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Jin X, Chen W. A Numerical simulation method for analyzing 1H spin diffusion NMR for Multicomponent and multiphase polymer systems. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2024; 132:101946. [PMID: 38943921 DOI: 10.1016/j.ssnmr.2024.101946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2024] [Revised: 05/30/2024] [Accepted: 06/24/2024] [Indexed: 07/01/2024]
Abstract
A numerical simulation method, namely, SDNMR-WEBFIT, is reported for simulating proton spin diffusion NMR based on the Levenberg-Marquardt algorithm and a pseudo-2D diffusion model. This method is used for the precise quantification of dynamics heterogeneity of the interphase within multiphase polymer systems. The numerical simulation method provides measurements of spin-lattice relaxation time (T1), proton density (ρH), lamellar thickness (d), and spin diffusion coefficient (D) for each component. The pseudo-2D diffusion model is employed to simulate the proton spin diffusion build-up/decay curves, simultaneously calculating the lateral fraction of island-like structures (x-ratio). Such approach was successfully applied to various polymer systems, such as semi-crystalline polymer (Poly(ε-caprolactone), PCL), block copolymers (Styrene-butadiene-styrene triblock copolymer, SBS), and plasticized semi-polymers (Polvinyl alcohol, PVA).
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Affiliation(s)
- Xuran Jin
- National Synchrotron Radiation Laboratory, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Wei Chen
- National Synchrotron Radiation Laboratory, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, 230026, China; Department of Accelerator Science and Engineering Physics, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, 230026, China.
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Fritzsching KJ, Duan P, Alberts EM, Tibabuzo Perdomo AM, Kenny P, Wilker JJ, Schmidt-Rohr K. Silk-Like Protein with Persistent Radicals Identified in Oyster Adhesive by Solid-State NMR. ACS APPLIED BIO MATERIALS 2019; 2:2840-2852. [DOI: 10.1021/acsabm.9b00243] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Keith J. Fritzsching
- Department of Chemistry, Brandeis University, Waltham, Massachusetts 02453, United States
| | - Pu Duan
- Department of Chemistry, Brandeis University, Waltham, Massachusetts 02453, United States
| | | | | | - Paul Kenny
- Baruch Marine Field Laboratory, University of South Carolina, P.O. Box 1630, Georgetown, South Carolina 29442, United States
| | | | - Klaus Schmidt-Rohr
- Department of Chemistry, Brandeis University, Waltham, Massachusetts 02453, United States
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Tekay E, Başkır S, Nugay N, Nugay T, Ortaç B, Şen S. Property enhancement in polypropylene ternary blend nanocomposites via a novel poly(ethylene oxide)-grafted polystyrene- block
-poly(ethylene/butylene)- block
-polystyrene toughener-compatibilizer system. POLYM INT 2018. [DOI: 10.1002/pi.5667] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Emre Tekay
- Department of Polymer Engineering; Yalova University; Yalova Turkey
| | - Serap Başkır
- Department of Chemistry and Polymer Research Center; Boğaziçi University; İstanbul Turkey
| | - Nihan Nugay
- Department of Chemistry and Polymer Research Center; Boğaziçi University; İstanbul Turkey
| | - Turgut Nugay
- Department of Chemistry and Polymer Research Center; Boğaziçi University; İstanbul Turkey
| | - Bülend Ortaç
- UNAM-National Nanotechnology Research Center, Institute of Materials Science and Nanotechnology; Bilkent University; Ankara Turkey
| | - Sinan Şen
- Department of Polymer Engineering; Yalova University; Yalova Turkey
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Bonhomme C, Gervais C, Laurencin D. Recent NMR developments applied to organic-inorganic materials. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2014; 77:1-48. [PMID: 24411829 DOI: 10.1016/j.pnmrs.2013.10.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Accepted: 10/17/2013] [Indexed: 06/03/2023]
Abstract
In this contribution, the latest developments in solid state NMR are presented in the field of organic-inorganic (O/I) materials (or hybrid materials). Such materials involve mineral and organic (including polymeric and biological) components, and can exhibit complex O/I interfaces. Hybrids are currently a major topic of research in nanoscience, and solid state NMR is obviously a pertinent spectroscopic tool of investigation. Its versatility allows the detailed description of the structure and texture of such complex materials. The article is divided in two main parts: in the first one, recent NMR methodological/instrumental developments are presented in connection with hybrid materials. In the second part, an exhaustive overview of the major classes of O/I materials and their NMR characterization is presented.
