151
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Trinh GH, Desloir M, Dutertre F, Majesté JC, Dalmas F, Baeza GP. Isostructural softening of the filler network in SBR/silica nanocomposites. SOFT MATTER 2019; 15:3122-3132. [PMID: 30806422 DOI: 10.1039/c8sm02592d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
A new formulation of the widely used nanocomposites based on SBR (ca. 250 kg mol-1) and fractal silica fillers is proposed by substituting the usual covering and coupling agents with short chains (4 kg mol-1) of polypropylene glycol (PPG). We study in a systematic way the structural evolution and the changes in the linear and non-linear mechanical properties of two series of samples varying: (i) the silica volume fraction (Φsi = 0, 5, 10 and 15 vol%) in PPG-free samples and (ii) the amount of PPG for a given silica content Φsi = 15 vol%. While the first series is used as a reference, showing expected trends (e.g. the enhancement of the plateau modulus), the second series reveals in contrast, a surprising PPG insensitivity, both in terms of the filler structure (investigated by means of SAXS, SEM and TEM) and properties "at rest" (linear rheology). However, increasing the strain amplitude (both in shear and tensile tests) discloses the great effect of the oligomers, opening possibly the way to a fruitful decorrelation between the low and high deformation performances of tires. Although this study is limited to the investigation of uncrosslinked materials, it will be extended to more operative industrial formulations in due course.
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Affiliation(s)
- Giang Hoang Trinh
- Univ Lyon, INSA-Lyon, CNRS, MATEIS, UMR 5510, F-69621, Villeurbanne, France.
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152
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Midya J, Cang Y, Egorov SA, Matyjaszewski K, Bockstaller MR, Nikoubashman A, Fytas G. Disentangling the Role of Chain Conformation on the Mechanics of Polymer Tethered Particle Materials. NANO LETTERS 2019; 19:2715-2722. [PMID: 30913883 PMCID: PMC6463242 DOI: 10.1021/acs.nanolett.9b00817] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 03/18/2019] [Indexed: 05/22/2023]
Abstract
The linear elastic properties of isotropic materials of polymer tethered nanoparticles (NPs) are evaluated using noncontact Brillouin light spectroscopy. While the mechanical properties of dense brush materials follow predicted trends with NP composition, a surprising increase in elastic moduli is observed in the case of sparsely grafted particle systems at approximately equal NP filling ratio. Complementary molecular dynamics simulations reveal that the stiffening is caused by the coil-like conformations of the grafted chains, which lead to stronger polymer-polymer interactions compared to densely grafted NPs with short chains. Our results point to novel opportunities to enhance the physical properties of composite materials by the strategic design of the "molecular architecture" of constituents to benefit from synergistic effects relating to the organization of the polymer component.
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Affiliation(s)
- Jiarul Midya
- Institute
of Physics, Johannes Gutenberg University
Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - Yu Cang
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Sergei A. Egorov
- Department
of Chemistry, University of Virginia, McCormick Road, Charlottesville, Virginia 22904-4319, United States
| | - Krzysztof Matyjaszewski
- Chemistry
Department, Carnegie Mellon University, 4400 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Michael R. Bockstaller
- Department
of Materials Science and Engineering, Carnegie
Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Arash Nikoubashman
- Institute
of Physics, Johannes Gutenberg University
Mainz, Staudingerweg 7, 55128 Mainz, Germany
| | - George Fytas
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
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153
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Tanc B, Orakdogen N. A versatile strategy for mechanically durable nanocomposite cryogels based on cationic (alkyl)methacrylates and hydrophilic bentonite via freezing (cryo)polymerization. SOFT MATTER 2019; 15:3208-3226. [PMID: 30912566 DOI: 10.1039/c9sm00197b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A simple strategy for the preparation of organic-inorganic (alkyl)methacrylate-based nanocomposite gels was established. The preparation procedure was based on free-radical copolymerization of cationic monomer N,N-dimethylaminoethyl methacrylate (DMAEMA) in the presence of a low amount of ionic comonomer 2-acrylamido-2-methyl-propanosulfonic acid (AMPS), nanoclay bentonite (BENT) and diethyleneglycol dimethacrylate (DEGDMA) as a chemical crosslinker. The parameters of equilibrium volume swelling, initial swelling rate, diffusional exponent, and early- and late-time diffusion coefficients were evaluated from the swelling measurements in salt solutions. PDMAEMA retained its own characteristics regardless of the amounts of ionic comonomer AMPS and nanoclay bentonite. The prepared nanocomposite cryogels/hydrogels were found to be pH and temperature-responsive. The elastic moduli and compressibility of the nanocomposite NC/BENTm-Cgels were much higher than those of NC/BENTm-Hgels. The effective crosslink density distribution of the nanocomposite NC/BENTm-Hgels was evaluated from the elastic moduli data of the as-prepared state and the degree of crosslinking was described by a quadratic polynomial as a function of the clay concentration. At high clay content, the nanocomposite NC/BENTm gels exhibited a lower swelling degree, and thus a higher crosslinking density than the clay-free gels. Both NC/BENTm Hgels and Cgels exhibited obvious pH and temperature double sensitiveness; the equilibrium degree of swelling decreased as the solution's pH or the swelling temperature increased. The power law exponent values obtained from dynamic swelling in aqueous Na2SO4 solution indicated that the sorption mechanism of both the nanocomposite NC/BENTm-Hgel and NC/BENTm-Cgel samples was Fickian controlled. Overall, this study successfully establishes the thermodynamic relations between the physico-mechanical behavior and characteristic network parameters of (alkyl)methacrylate-based nanocomposite gels prepared at various BENT concentrations.
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Affiliation(s)
- Beril Tanc
- Istanbul Technical University, Department of Chemistry, Soft Materials Research Laboratory, 34469, Istanbul, Maslak, Turkey.
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154
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Graf D, Burchard S, Crespo J, Megnin C, Gutsch S, Zacharias M, Hanemann T. Influence of Al₂O₃ Nanoparticle Addition on a UV Cured Polyacrylate for 3D Inkjet Printing. Polymers (Basel) 2019; 11:polym11040633. [PMID: 30959918 PMCID: PMC6523912 DOI: 10.3390/polym11040633] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 03/29/2019] [Accepted: 04/04/2019] [Indexed: 12/20/2022] Open
Abstract
The brittleness of acrylic photopolymers, frequently used in 3D Inkjet printing, limits their utilization in structural applications. In this study, a process was developed for the production and characterization of an alumina-enhanced nanocomposite with improved mechanical properties for Inkjet printing. Ceramic nanoparticles with an average primary particle size (APPS) of 16 nm and 31 nm, which was assessed via high-resolution scanning electron microscopy (HRSEM), were functionalized with 3.43 and 5.59 mg/m2 3-(trimethoxysilyl)propyl methacrylate (MPS), respectively, while being ground in a ball mill. The suspensions of the modified fillers in a newly formulated acrylic mixture showed viscosities of 14 and 7 mPa∙s at the printing temperature of 60 °C. Ink-jetting tests were conducted successfully without clogging the printing nozzles. Tensile tests of casted specimens showed an improvement of the tensile strength and elongation at break in composites filled with 31 nm by 10.7% and 74.9%, respectively, relative to the unfilled polymer.
