The Experts below are selected from a list of 9078 Experts worldwide ranked by ideXlab platform
Gbs High - One of the best experts on this subject based on the ideXlab platform.
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Application of Fumed Silica in Defoaming Reagent
Guangdong Chemical Industry, 2006Co-Authors: Gbs HighAbstract:The paper has described the structure characteristic of Fumed Silica and function in defoaming reagent and it is showed that 200~380m2/g(BET method) surface area of Fumed Silica has the optimal application effect.Then,it discussed performance of application,rate and applied system.
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Progress of Fumed Silica Industry in China in 2005
Paint and Coatings Industry, 2006Co-Authors: Gbs HighAbstract:The review of Fumed Silica market and development in China in 2005 was summarized in this paper.At the same time,the existing problems and prospect of China's Fumed Silica industry was also discussed.
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Morphology and Mechanical Properties of Styrene- Butadiene-Rubber/Fumed Silica Nano-Composite Materials
Petrochemical Technology, 2005Co-Authors: Gbs HighAbstract:Effects of modified and unmodified Fumed Silica,and adhesive agent RH on morphology and mechanical properties of styrene-butadiene-rubber(SBR)/Fumed Silica nano-composite were studied.Modified Fumed Silica was treated with modifier Si69.Reinforcement effect of modified Fumed Silica to SBR were superior to that of unmodified Fumed Silica.Addition of both adhesive agent RH and modified Fumed Silica improved comprehensive mechanical properties of nano-composite.Tensile strength and tear strength increased by 64% and 33% respectively,comparing with sole addition of modified Fumed Silica.By means of SEM the dispersion of modified Fumed Silica was better that of unmodified Fumed Silica.Addition of adhesive agent RH could enhance rebound resilience of system.Compression deflection test indicated that modified Fumed Silica could decrease temperature rise and permanent set in compression.
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The Synthesis Technology and Characteristics of Fumed Silica
Guangdong Chemical Industry, 2004Co-Authors: Gbs HighAbstract:The development of Fumed Silica and its synthesis technology are reviewed in this paper. The characteristics and the standard of Fumed Silica are introduced as well.
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Production of Fumed Silica
Guangdong Chemical Industry, 2004Co-Authors: Gbs HighAbstract:Preparation theory and production technology and the technological difficult problem in process of production of Fumed Silica were introduced in the thesis.
Michael R. Kessler - One of the best experts on this subject based on the ideXlab platform.
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Thermal expansion of Fumed Silica/cyanate ester nanocomposites
Journal of Applied Polymer Science, 2008Co-Authors: W.k. Goertzen, Michael R. KesslerAbstract:The thermal expansion behavior of a cyanate ester matrix reinforced by Fumed Silica nanoparticles with average primary particle diameters of 12 and 40 nm was investigated with thermomechanical analysis. All nanocomposites showed decreased coefficients of thermal expansion (CTEs) in comparison with the neat bisphenol E cyanate ester resin, but the 12-nm Fumed Silica nanocomposites had lower CTEs than the 40-nm nanocomposites for equal volume fractions. The largest decrease in CTE was 27.0% for 20.7 vol % 40-nm Fumed Silica. When the data were compared to applicable theory, the best fit of the data was given by Schapery's upper limit and Shi's model. Estimates of the interphase volume fraction and effective thickness surrounding the nanoparticles were made with the results of Shi's model, and the results showed that the interphase volume fraction was larger for the 12-nm Fumed Silica nanocomposites, given an equal fraction of Silica. The glass-transition temperature of the nanocomposites from thermomechanical analysis varied only slightly with the volume fraction. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
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thermal expansion of Fumed Silica cyanate ester nanocomposites
