A study on the fundamental ceramic–polymer interactions in the high CeO2-loading polyethylene glycol blend

Yin, Xiuli; Hong, Liang; Liu, Zhaolin

doi:10.1016/j.jeurceramsoc.2004.09.018

Cited by 22 publications

(7 citation statements)

References 58 publications

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“…The crystallinity of PTFE phase decreased when filler is added. It could be ascribed to strong adsorption tendency of PTFE segments on to CeO 2 particles, that is, the crystallization of PTFE chains became impossible in the adsorption layer 33 …”

Section: Resultsmentioning

confidence: 99%

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Low Dielectric Loss PTFE/CeO₂ Ceramic Composites for Microwave Substrate Applications

Anjana

Sebastian

Suma

et al. 2008

Int J Applied Ceramic Tech

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Cerium oxide (CeO 2 ) filled polytetrafluoroethylene (PTFE) composites prepared by powder processing technique for microwave substrate application is presented in this paper. The PTFE is used as the matrix and the dispersion of CeO 2 in the composite is varied up to 0.6 by volume fraction, and the dielectric properties were studied at 1 MHz and microwave frequencies. The relative permittivity and dielectric loss increased with increase in CeO 2 content. For 0.6 volume fraction loading of the ceramic, the composite has e r of 5 and tan d of 0.0064 at 7 GHz. Different theoretical approaches have been employed to predict the effective permittivity of composite systems and the results were compared with that of experimental data. The serial mixing model shows good correlation with the experimental results.

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Section: Resultsmentioning

confidence: 99%

“…It could be ascribed to strong adsorption tendency of PTFE segments on to CeO 2 particles, that is, the crystallization of PTFE chains became impossible in the adsorption layer. 33 The surface morphology and filler distribution in the PTFE composites are studied using SEM and the results are shown in Fig. 2.…”

Section: Methodsmentioning

confidence: 99%

Low Dielectric Loss PTFE/CeO₂ Ceramic Composites for Microwave Substrate Applications

Anjana

Sebastian

Suma

et al. 2008

Int J Applied Ceramic Tech

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“…The central idea of all such models is based on a few concept including (1) Lewis acid-base interaction between polymer-ions-fillers [27,28] and (2) adsorption of polymer onto the filler surface and van der Waals force between filler particles [29]. The gist of most of the models lies in accepting the role of the fillers as a supporting matrix in the composite phase.…”

Section: Methodsmentioning

confidence: 99%

Polymer–ion–clay interaction based model for ion conduction in intercalation-type polymer nanocomposite

Sharma

Thakur

2009

Ionics

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A series of polymer nanocomposite films based on intercalation of (PAN) 8 LiCF 3 SO 3 into the nanometric clay channels of an organomodified clay has been prepared using the standard solution-casting technique. The role of organoclay concentration on polymer-ion interaction, ion-ion interaction, and ion-clay interaction in clay-based nanocomposite films has been analyzed using Fourier transform infrared (FTIR) analysis. Substantial ion dissociation is observed even at a very low clay loading (1-2 wt.%) in the nanocomposites. FTIR results suggest the presence of both uncoordinated CF 3 SO 3 − (free-anions) and ion pairs in the nanocomposite evidenced by changes in CF 3 SO 3 − symmetry from C3ν to Cs and marked asymmetry in the profile of degenerate δ d (CF 3 − ) mode. The experimental results suggest a direct correlation of clay-assisted ion dissociation process with variation in conductivity (σ dc ) and glass transition temperature (T g ) as a function of clay concentration. A model has been proposed to explain the observed correlation on the basis of polymer-ion-clay interaction. The proposed scheme of ion transport mechanism appears to be consistent with the experimental observation.

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“…The NiO (50 wt %)−YSZ mixture was fabricated by suspending a given amount of the YSZ powder in an aqueous solution containing Ni(NO 3 ) 2 (1 mol/L), ethylenediaminetetraacetic acid (1 mol/L), and poly(vinyl alcohol) [15 wt % of YSZ], and it was followed by drying and calcination. Details about the preparation of the polymer−ceramic mixture, green tube extrusion, fine ceramic powder fabrication, and ceramic sintering were reported in our previous work. ,, After precalcinating the NiO−YSZ polymer green tube at 1000 °C for 2 h, the resultant porous NiO−YSZ tube possessed sufficient mechanical strength to withstand developing a coating layer on it. A slurry was formulated by mixing 150 g of the YSZ fine powder in an organic solution comprising Butiva-79 (6.25 g) (polyvinylbutyral resin, Monsanto), Span-80 (3 mL) (sorbitan monostearate, a nonionic surfactant, Aldrich), fish oil (6 mL), dibutyl phthalate (3 mL), and toluene-methylethyketone (v/v = 1:1, 1 L).…”

Section: Experimental and Computational Methodsmentioning

confidence: 99%

Asymmetric Tubular Oxygen-Permeable Ceramic Membrane Reactor for Partial Oxidation of Methane

2007

Self Cite

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We report a successful paradigm of implementing the nickel catalyst for partial oxidation of methane (POM) in an oxygen-permeable ceramic membrane reactor (OPCMR). With using air feed, the OPCM (or the cathode of O 2 reaction) was completely gastight but presented a desirable oxygen anion flux, which is required by POM in the anodic side. An almost 100% of CH 4 conversion with high selectivity of CO and H 2 was achieved in the anode, which was initially a composite of YSZ and NiO. It is also found that a mutual diffusion of Ni 2+ and Zr 4+ ions happens between the YSZ and NiO phases, which affected performance of POM. Besides experimental work, a new activation pathway was proposed to describe cleavage of the first C-H bond of methane. This activation pathway was simulated using the density function-theory and the computed activation energy for breaking up the first C-H bond falls in the experimental measurement range.

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A study on the fundamental ceramic–polymer interactions in the high CeO2-loading polyethylene glycol blend

Cited by 22 publications

References 58 publications

Low Dielectric Loss PTFE/CeO₂ Ceramic Composites for Microwave Substrate Applications

Low Dielectric Loss PTFE/CeO₂ Ceramic Composites for Microwave Substrate Applications

Polymer–ion–clay interaction based model for ion conduction in intercalation-type polymer nanocomposite

Asymmetric Tubular Oxygen-Permeable Ceramic Membrane Reactor for Partial Oxidation of Methane

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A study on the fundamental ceramic–polymer interactions in the high CeO2-loading polyethylene glycol blend

Cited by 22 publications

References 58 publications

Low Dielectric Loss PTFE/CeO2 Ceramic Composites for Microwave Substrate Applications

Low Dielectric Loss PTFE/CeO2 Ceramic Composites for Microwave Substrate Applications

Polymer–ion–clay interaction based model for ion conduction in intercalation-type polymer nanocomposite

Asymmetric Tubular Oxygen-Permeable Ceramic Membrane Reactor for Partial Oxidation of Methane

Contact Info

Product

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Low Dielectric Loss PTFE/CeO₂ Ceramic Composites for Microwave Substrate Applications

Low Dielectric Loss PTFE/CeO₂ Ceramic Composites for Microwave Substrate Applications