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Affiliation(s)
- Dennis Graf
- Institute for Applied Materials, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany.
- Laboratory for Materials Processing, University of Freiburg, 79110 Freiburg, Germany.
| | - Sven Burchard
- Laboratory for Materials Processing, University of Freiburg, 79110 Freiburg, Germany.
| | - Julian Crespo
- TECNAN, Tecnología Navarra de Nanoproductos S.L, Industrial Area Perguita, C/A No. 1, 31210 Los Arcos, Spain.
| | - Christof Megnin
- Institute of Microstructure Technology, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany.
| | - Sebastian Gutsch
- Laboratory for Nanotechnology, University of Freiburg, 79110 Freiburg, Germany.
| | - Margit Zacharias
- Laboratory for Nanotechnology, University of Freiburg, 79110 Freiburg, Germany.
| | - Thomas Hanemann
- Institute for Applied Materials, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany.
- Laboratory for Materials Processing, University of Freiburg, 79110 Freiburg, Germany.
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155
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Klonos PA, Goncharuk OV, Pakhlov EM, Sternik D, Deryło-Marczewska A, Kyritsis A, Gun’ko VM, Pissis P. Morphology, Molecular Dynamics, and Interfacial Phenomena in Systems Based on Silica Modified by Grafting Polydimethylsiloxane Chains and Physically Adsorbed Polydimethylsiloxane. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00155] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Panagiotis A. Klonos
- Department of Physics, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece
| | - Olena V. Goncharuk
- Chuiko Institute of Surface Chemistry, 17 General Naumov Street, 03164 Kiev, Ukraine
| | - Eugeniy M. Pakhlov
- Chuiko Institute of Surface Chemistry, 17 General Naumov Street, 03164 Kiev, Ukraine
| | - Dariusz Sternik
- Maria Curie-Sklodowska University, M. Curie-Sklodowska Sq. 3, 20-031 Lublin, Poland
| | | | - Apostolos Kyritsis
- Department of Physics, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece
| | - Volodymyr M. Gun’ko
- Chuiko Institute of Surface Chemistry, 17 General Naumov Street, 03164 Kiev, Ukraine
| | - Polycarpos Pissis
- Department of Physics, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece
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156
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Khavani M, Izadyar M, Housaindokht MR. A combined MD/QM study on the sensing mechanism of Pb2+ by glutathione functionalized gold nanoparticles. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.02.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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157
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Martin HJ, White BT, Yuan G, Saito T, Dadmun MD. Relative Size of the Polymer and Nanoparticle Controls Polymer Diffusion in All-Polymer Nanocomposites. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02596] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Halie J. Martin
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - B. Tyler White
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Guangcui Yuan
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
- University of Georgetown, Washington, D.C. 20057, United States
| | - Tomonori Saito
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Mark D. Dadmun
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
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158
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Kulshreshtha A, Modica KJ, Jayaraman A. Impact of Hydrogen Bonding Interactions on Graft–Matrix Wetting and Structure in Polymer Nanocomposites. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02666] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Arjita Kulshreshtha
- Department of Chemical and Biomolecular Engineering, 150 Academy
Street, Colburn Laboratory, University of Delaware, Newark, Delaware 19716, United States
| | - Kevin J. Modica
- Department of Chemical and Biomolecular Engineering, 150 Academy
Street, Colburn Laboratory, University of Delaware, Newark, Delaware 19716, United States
| | - Arthi Jayaraman
- Department of Chemical and Biomolecular Engineering, 150 Academy
Street, Colburn Laboratory, University of Delaware, Newark, Delaware 19716, United States
- Department of Materials Science and Engineering, 201 Dupont Hall, University of Delaware, Newark, Delaware 19716, United States
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159
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The use of glycerol as reactive solvent in the one-pot synthesis of antibacterial hybrid organic–inorganic coatings with photothermal activity. Colloid Polym Sci 2019. [DOI: 10.1007/s00396-019-04490-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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160
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Terzopoulou Z, Klonos PA, Kyritsis A, Tziolas A, Avgeropoulos A, Papageorgiou GZ, Bikiaris DN. Interfacial interactions, crystallization and molecular mobility in nanocomposites of Poly(lactic acid) filled with new hybrid inclusions based on graphene oxide and silica nanoparticles. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.01.041] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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161
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Prasad K, Zhou R, Zhou R, Schuessler D, Ostrikov KK, Bazaka K. Cosmetic reconstruction in breast cancer patients: Opportunities for nanocomposite materials. Acta Biomater 2019; 86:41-65. [PMID: 30576863 DOI: 10.1016/j.actbio.2018.12.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 12/08/2018] [Accepted: 12/17/2018] [Indexed: 12/23/2022]
Abstract
The most common malignancy in women, breast cancer remains a major medical challenge that affects the life of thousands of patients every year. With recognized benefits to body image and self-esteem, the use of synthetic mammary implants for elective cosmetic augmentation and post-mastectomy reconstruction continues to increase. Higher breast implant use leads to an increased occurrence of implant-related complications associated with implant leakage and rupture, capsular contracture, necrosis and infections, which include delayed healing, pain, poor aesthetic outcomes and the need for revision surgeries. Along with the health status of the implant recipient and the skill of the surgeon, the properties of the implant determine the likelihood of implant-related complications and, in doing so, specific patient outcomes. This paper will review the challenges associated with the use of silicone, saline and "gummy bear" implants in view of their application in patients recovering from breast cancer-related mastectomy, and investigate the opportunities presented by advanced functional nanomaterials in meeting these challenges and potentially opening new dimensions for breast reconstruction. STATEMENT OF SIGNIFICANCE: Breast cancer is a significant cause of morbidity and mortality in women worldwide, which is difficult to prevent or predict, and its treatment carries long-term physiological and psychological consequences. Post-mastectomy breast reconstruction addresses the cosmetic aspect of cancer treatment. Yet, drawbacks of current implants contribute to the development of implant-associated complications, which may lead to prolonged patient care, pain and loss of function. Nanomaterials can help resolve the intrinsic biomechanical mismatch between implant and tissues, enhance mechanical properties of soft implantable materials, and provide an alternative avenue for controlled drug delivery. Here, we explore advances in the use of functionalized nanomaterials to enhance the properties of breast implants, with representative examples that highlight the utility of nanomaterials in addressing key challenges associated with breast reconstruction.
