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Investigation of membrane preparation condition effect on the PSD and porosity of the membranes using a novel image processing technique

机译:利用新型图像处理技术研究膜制备条件对膜的PSD和孔隙率的影响

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摘要

A totally computerized image processing program package is developed to analyze the SEM images of membrane surface and cross-section. Pore size distribution and porosity of the fabricated membranes are determined using the proposed image processing procedure. Furthermore, effect of coagulation bath temperature on the morphology and mechanical properties (such as tensile strength, strain break, tensile energy absorbent, and tensile stiffness) of Polysulfone (PSf) membranes are investigated. The results reveal that the mechanical properties are higher when N-methyl-2-pyrrolidone (NMP) is used as solvent. Also, an increase in the coagulation bath temperature caused a monotonous increase in the mean pore size value of Dimethylformamide (DMF)-based membranes. However, mean pore size curve has a maximum when NMP is used as solvent. Also, porosity of the fabricated membranes increased when coagulation bath temperature increased. For the NMP-base membranes, pore's diameter was in the range of 0-5 μm. However, DMF-based membranes have pore size value of smaller than 1 μm when the precipitation medium is kept at 8°C.
机译:开发了一个完全计算机化的图像处理程序包来分析膜表面和横截面的SEM图像。使用所提出的图像处理程序来确定所制造的膜的孔径分布和孔隙率。此外,研究了凝固浴温度对聚砜(PSf)膜的形态和机械性能(如拉伸强度,应变断裂,拉伸能吸收剂和拉伸刚度)的影响。结果表明,当使用N-甲基-2-吡咯烷酮(NMP)作为溶剂时,机械性能更高。另外,凝结浴温度的升高引起基于二甲基甲酰胺(DMF)的膜的平均孔径值的单调增加。但是,当使用NMP作为溶剂时,平均孔径曲线最大。而且,当凝固浴温度升高时,制成的膜的孔隙率增加。对于基于NMP的膜,孔的直径在0-5μm的范围内。然而,当沉淀介质保持在8℃时,基于DMF的膜的孔径小于1μm。

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