排序方式: 共有94条查询结果,搜索用时 15 毫秒
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哑铃形碳化硅晶须增强聚氯乙烯(PVC)复合材料的制备和性能 总被引:7,自引:0,他引:7
研究了平直晶须和哑铃形仿生SiC晶须增强聚氯乙烯(PVC)复合材料的微观结构和力学性能,结果表明,与平直SiC晶须相比,哑铃形仿生SiC晶须在提高复合材料的同时还成倍地提高其延伸率,由于仿生晶须上小球的存在使复合材料中各部位处于均匀受力状态,裂纹不易在局部过早形成,同时,由于仿生晶须在拔出过程中起桥连的作用,所以复合材料的强度降低很小而延伸率得以增加,在加载过程中仿生晶须逐渐从PVC基体中拔出,在达到晶须断裂强度时在球颈颈处发生断裂,由于仿生晶须的增强和增韧机理是通过晶须上的小球在基体和晶须之间传递应力,因此其增强,增韧效果对于复合材料中的界面结合情况是不敏感的。 相似文献
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Pore structure of SWNTs with high hydrogen storage capacity 总被引:6,自引:0,他引:6
This paper reveals, by analyses of nitrogen cryo-adsorption isotherm, the energetic and structural heterogeneity of single-walled carbon nanotubes (SWNTs) which has a high hydrogen storage capacity. It was found that SWNTs had manifold pore structures and distributed surface energy. By comparison of the pore structures and energy distributions of SWNTs before and after hydrogen adsorption, it is preliminarily indicated that hydrogen adsorption occurred in micropores and mesopores with smaller diameter, and that the pores of different diameters determined different hydrogen adsorption processes and underwent different structure changes during hydrogen adsorption. 相似文献
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单壁纳米碳管的研究进展 总被引:3,自引:0,他引:3
综述了当前单壁纳米碳管的研制状况,对单纳米碳管的制备方法,结构特征,性能和应用前景进行了讨论,并且对单壁纳米碳管的新制备方法-本研究组独创的有机物气相催化热解法进行论述。 相似文献
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