Nanostructured Electrostrictive Systems: Electric Actuation of Nanostructured Thermoplastic Elastomer Gels with Ultralarge Electrostriction Coefficients (Adv. Funct. Mater. 17/2011)

Kim, Bori; Park, Youn Duk; Min, Kyoungho; Lee, Jun Young; Hwang, Seung Sang; Hong, Soon Man; Kim, Bong Hoon; Kim, Sang Ouk; Koo, Chong Min

doi:10.1002/adfm.201190068

Cited by 2 publications

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“…It is composed of two polystyrene (PS) blocks and one poly(ethylene‐ co ‐butylene) (PEB) elastomer midblock. It features in addition to its ordered nanostructure as a block copolymer, excellent combination of mechanical properties , good resistance to water treeing , good electromechanical coupling and high compatibility with polyolefins and other polymers .…”

Section: Introductionmentioning

confidence: 99%

Tuning the mechanical and dielectric properties of clay‐containing thermoplastic elastomer nanocomposites

Helal

Amurin

Carastan

et al. 2018

Polymer Engineering & Sci

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In this study, the mechanical strength and the AC short term breakdown strength of polystyrene‐b‐poly(ethylene‐co‐butylene)‐b‐polystyrene (SEBS) thermoplastic elastomer clay‐containing nanocomposites have been investigated as function of their morphologies. The SEBS/clay nanocomposites with tailored morphologies were prepared previously by different processing techniques. They featured different orientations of clay platelets as well as polystyrene (PS) block nanodomains, namely: isotropic, oriented, and partially oriented morphologies. In unfilled SEBS matrices, the mechanical strength was mainly tuned by the orientation of PS block nanodomains. A good correlation between the dielectric breakdown strength and the mechanical stiffness was observed overall: the higher the mechanical strength was, the higher the breakdown strength was. In the nanocomposites, the orientation of clay platelets as well as the degree of order and the characteristic sizes of the block copolymer domains were seen to affect strongly the breakdown strength behavior in addition to the mechanical strength. In particular, the partially oriented morphology achieved by film blowing extrusion exhibited the maximum increase of the breakdown strength by 25% with optimized mechanical stiffness evaluated between that of the oriented morphology as a lower limit and that of the isotropic morphology as an upper limit. POLYM. ENG. SCI., 58:E174–E181, 2018. © 2018 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Tuning the mechanical and dielectric properties of clay‐containing thermoplastic elastomer nanocomposites

Helal

Amurin

Carastan

et al. 2018

Polymer Engineering & Sci

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“…23-24 Semiconductor quantum dots (QDs) such as CdS, 25 CdSe, 26 CdTe 27 and PbS 28 have been grafted onto TiO 2 as sensitizers to enhance photocurrent response, with the QD bandgap tailored by modifying its physical size. 27,29 Of these binary semiconductors, CdS has attracted considerable attention for photocatalytic applications, including the synthesis and application of CdS/titanate nanotubes, 30 ZnO/CdS heterostructures, 31 CdS/TaON/graphene composites, 32 and CdS/Bi 2 WO 6 heterostructures. 29 4 Ternary sulfide ZnIn 2 S 4 , as the only member of the AB 2 X 4 family semiconductor with a layered structure, has attracted considerable attention due to its potential application in a variety of fields including catalysis, 33, 34 charge storage, 35 In an effort to achieve a high performance chemically stable visible light photocatalyst we fabricate CdS/ZnIn 2 S 4 /TiO 2 heterostructures by a facile hydrothermal method coupled with a successive ionic layer adsorption and reaction process (SILAR).…”

