The Experts below are selected from a list of 156 Experts worldwide ranked by ideXlab platform
Xingqin Liu - One of the best experts on this subject based on the ideXlab platform.
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Asymmetric porous cordierite hollow fiber membrane for microfiltration
Journal of Alloys and Compounds, 2009Co-Authors: Xiaozhen Zhang, Daru Fang, Bin Lin, Yingchao Dong, Guangyao Meng, Xingqin LiuAbstract:Abstract Cordierite hollow fiber membranes have been developed by a combined phase inversion and sintering technique. The spinning suspension was prepared from cordierite powder, polyethersulfone (PES) as polymer binder, N-methyl-2-pyrrolidone (NMP) as solvent and polyvinylpyrrolidone (PVP) as additive. The particle size of cordierite powders has important influence on the microstructure of the prepared hollow fiber membranes. The hollow fiber membranes, derived from cordierite powder with larger particle size (d50 = 7.8 μm), show the asymmetric structure including the inner Macro-Void structure and the outer thin sponge-like structure. The influences of sintering temperature on the microstructure, porosity, pore size distribution, gas permeability, bending strength and thermal expansion were investigated in detail. Results show that the asymmetric and porous cordierite hollow fiber membrane with a nitrogen permeate flux of 745 m3 m−2 h−1 bar−1, bending strength of 76.5 MPa, and linear thermal expansion coefficient of 2.39 × 10−6 °C−1 can be obtained when sintered at 1360 °C for 2 h. This work indicates that the asymmetric cordierite hollow fiber membrane for microfiltration can be prepared by one step, using industrial grade powders with relatively large particle size as raw material.
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Asymmetric porous cordierite hollow fiber membrane for microfiltration
Journal of Alloys and Compounds, 2009Co-Authors: Xiaozhen Zhang, Daru Fang, Bin Lin, Yingchao Dong, Guangyao Meng, Xingqin LiuAbstract:Cordierite hollow fiber membranes have been developed by a combined phase inversion and sintering technique. The spinning suspension was prepared from cordierite powder, polyethersulfone (PES) as polymer binder, N-methyl-2-pyrrolidone (NMP) as solvent and polyvinylpyrrolidone (PVP) as additive. The particle size of cordierite powders has important influence on the microstructure of the prepared hollow fiber membranes. The hollow fiber membranes, derived from cordierite powder with larger particle size (d50 = 7.8 μm), show the asymmetric structure including the inner Macro-Void structure and the outer thin sponge-like structure. The influences of sintering temperature on the microstructure, porosity, pore size distribution, gas permeability, bending strength and thermal expansion were investigated in detail. Results show that the asymmetric and porous cordierite hollow fiber membrane with a nitrogen permeate flux of 745 m3 m-2 h-1 bar-1, bending strength of 76.5 MPa, and linear thermal expansion coefficient of 2.39 × 10-6 °C-1 can be obtained when sintered at 1360 °C for 2 h. This work indicates that the asymmetric cordierite hollow fiber membrane for microfiltration can be prepared by one step, using industrial grade powders with relatively large particle size as raw material. © 2009 Elsevier B.V. All rights reserved.link_to_subscribed_fulltex
Xiaozhen Zhang - One of the best experts on this subject based on the ideXlab platform.