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Affiliation(s)
- Karthika Prasad
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia; CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield, NSW 2070, Australia
| | - Renwu Zhou
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia; CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield, NSW 2070, Australia
| | - Rusen Zhou
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia; CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield, NSW 2070, Australia
| | - David Schuessler
- Product Development, Allergan, 2525 Dupont Drive, Irvine, CA 92612, United States
| | - Kostya Ken Ostrikov
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia; CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield, NSW 2070, Australia
| | - Kateryna Bazaka
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia; CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield, NSW 2070, Australia.
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162
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Wang Y, Maurel G, Couty M, Detcheverry F, Merabia S. Implicit Medium Model for Fractal Aggregate Polymer Nanocomposites: Linear Viscoelastic Properties. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02455] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yang Wang
- CNRS, Institut Lumière Matière, Univ Lyon, Université Claude Bernard Lyon 1, F-69622 Villeurbanne, France
- MFP MICHELIN 23, Place des Carmes-Déchaux, Cedex 9 63040 Clermont-Ferrand, France
| | - Gaëtan Maurel
- MFP MICHELIN 23, Place des Carmes-Déchaux, Cedex 9 63040 Clermont-Ferrand, France
| | - Marc Couty
- MFP MICHELIN 23, Place des Carmes-Déchaux, Cedex 9 63040 Clermont-Ferrand, France
| | - François Detcheverry
- CNRS, Institut Lumière Matière, Univ Lyon, Université Claude Bernard Lyon 1, F-69622 Villeurbanne, France
| | - Samy Merabia
- CNRS, Institut Lumière Matière, Univ Lyon, Université Claude Bernard Lyon 1, F-69622 Villeurbanne, France
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163
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Zhang Q, Xu H, Song Y, Zheng Q. Rheological behavior of fumed silica filled polyethylene oxide. ACTA ACUST UNITED AC 2019. [DOI: 10.1002/polb.24794] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Qingxu Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering; Zhejiang University; Hangzhou, 310027 China
| | - Huilong Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering; Zhejiang University; Hangzhou, 310027 China
| | - Yihu Song
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering; Zhejiang University; Hangzhou, 310027 China
| | - Qiang Zheng
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering; Zhejiang University; Hangzhou, 310027 China
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164
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Hu X, Wang Y, Xu M, Zhang L, Zhang J, Dong W. Development of photocrosslinked salecan composite hydrogel embedding titanium carbide nanoparticles as cell scaffold. Int J Biol Macromol 2019; 123:549-557. [DOI: 10.1016/j.ijbiomac.2018.11.125] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 10/31/2018] [Accepted: 11/13/2018] [Indexed: 12/24/2022]
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165
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Crack growth resistance in rubber composites with controlled Interface bonding and interphase content. JOURNAL OF POLYMER RESEARCH 2019. [DOI: 10.1007/s10965-019-1709-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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166
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Smith SM, Simmons DS. Poisson ratio mismatch drives low-strain reinforcement in elastomeric nanocomposites. SOFT MATTER 2019; 15:656-670. [PMID: 30617354 DOI: 10.1039/c8sm02333f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Introduction of nanoparticulate additives can dramatically impact elastomer mechanical response, with large enhancements in modulus, toughness, and strength. Despite the societal importance of these effects, their mechanistic origin remains unsettled. Here, using a combination of theory and molecular dynamics simulation, we show that low-strain extensional reinforcement of elastomers is driven by a nanoparticulate-jamming-induced suppression in the composite Poisson ratio. This suppression forces an increase in rubber volume with extensional deformation, effectively converting a portion of the rubber's bulk modulus into an extensional modulus. A theory describing this effect is shown to interrelate the Poisson ratio and modulus across a matrix of simulated elastomeric nanocomposites of varying loading and nanoparticle structure. This model provides a design rule for structured nanoparticulates that maximizes elastomer mechanical response via suppression of the composite Poisson ratio. It also positions elastomeric nanocomposites as having a qualitatively different character than Poisson-ratio-matched plastic nanocomposites, where this mechanism is absent.
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Affiliation(s)
- Scott M Smith
- Department of Polymer Engineering, University of Akron, Akron, Ohio 44325, USA
| | - David S Simmons
- Department of Chemical and Biomedical Engineering, University of South Florida, Tampa, Florida 33620, USA.
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167
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Androulaki K, Chrissopoulou K, Prevosto D, Labardi M, Anastasiadis SH. Structure and Dynamics of Biobased Polyester Nanocomposites. Biomacromolecules 2019; 20:164-176. [PMID: 30485746 DOI: 10.1021/acs.biomac.8b01231] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The structure and the dynamics of two bio-based polyester polyols are investigated in the bulk and close to surfaces in polymer/layered silicate nanocomposites. The morphology of the neat polymers as well as the structure of the nanohybrids are investigated with X-ray diffraction and their thermal properties are studied by differential scanning calorimetry. One of the investigated polyesters is amorphous, whereas the second one is a semicrystalline polymer with intriguing thermal behavior. Hybrids have been synthesized over a broad range of compositions and intercalated structures are always obtained. The thermal transitions in the nanocomposites are observed only when the polymers are in excess outside the completely filled galleries. The glass transition, whenever it can be resolved, appears insensitive to the presence of the inorganic material, whereas the way the crystallization takes place depends on the composition of the nanohybrid. Dielectric relaxation spectroscopy was utilized to study the polymer dynamics. It revealed multiple relaxation processes for the neat polymers both below and above their glass transition temperatures, whereas in the nanocomposites, similarities and differences are observed depending on the specific mode of the dynamic process.