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CdS/ZnIn₂S₄/TiO₂ 3D-heterostructures and their photoelectrochemical properties

et al. 2016

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We describe the synthesis and application of a three-dimensionally (3D) structured CdS quantum dot / ZnIn 2 S 4 nanosheet / TiO 2 nanotube array (CdS/ZnIn 2 S 4 /TiO 2 ) heterostructured material architecture. TiO 2 nanotube arrays (TiO 2 NTAs) are used as the synthetic template, subsequently sensitized using hydrothermal and successive ion layer adsorption and reaction (SILAR) techniques. The described synthesis approach offers a powerful technique for designing 3D heterostructure systems.Under AM1.5G illumination, the 3D CdS/ZnIn 2 S 4 /TiO 2 samples generate a photocurrent of approximately 4.3mA/cm 2 , with a photoconversion efficiency of 2%. Samples are tested for their ability to photocatalytically degrade target agents; noteworthy is that after 90 min illumination 100% of 2, 4-dichlorophenoxyacetic acid (2, 4-D) is removed. Charge carriers are produced when photons are irradiated onto the photocatalyst in the suspended solution. The bandgap of TiO 2 (3.2 eV), ZnIn 2 S 4 (2.6 eV) and CdS (2.4 eV) reduces progressively with the CB and VB increasing progressively to form a stepwise heterostructure that can absorb visible right. Under irradiation, photo-generated electrons are excited from the valence band (VB) to the conduction band (CB) of CdS, creating positive holes in the VB of CdS.Photo-excited electrons in the CB of CdS transfer to ZnIn 2 S 4 , and then migrating to TiO 2 .Meanwhile, holes are transported in the opposite direction at the heterojunction interface. The separated electrons and holes migrate to the surface as reducing agents and sacrificial reagents, respectively (eq (3), eq (4)). Oxygen molecules dissolved in the suspension capture the electrons in the conduction band, and the holes in the valence band are captured by H 2 O species adsorbed on the surface of the catalysts to produce the •OH radicals(eq (5), eq (6) and eq (7)), which subsequently degrades organic pollutants (eq (9)). 67, 68 Meanwhile, CB electrons may recombine with VB holes (eq (8)). 20 is recorded after irradiation 20 min, and the results are shown in Fig. 11B. From TiO 2 (curve c) to CdS/ZnIn 2 S 4 /TiO 2 (curve a), the PL intensity shows a gradual increase. The results confirm the best photocatalytic performance of CdS/ZnIn 2 S 4 /TiO 2 . ConclusionsA novel CdS/ZnIn 2 S 4 /TiO 2 heterostructure is prepared by a mild hydrothermal method combined with a SILAR technique. The photoelectrical performances of the as prepared materials are carefully investigated; optimal samples demonstrate a solar spectrum photoconversion efficiency of approximately 2.0%. Photocatalytic performance was tested by photodegradation of organic pollutants, with excellent efficiencies obtained; a photodegradation mechanism was proposed on the basis of band alignment to elucidate the enhancement of efficiency seen in the CdS/ZnIn 2 S 4 /TiO 2 material system. Fig.11. PL spectra measured during illumination with CdS/ZnIn 2 S 4/ TiO 2 (A) and different photoelectrodes (B): (a)

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Nanostructured Electrostrictive Systems: Electric Actuation of Nanostructured Thermoplastic Elastomer Gels with Ultralarge Electrostriction Coefficients (Adv. Funct. Mater. 17/2011)

Cited by 2 publications

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Tuning the mechanical and dielectric properties of clay‐containing thermoplastic elastomer nanocomposites

Tuning the mechanical and dielectric properties of clay‐containing thermoplastic elastomer nanocomposites

CdS/ZnIn₂S₄/TiO₂ 3D-heterostructures and their photoelectrochemical properties

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Nanostructured Electrostrictive Systems: Electric Actuation of Nanostructured Thermoplastic Elastomer Gels with Ultralarge Electrostriction Coefficients (Adv. Funct. Mater. 17/2011)

Cited by 2 publications

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Tuning the mechanical and dielectric properties of clay‐containing thermoplastic elastomer nanocomposites

Tuning the mechanical and dielectric properties of clay‐containing thermoplastic elastomer nanocomposites

CdS/ZnIn2S4/TiO2 3D-heterostructures and their photoelectrochemical properties

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CdS/ZnIn₂S₄/TiO₂ 3D-heterostructures and their photoelectrochemical properties