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Affiliation(s)
- Christian Bonhomme
- Laboratoire de Chimie de la Matière Condensée de Paris, UMR CNRS 7574, Université Pierre et Marie Curie, Paris 06, Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France.
| | - Christel Gervais
- Laboratoire de Chimie de la Matière Condensée de Paris, UMR CNRS 7574, Université Pierre et Marie Curie, Paris 06, Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France
| | - Danielle Laurencin
- Institut Charles Gerhardt de Montpellier, UMR5253, CNRS UM2 UM1 ENSCM, CC1701, Place Eugène Bataillon, 34095 Montpellier Cedex 05, France
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Domján A, Fodor C, Kovács S, Marek T, Iván B, Süvegh K. Anomalous Swelling Behavior of Poly(N-vinylimidazole)-l-Poly(tetrahydrofuran) Amphiphilic Conetwork in Water Studied by Solid-State NMR and Positron Annihilation Lifetime Spectroscopy. Macromolecules 2012. [DOI: 10.1021/ma301533g] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
| | | | - Szabolcs Kovács
- Department of Nuclear Chemistry, Eötvös Loránd Science University, P.O. Box 32, H-1518
Budapest, Hungary
| | - Tamás Marek
- Department
of Surface Modifications
and Nanostructures, Institute of Materials and Environmental Chemistry,
Research Centre for Natural Sciences, Hungarian Academy of Sciences, Pusztaszeri u. 59-67, P.O. Box 17, H-1525
Budapest, Hungary
| | | | - Károly Süvegh
- Department of Nuclear Chemistry, Eötvös Loránd Science University, P.O. Box 32, H-1518
Budapest, Hungary
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Rawal A, Kong X, Meng Y, Otaigbe JU, Schmidt-Rohr K. Reduced Crystallinity and Mobility of Nylon-6 Confined near the Organic–Inorganic Interface in a Phosphate Glass-Rich Nanocomposite Detected by 1H–13C NMR. Macromolecules 2011. [DOI: 10.1021/ma201756q] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aditya Rawal
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Xueqian Kong
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Yan Meng
- School of Polymers and High Performance Materials, University of Southern Mississippi, Hattiesburg, Mississippi 39406, United States
| | - Joshua U. Otaigbe
- School of Polymers and High Performance Materials, University of Southern Mississippi, Hattiesburg, Mississippi 39406, United States
| | - Klaus Schmidt-Rohr
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
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Simpson AJ, McNally DJ, Simpson MJ. NMR spectroscopy in environmental research: from molecular interactions to global processes. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2011; 58:97-175. [PMID: 21397118 DOI: 10.1016/j.pnmrs.2010.09.001] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2010] [Accepted: 09/17/2010] [Indexed: 05/30/2023]
Affiliation(s)
- André J Simpson
- Environmental NMR Center, Department of Chemistry, University of Toronto, Ontario, Canada.
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Zou Q, Zhang L, Li S, Gao X, Deng F. A solid-state NMR study of structure and segmental dynamics of poly(propylmethacryl-heptaisobutyl-pss)-co-styrene nanocomposites. J Colloid Interface Sci 2011; 355:334-41. [PMID: 21216408 DOI: 10.1016/j.jcis.2010.12.044] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Revised: 12/11/2010] [Accepted: 12/14/2010] [Indexed: 11/18/2022]
Abstract
The domain structure and mobility of poly(propylmethacryl-heptaisobutyl-pss)-co-styrene nanocomposites with different polyhedral oligomeric silsesquioxane (POSS) contents were investigated by various solid-state NMR techniques in combination with XRD. The NMR relaxation time measurements suggested that increasing POSS content trended to mobilize the chains in PS unit. Although XRD results showed that POSS was well dispersed into the polymer matrix, 2D WISE NMR indicated that the dispersion of POSS into the polymer matrix led to a composite structure composed of rigid and densely packed PS domain and mobile and amorphous POSS domain. This implied that the size of the two domains was very small. 2D HETCOR NMR implied that the distance between PS network and POSS unit gradually decreased when the POSS content successively increased. The dispersed POSS domain size determined by 2D spin-diffusion NMR experiments was increased with the POSS loading, being about 3.0, 3.9, 6.0 nm for the POSS15, POSS25 and POSS45 nanocomposites, respectively.
