Diminishing Interfacial Effects with Decreasing Nanoparticle Size in Polymer-Nanoparticle Composites

Emamy, Hamed; Kumar, Sanat K.; Starr, Francis W.

doi:10.1103/physrevlett.121.207801

Cited by 62 publications

(53 citation statements)

References 33 publications

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“…According to previous simulation studies, polymer chains exhibit gradually prolonged relaxation times ( τ ) with decreasing distance from attractively interacting nanoparticle (as sketched in Fig. c) . Simulations also suggest that polymer chains can be spatially confined and chain R g is reduced as interparticle distance decreases as studied in fairly similar dimethacrylate polymer network (bisphenol A glycidyl dimethacrylate/triethylene glycol dimethacrylate blends) .…”

Section: Resultssupporting

confidence: 66%

Translation of segment scale stiffening into macroscale reinforcement in polymer nanocomposites

Zbončák

Ondreáš

Uhlíř

et al. 2019

Polymer Engineering & Sci

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Structuring of polymer nanocomposites (PNCs) with an aid of relatively weak external magnetic fields has been studied as a method for control of the nano‐ and microstructure. Magnetic nanoparticles (NPs) were assembled into high aspect ratio one‐dimensional strings and unidirectionally oriented with the magnetic field (B = 0–50 mT) within the photopolymer matrix. The effect of the anisotropic MNPs assemblies on the mechanical properties was studied over a wide temperature range for the first time. The impact of various reinforcing mechanisms was distinguished with respect to the position of the glass transition temperature (Tg). The reinforcing effect exhibits temperature dependency with a maximum ~65°C above the glass transition and only negligible effect below the Tg. In addition, significant directional anisotropy of stiffness was observed. Composite micromechanics was applied to interpret the orientation and size‐dependent reinforcement of PNCs, and temperature‐dependent stiffness of the polymer‐MNP structures was quantified. The presence of polymer chains with altered dynamics surrounding the MNPs inside the anisotropic assemblies was proposed to be an essential nanoscale mechanism mediating the stress transfer and contributing to mechanical robustness of the hybrid structures and PNCs. POLYM. ENG. SCI., 60:587–596, 2020. © 2019 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 66%

Translation of segment scale stiffening into macroscale reinforcement in polymer nanocomposites

Zbončák

Ondreáš

Uhlíř

et al. 2019

Polymer Engineering & Sci

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“…Our results do not exhibit a clear trend of σ dc change due to the particle size effect, yet it is reported that decreasing nanoparticle size diminishes interfacial effects in polymer-nanoparticle composites. 41…”

Section: Coupling Between Relaxation Processesmentioning

confidence: 99%

Segmental and interfacial dynamics quantitatively determine ion transport in solid polymer composite electrolytes

Huang

Mei

Guo

2022

J of Applied Polymer Sci

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Solid polymer-ceramic composite electrolytes (PCEs) have attracted vast attention for developing solid-state batteries. However, slow ion transport at ambient temperature impedes unlocking their potential. Improving ionic conductivity of PCEs remains a major challenge, because ion transport mechanism in complicated composites is not currently available. This article, for the first time, demonstrates that segmental motion and interfacial polarization are directly coupled, both quantitatively determine ion transport in PCEs. Adding small-molecule additives enhances ionic conductivity in PCEs, by increasing concentration of ions participating in transport and by equally accelerating segmental motion and interfacial dynamics.Accordingly, an ionic conductivity achieves 1.3 Â 10 À3 S/cm at 30 C, simultaneously with high mechanical strength and toughness (solid and flexible, shear modulus G' > 1 MPa). The results may shed a light for better analysis and improved design of solid composite electrolytes, toward meeting material demands for next-generation electrochemical energy storage.

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“…Emamy et al 208 found that the interfacial polymer dynamics are less effected with decreasing in NP size. On the other hand, a substantial change in the glass transition temperature in the presence of an extremely small NP has observed, as depicted in Figure 2-17.…”

mentioning

confidence: 99%

“…Further, the dynamics of NP in polymer nanocomposites has been investigated, and it is found that weakly interacting mixtures of NPs and polymers display two very different classes of behaviour depending on their size. 209 However, most of the above investigations have focused on mechanical and/or thermal properties of the composite materials, 201,[204][205][206][207][208][209][210] and gas transport characteristics of these materials are yet to be explored. .…”

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confidence: 99%

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Interfacial structure of polymers near a surface: a molecular dynamics study

Dutta¹

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The efficient separation of gases is a subject of considerable interest due to economic and environmental threats associated with air pollution, and is an imperative to meet energy demands of the world. Membrane based gas separation is considered as an efficient, productive, readily scalable, and environmentally friendly process that can operate in a continuous fashion. The recent advances have shifted towards the development of mixed matrix membranes (MMM), due to the challenges with the current spectrum of polymeric and inorganic membranes. MMMs have been commonly prepared by incorporating inorganic fillers such as zeolites or metal organic frameworks in a continuous polymer matrix. However, the success of MMMs depends greatly on the screening and selection of suitable polymer matrix, inorganic filler and interaction between v Publications included in this thesisvi Submitted manuscripts included in this thesisNo manuscripts submitted for publication. Other publications during candidature Peer-reviewed papersRavi C. Dutta and SK. Bhatia, Transport diffusion of light gases in polyethylene using atomistic simulations, Langmuir, 33, 936 (2017) Ravi C. Dutta and SK. Bhatia, Structure and gas transport at the polymer-zeolite Interface: Insights from molecular dynamics simulations, ACS Appl. Mater. Interfaces, 10, 5992 (2018).Ravi C. Dutta and SK. Bhatia, Interfacial barriers to gas transport in zeolites: distinguishing internal and external resistances, Phys. Chem. Chem. Phys., 20, 26386 (2018) Ravi C. Dutta and SK. Bhatia, Atomistic Investigation of Mixed-Gas Separation in a Fluorinated Polyimide Membrane, ACS Appl. Polym. Mater., 16,1359 Ravi C. Dutta and SK. Bhatia, Interfacial barriers to gas transport: probing solid-gas interfaces at the atomistic level, Mol.Simul.,

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Diminishing Interfacial Effects with Decreasing Nanoparticle Size in Polymer-Nanoparticle Composites

Cited by 62 publications

References 33 publications

Translation of segment scale stiffening into macroscale reinforcement in polymer nanocomposites

Translation of segment scale stiffening into macroscale reinforcement in polymer nanocomposites

Segmental and interfacial dynamics quantitatively determine ion transport in solid polymer composite electrolytes

Interfacial structure of polymers near a surface: a molecular dynamics study

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