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Affiliation(s)
- Krystalenia Androulaki
- Institute of Electronic Structure and Laser , Foundation for Research and Technology - Hellas , P.O. Box 1527, 711 10 Heraklion Crete , Greece.,Department of Chemistry , University of Crete , P.O. Box 2208, 710 03 Heraklion Crete , Greece
| | - Kiriaki Chrissopoulou
- Institute of Electronic Structure and Laser , Foundation for Research and Technology - Hellas , P.O. Box 1527, 711 10 Heraklion Crete , Greece
| | - Daniele Prevosto
- CNR-IPCF, Department of Physics , University of Pisa , 56126 Pisa , Italy
| | | | - Spiros H Anastasiadis
- Institute of Electronic Structure and Laser , Foundation for Research and Technology - Hellas , P.O. Box 1527, 711 10 Heraklion Crete , Greece.,Department of Chemistry , University of Crete , P.O. Box 2208, 710 03 Heraklion Crete , Greece
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168
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Mohamadnia Z, Azimnavahsi L. New strategy for preparation of LLDPE nanocomposites through tandem catalytic system. J Appl Polym Sci 2019. [DOI: 10.1002/app.47497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Zahra Mohamadnia
- Department of ChemistryInstitute for Advanced Studies in Basic Sciences (IASBS) Zanjan 45137‐66731 Iran
| | - Leila Azimnavahsi
- Department of ChemistryInstitute for Advanced Studies in Basic Sciences (IASBS) Zanjan 45137‐66731 Iran
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169
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Trazkovich AJ, Wendt MF, Hall LM. Effect of Copolymer Sequence on Local Viscoelastic Properties near a Nanoparticle. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02136] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Alex J. Trazkovich
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 140 W 19th Ave., Columbus, Ohio 43210, United States
- Cooper Tire & Rubber Company, 701 Lima Ave., Findlay, Ohio 45840, United States
| | - Mitchell F. Wendt
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 140 W 19th Ave., Columbus, Ohio 43210, United States
| | - Lisa M. Hall
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 140 W 19th Ave., Columbus, Ohio 43210, United States
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170
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Pastore R, David A, Casalegno M, Greco F, Raos G. Influence of wall heterogeneity on nanoscopically confined polymers. Phys Chem Chem Phys 2019; 21:772-779. [PMID: 30548037 DOI: 10.1039/c8cp06757k] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We investigate via molecular dynamics simulations the behaviour of a polymer melt confined between surfaces with increasing spatial correlation (patchiness) of weakly and strongly interacting sites. Beyond a critical patchiness, we find a dramatic dynamic decoupling, characterized by a steep growth of the longest relaxation time and a constant diffusion coefficient. This arises from dynamic heterogeneities induced by the walls in the adjacent polymer layers, leading to the coexistence of fast and slow chain populations. Structural variations are also present, but they are not easy to detect. Our work opens the way to a better understanding of adhesion, friction, rubber reinforcement by fillers, and many other open issues involving the dynamics of polymeric materials on rough, chemically heterogeneous and possibly "dirty" surfaces.
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Affiliation(s)
- Raffaele Pastore
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, P.le Tecchio 80, Napoli 80125, Italy.
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171
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Li S, Zhang Z, Hou G, Liu J, Gao Y, Coates P, Zhang L. Self-assembly and structural manipulation of diblock-copolymer grafted nanoparticles in a homopolymer matrix. Phys Chem Chem Phys 2019; 21:11785-11796. [DOI: 10.1039/c9cp00872a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Detailed coarse-grained molecular dynamics simulations are performed to investigate the structural and mechanical properties of nanoparticles (NPs) grafted with an amphiphilic AB diblock copolymer, with the A-block being compatible with NPs and the B-block being miscible with a homopolymer matrix.
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Affiliation(s)
- Sai Li
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
| | - Zhiyu Zhang
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
| | - Guanyi Hou
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
| | - Jun Liu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
- Beijing Engineering Research Center of Advanced Elastomers
- Beijing University of Chemical Technology
| | - Yangyang Gao
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
- Beijing Engineering Research Center of Advanced Elastomers
- Beijing University of Chemical Technology
| | - Phil Coates
- Joint-International Laboratory for Soft Matter Technologies Bradford-BUCT
- 100029 Beijing
- People's Republic of China
| | - Liqun Zhang
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
- Beijing Engineering Research Center of Advanced Elastomers
- Beijing University of Chemical Technology
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172
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Qiang Z, Shebek KM, Irie M, Wang M. A Polymerizable Photoswitchable Fluorophore for Super-Resolution Imaging of Polymer Self-Assembly and Dynamics. ACS Macro Lett 2018; 7:1432-1437. [PMID: 35651234 DOI: 10.1021/acsmacrolett.8b00686] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Single-molecule super-resolution microscopy has become a standard imaging tool in the life sciences for visualizing nanostructures in situ, but the application of this technique in polymer science is much less explored. A key bottleneck is the lack of fluorophores and simple covalent attachment strategies onto polymer chains. Here, we report a functional diarylethene-based photoswitchable fluorophore that can be directly incorporated into polymer backbones through copolymerization, which significantly streamlines the labeling strategy, with no further postcoupling reactions or purifications needed. The attachment of fluorophores onto selectively labeled polymers enables super-resolution imaging of a series of model polymer blend systems with different nanostructures and chemical compositions. As each individual fluorophore is able to switch several times on average between its bright and dark state, multiple time-lapse images can be acquired to observe the dynamic nanostructural evolution of polymer blends upon solvent vapor annealing. With this demonstration of a universal, simplified labeling strategy and the ability to image polymer assembly under native conditions, this reported fluorophore may promote the widespread use of super-resolution microscopy in the polymer community.
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Affiliation(s)
- Zhe Qiang
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Kevin M. Shebek
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Masahiro Irie
- Department of Chemistry and Research Center for Smart Molecules, Rikkyo University, Nishi-Ikebukuro 3-34-1, Toshimaku, Tokyo 171-8501, Japan
| | - Muzhou Wang
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
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173
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Deng S. Multiscale Simulation of Branched Nanofillers on Young's Modulus of Polymer Nanocomposites. Polymers (Basel) 2018; 10:E1368. [PMID: 30961292 PMCID: PMC6401818 DOI: 10.3390/polym10121368] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 12/05/2018] [Accepted: 12/07/2018] [Indexed: 11/16/2022] Open
Abstract
Nanoscale tailoring the filler morphology in experiment offers new opportunities to modulate the mechanical properties of polymer nanocomposites. Based on the conventical rod and experimentally available tetrapod filler, I compare the nanofiller dispersion and elastic moduli of these two kinds of nanocomposites via molecular dynamics simulation and a lattice spring model. The results show that the tetrapod has better dispersion than the rod, which is facilitate forming the percolation network and thus benefitting the mechanical reinforcement. The elastic modulus of tetrapod filled nanocomposites is much higher than those filled with rod, and the modulus disparity strongly depends on the aspect ratio of fillers and particle-polymer interaction, which agrees well with experimental results. From the stress distribution analysis on single particles, it is concluded that the mechanical disparity between bare rod and tetrapod filled composites is due to the effective stress transfer in the polymer/tetrapod composites.
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Affiliation(s)
- Shengwei Deng
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China.
