【摘要】 与电子显微镜观察法(TEM)相比,用氮气吸附法测定棉纤维孔结构是一种更有效的方法,它可以进行大容量试样测量和得到更多的孔结构信息。通过解析吸附等温线和DFT分析对棉纤维孔结构(孔体积、孔直径分布)进行表征。结果表明:在棉纤维内部存在开放的孔隙,孔径为2.2 nm的孔体积分布密度最大,孔径在2.0~4.0 nm的孔体积占总孔体积的68.16%,孔径超过5.0 nm的孔体积占总体积的18.49%。更多还原

【Abstract】 Nitrogen adsorption is more effective than transmission electron microscope(TEM) in the study of pore structure of cotton fiber.It can be applied to a lot of samples,and more information of pore structure parameters can be acquired.By use of nitrogen adsorption isotherm and of density function theory(DFT) analysis,the pore structures of cotton fiber,such as micropore volume and pore size distributions,were characterized.The results show that cotton fiber contains open pores,the maximum value of pore size distribution appears at 2.2 nm.The pore volume with diameter ranging from 2.0 to 4.0 nm makes up 68.16% of the total,and larger than 5.0 nm,18.49%.更多还原