The Experts below are selected from a list of 270921 Experts worldwide ranked by ideXlab platform
Shunxi Song - One of the best experts on this subject based on the ideXlab platform.
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starch sodium stearate modified fly ash based calcium silicate effect of different modification routes on paper properties
Bioresources, 2016Co-Authors: Meiyun Zhang, Shunxi SongAbstract:Different modification routes using fly ash-based calcium silicate (FACS) with starch/sodium stearate were explored to mitigate the negative effect of Filler on paper strength and allow for improved Filler content. The morphology of the modified Fillers and the properties of the filled paper were investigated. The modification route was found to be critical to the amount of starch/sodium stearate deposited on the surface of the Filler particles. The most suitable modification route using FACS Filler was as follows: starch (20% dosage on o.d. Filler) was cooked, Filler was added, and then sodium stearate was added (4% dosage on o.d. Filler). The tensile index of the FACS-filled paper could be increased by 22% at 30% Filler content under the best modification route. The brightness and bulk of the filled paper were also improved. However, the opacity of the filled paper was slightly decreased due to the deposition of starch/sodium stearate on the porous surface of the Filler particles.
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Starch/Sodium Stearate Modified Fly-Ash Based Calcium Silicate: Effect of Different Modification Routes on Paper Properties
Bioresources, 2016Co-Authors: Li Lin, Meiyun Zhang, Shunxi SongAbstract:Different modification routes using fly ash-based calcium silicate (FACS) with starch/sodium stearate were explored to mitigate the negative effect of Filler on paper strength and allow for improved Filler content. The morphology of the modified Fillers and the properties of the filled paper were investigated. The modification route was found to be critical to the amount of starch/sodium stearate deposited on the surface of the Filler particles. The most suitable modification route using FACS Filler was as follows: starch (20% dosage on o.d. Filler) was cooked, Filler was added, and then sodium stearate was added (4% dosage on o.d. Filler). The tensile index of the FACS-filled paper could be increased by 22% at 30% Filler content under the best modification route. The brightness and bulk of the filled paper were also improved. However, the opacity of the filled paper was slightly decreased due to the deposition of starch/sodium stearate on the porous surface of the Filler particles.
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The potential of fly ash-based calcium silicate as paper Filler: Physical properties and printability
October, 2014Co-Authors: Shunxi Song, Meiyun Lt Zhang, Jian Wang, Zhirun Yuan, Sun JunminAbstract:The development and application of low-cost and high-performance Fillers by the paper industry is one of the most interesting aspects of Filler technology. A novel calcium silicate, a byproduct, known as fly ashbased calcium silicate (FACS), from the value-added use of fly ash of coal-fired power plants, can be used as paper Filler. To simulate the industrial papermaking process, a dynamic sheet former was used to evaluate the effect of FACS on the physical properties and printability of calendered paper. The results were compared with those of commonly used Fillers, i.e., ground calcium carbonate (GCC) and precipitated calcium carbonate (PCC). FACS-filled paper delivered a higher bulk than GCC-filled or PCC-filled papers at a given paper roughness. In addition, use of the original FACS exerted less influence on the tensile and tear strength of the filled paper. Printing quality tests indicated that at the same print density, the ink demand of FACS-filled paper was higher than that of GCC-filled or PCC-filled papers, but lower print through was obtained at the same amount of ink transferred to paper. The paper sheets containing the original FACS exhibited better surface strength than PCC-filled sheets. The results support the potential use of FACS as a low-cost Filler for fine paper production.
Laurent Chazeau - One of the best experts on this subject based on the ideXlab platform.
