Studies on structure of pore space of MGA-95 and ESPA semipermeable membranes by small-angle X-ray scattering

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• 作者：S. I. Lazarev ; Yu. M. Golovin ; D. S. Lazarev ; I. V. Khorokhorina
• 刊名：Petroleum Chemistry
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：56
• 期：5
• 页码：423-426
• 全文大小：583 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Industrial Chemistry and Chemical Engineering
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1555-6239
• 卷排序：56

文摘

The pore space structure of MGA-95 and ESPA membranes has been investigated by the smallangle X-ray scattering (SAXS). The pore radii as the parameters forming the skeleton of the pore space of the reverse-osmosis composite membranes have been established. Three types of scattering pores (sphere, disc, and cylinder) are found in the region of the X-ray scattering vector of 0.171 < s < 0.538 nm−1, and their average radii of gyration have been determined. The pore structure of the MGA-95 and ESPA membranes, which can be described in terms of the self-affine fractal concept, has been revealed. In the region of the scattering vector of 0.245 < s < 0.342 nm−1 (the average pores with 9.2 < r <12.8 nm) the pore structure corresponds to the “stacked sphere” model with the long straight channels with D = 1.2 and D = 1.3 fractal indices. The pores with r~20 nm form the sinuous channels with the fractal indices of D = 2.1 and 2.8, respectively. Scattering at 0.391 < s < 0.538 nm−1 (5.8 < r < 8.0 nm) occurs on compact monopores with the smooth surface and a fractal index of D = 3.9 (D = 4, Porod regime).Keywordsmembranepore spacepore structuresmall-angle X-ray scatteringself-affine fractal