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Affiliation(s)
- Qin Zou
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Centre for Magnetic Resonance, Wuhan Institute of Physics and Mathematics, the Chinese Academy of Sciences, Wuhan 430071, PR China
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Solid-State Nuclear Magnetic Resonance Spectroscopy: A Review of Modern Techniques and Applications for Inorganic Polymers. J Inorg Organomet Polym Mater 2010. [DOI: 10.1007/s10904-010-9358-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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11
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Chen CY, Chen CC, Hou SS. Synthesis and characterization of poly(acrylonitrile)/montmorillonite nanocomposites from surface-initiated redox polymerization. J Appl Polym Sci 2010. [DOI: 10.1002/app.31022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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12
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Mirau PA, Lyons M. Intermolecular Interactions and Dynamics in Polymer/C60 Blends. Macromolecules 2009. [DOI: 10.1021/ma9022313] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Peter A. Mirau
- Nanostructural and Biological Materials Branch, Materials Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433
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Domján A, Bajdik J, Pintye-Hódi K. Understanding of the Plasticizing Effects of Glycerol and PEG 400 on Chitosan Films Using Solid-State NMR Spectroscopy. Macromolecules 2009. [DOI: 10.1021/ma8021234] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Attila Domján
- Institute of Structural Chemistry, Chemical Research Center, Hungarian Academy of Sciences, H-1025 Budapest, Pusztaszeri út 59-67, Hungary
| | - János Bajdik
- Department of Pharmaceutical Technology, University of Szeged, H-6720 Szeged, Eötvös u. 6, Hungary
| | - Klára Pintye-Hódi
- Department of Pharmaceutical Technology, University of Szeged, H-6720 Szeged, Eötvös u. 6, Hungary
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14
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Misra R, Alidedeoglu AH, Jarrett WL, Morgan SE. Molecular miscibility and chain dynamics in POSS/polystyrene blends: Control of POSS preferential dispersion states. POLYMER 2009. [DOI: 10.1016/j.polymer.2009.03.057] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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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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16
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Intercalation of poly(methyl methacrylate) into tyramine-modified layered silicates through hydrogen-bonding interaction. Eur Polym J 2008. [DOI: 10.1016/j.eurpolymj.2008.02.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Yang Y, Xu JT, Du BY, Xue L, Fan ZQ, Mai SM, Ryan AJ. Morphological change of asymmetric oxyethylene/oxybutylene block copolymers induced by montmorillonite. J Chem Phys 2008; 128:154902. [DOI: 10.1063/1.2897754] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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19
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Valsesia P, Beretta M, Bracco S, Comotti A, Sozzani P. Polymer/silica nanocomposite micro-objects as a key point for silica-to-polymer shape replication. ACTA ACUST UNITED AC 2008. [DOI: 10.1039/b809866b] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Brus J, Urbanová M, Strachota A. Epoxy Networks Reinforced with Polyhedral Oligomeric Silsesquioxanes: Structure and Segmental Dynamics as Studied by Solid-State NMR. Macromolecules 2007. [DOI: 10.1021/ma702140g] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jiri Brus
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
| | - Martina Urbanová
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
| | - Adam Strachota
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
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21
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Mao Q, Schleidt S, Zimmermann H, Jeschke G. Molecular Motion in Surfactant Layers Inside Polymer Composites with Synthetical Magadiite. MACROMOL CHEM PHYS 2007. [DOI: 10.1002/macp.200700183] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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22