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Role of temperature during ageing under gamma irradiation of filled EPDM: consequences on mechanical properties
Journal of Polymer Science Part B: Polymer Physics, 2010Co-Authors: Emilie Planes, Laurent Chazeau, Gerard VigierAbstract:Filled EPDM materials have been processed and aged by gamma radiation at ambient temperature and at 80 � C to study the influence of the Fillers presence in the material degradation. The acceleration of the polymer degradation by the ATH Fillers, evidenced when irradiation is performed at 25 � C, is also effective at 80 � C. In addition, in the case of silica-filled EPDM, the creation of strong Filler-matrix bonds, already reported for irradiation at 25 � C, is also thermally activated; this enables to this material to keep its integrity at high irradiation dose, whereas the irradiated ATH-filled EPDM is so degraded that it flows. Thus, the introduction of Fillers in the polymer has an impact on its resistance to irra- diation, whatever the temperature at which the irradiation is performed. Moreover, the consequences of the degradation on the evolution of the mechanical properties of the compos- ite are very dependent on the Filler nature. V C 2010 Wiley Peri- odicals, Inc. J Polym Sci Part B: Polym Phys 48: 1319-1328, 2010
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Role of Temperature During Ageing Under Gamma Irradiation of Filled EPDM: Consequences on Mechanical Properties
Journal of Polymer Science Part B: Polymer Physics, 2010Co-Authors: Emilie Planes, Laurent Chazeau, Gerard VigierAbstract:Filled EPDM materials have been processed and aged by gamma radiation at ambient temperature and at 80 degrees C to study the influence of the Fillers presence in the material degradation. The acceleration of the polymer degradation by the ATH Fillers, evidenced when irradiation is performed at 25 degrees C, is also effective at 80 degrees C. In addition, in the case of silica-filled EPDM, the creation of strong Filler-matrix bonds, already reported for irradiation at 25 degrees C, is also thermally activated; this enables to this material to keep its integrity at high irradiation dose, whereas the irradiated ATH-filled EPDM is so degraded that it flows. Thus, the introduction of Fillers in the polymer has an impact on its resistance to irradiation, whatever the temperature at which the irradiation is performed. Moreover, the consequences of the degradation on the evolution of the mechanical properties of the composite are very dependent on the Filler nature.
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Influence of silica Fillers on the ageing by gamma radiation of EDPM nanocomposites
Composites Science and Technology, 2010Co-Authors: Emilie Planes, Laurent Chazeau, Gerard Vigier, Thomas StuhldreierAbstract:This study evidences that the presence of silica Fillers as well as their surface treatment influences the impact of gamma irradiation on the mechanical properties of the filled materials. It influences it both chemically, by a modification of the kinetics of the degradation reactions, and physically, through the complex modification of the Filler-Filler and Filler-matrix interactions involved in the mechanical properties of the Filler network. (C) 2010 Elsevier Ltd. All rights reserved.
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Influence of silica Fillers on the ageing by gamma radiation of EDPM nanocomposites
Composites Science and Technology, 2007Co-Authors: Emilie Planes, Laurent Chazeau, Gerard Vigier, Thomas StuhldreierAbstract:This study evidences that the presence of silica Fillers as well as their surface treatment influences the impact of gamma irradiation on the mechanical properties of the filled materials. It influences it both chemically, by a modification of the kinetics of the degradation reactions, and physically, through the complex modification of the Filler-Filler and Filler-matrix interactions involved in the mechanical properties of the Filler network.
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New insights into the cold crystallization of filled natural rubber
Journal of Polymer Science Part B: Polymer Physics, 2007Co-Authors: J.-m. Chenal, Laurent Chazeau, Y. Bomal, Catherine GauthierAbstract:This article is devoted to the cold crystallization of filled natural rubber with different types of Filler such as carbon black, silica, and grafted silica. A large set of differential scanning calorimetry data is presented with various scanning rates, times, and temperatures of isothermal crystallization to display the factors affecting natural rubber (NR) crystallization. The crystallization kinetic measurements suggest that Fillers can create a region with perturbed mobility where the kinetics of nucleation and/or growth are slowed down, the rest of the matrix being unperturbed. And, the final crystallization level indicates the existence of an excluded region for crystallization close to the Filler surface. Furthermore, the presence of Fillers appears less unfavorable to NR crystallization than chemical crosslinking.
Meiyun Zhang - One of the best experts on this subject based on the ideXlab platform.
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Starch/Sodium Stearate Modified Fly-Ash Based Calcium Silicate: Effect of Different Modification Routes on Paper Properties
Bioresources, 2016Co-Authors: Li Lin, Meiyun Zhang, Shunxi SongAbstract:Different modification routes using fly ash-based calcium silicate (FACS) with starch/sodium stearate were explored to mitigate the negative effect of Filler on paper strength and allow for improved Filler content. The morphology of the modified Fillers and the properties of the filled paper were investigated. The modification route was found to be critical to the amount of starch/sodium stearate deposited on the surface of the Filler particles. The most suitable modification route using FACS Filler was as follows: starch (20% dosage on o.d. Filler) was cooked, Filler was added, and then sodium stearate was added (4% dosage on o.d. Filler). The tensile index of the FACS-filled paper could be increased by 22% at 30% Filler content under the best modification route. The brightness and bulk of the filled paper were also improved. However, the opacity of the filled paper was slightly decreased due to the deposition of starch/sodium stearate on the porous surface of the Filler particles.