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Asymmetric porous cordierite hollow fiber membrane for microfiltration
Journal of Alloys and Compounds, 2009Co-Authors: Xiaozhen Zhang, Daru Fang, Bin Lin, Yingchao Dong, Guangyao Meng, Xingqin LiuAbstract:Abstract Cordierite hollow fiber membranes have been developed by a combined phase inversion and sintering technique. The spinning suspension was prepared from cordierite powder, polyethersulfone (PES) as polymer binder, N-methyl-2-pyrrolidone (NMP) as solvent and polyvinylpyrrolidone (PVP) as additive. The particle size of cordierite powders has important influence on the microstructure of the prepared hollow fiber membranes. The hollow fiber membranes, derived from cordierite powder with larger particle size (d50 = 7.8 μm), show the asymmetric structure including the inner Macro-Void structure and the outer thin sponge-like structure. The influences of sintering temperature on the microstructure, porosity, pore size distribution, gas permeability, bending strength and thermal expansion were investigated in detail. Results show that the asymmetric and porous cordierite hollow fiber membrane with a nitrogen permeate flux of 745 m3 m−2 h−1 bar−1, bending strength of 76.5 MPa, and linear thermal expansion coefficient of 2.39 × 10−6 °C−1 can be obtained when sintered at 1360 °C for 2 h. This work indicates that the asymmetric cordierite hollow fiber membrane for microfiltration can be prepared by one step, using industrial grade powders with relatively large particle size as raw material.
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Asymmetric porous cordierite hollow fiber membrane for microfiltration
Journal of Alloys and Compounds, 2009Co-Authors: Xiaozhen Zhang, Daru Fang, Bin Lin, Yingchao Dong, Guangyao Meng, Xingqin LiuAbstract:Cordierite hollow fiber membranes have been developed by a combined phase inversion and sintering technique. The spinning suspension was prepared from cordierite powder, polyethersulfone (PES) as polymer binder, N-methyl-2-pyrrolidone (NMP) as solvent and polyvinylpyrrolidone (PVP) as additive. The particle size of cordierite powders has important influence on the microstructure of the prepared hollow fiber membranes. The hollow fiber membranes, derived from cordierite powder with larger particle size (d50 = 7.8 μm), show the asymmetric structure including the inner Macro-Void structure and the outer thin sponge-like structure. The influences of sintering temperature on the microstructure, porosity, pore size distribution, gas permeability, bending strength and thermal expansion were investigated in detail. Results show that the asymmetric and porous cordierite hollow fiber membrane with a nitrogen permeate flux of 745 m3 m-2 h-1 bar-1, bending strength of 76.5 MPa, and linear thermal expansion coefficient of 2.39 × 10-6 °C-1 can be obtained when sintered at 1360 °C for 2 h. This work indicates that the asymmetric cordierite hollow fiber membrane for microfiltration can be prepared by one step, using industrial grade powders with relatively large particle size as raw material. © 2009 Elsevier B.V. All rights reserved.link_to_subscribed_fulltex
Stefan Heinrich - One of the best experts on this subject based on the ideXlab platform.
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Dependencies between internal structure and mechanical properties of spray dried granules – Experimental study and DEM simulation
Advanced Powder Technology, 2017Co-Authors: Susanna Eckhard, Manfred Fries, Sergiy Antonyuk, Stefan HeinrichAbstract:Abstract The mechanical properties of spray dried granules are decisive with regard to further applications and can be modified via internal granule structure. To obtain the correlations between structural and mechanical properties, necessary experiments are often time and resource consuming. The simulation of varied granule structures and their effect on resulting mechanical properties seems to be a promising approach. In this paper, a model of the particulate internal structure of a spray dried granule was generated with the Discrete Element Method (DEM) based on real structure parameters. The model considers real primary particle number, particle size distribution and radial granule inhomogeneity, what results in the implementation of granule shell thickness and Macro Void. The internal structure of simulated granules showed significant influence on their mechanical properties. An increase of granule shell thickness and packing density of the primary particles within the shell results in fracture strength increase accompanied by decreasing fracture strain. The simulated reduction of the solid bridge bond size between the primary particles representing the decreasing binder amount leads to decreasing fracture strength and strain as previously determined experimentally (Eckhard et al., 2014). Consequently, the DEM is appropriate for evaluating the effect of changed real internal structure parameters on resulting mechanical granule properties.
Lauri Rautkari - One of the best experts on this subject based on the ideXlab platform.