Journal of Applied Polymer Science, 2008Co-Authors: W.k. Goertzen, Michael R. KesslerAbstract:The thermal expansion behavior of a cyanate ester matrix reinforced by Fumed Silica nanoparticles with average primary particle diameters of 12 and 40 nm was investigated with thermomechanical analysis. All nanocomposites showed decreased coefficients of thermal expansion (CTEs) in comparison with the neat bisphenol E cyanate ester resin, but the 12-nm Fumed Silica nanocomposites had lower CTEs than the 40-nm nanocomposites for equal volume fractions. The largest decrease in CTE was 27.0% for 20.7 vol % 40-nm Fumed Silica. When the data were compared to applicable theory, the best fit of the data was given by Schapery's upper limit and Shi's model. Estimates of the interphase volume fraction and effective thickness surrounding the nanoparticles were made with the results of Shi's model, and the results showed that the interphase volume fraction was larger for the 12-nm Fumed Silica nanocomposites, given an equal fraction of Silica. The glass-transition temperature of the nanocomposites from thermomechanical analysis varied only slightly with the volume fraction. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
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Dynamic mechanical analysis of Fumed Silica/cyanate ester nanocomposites
Composites Part A-applied Science and Manufacturing, 2008Co-Authors: W.k. Goertzen, Michael R. KesslerAbstract:Fumed Silica particles with average primary particle diameters of 12 and 40 nm were combined with a low viscosity bisphenol E cyanate ester resin to form composite materials with enhanced storage modulus and reduced damping behavior, as evidenced by dynamic mechanical analysis (DMA). The storage modulus increased with volume fraction of Fumed Silica in both the glassy and rubbery regions, but the increase was more pronounced in the rubbery region. The maximum increase in storage modulus in the glassy region was 75% for 20.7 vol% of 40 nm Fumed Silica, while the same composition showed a 231% increase in the rubbery storage modulus. Furthermore, decreases in damping behavior were used to estimate the effective polymer-particle interphase thickness. The glass transition temperature of the nanocomposites was not changed significantly with increasing volume fraction.
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dynamic mechanical analysis of Fumed Silica cyanate ester nanocomposites
Composites Part A-applied Science and Manufacturing, 2008Co-Authors: W.k. Goertzen, Michael R. KesslerAbstract:Fumed Silica particles with average primary particle diameters of 12 and 40 nm were combined with a low viscosity bisphenol E cyanate ester resin to form composite materials with enhanced storage modulus and reduced damping behavior, as evidenced by dynamic mechanical analysis (DMA). The storage modulus increased with volume fraction of Fumed Silica in both the glassy and rubbery regions, but the increase was more pronounced in the rubbery region. The maximum increase in storage modulus in the glassy region was 75% for 20.7 vol% of 40 nm Fumed Silica, while the same composition showed a 231% increase in the rubbery storage modulus. Furthermore, decreases in damping behavior were used to estimate the effective polymer-particle interphase thickness. The glass transition temperature of the nanocomposites was not changed significantly with increasing volume fraction.
W.k. Goertzen - One of the best experts on this subject based on the ideXlab platform.
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Thermal expansion of Fumed Silica/cyanate ester nanocomposites
Journal of Applied Polymer Science, 2008Co-Authors: W.k. Goertzen, Michael R. KesslerAbstract:The thermal expansion behavior of a cyanate ester matrix reinforced by Fumed Silica nanoparticles with average primary particle diameters of 12 and 40 nm was investigated with thermomechanical analysis. All nanocomposites showed decreased coefficients of thermal expansion (CTEs) in comparison with the neat bisphenol E cyanate ester resin, but the 12-nm Fumed Silica nanocomposites had lower CTEs than the 40-nm nanocomposites for equal volume fractions. The largest decrease in CTE was 27.0% for 20.7 vol % 40-nm Fumed Silica. When the data were compared to applicable theory, the best fit of the data was given by Schapery's upper limit and Shi's model. Estimates of the interphase volume fraction and effective thickness surrounding the nanoparticles were made with the results of Shi's model, and the results showed that the interphase volume fraction was larger for the 12-nm Fumed Silica nanocomposites, given an equal fraction of Silica. The glass-transition temperature of the nanocomposites from thermomechanical analysis varied only slightly with the volume fraction. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
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thermal expansion of Fumed Silica cyanate ester nanocomposites