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Schmidt-Rohr K, Rawal A, Fang XW. A new NMR method for determining the particle thickness in nanocomposites, using T2,H-selective X{1H} recoupling. J Chem Phys 2007; 126:054701. [PMID: 17302492 DOI: 10.1063/1.2429069] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A new nuclear magnetic resonance approach for characterizing the thickness of phosphate, silicate, carbonate, and other nanoparticles in organic-inorganic nanocomposites is presented. The particle thickness is probed using the strongly distant-dependent dipolar couplings between the abundant protons in the organic phase and X nuclei (31P, 29Si, 13C, 27Al, 23Na, etc.) in the inorganic phase. This approach requires pulse sequences with heteronuclear dephasing only by the polymer or surface protons that experience strong homonuclear interactions, but not by dispersed OH or water protons in the inorganic phase, which have long transverse relaxation times T2,H. This goal is achieved by heteronuclear recoupling with dephasing by strong homonuclear interactions of protons (HARDSHIP). The pulse sequence alternates heteronuclear recoupling for approximately 0.15 ms with periods of homonuclear dipolar dephasing that are flanked by canceling 90 degrees pulses. The heteronuclear evolution of the long-T2,H protons is refocused within two recoupling periods, so that 1H spin diffusion cannot significantly dephase these coherences. For the short-T2,H protons of a relatively immobile organic matrix, the heteronuclear dephasing rate depends simply on the heteronuclear second moment. Homonuclear interactions do not affect the dephasing, even though no homonuclear decoupling is applied, because long-range 1H-X dipolar couplings approximately commute with short-range 1H-1H couplings, and heteronuclear recoupling periods are relatively short. This is shown in a detailed analysis based on interaction representations. The algorithm for simulating the dephasing data is described. The new method is demonstrated on a clay-polymer nanocomposite, diamond nanocrystals with protonated surfaces, and the bioapatite-collagen nanocomposite in bone, as well as pure clay and hydroxyapatite. The diameters of the nanoparticles in these materials range between 1 and 5 nm. Simulations show that spherical particles of up to 10 nm diameter can be characterized quite easily.
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Affiliation(s)
- K Schmidt-Rohr
- Ames Laboratory, and Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA.
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23
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Nguyen QT, Baird DG. Preparation of polymer–clay nanocomposites and their properties. ADVANCES IN POLYMER TECHNOLOGY 2007. [DOI: 10.1002/adv.20079] [Citation(s) in RCA: 225] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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24
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Brus J, Urbanová M, Kelnar I, Kotek J. A Solid-State NMR Study of Structure and Segmental Dynamics of Semicrystalline Elastomer-Toughened Nanocomposites. Macromolecules 2006. [DOI: 10.1021/ma0604946] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jiri Brus
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06 Prague 6, Czech Republic
| | - Martina Urbanová
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06 Prague 6, Czech Republic
| | - Ivan Kelnar
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06 Prague 6, Czech Republic
| | - Jiří Kotek
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06 Prague 6, Czech Republic
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Gougeon RD, Reinholdt M, Delmotte L, Miehé-Brendlé J, Jeandet P. Solid-state NMR investigation on the interactions between a synthetic montmorillonite and two homopolypeptides. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2006; 29:322-9. [PMID: 16332432 DOI: 10.1016/j.ssnmr.2005.10.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2005] [Revised: 10/20/2005] [Indexed: 05/05/2023]
Abstract
Interactions of two homopolypeptides (polylysine and polyglutamic acid) with a synthetic montmorillonite were studied by 1H MAS, 1H-27Al HETCOR and 1H-13C CP-MAS NMR experiments. 1H-27Al HETCOR with 1H spin-diffusion NMR appears to be a powerful probe for the identification of the polypeptide fragments, which interact with the montmorillonite interlayer surfaces. In particular, selective interactions were observed between the polypeptide side-chains and the montmorillonite octahedral aluminum atoms. 1H-13C CP-MAS NMR experiments were used to assess the dynamics of the two polypeptides through the measurement of the t(1/2) characteristic time of selected carbons. Results indicate that the local mobility of the side chains and their interaction with the montmorillonite layers depend on the nature of the adsorbed polypeptides.
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Affiliation(s)
- Régis D Gougeon
- Laboratoire d'Ingénierie Moléculaire et Sensorielle des Aliments et des Produits de Santé, UPRES EA 581, ENSBANA, Université de Bourgogne, 1 Esplanade Erasme, 21079 Dijon, France.