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Experimental techniques for characterising water in wood covering the range from dry to fully water-saturated
Wood Science and Technology, 2018Co-Authors: Emil Engelund Thybring, Maija Kymäläinen, Lauri RautkariAbstract:Water plays a central role in wood research, since it affects all material properties relevant to the performance of wood materials. Therefore, experimental techniques for characterising water within wood are an essential part of nearly all scientific investigations of wood materials. This review focuses on selected experimental techniques that can give deeper insights into various aspects of water in wood in the entire moisture domain from dry to fully water-saturated. These techniques fall into three broad categories: (1) gravimetric techniques that determine how much water is absorbed, (2) fibre saturation techniques that determine the amount of water within cell walls, and (3) spectroscopic techniques that provide insights into chemical wood–water interactions as well as yield information on water distribution in the Macro-Void wood structure. For all techniques, the general measurement concept is explained, its history in wood science as well as advantages and limitations.
Daru Fang - One of the best experts on this subject based on the ideXlab platform.
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Asymmetric porous cordierite hollow fiber membrane for microfiltration
Journal of Alloys and Compounds, 2009Co-Authors: Xiaozhen Zhang, Daru Fang, Bin Lin, Yingchao Dong, Guangyao Meng, Xingqin LiuAbstract:Abstract Cordierite hollow fiber membranes have been developed by a combined phase inversion and sintering technique. The spinning suspension was prepared from cordierite powder, polyethersulfone (PES) as polymer binder, N-methyl-2-pyrrolidone (NMP) as solvent and polyvinylpyrrolidone (PVP) as additive. The particle size of cordierite powders has important influence on the microstructure of the prepared hollow fiber membranes. The hollow fiber membranes, derived from cordierite powder with larger particle size (d50 = 7.8 μm), show the asymmetric structure including the inner Macro-Void structure and the outer thin sponge-like structure. The influences of sintering temperature on the microstructure, porosity, pore size distribution, gas permeability, bending strength and thermal expansion were investigated in detail. Results show that the asymmetric and porous cordierite hollow fiber membrane with a nitrogen permeate flux of 745 m3 m−2 h−1 bar−1, bending strength of 76.5 MPa, and linear thermal expansion coefficient of 2.39 × 10−6 °C−1 can be obtained when sintered at 1360 °C for 2 h. This work indicates that the asymmetric cordierite hollow fiber membrane for microfiltration can be prepared by one step, using industrial grade powders with relatively large particle size as raw material.
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Asymmetric porous cordierite hollow fiber membrane for microfiltration
Journal of Alloys and Compounds, 2009Co-Authors: Xiaozhen Zhang, Daru Fang, Bin Lin, Yingchao Dong, Guangyao Meng, Xingqin LiuAbstract:Cordierite hollow fiber membranes have been developed by a combined phase inversion and sintering technique. The spinning suspension was prepared from cordierite powder, polyethersulfone (PES) as polymer binder, N-methyl-2-pyrrolidone (NMP) as solvent and polyvinylpyrrolidone (PVP) as additive. The particle size of cordierite powders has important influence on the microstructure of the prepared hollow fiber membranes. The hollow fiber membranes, derived from cordierite powder with larger particle size (d50 = 7.8 μm), show the asymmetric structure including the inner Macro-Void structure and the outer thin sponge-like structure. The influences of sintering temperature on the microstructure, porosity, pore size distribution, gas permeability, bending strength and thermal expansion were investigated in detail. Results show that the asymmetric and porous cordierite hollow fiber membrane with a nitrogen permeate flux of 745 m3 m-2 h-1 bar-1, bending strength of 76.5 MPa, and linear thermal expansion coefficient of 2.39 × 10-6 °C-1 can be obtained when sintered at 1360 °C for 2 h. This work indicates that the asymmetric cordierite hollow fiber membrane for microfiltration can be prepared by one step, using industrial grade powders with relatively large particle size as raw material. © 2009 Elsevier B.V. All rights reserved.link_to_subscribed_fulltex