Journal of Applied Polymer Science, 2008Co-Authors: W.k. Goertzen, Michael R. KesslerAbstract:The thermal expansion behavior of a cyanate ester matrix reinforced by Fumed Silica nanoparticles with average primary particle diameters of 12 and 40 nm was investigated with thermomechanical analysis. All nanocomposites showed decreased coefficients of thermal expansion (CTEs) in comparison with the neat bisphenol E cyanate ester resin, but the 12-nm Fumed Silica nanocomposites had lower CTEs than the 40-nm nanocomposites for equal volume fractions. The largest decrease in CTE was 27.0% for 20.7 vol % 40-nm Fumed Silica. When the data were compared to applicable theory, the best fit of the data was given by Schapery's upper limit and Shi's model. Estimates of the interphase volume fraction and effective thickness surrounding the nanoparticles were made with the results of Shi's model, and the results showed that the interphase volume fraction was larger for the 12-nm Fumed Silica nanocomposites, given an equal fraction of Silica. The glass-transition temperature of the nanocomposites from thermomechanical analysis varied only slightly with the volume fraction. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
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Dynamic mechanical analysis of Fumed Silica/cyanate ester nanocomposites
Composites Part A-applied Science and Manufacturing, 2008Co-Authors: W.k. Goertzen, Michael R. KesslerAbstract:Fumed Silica particles with average primary particle diameters of 12 and 40 nm were combined with a low viscosity bisphenol E cyanate ester resin to form composite materials with enhanced storage modulus and reduced damping behavior, as evidenced by dynamic mechanical analysis (DMA). The storage modulus increased with volume fraction of Fumed Silica in both the glassy and rubbery regions, but the increase was more pronounced in the rubbery region. The maximum increase in storage modulus in the glassy region was 75% for 20.7 vol% of 40 nm Fumed Silica, while the same composition showed a 231% increase in the rubbery storage modulus. Furthermore, decreases in damping behavior were used to estimate the effective polymer-particle interphase thickness. The glass transition temperature of the nanocomposites was not changed significantly with increasing volume fraction.
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dynamic mechanical analysis of Fumed Silica cyanate ester nanocomposites
Composites Part A-applied Science and Manufacturing, 2008Co-Authors: W.k. Goertzen, Michael R. KesslerAbstract:Fumed Silica particles with average primary particle diameters of 12 and 40 nm were combined with a low viscosity bisphenol E cyanate ester resin to form composite materials with enhanced storage modulus and reduced damping behavior, as evidenced by dynamic mechanical analysis (DMA). The storage modulus increased with volume fraction of Fumed Silica in both the glassy and rubbery regions, but the increase was more pronounced in the rubbery region. The maximum increase in storage modulus in the glassy region was 75% for 20.7 vol% of 40 nm Fumed Silica, while the same composition showed a 231% increase in the rubbery storage modulus. Furthermore, decreases in damping behavior were used to estimate the effective polymer-particle interphase thickness. The glass transition temperature of the nanocomposites was not changed significantly with increasing volume fraction.
Wang Yue-lin - One of the best experts on this subject based on the ideXlab platform.
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Status Quo of Fumed Silica Industry and Its Development Trend in China
Fine and Specialty Chemicals, 2008Co-Authors: Wang Yue-linAbstract:The status quo and market situation of Fumed Silica industry in China were summarized. The development trend and existing problems of domestic Fumed Silica industry were analyzed. The beneficial relationship mutually between industries of Fumed Silica, polycrystalline silicon and silicone were discussed And the development suggestions for it were put forward.
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Comparison of Fumed Silica for gel battery with different source
Chinese Journal of Power Sources, 2007Co-Authors: Wang Yue-linAbstract:The properties of Fumed Silica made in China and German were studied by XRD,IR spectra,viscosity and EIS measurement.The results indicate that the Fumed Silica with surface area of 200 m2/g has superior performance than that of 300 m2/g in gel battery. The concentration of Fumed Silica should be controlled less than 15% and the optimum concentration is 6%, the optimum dispersing time is one hour at 3 600 r/min. The Fumed Silica made in China and German possessed have the same crystal structure. The Fumed Silica from Germany showed better gelling ability and higher surface active, so the gelled-electrolyte showed higher gelling intensity and conductivity, but higher charge-transfer resistance.