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174
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Xia W, Qin X, Zhang Y, Sinko R, Keten S. Achieving Enhanced Interfacial Adhesion and Dispersion in Cellulose Nanocomposites via Amorphous Interfaces. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b02243] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Wenjie Xia
- Department of Civil & Environmental Engineering, North Dakota State University, NDSU Dept. 2470, PO Box 6050, Fargo, North Dakota 58108, United States
| | | | | | - Robert Sinko
- Department of Mechanical Engineering, Northern Illinois University, 590 Garden Rd., Dekalb, Illinois 60115, United States
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175
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Spinnrock A, Schupp D, Cölfen H. Nanoparticle Gradient Materials by Centrifugation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1803518. [PMID: 30398701 DOI: 10.1002/smll.201803518] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 10/12/2018] [Indexed: 06/08/2023]
Abstract
Nanoparticle gradient materials are a unique class of functional materials. They combine the specific properties of nanoparticles with macroscopic materials. A continuous spatial gradient of the nanoparticle concentration leads to diverse physical property profiles. Therefore, these materials have a remarkable potential for applications in optics, electronics, and sensors. A novel approach for the defined and controlled synthesis of this material class is the fabrication in ultracentrifugal fields. The formation of a nanoparticle gradient by sedimentation in a gelatin solution is monitored online with optical systems inside an analytical ultracentrifuge. As soon as the desired nanoparticle concentration gradient is generated, the material is solidified by gelation and the desired gradient is fixed in the material. Application of the established theory of analytical ultracentrifugation allows simulations of the sedimentation process of the nanoparticles in advance. Thus, desired nanoparticle gradient materials can also be tailor-made and fabricated on a preparative scale. This is demonstrated for the example of spherical gold nanoparticles of different sizes, gold nanorods, mixtures thereof, and spherical superparamagnetic iron oxide nanoparticles.
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Affiliation(s)
- Andreas Spinnrock
- Physical Chemistry, University of Konstanz, Universitätsstrasse 10, Box 714, 78457, Konstanz, Germany
| | - David Schupp
- Physical Chemistry, University of Konstanz, Universitätsstrasse 10, Box 714, 78457, Konstanz, Germany
| | - Helmut Cölfen
- Physical Chemistry, University of Konstanz, Universitätsstrasse 10, Box 714, 78457, Konstanz, Germany
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176
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Fedosse Zornio C, Livi S, Jestin J, Duchet J, Gérard JF. Ionic PMMA/nanosilica interfaces from grafting ionic liquids under supercritical CO2 conditions. Eur Polym J 2018. [DOI: 10.1016/j.eurpolymj.2018.08.050] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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177
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Munaò G, Pizzirusso A, Kalogirou A, De Nicola A, Kawakatsu T, Müller-Plathe F, Milano G. Molecular structure and multi-body potential of mean force in silica-polystyrene nanocomposites. NANOSCALE 2018; 10:21656-21670. [PMID: 30256374 DOI: 10.1039/c8nr05135f] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
We perform a systematic application of the hybrid particle-field molecular dynamics technique [Milano, et al., J. Chem. Phys., 2009, 130, 214106] to study interfacial properties and potential of mean force (PMF) for separating nanoparticles (NPs) in a melt. Specifically, we consider Silica NPs bare or grafted with Polystyrene chains, aiming to shed light on the interactions among free and grafted chains affecting the dispersion of NPs in the nanocomposite. The proposed hybrid models show good performances in catching the local structure of the chains, and in particular their density profiles, documenting the existence of the "wet-brush-to-dry-brush" transition. By using these models, the PMF between pairs of ungrafted and grafted NPs in Polystyrene matrix are calculated. Moreover, we estimate the three-particle contribution to the total PMF and its role in regulating the phase separation on the nanometer scale. In particular, the multi-particle contribution to the PMF is able to give an explanation of the complex experimental morphologies observed at low grafting densities. More in general, we propose this approach and the models utilized here for a molecular understanding of specific systems and the impact of the chemical nature of the systems on the composite final properties.
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Affiliation(s)
- Gianmarco Munaò
- Dipartimento di Chimica e Biologia, Università di Salerno, Via Giovanni Paolo II, 132, I-84084, Fisciano, SA, Italy.
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178
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Hajibeygi M, Shafiei-Navid S, Shabanian M. Influence of imide functionalized organo-modified Mg-Al layered double hydroxide on the thermal and mechanical properties of new aliphatic-aromatic poly (amide-imide). Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4706] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mohsen Hajibeygi
- Faculty of Chemistry; Kharazmi University; 15719-14911 Tehran Iran
| | | | - Meisam Shabanian
- Faculty of Chemistry and Petrochemical Engineering; Standard Research Institute (SRI); P.O. Box 31745-139 Karaj Iran
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179
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Emamy H, Kumar SK, Starr FW. Diminishing Interfacial Effects with Decreasing Nanoparticle Size in Polymer-Nanoparticle Composites. PHYSICAL REVIEW LETTERS 2018; 121:207801. [PMID: 30500219 DOI: 10.1103/physrevlett.121.207801] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 09/04/2018] [Indexed: 05/26/2023]
Abstract
Using molecular simulations on model polymer nanocomposites at fixed filler loading, we show that interfacial polymer dynamics are affected less with decreasing nanoparticle (NP) size. However, the glass transition temperature T_{g} changes substantially more for an extremely small NP. The reason for this apparent contradiction is that the mean NP spacing decreases with decreasing particle size. Thus, all polymers are effectively interfacial for sufficiently small NPs, resulting in relatively large T_{g} shifts, even though the interfacial effects are smaller. For larger NPs, interfacial relaxations are substantially slower than the matrix for favorable NP-polymer interactions. The minority "bound" polymer dynamically decouples from the polymer matrix, and we only find small changes in T_{g} relative to that of the bulk polymer for large NPs. These results are used to organize a large body of relevant experimental data, and we propose an apparent universal dependence on the ratio of the face-to-face distance between the NPs and the chain radius of gyration.
