Toward the prediction of porous membrane permeability from morphological data

Abstract

One of the challenges in membrane technology is predicting permeability in porous membranes for liquid applications in an easy and inexpensive way. This is the aim of this work. To achieve this objective, several techniques can be considered. In this study, a morphological approach from two‐dimensional scanning electron micrographs is proposed. First, numerical membrane morphological parameters have been determined from micrographs by using the QUANTS tool, which applies a texture recognition process. Second, the obtained data have been fit to the Darcy's and Hagen–Poiseuille models to calculate permeations. The QUANTS results have also been compared with the ones obtained through a mercury porosimeter, which is a classic and well‐known methodology. Each parameter of the Hagen–Poiseuille model has been analyzed. A comparison between experimentally measured permeations and calculated ones has been performed. An even easier approach is proposed to predict flow rate with the only knowledge of membrane surface mean pore size. This method is based on cross‐section pore size interpolation by using function fits from surface mean pore sizes. The obtained results show a reasonable agreement between measured and computed results, making this technique a valid approach for predicting membrane permeability. POLYM. ENG. SCI., 56:118–124, 2016. © 2015 Society of Plastics Engineers

Application of Colloidal Precipitation Method Using Sodium Polymethacrylate as Dispersant for TiO2/PVDF Membrane Preparation and Its Antifouling Properties

“…Membrane porosity ε (%) was determined as a function of its dry–wet weight using the following equation: where m w is weight of the wet membrane (g); m d is weight of the dry membrane (g); ρ w is water density (0.998 g cm −3 ), A is the membrane area (cm 2 ) and δ is the membrane thickness (cm) . The membrane thickness was measured by an Electronic outside micrometer (Model 3109–25).…”

“…where m w is weight of the wet membrane (g); m d is weight of the dry membrane (g); ρ w is water density (0.998 g cm −3 ), A is the membrane area (cm 2 ) and δ is the membrane thickness (cm) [22][23][24][25][26]. The membrane thickness was measured by an Electronic outside micrometer (Model 3109-25).…”

Pembuatan membran komposit nilon-karbon aktif dengan variasi suhu dan waktu pengadukan

“…Sublayer tersebut merupakan lapisan dengan miskin nilon dan kaya akan karbon aktif dan merupakan sisi selektif membran. Dimana berdasarkan morfologi tampak melintang membran, sisi selektif merupakan sisi yang memiliki nilai rata-rata pori yang kecil (Nurra, 2016). Selain dikarenakan membran memiliki komposisi nilon dan karbon aktif, pembentukan sub layer dapat terjadi ketika tahap pencetakan membran.…”