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The dispersion of Fumed Silica in the media of liquid
2006Co-Authors: Wang Yue-linAbstract:The structure and thickening property of Fumed Silica were introduced, and the effects of type of liquid, the consistence, type, dispersion, pH of the system, temperature, components, and additives on the thickening properties of Fumed Silica was discussed. The optimal equipment and dispersing methods for Fumed Silica with different amount and systems were discussed.
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Progress and prospect of Fumed Silica industry in China.
2005Co-Authors: Wang Yue-linAbstract:The development of Fumed Silica industry, as well as the market status and technological progress of Fumed Silica in China were summarized. The problems in Fumed Silica industry in China were analyzed, and some suggestions were made.
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Characteristics of Fumed Silica and its application in silicone rubber.
2004Co-Authors: Wang Yue-linAbstract:The development of Fumed Silica and its production in China were reviewed.The structure and the surface characteristics of Fumed Silica and its application in HTV silicone rubber and RTV silicone rubber were introduced as well.
Saad A Khan - One of the best experts on this subject based on the ideXlab platform.
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Inhibition of Lithium Dendrites by Fumed Silica-Based Composite Electrolytes
Journal of The Electrochemical Society, 2004Co-Authors: Xiangwu Zhang, Saad A Khan, Peter S. FedkiwAbstract:Lithium dendrite formation is investigated via in situ microscopy in a liquid electrolyte containing polyethylene glycol dimethyl ether 1 lithium bis~trifluoromethylsulfonyl !imide and composite gel-like electrolytes formed by dispersing nanometer-size Fumed Silica into the liquid. Fumed Silicas with either hydrophilic silanol surface groups or hydrophobic octyl surface groups were employed. Dendrites with current density-dependent morphology are formed in liquid electrolyte but addition of Fumed Silica inhibits their formation, with hydrophilic Fumed Silica having a more pronounced effect than hydrophobic Silica. The dendrite inhibition effect of Fumed Silica is attributed to its abilities to form a continuous network with elastic-like properties and scavenge impurities from the electrolyte.
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Interfacial stability between lithium and Fumed Silica-based composite electrolytes
Journal of The Electrochemical Society, 2002Co-Authors: Jian Zhou, Peter S. Fedkiw, Saad A KhanAbstract:Composite electrolytes consisting of methyl-capped poly(ethylene glycol) oligomer (Mw 250), lithium bis(trifluoromethylsulfonyl)imide (Li:O = 1:20), and Fumed Silica were investigated. In particular, the effects of Fumed Silica-surface chemistry and weight percentage in the composite on cycling behavior of Li/electrolyte/Li, Li(Ni)/electrolyte/Li, and Li/electrolyte/metal oxide cells were studied. Four types of Fumed silieas with various surface groups were employed, A200 (native hydroxyl groups), R805 (octyl-modified), R974 (methyl-modified), and FS-EG3 (ethylene oxide-modifed). The presence of Fumed Silica enhances lithium cyclability by reducing the interfacial resistance and cell-capacity fading, regardless of surface chemistry. However, the extent of the enhancing effect of Fumed Silica strongly depends on its surface chemistry, with the largest effect seen with A200 and the least effect seen with FS-EG3. Increasing Fumed Silica weight fraction intensifies the stabilizing effect.
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Fumed Silica-based composite polymer electrolytes: Synthesis, rheology, and electrochemistry
Journal of Power Sources, 2000Co-Authors: H. J. Walls, Micah K. Stowe, Jian Zhou, Jeffrey A. Yerian, Peter S. Fedkiw, Saad A Khan, Gregory L BakerAbstract:An overview of our research is presented on developing composite polymer electrolytes (CPEs) based on low-molecular weight polyethylene oxide (PEO) (namely, poly(ethylene glycol) dimethyl ether), lithium salts (e.g. lithium triflate, lithium imide, etc.), and Fumed Silica. These CPEs demonstrate high room-temperature conductivites (>10-3S/cm), mechanical strength, and form stable interfaces with lithium metal as a result of the Fumed Silica. The surface groups on the Fumed Silica determine the mechanical properties of the CPE while the low-molecular weight PEO and lithium salt determine the ionic transport properties. These CPEs show promise as electrolytes for the next generation of rechargeable lithium batteries.
