Based on the photographic observation and analysis of different cross section of the materials,it is found that both the section of normal and warp yarns are rectangular in shape,the sections of weft yarns are the con...
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Based on the photographic observation and analysis of different cross section of the materials,it is found that both the section of normal and warp yarns are rectangular in shape,the sections of weft yarns are the convex lens in shape,the weft and normal yarns are kept straight along their directions,the warp yarns are wavy.3D images and geometry model of normal yarns reinforced 2.5D woven materials are *** model can be used to calculate the fiber volume fraction of each yarn *** with the experimental data,the computational results show excellent *** work will lay the foundation for prediction of mechanical properties.
Three distinct Ge nanoparticle-filled carbon nanofiber (CNF) composites, [email protected] , [email protected] @CNF and [email protected] @C, were fabricated by chemical vapor deposition (CVD) and elect...
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Three distinct Ge nanoparticle-filled carbon nanofiber (CNF) composites, [email protected] , [email protected] @CNF and [email protected] @C, were fabricated by chemical vapor deposition (CVD) and electrospinning techniques. These different structures were prepared by: 1) dispersing Ge nanoparticles into CNF, 2) adding carbon-coated Ge nanoparticles ( [email protected] ) prepared by CVD into CNF, and 3) depositing CVD carbon onto [email protected] , respectively. Compared with the [email protected] composite, both [email protected] @CNF and [email protected] @C had additional amorphous carbon coating fabricated by the CVD method. The three composites were studied as binder-free electrodes for rechargeable lithium-ion batteries. Raw Ge anode materials suffered from serious volume changes and nanoparticle aggregations during cycling, resulting in pulverization and capacity loss. However, carbon nanofiber and the supplemental CVD carbon layer in these nanofiber composites could help preserve the structural integrity of the alloy anode materials during repeated cycling, and consequently, lead to improved cycling stability. In this work, it was found that among the three composites, [email protected] @C exhibited the highest capacity retention of 89% at the 50th cycle due to the structurally-durable thorn-like Ge morphology and the additional CVD carbon confinement. [email protected] and [email protected] @CNF encountered rapid capacity loss because large Ge clusters were formed and jeopardized the integrity of the electrode structure during cycling.
Graphene,a two-dimensional single-layer of graphite,has attracted significant interests as one of the most attractive and potential materials in recent years due to its tremendously large surface area and remarkable h...
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Graphene,a two-dimensional single-layer of graphite,has attracted significant interests as one of the most attractive and potential materials in recent years due to its tremendously large surface area and remarkable high structural,electrical,thermal and mechanical *** oxide(GO)has a wide range of functional
The influence of interface coherence between organic polymer matrix and metal/metal oxide reinforcement is investigated, based on the anchoring density at the interface. Methods of increasing anchoring density, as wel...
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The influence of interface coherence between organic polymer matrix and metal/metal oxide reinforcement is investigated, based on the anchoring density at the interface. Methods of increasing anchoring density, as well as the resulting enhanced mechanical properties are also proposed.
A novel superabsorbent, clay/polyacrylamide nanocomposite hydrogels(S-M gel), has been successfully prepared. It was found that the properties of S-M gel can be modulated by post treatment;the swelling ratio of S-M ge...
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ISBN:
(纸本)9787122012234
A novel superabsorbent, clay/polyacrylamide nanocomposite hydrogels(S-M gel), has been successfully prepared. It was found that the properties of S-M gel can be modulated by post treatment;the swelling ratio of S-M gels increases greatly by heat post treatment, much more than any other reported NC gels. Experimental results indicate that the improvements in swelling ratio are due to the physical structure changes of S-M gels. This finding will help to further investigate the structure of NC gels, and present a new approach to control the properties and structure of NC gels.
Adsorbent of calcium alginate/multi-walled carbon nanotubes (CA/MWCNTs) composite fiber was prepared by wet spinning. Adsorptions of methyl orange (MO) anionic dyes onto CA/MWCNTs composite fiber were investigated wit...
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Adsorbent of calcium alginate/multi-walled carbon nanotubes (CA/MWCNTs) composite fiber was prepared by wet spinning. Adsorptions of methyl orange (MO) anionic dyes onto CA/MWCNTs composite fiber were investigated with respect to MWCNTs content, initial dye concentration and pH values. Results illustrated that introduction of MWCNTs could obviously increase the adsorption capacity ( qe ) of MO onto CA/MWCNTs composite fibers. The equilibrium adsorption data were analyzed using two widely applied isotherms: Langmuir and Freundlich. The results showed that Langmuir isotherm fitted the experimental results well.
Adsorbent of calcium alginate/multi-walled carbon nanotubes(CA/MWCNTs) composite fiber was prepared by wet spinning. Adsorptions of methyl orange(MO) anionic dyes onto CA/MWCNTs composite fiber were investigated with ...
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Adsorbent of calcium alginate/multi-walled carbon nanotubes(CA/MWCNTs) composite fiber was prepared by wet spinning. Adsorptions of methyl orange(MO) anionic dyes onto CA/MWCNTs composite fiber were investigated with respect to MWCNTs content, initial dye concentration and p H values. Results illustrated that introduction of MWCNTs could obviously increase the adsorption capacity(qe) of MO onto CA/MWCNTs composite fibers. The equilibrium adsorption data were analyzed using two widely applied isotherms: Langmuir and Freundlich. The results showed that Langmuir isotherm ?tted the experimental results well.
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