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26
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Chen Q, Schmidt-Rohr K. Measurement of the local 1H spin-diffusion coefficient in polymers. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2006; 29:142-52. [PMID: 16263249 DOI: 10.1016/j.ssnmr.2005.09.008] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2005] [Revised: 09/02/2005] [Indexed: 05/05/2023]
Abstract
Proton spin diffusion is widely used to determine domain sizes in heterogeneous organic solids. For an accurate analysis, spin diffusion coefficients are required. However, in most cases they are not directly measured, but instead derived from model systems. The effects of magic-angle spinning (MAS), mobility, or spin-lock fields on spin-diffusion coefficients have also been difficult to quantify. In this work, direct measurement of local (1)H spin-diffusion coefficients in any rigid polymer is achieved in experiments with heteronuclear dephasing of the (1)H magnetization, a mixing time for (1)H spin diffusion, and (13)C detection after cross-polarization. In the presence of (1)H homonuclear decoupling and (13)C 180 degrees-pulse recoupling, each (13)C spin dephases a significant number (3-20) of protons, depending on the dephasing time. For (13)C and other sufficiently dilute heteronuclei, the dephasing of the protons is described by simple spin-pair REDOR curves. As a result, every (13)C nucleus will "burn" a spherical hole of known diameter and profile into the proton magnetization distribution. (1)H spin diffusion into the hole during the mixing time can be monitored and simulated accurately for every resolved (13)C site, with the spin-diffusion coefficient as the only significant unknown parameter. By varying the dephasing time, holes with diameters of 0.4-0.8 nm can be burned into the proton magnetization profile and thus the dependence of the local spin-diffusion coefficients on the proton density or partial mobility can be explored. The effects of transverse or magic-angle spin-lock fields on spin diffusion can be quantified conveniently by this method. Analytical and numerical fits yield short-range spin-diffusion coefficients of 0.2-0.5 nm(2)/ms on the 0.5-nm scale, which is smaller than the value of 0.8 nm(2)/ms for organic solids previously measured on the 10-nm scale.
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Affiliation(s)
- Q Chen
- Ames Laboratory and Department of Chemistry, Iowa State University, Ames, IA 50011, USA
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Moncada E, Quijada R, Retuert J. Comparative effect of metallocene and Ziegler-Natta polypropylene on the exfoliation of montmorillonite and hectorite clays to obtain nanocomposites. J Appl Polym Sci 2006. [DOI: 10.1002/app.24639] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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28
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UV Curable Acrylate Nanocomposites: Properties and Applications. JOURNAL OF POLYMER RESEARCH 2005. [DOI: 10.1007/s10965-005-4339-z] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Huang W, Han CD. Dispersion Characteristics and Rheology of Organoclay Nanocomposites Based on a Segmented Main-Chain Liquid-Crystalline Polymer Having Pendent Pyridyl Group. Macromolecules 2005. [DOI: 10.1021/ma051470m] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wenyi Huang
- Department of Polymer Engineering, The University of Akron, Akron, Ohio 44325
| | - Chang Dae Han
- Department of Polymer Engineering, The University of Akron, Akron, Ohio 44325
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Hucher C, Eustache RP, Beaume F, Tekely P. Motional Heterogeneity in Poly(ether-block-amide) Copolymers As Revealed by Solid-State NMR. Macromolecules 2005. [DOI: 10.1021/ma051625q] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Catherine Hucher
- ARKEMA, Centre d'Etude de Recherche et Développement, 27470 Serquigny, France, and Methodologie RMN UMR CNRS 7565, Université H. Poincaré, 54506 Vandoeuvre-lès-Nancy, France
| | - René-Paul Eustache
- ARKEMA, Centre d'Etude de Recherche et Développement, 27470 Serquigny, France, and Methodologie RMN UMR CNRS 7565, Université H. Poincaré, 54506 Vandoeuvre-lès-Nancy, France
| | - François Beaume
- ARKEMA, Centre d'Etude de Recherche et Développement, 27470 Serquigny, France, and Methodologie RMN UMR CNRS 7565, Université H. Poincaré, 54506 Vandoeuvre-lès-Nancy, France
| | - Piotr Tekely
- ARKEMA, Centre d'Etude de Recherche et Développement, 27470 Serquigny, France, and Methodologie RMN UMR CNRS 7565, Université H. Poincaré, 54506 Vandoeuvre-lès-Nancy, France