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Affiliation(s)
- Hamed Emamy
- Department of Physics, Wesleyan University, Middletown, Connecticut 06459, USA
| | - Sanat K Kumar
- Department of Chemical Engineering, Columbia University, New York, New York 10027, USA
| | - Francis W Starr
- Department of Physics, Wesleyan University, Middletown, Connecticut 06459, USA
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180
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Dispersion state of carbon black in polystyrene produced with different dispersion media and its effects on composite rheological properties. Polym J 2018. [DOI: 10.1038/s41428-018-0149-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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181
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Nisar M, Sebag Bernd MDG, da Silva Filho LCP, Geshev J, de Souza Basso NR, Barrera Galland G. Polypropylene nanocomposites with electrical and magnetic properties. J Appl Polym Sci 2018. [DOI: 10.1002/app.46820] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Muhammad Nisar
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Avenue Bento Gonçalves 9500; 91501-970 Porto Alegre Rio Grande do Sul Brazil
| | - Maria da Graça Sebag Bernd
- Laboratório de Ensaios e Modelos Estruturais, Escola de Engenharia Civil; Universidade Federal do Rio Grande do Sul, Avenue Bento Gonçalves 9500; 91501-970 Porto Alegre Rio Grande do Sul Brazil
| | - Luiz C. P. da Silva Filho
- Laboratório de Ensaios e Modelos Estruturais, Escola de Engenharia Civil; Universidade Federal do Rio Grande do Sul, Avenue Bento Gonçalves 9500; 91501-970 Porto Alegre Rio Grande do Sul Brazil
| | - Julian Geshev
- Instituto de Física, Universidade Federal do Rio Grande do Sul, Avenue Bento Gonçalves 9500; 91501-970 Porto Alegre Rio Grande do Sul Brazil
| | - Nara R. de Souza Basso
- Faculdade de Química; Pontifícia Universidade Católica do Rio Grande do Sul, Avenue Ipiranga 6681; 90619-900 Porto Alegre Rio Grande do Sul Brazil
| | - Griselda Barrera Galland
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Avenue Bento Gonçalves 9500; 91501-970 Porto Alegre Rio Grande do Sul Brazil
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182
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Hu X, Wang Y, Zhang L, Xu M, Zhang J, Dong W. Photopatterned salecan composite hydrogel reinforced with α-Mo2C nanoparticles for cell adhesion. Carbohydr Polym 2018; 199:119-128. [DOI: 10.1016/j.carbpol.2018.07.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 06/19/2018] [Accepted: 07/03/2018] [Indexed: 11/25/2022]
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183
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Li G, He Y, Zhu P, Zhao T, Sun R, Lu D, Wong CP. Tailored surface chemistry of SiO2 particles with improved rheological, thermal-mechanical and adhesive properties of epoxy based composites for underfill applications. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.09.063] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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184
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Street DP, Mah AH, Patterson S, Pickel DL, Bergman JA, Stein GE, Messman JM, Kilbey SM. Interfacial interactions in PMMA/silica nanocomposites enhance the performance of parts created by Fused Filament Fabrication. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.10.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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185
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186
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Holt AP, Roland CM. Segmental and secondary dynamics of nanoparticle-grafted oligomers. SOFT MATTER 2018; 14:8604-8611. [PMID: 30318533 DOI: 10.1039/c8sm01443d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The local segmental and secondary dynamics of tetramethylene oxide oligomer grafted to silica nanoparticles (NPs) were investigated as a function of grafting density and molecular weight. Grafting slows the segmental (α) dynamics, but gives rise to faster secondary (β) motions. Interestingly, the magnitude of these effects decreases with the extent of grafting (i.e., surface coverage), as well as with oligomer molecular weight. The disparity in dynamical effects reflects the decoupling of the segmental and more local β dynamics, the former is associated with stronger dynamic correlations that extend over a greater spatial range. This results in greater sensitivity to interactions, including tethering of the chains to the NP surface.
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Affiliation(s)
- Adam P Holt
- Chemistry Division, Naval Research Laboratory, Code 6105, Washington, DC 20375-5342, USA.
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187
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Yang X, Shan Y, Wei X, Zhong S, Huang Y, Yu H, Yang J. Polyethylene/silica nanorod composites with reduced dielectric constant and enhanced mechanical strength. J Appl Polym Sci 2018. [DOI: 10.1002/app.47143] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xuping Yang
- School of Materials Science and Engineering, Southwest University of Science and Technology Mianyang 621010 China
| | - Yuxing Shan
- School of Materials Science and Engineering, Southwest University of Science and Technology Mianyang 621010 China
| | - Xiaonan Wei
- School of Materials Science and Engineering, Southwest University of Science and Technology Mianyang 621010 China
| | - Shengyuan Zhong
- School of Materials Science and Engineering, Southwest University of Science and Technology Mianyang 621010 China
| | - Yawen Huang
- State Key Laboratory Cultivation Base for Nonmetal Composite and Functional MaterialsSouthwest University of Science and Technology Mianyang 621010 China
| | - Hongtao Yu
- School of Materials Science and Engineering, Southwest University of Science and Technology Mianyang 621010 China
| | - Junxiao Yang
- State Key Laboratory Cultivation Base for Nonmetal Composite and Functional MaterialsSouthwest University of Science and Technology Mianyang 621010 China
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188
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Zhang B, Cao X, Zhou G, Zhao N. Anomalous diffusion of polystyrene from an attractive substrate based on all-atom simulation. Phys Chem Chem Phys 2018; 20:25304-25313. [PMID: 30255884 DOI: 10.1039/c8cp04177f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The diffusion of polystyrene (PS) polymer chains from a hydroxy (-OH)-terminated Si surface with different grafting densities φG is studied based on all-atom simulation. Our particular attention is paid to the impact of the attractive substrate on the diffusive and configurational properties of PS. Our simulation results uncover a very novel and unexpected modification to polymer diffusion with the increment of φG, namely, the diffusion is slowed down most significantly from a substrate with moderate grafting densities, while in lower or full grafting cases, the diffusive dynamics is even facilitated rather than retarded. The underlying mechanism is investigated in terms of energy and conformational change in detail. Surprisingly, we obtain a consistent scenario for diffusion. Under moderate grafting densities, the energy required to be overcome for diffusion is relatively large. In addition, PS chains are more likely to be in a stretched configuration subject to a slower relaxation. These facts can account for the hindered diffusion. While under lower or full grafting densities, the energy required for diffusion becomes even smaller than the ungrafted situation. Also, PS chains prefer a shrinking configuration undergoing faster relaxation. Consequently, the diffusion of PS is reasonably promoted.
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Affiliation(s)
- Bingjie Zhang
- College of Chemistry, Sichuan University, Chengdu 610064, China.
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189
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Zhang M, Li Y, Kolluru PV, Brinson LC. Determination of Mechanical Properties of Polymer Interphase Using Combined Atomic Force Microscope (AFM) Experiments and Finite Element Simulations. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01427] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
| | | | | | - L. Catherine Brinson
- Mechanical Engineering & Material Science, Duke University, Durham, North Carolina 27708, United States
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190
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Genix AC, Bocharova V, Kisliuk A, Carroll B, Zhao S, Oberdisse J, Sokolov AP. Enhancing the Mechanical Properties of Glassy Nanocomposites by Tuning Polymer Molecular Weight. ACS APPLIED MATERIALS & INTERFACES 2018; 10:33601-33610. [PMID: 30203957 DOI: 10.1021/acsami.8b13109] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The addition of nanoparticles to a polymer matrix is a well-known process to improve the mechanical properties of polymers. Many studies of mechanical reinforcement in polymer nanocomposites (PNCs) focus on rubbery matrices; however, much less effort concentrates on the factors controlling the mechanical performance of the technologically important glassy PNCs. This paper presents a study of the effect of the polymer molecular weight (MW) on the overall mechanical properties of glassy PNCs with attractive interaction by using Brillouin light scattering. We found that the mechanical moduli (bulk and shear) have a nonmonotonic dependence on MW that cannot be predicted by simple rule of mixtures. The moduli increase with increasing MW up to 100 kg/mol followed by a drop at higher MW. We demonstrate that the change in the mechanical properties of PNCs can be associated with the properties of the interfacial polymer layer. The latter depend on the interfacial chain packing and stretching, as well as polymer bridging, which vary differently with the MW of the polymer. These competing contributions lead to the observed nonmonotonic variations of the glassy PNC moduli with MW. Our work provides a simple, cost-effective, and efficient way to control the mechanical properties of glassy PNCs by tuning the polymer chain length. Our finding can be beneficial for the rational design of PNCs with desired mechanical performance.
