基于分形理论的竹炭孔隙度与比表面积的探索
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摘要
竹炭孔隙的空间分布十分复杂。根据分形理论和竹炭多孔状及各向异性的构造特征,参照竹炭扫描电镜照片,模仿Sierpinski地毯的构造方法,运用Matlab软件建立了一个描述竹炭孔隙空间分布状况的随机分形模型,并给出分形模型中孔隙度和比表面积与迭代次数的关系。当迭代次数为10,最小孔径达到1 nm时,竹炭分形模型孔隙度是0.825,比表面积为213.6 m2·g-1。
According to fractal theory,bamboo charcoal's porous structure and anisotropy characteristics,reference scanning electron microscopy(SEM) images of bamboo charcoal,and imitation of the Sierpinski carpet generation method,a random fractal model of bamboo charcoal was established.Then,using Matlab software to simulate porous bamboo charcoal pore space distribution,the relationship between porosity and specific surface area for a number of iterations was obtained.When the number of iterations was 10 and the smallest diameter was 1 nm,the bamboo charcoal fractal model porosity was 0.825 with a specific surface area of 213.6 m2·g-1.
引文
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