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Bockstaller MR, Mickiewicz RA, Thomas EL. Block Copolymer Nanocomposites: Perspectives for Tailored Functional Materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2005; 17:1331-1349. [PMID: 34412432 DOI: 10.1002/adma.200500167] [Citation(s) in RCA: 562] [Impact Index Per Article: 29.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2004] [Accepted: 02/17/2005] [Indexed: 05/28/2023]
Abstract
Heterogeneous materials in which the characteristic length scale of the filler material is in the nanometer range-i.e., nanocomposites-is currently one of the fastest growing areas of materials research. Polymer nanocomposites have expanded beyond the original scope of polymer-nanocrystal dispersions for refractive-index tuning or clay-filled homopolymers primarily pursued for mechanical reinforcement, to include a wide range of applications. This article highlights recent research efforts in the field of structure formation in block copolymer-based nanocomposite materials, and points out opportunities for novel materials based on inclusion of different types of nanoparticles. The use of block copolymers instead of homopolymers as the matrix is shown to afford opportunities for controlling the spatial and orientational distribution of the nanoelements. This, in turn, allows much more sophisticated tailoring of the overall properties of the composite material.
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Affiliation(s)
- M R Bockstaller
- Department of Materials Science and Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213, USA
| | - R A Mickiewicz
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - E L Thomas
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
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Chen Q, Hou SS, Schmidt-Rohr K. A simple scheme for probehead background suppression in one-pulse 1H NMR. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2004; 26:11-5. [PMID: 15157534 DOI: 10.1016/j.ssnmr.2003.08.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2003] [Revised: 08/07/2003] [Indexed: 05/13/2023]
Abstract
A very simple method for reducing probehead background signal in one-pulse 1H nuclear magnetic resonance (NMR) spectra is presented. Two one-pulse spectra are recorded, the first with pulse length tp1, the second with an L-times longer pulse, e.g. with L = 2. The second spectrum scaled by 1/L is subtracted from the first. Since the weak pulses experienced by spins outside the coil are in the linear regime, the background from outside the coil is effectively subtracted out. The background suppression efficiency is approximately 1.5b2, where b is the ratio of the B1 field inside the coil relative to that outside the coil. Experimentally, background suppression by at least a factor of 10 was achieved. Examples of background suppression in 1H wideline as well as 1H fast magic-angle spinning (MAS) one-pulse spectra of clay and polymer samples are shown.
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Affiliation(s)
- Q Chen
- Ames Laboratory, Iowa State University, Gilman Hall, 50011-3111, USA
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Asano A, Shimizu M, Kurotsu T. Effect of Paramagnetic Fe3+onT1Hin PVA/montmorillonite-clay Nanocomposites. CHEM LETT 2004. [DOI: 10.1246/cl.2004.816] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Kudryavtsev YV, Govorun EN, Litmanovich AD, Fischer HR. Polymer Melt Intercalation in Clay Modified by Diblock Copolymers. MACROMOL THEOR SIMUL 2004. [DOI: 10.1002/mats.200400002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Brus J, Milena Špírková,, Hlavatá D, Strachota A. Self-Organization, Structure, Dynamic Properties, and Surface Morphology of Silica/Epoxy Films As Seen by Solid-State NMR, SAXS, and AFM. Macromolecules 2004. [DOI: 10.1021/ma035608h] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jiri Brus
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
| | - Milena Špírková,
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
| | - Drahomíra Hlavatá
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
| | - Adam Strachota
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
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Sinha Ray S, Okamoto M. Polymer/layered silicate nanocomposites: a review from preparation to processing. Prog Polym Sci 2003. [DOI: 10.1016/j.progpolymsci.2003.08.002] [Citation(s) in RCA: 5355] [Impact Index Per Article: 255.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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