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Li, Zhi Hong; Gong, Yan; Min, P. G.; Wu, Dong; Sun, Yongjun; Dong, Binghai; Wu, Zhong Hua; Zhao, Hui

doi:10.1023/a:1021722022956

Cited by 9 publications

(4 citation statements)

References 3 publications

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“…For a quasi two-phase system having sharply defined phase boundaries but with micro-fluctuations of electron density within any phase of two-phase system, the overall scattering displays a positive deviation from the Debye's theory (see Figure 2) [19], and:…”

Section: (3) Positive Deviationmentioning

confidence: 97%

“…Once parameters  and b are derived from the Debye analysis, the correction of negative deviation [20] and positive deviation [19] from the Debye's theory can be performed with Equation (8) and Equation (9), respectively.…”

Section: (4) Correction Of Deviationmentioning

confidence: 99%

“…where the forward scattering intensity I(0) and the radius of gyration R G can be derived from Equation (19), Q can be computed with Equation (4).…”

Section: ) Shape Evaluationmentioning

confidence: 99%

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A program for SAXS data processing and analysis

Li¹

2013

Chinese Phys. C

136

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Section: (3) Positive Deviationmentioning

confidence: 97%

Section: (4) Correction Of Deviationmentioning

confidence: 99%

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A program for SAXS data processing and analysis

Li¹

2013

Chinese Phys. C

136

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“…The evaluated values were 0.029−0.036 OH groups/Å 2 , which is somewhat lower than the value reported by Zhuravlev . As for another experimental approach to investigate the surface structure of colloidal silica, Li et al performed a small-angle X-ray scattering (SAXS) study about colloidal silica and estimated the average core size by considering a core-layer structure …”

Section: Introductionmentioning

confidence: 99%

Analysis of Surface Structure and Hydrogen/Deuterium Exchange of Colloidal Silica Suspension by Contrast-Variation Small-Angle Neutron Scattering

2008

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The microscopic surface structure and hydrogen/deuterium exchange effect were investigated by contrast-variation small-angle neutron scattering (CV-SANS) for three different-sized amorphous colloidal silica aqueous suspensions. The results show that the fraction of hydrogen/deuterium exchange per nanoparticle, phiH/D, strongly depends on the size of silica nanoparticles. This finding supports that the hydrogen/deuterium exchange occurs exclusively within a finite surface layer of silica nanoparticles, while the inner component remained unchanged. Detailed analyses of the scattering intensity functions led to the estimation of (1) phiH/D and (2) the thickness of the surface layer as functions of the particle radius. The surface layer thickness was found to increase from 18 to 35 A with decreasing the particle radius from 165 to 71.2 A. The surface area per unit weight of silica estimated with the CV-SANS results are comparable to those reported in the literature.

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Enhanced dielectric performance and energy storage of PVDF‐HFP‐based composites induced by surface charged Al₂O₃

Yin

Yang

et al. 2019

J Polym Sci B Polym Phys

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In order to enhance dielectric properties and energy storage density of poly(vinylidene fluoride‐hexafluoro propylene) (PVDF‐HFP), surface charged gas‐phase Al2O3 nanoparticles (GP‐Al2O3, with positive surface charges, ε’ ≈ 10) are selected as fillers to fabricate PVDF‐HFP‐based composites via simple physical blending and hot‐molding techniques. The results show that GP‐Al2O3 are dispersed homogeneously in the PVDF‐HFP matrix and the existence of nanoscale interface layer (matrix‐filler) is investigated by SAXS. The dielectric constant of the composites filled with 10 wt % GP‐Al2O3 is 100.5 at 1 Hz, which is 5.6 times higher than that of pure PVDF‐HFP. The maximum energy storage density of the composite is 4.06 J cm−3 at an electrical field of 900 kV mm−1 with GP‐Al2O3 content of 1 wt %. Experimental results show that GP‐Al2O3 could induce uniform fillers’ distribution and increase the concentration of electroactive β‐phase as well as enhance interfacial polarization in the matrix, which resulted in enhancements of dielectric constant and energy storage density of the PVDF‐HFP composites. This work demonstrates that surface charged inorganic‐oxide nanoparticles exhibit promising potential in fabricating ferroelectric polymer composites with relatively high dielectric constant and energy storage. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2019, 57, 574–583

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Cited by 9 publications

References 3 publications

A program for SAXS data processing and analysis

A program for SAXS data processing and analysis

Analysis of Surface Structure and Hydrogen/Deuterium Exchange of Colloidal Silica Suspension by Contrast-Variation Small-Angle Neutron Scattering

Enhanced dielectric performance and energy storage of PVDF‐HFP‐based composites induced by surface charged Al₂O₃

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Untitled

Cited by 9 publications

References 3 publications

A program for SAXS data processing and analysis

A program for SAXS data processing and analysis

Analysis of Surface Structure and Hydrogen/Deuterium Exchange of Colloidal Silica Suspension by Contrast-Variation Small-Angle Neutron Scattering

Enhanced dielectric performance and energy storage of PVDF‐HFP‐based composites induced by surface charged Al2O3

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Enhanced dielectric performance and energy storage of PVDF‐HFP‐based composites induced by surface charged Al₂O₃