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Affiliation(s)
- Anne-Caroline Genix
- Chemical Sciences Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS , F-34095 Montpellier , France
| | - Vera Bocharova
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS , F-34095 Montpellier , France
| | - Alexander Kisliuk
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS , F-34095 Montpellier , France
| | - Bobby Carroll
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS , F-34095 Montpellier , France
| | - Sheng Zhao
- Department of Chemistry , University of Tennessee , Knoxville , Tennessee 37996 , United States
| | - Julian Oberdisse
- Chemical Sciences Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
| | - Alexei P Sokolov
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS , F-34095 Montpellier , France
- Department of Chemistry , University of Tennessee , Knoxville , Tennessee 37996 , United States
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191
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Karatrantos A, Koutsawa Y, Dubois P, Clarke N, Kröger M. Miscibility and Nanoparticle Diffusion in Ionic Nanocomposites. Polymers (Basel) 2018; 10:E1010. [PMID: 30960935 PMCID: PMC6403637 DOI: 10.3390/polym10091010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 08/31/2018] [Accepted: 09/05/2018] [Indexed: 12/21/2022] Open
Abstract
We investigate the effect of various spherical nanoparticles in a polymer matrix on dispersion, chain dimensions and entanglements for ionic nanocomposites at dilute and high nanoparticle loading by means of molecular dynamics simulations. The nanoparticle dispersion can be achieved in oligomer matrices due to the presence of electrostatic interactions. We show that the overall configuration of ionic oligomer chains, as characterized by their radii of gyration, can be perturbed at dilute nanoparticle loading by the presence of charged nanoparticles. In addition, the nanoparticle's diffusivity is reduced due to the electrostatic interactions, in comparison to conventional nanocomposites where the electrostatic interaction is absent. The charged nanoparticles are found to move by a hopping mechanism.
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Affiliation(s)
- Argyrios Karatrantos
- Materials Research and Technology, Luxembourg Institute of Science and Technology, 5, Avenue des Hauts-Fourneaux, L-4362 Esch-sur-Alzette, Luxembourg.
| | - Yao Koutsawa
- Materials Research and Technology, Luxembourg Institute of Science and Technology, 5, Avenue des Hauts-Fourneaux, L-4362 Esch-sur-Alzette, Luxembourg.
| | - Philippe Dubois
- Center of Innovation and Research in Materials and Polymers (CIRMAP), Laboratory of Polymeric and Composite Materials, University of Mons & Materia Nova Research Centre, Place du Parc 20, B-7000 Mons, Belgium.
| | - Nigel Clarke
- Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, UK.
| | - Martin Kröger
- Polymer Physics, Department of Materials, ETH Zurich, Leopold-Ruzicka-Weg 4, CH-8093 Zurich, Switzerland.
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192
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Hansoge NK, Huang T, Sinko R, Xia W, Chen W, Keten S. Materials by Design for Stiff and Tough Hairy Nanoparticle Assemblies. ACS NANO 2018; 12:7946-7958. [PMID: 29975847 DOI: 10.1021/acsnano.8b02454] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Matrix-free polymer-grafted nanocrystals, called assembled hairy nanoparticles (aHNPs), can significantly enhance the thermomechanical performance of nanocomposites by overcoming nanoparticle dispersion challenges and achieving stronger interfacial interactions through grafted polymer chains. However, effective strategies to improve both the mechanical stiffness and toughness of aHNPs are lacking given the general conflicting nature of these two properties and the large number of molecular parameters involved in the design of aHNPs. Here, we propose a computational framework that combines multiresponse Gaussian process metamodeling and coarse-grained molecular dynamics simulations to establish design strategies for achieving optimal mechanical properties of aHNPs within a parametric space. Taking poly(methyl methacrylate) grafted to high-aspect-ratio cellulose nanocrystals as a model nanocomposite, our multiobjective design optimization framework reveals that the polymer chain length and grafting density are the main influencing factors governing the mechanical properties of aHNPs, in comparison to the nanoparticle size and the polymer-nanoparticle interfacial interactions. In particular, the Pareto frontier, that marks the upper bound of mechanical properties within the design parameter space, can be achieved when the weight percentage of nanoparticles is above around 60% and the grafted chains exceed the critical length scale governing transition into the semidilute brush regime. We show that theoretical scaling relationships derived from the Daoud-Cotton model capture the dependence of the critical length scale on graft density and nanoparticle size. Our established modeling framework provides valuable insights into the mechanical behavior of these hairy nanoparticle assemblies at the molecular level and allows us to establish guidelines for nanocomposite design.
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Affiliation(s)
- Nitin K Hansoge
- Department of Mechanical Engineering , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208-3109 , United States
| | - Tianyu Huang
- Department of Mechanical Engineering , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208-3109 , United States
| | - Robert Sinko
- Department of Mechanical Engineering , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208-3109 , United States
- Department of Mechanical Engineering , Northern Illinois University , 590 Garden Road , DeKalb , Illinois 60115 , United States
| | - Wenjie Xia
- Department of Civil and Environmental Engineering , North Dakota State University , 1410 14th Avenue N , Fargo , North Dakota 58105 , United States
- Center for Hierarchical Materials Design , Northwestern University , 2205 Tech Drive , Evanston , Illinois 60208-3109 , United States
| | - Wei Chen
- Department of Mechanical Engineering , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208-3109 , United States
- Center for Hierarchical Materials Design , Northwestern University , 2205 Tech Drive , Evanston , Illinois 60208-3109 , United States
| | - Sinan Keten
- Department of Mechanical Engineering , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208-3109 , United States
- Center for Hierarchical Materials Design , Northwestern University , 2205 Tech Drive , Evanston , Illinois 60208-3109 , United States
- Department of Civil and Environmental Engineering , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208-3109 , United States
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193
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Ibrahim M, Begam N, Padmanabhan V, Basu JK. Correlation between grafted nanoparticle-matrix polymer interface wettability and slip in polymer nanocomposites. SOFT MATTER 2018; 14:6076-6082. [PMID: 29989129 DOI: 10.1039/c8sm01072b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Controlling and understanding the flow properties of polymer nanocomposites (PNC) is very important in realising their potential for various applications. In this study we report molecular dynamics simulation studies of slip between a rotating polymer-grafted nanoparticle and the surrounding free linear matrix chains. By varying the interface wettability between the nanoparticle and matrix chains defined by the parameter f, the ratio of the graft to the matrix chain length, or the graft chain density, Σ, we were able to tune the interface slip, δ, significantly. Both f and Σ alter the interface wettability by changing the matrix chain penetration depth, λ, into the graft chain layer. We observed a large value of δ at smaller f or Σ which reduces with an increasing value of the respective parameters. Since interface slip is also likely to affect other properies of PNCs, like viscosity and the glass transition, we suggest that these parameters could become useful tools to control the flow and mechanical properties of PNCs made with grafted nanoparticles.
