s)
- Shiding Miao
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interfacial and Chemical Thermodynamics, Center for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, People's Republic of China
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Xu X, Kirkpatrick RJ. NaCl interaction with interfacially polymerized polyamide films of reverse osmosis membranes: A solid-state 23Na NMR study. J Memb Sci 2006. [DOI: 10.1016/j.memsci.2006.01.032] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Urbanczyk L, Hrobarikova J, Calberg C, Jérôme R, Grandjean J. Motional heterogeneity of intercalated species in modified clays and poly(epsilon-caprolactone)/clay nanocomposites. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:4818-24. [PMID: 16649801 DOI: 10.1021/la060041u] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Modified laponites and synthetic saponites are used as precursors for the preparation of poly(epsilon-caprolactone) (PCL)/clay nanocomposites. The structure and dynamics of species intercalated in the modified clays and the corresponding nanocomposites are characterized by X-ray diffraction and magic-angle spinning NMR. The influence of the headgroup, the hydrocarbon chain length, and the loading of the surfactant on the nanocomposite formation are discussed. The yield of PCL intercalation is related to the probability of direct polymer-clay interactions and to the size of the clay platelets. Relaxation times in the laboratory and rotating frames that allow characterization of fast and slow molecular dynamics in these systems are discussed, showing a motional heterogeneity of the intercalated species.
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Affiliation(s)
- L Urbanczyk
- COSM and CERM, Institute of Chemistry B6a, University of Liege, Sart Tilman, B-4000 Liege, Belgium
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Jiang W, Chen SH, Chen Y. Nanocomposites from phenolic resin and various organo-modified montmorillonites: Preparation and thermal stability. J Appl Polym Sci 2006. [DOI: 10.1002/app.24893] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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