Electrically Induced Microstructures in Micro- and Nano-Suspensions and Related Physical Properties

Tanaka, Katsufumi; Akiyama, R.

doi:10.1295/polymj.pj2009106r

Cited by 13 publications

(9 citation statements)

References 98 publications

(150 reference statements)

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“…10. [260][261][262][263] Bishop and his coworkers, for example, considered conducting NPs in an insulating liquid in a DC field. The contact electrification of a single NP leads it to execute oscillatory motion between the two plates.…”

Section: B Effect Of Magnetic/electric Fieldsmentioning

confidence: 99%

Perspective: Outstanding theoretical questions in polymer-nanoparticle hybrids

Kumar

Ganesan

Riggleman

2017

The Journal of Chemical Physics

168

143

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This topical review discusses the theoretical progress made in the field of polymer nanocomposites, i.e., hybrid materials created by mixing (typically inorganic) nanoparticles (NPs) with organic polymers. It primarily focuses on the outstanding issues in this field and is structured around five separate topics: (i) the synthesis of functionalized nanoparticles; (ii) their phase behavior when mixed with a homopolymer matrix and their assembly into well-defined superstructures; (iii) the role of processing on the structures realized by these hybrid materials and the role of the mobilities of the different constituents; (iv) the role of external fields (electric, magnetic) in the active assembly of the NPs; and (v) the engineering properties that result and the factors that control them. While the most is known about topic (ii), we believe that significant progress needs to be made in the other four topics before the practical promise offered by these materials can be realized. This review delineates the most pressing issues on these topics and poses specific questions that we believe need to be addressed in the immediate future. Published by AIP Publishing. [http://dx

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Section: B Effect Of Magnetic/electric Fieldsmentioning

confidence: 99%

Perspective: Outstanding theoretical questions in polymer-nanoparticle hybrids

Kumar

Ganesan

Riggleman

2017

The Journal of Chemical Physics

168

143

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“…These studies showed that the attraction force in ER fluids increases with the applied electric field according to a quadratic law ∝ 0 2 . [3][4][5] However, lower exponents (1≤n<2) in the dependence of Felec on E0 were observed experimentally at a high applied electric field. 6,7 This deviation from the quadratic law was interpreted theoretically by considering, in addition to the solid particle conductivity, the dependence of the matrix conductivity on the electric field which gives rise to a saturation of the local electric field.…”

Section: Introductionmentioning

confidence: 96%

“…These studies showed that the attraction force in ER uids increases with the applied electric eld according to a quadratic law F elec f E 0 2 . [3][4][5] However, lower exponents (1 # n <…”

Section: Introductionmentioning

confidence: 99%

Electro-active elastomer composites based on doped titanium dioxide

2015

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“…Especially for micro-(or nano-) flow devices, stable flow within the gap significantly narrower than several hundred micrometers should also be required [21]. Therefore, particular attention has been directed toward the ER nano-suspension based on nano-particles [22,23].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous observations of microgap flow behavior and microstructure of electro-rheological nano-suspensions based on titanium dioxide nano-particles

et al. 2015

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Electro-rheological (ER) nano-suspensions based on titanium dioxide nano-particles with particle diameter around 400 nm and a chemically modified silicone oil with a viscosity of 0.04 Pa·s were prepared. Microgap flow behavior in the absence of an external electric field and the ER responses were investigated in relation to the microstructure observed in the quiescent state. The effects of the continuous phase of suspending oil and particle volume fraction were reported for the nano-suspensions. For the modified silicone oil-based nano-suspensions of 8.8 and 12 vol %, no plateau stresses were observed, whereas a plateau stress around 5 Pa was found only for the nano-suspension of 20 vol %. On the other hand, the ER effect of the modified silicone oil-based nano-suspension of 20 vol % was comparable to that of the silicone oil-based nano-suspension of 12 vol %. Simultaneous optical observations with the ER effect were also performed for the nano-suspension of 20 vol %. The effects of shear rate and time on the shear stress and flow behavior in the presence (or absence) of the dc electric field were reported, showing unexpected reduction of the ER effect and the shear thinninglike behavior with flow instability at higher shear rates. Possible factors for improving the ER effect were discussed in the present paper.

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Electrically Induced Microstructures in Micro- and Nano-Suspensions and Related Physical Properties

Cited by 13 publications

References 98 publications

Perspective: Outstanding theoretical questions in polymer-nanoparticle hybrids

Perspective: Outstanding theoretical questions in polymer-nanoparticle hybrids

Electro-active elastomer composites based on doped titanium dioxide

Simultaneous observations of microgap flow behavior and microstructure of electro-rheological nano-suspensions based on titanium dioxide nano-particles

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