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Affiliation(s)
- Mohd Ibrahim
- Department of Physics, Indian Institute of Science, Bangalore, 560 012, India.
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194
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Sorichetti V, Hugouvieux V, Kob W. Structure and Dynamics of a Polymer–Nanoparticle Composite: Effect of Nanoparticle Size and Volume Fraction. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00840] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Valerio Sorichetti
- Laboratoire Charles Coulomb (L2C), CNRS, Univ Montpellier, Montpellier, France
- SPO, Univ Montpellier, INRA, Montpellier SupAgro, Montpellier, France
| | | | - Walter Kob
- Laboratoire Charles Coulomb (L2C), CNRS, Univ Montpellier, Montpellier, France
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195
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Klonos P, Bolbukh Y, Koutsiara C, Zafeiris K, Kalogeri O, Sternik D, Deryło–Marczewska A, Tertykh V, Pissis P. Morphology and molecular dynamics investigation of low molecular weight PDMS adsorbed onto Stöber, fumed, and sol-gel silica nanoparticles. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.06.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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196
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Genix AC, Oberdisse J. Nanoparticle self-assembly: from interactions in suspension to polymer nanocomposites. SOFT MATTER 2018; 14:5161-5179. [PMID: 29893402 DOI: 10.1039/c8sm00430g] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Recent experimental results using in particular small-angle scattering to characterize the self-assembly of mainly hard spherical nanoparticles into higher ordered structures ranging from fractal aggregates to ordered assemblies are reviewed. The crucial control of interparticle interactions is discussed, from chemical surface-modification, or the action of additives like depletion agents, to the generation of directional patches and the use of external fields. It is shown how the properties of interparticle interactions have been used to allow inducing and possibly controlling aggregation, opening the road to the generation of colloidal molecules or potentially metamaterials. In the last part, studies of the microstructure of polymer nanocomposites as an application of volume-spanning and stress-carrying aggregates are discussed.
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Affiliation(s)
- Anne-Caroline Genix
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, F-34095 Montpellier, France.
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197
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Liu X, Dong X, Liu W, Han CC, Wang D. Morphology evolution and dynamic relaxation behavior of solution-polymerized styrene-butadiene rubber/polyisoprene/silica ternary composites influenced by shear. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.05.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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198
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Javadi S, Panahi-Sarmad M, Razzaghi-Kashani M. Interfacial and dielectric behavior of polymer nano-composites: Effects of chain stiffness and cohesive energy density. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.04.061] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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199
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Zhang J, Zhou LJ, Zhang HM, Zhao ZX, Dong SL, Wei S, Zhao J, Wang ZL, Guo B, Hu PA. Highly sensitive flexible three-axis tactile sensors based on the interface contact resistance of microstructured graphene. NANOSCALE 2018; 10:7387-7395. [PMID: 29595851 DOI: 10.1039/c7nr09149d] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The lack of high-performance tactile sensors, especially for pressure/force, is a huge obstacle for the widespread application of intelligent robots. Current pressure sensors are often operated in the high range of pressure and normal direction, showing a little ability in the low range of pressure and three-axis direction simultaneously. Herein, a highly sensitive flexible tactile sensor with three-axis force sensing capacity is presented by combining microstructured polydimethylsiloxane (PDMS) arrays and a reduced graphene oxide (rGO) film. The deformation of microstructured rGO/PDMS results in a change in the contact area between the rGO film and electrode, leading to a high sensitivity of -1.71 kPa-1 in the low range pressure of 0-225 Pa with a fast response time of 6 ms at a large feature size of 100 μm. To realize three-axis sensing, a sensing unit was built up, which was composed of the adjacent four parts of patterns and electrodes underneath a bump. A mechanical model of the exerted spatial force was established to calculate each axis force component via the deformation of the rGO/PDMS pattern. The experimental results show that the current difference between the adjacent two parts has a strong relationship with the applied force. As a proof of concept, we have demonstrated a 3 × 3 array sensor for arbitrary force sensing. Our tactile sensor would be used in transmitting information from a gentle spatial force and would exhibit broad applications as e-skin in integrated robots.
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Affiliation(s)
- J Zhang
- Key Laboratory of Microsystems and Microstructure Manufacturing, Ministry of Education, Harbin Institute of Technology, No. 2 Yikuang Street, Harbin, 150080, China.
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200
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Foster EJ, Moon RJ, Agarwal UP, Bortner MJ, Bras J, Camarero-Espinosa S, Chan KJ, Clift MJD, Cranston ED, Eichhorn SJ, Fox DM, Hamad WY, Heux L, Jean B, Korey M, Nieh W, Ong KJ, Reid MS, Renneckar S, Roberts R, Shatkin JA, Simonsen J, Stinson-Bagby K, Wanasekara N, Youngblood J. Current characterization methods for cellulose nanomaterials. Chem Soc Rev 2018; 47:2609-2679. [PMID: 29658545 DOI: 10.1039/c6cs00895j] [Citation(s) in RCA: 372] [Impact Index Per Article: 62.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A new family of materials comprised of cellulose, cellulose nanomaterials (CNMs), having properties and functionalities distinct from molecular cellulose and wood pulp, is being developed for applications that were once thought impossible for cellulosic materials. Commercialization, paralleled by research in this field, is fueled by the unique combination of characteristics, such as high on-axis stiffness, sustainability, scalability, and mechanical reinforcement of a wide variety of materials, leading to their utility across a broad spectrum of high-performance material applications. However, with this exponential growth in interest/activity, the development of measurement protocols necessary for consistent, reliable and accurate materials characterization has been outpaced. These protocols, developed in the broader research community, are critical for the advancement in understanding, process optimization, and utilization of CNMs in materials development. This review establishes detailed best practices, methods and techniques for characterizing CNM particle morphology, surface chemistry, surface charge, purity, crystallinity, rheological properties, mechanical properties, and toxicity for two distinct forms of CNMs: cellulose nanocrystals and cellulose nanofibrils.
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Affiliation(s)
- E Johan Foster
- Department of Materials Science and Engineering, Virginia Tech, 445 Old Turner St, 203 Holden Hall, Blacksburg, 24061, VA, USA.
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