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starch sodium stearate modified fly ash based calcium silicate effect of different modification routes on paper properties
Bioresources, 2016Co-Authors: Meiyun Zhang, Shunxi SongAbstract:Different modification routes using fly ash-based calcium silicate (FACS) with starch/sodium stearate were explored to mitigate the negative effect of Filler on paper strength and allow for improved Filler content. The morphology of the modified Fillers and the properties of the filled paper were investigated. The modification route was found to be critical to the amount of starch/sodium stearate deposited on the surface of the Filler particles. The most suitable modification route using FACS Filler was as follows: starch (20% dosage on o.d. Filler) was cooked, Filler was added, and then sodium stearate was added (4% dosage on o.d. Filler). The tensile index of the FACS-filled paper could be increased by 22% at 30% Filler content under the best modification route. The brightness and bulk of the filled paper were also improved. However, the opacity of the filled paper was slightly decreased due to the deposition of starch/sodium stearate on the porous surface of the Filler particles.
Joseph Kuruvilla - One of the best experts on this subject based on the ideXlab platform.
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impact of Filler geometry and surface chemistry on the degree of reinforcement and thermal stability of nitrile rubber nanocomposites
Journal of Polymer Research, 2011Co-Authors: P C Thomas, Selvin P Thomas, Gejo George, Sabu Thomas, Joseph KuruvillaAbstract:The morphological, mechanical, and thermal stability of Nitrile rubber nanocomposites reinforced with Fillers such as layered silicate (LS), calcium phosphate (CP) and titanium dioxide (TO) having different particle size and chemical nature were analyzed. The results revealed that the Filler geometry played an important role on the mechanical and thermal stability of the composites. Calcium phosphate and titanium dioxide filled systems showed comparatively better mechanical and thermal stability compared to neat rubber. The activation energy needed for the thermal degradation was found to be higher for layered silicate filled system. DSC (Differential Scanning Calorimetry) analysis revealed a change in the Tg values as a result of the addition of Fillers. This was more prominent with the case of layered silicate Filler addition in comparison with calcium phosphate and titanium dioxide. The heat capacity values of the nanocomposites were carefully evaluated. The (∆Cp) with values obtained for different nanocomposites were correlated with the degree of reinforcement. It can be assumed that more polymer chains are attached on to the surface of the Filler and there exists an immobilized layer around the Filler surface and the layers do not take part in the relaxation process. The FTIR spectrum of the different samples highlighted the possible Filler matrix interaction. The Filler dispersion and aggregation in the polymer matrix were analyzed using X-ray diffraction studies (XRD), transmission electron microscopy (TEM), and atomic force microscopy (AFM).
Fabien Vion-loisel - One of the best experts on this subject based on the ideXlab platform.
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Micromechanical modeling of the linear viscoelasticity of carbon-black filled styrene butadiene rubbers: the role of the rubber-Filler interphase
Mechanics of Materials, 2013Co-Authors: Julie Diani, Pierre Gilormini, Yannick Merckel, Fabien Vion-loiselAbstract:Micromechanics modeling of the linear viscoelasticity of carbon-black filled styrene butadiene rubbers (SBR) shows that a simple representation of a spherical rigid-phase surrounded by rubber gum and embedded in an homogeneous equivalent medium provides access to the effective volume fraction of Fillers. This simple representation is successful for a significant range of Filler amount, and for materials in the glassy state. For materials in the rubbery state, experimental results support the existence of a Filler-rubber interphase with reduced mobility due to confinement. The 4-phase micromechanics model, which accounts for a bounded rubber layer coating the Fillers, provides satisfactory estimates of the linear viscoelasticity of filled rubbers from the rubbery state to the glassy state. It also provides access to the Filler rubber interphase behavior that appears viscoelastic, and to an estimate of the interphase thickness.
