scholarly journals Advanced PFA Thin Porous Membranes

10.5772/8405 ◽  
2010 ◽  
Author(s):  
R. A. ◽  
R. L. ◽  
C. Muntele ◽  
D. Il
Keyword(s):  
Porous Membranes

A model for the permeation characteristics of porous membranes with grafted polyelectrolyte brushes

1991 ◽  
Vol 146 (1) ◽  
pp. 251-275 ◽  
Author(s):  
Sanjay Misra ◽  
Sasidhar Varanasi
Keyword(s):  
Porous Membranes ◽  
Polyelectrolyte Brushes

scholarly journals Towards explicit regulating-ion-transport: nanochannels with only function-elements at outer-surface

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Qun Ma ◽  
Yu Li ◽  
Rongsheng Wang ◽  
Hongquan Xu ◽  
Qiujiao Du ◽  
...  
Keyword(s):  
Ion Transport ◽  
Numerical Simulations ◽  
Power Density ◽  
Outer Surface ◽  
Internal Resistance ◽  
Porous Membranes ◽  
Two Dimensional ◽  
Ionic Selectivity ◽  
Key Features ◽  
Energy Conversion Devices

AbstractFunction elements (FE) are vital components of nanochannel-systems for artificially regulating ion transport. Conventionally, the FE at inner wall (FEIW) of nanochannel−systems are of concern owing to their recognized effect on the compression of ionic passageways. However, their properties are inexplicit or generally presumed from the properties of the FE at outer surface (FEOS), which will bring potential errors. Here, we show that the FEOS independently regulate ion transport in a nanochannel−system without FEIW. The numerical simulations, assigned the measured parameters of FEOS to the Poisson and Nernst-Planck (PNP) equations, are well fitted with the experiments, indicating the generally explicit regulating-ion-transport accomplished by FEOS without FEIW. Meanwhile, the FEOS fulfill the key features of the pervious nanochannel systems on regulating-ion-transport in osmotic energy conversion devices and biosensors, and show advantages to (1) promote power density through concentrating FE at outer surface, bringing increase of ionic selectivity but no obvious change in internal resistance; (2) accommodate probes or targets with size beyond the diameter of nanochannels. Nanochannel-systems with only FEOS of explicit properties provide a quantitative platform for studying substrate transport phenomena through nanoconfined space, including nanopores, nanochannels, nanopipettes, porous membranes and two-dimensional channels.

scholarly journals Effect of moisture condensation on vapour transmission through porous membranes

2021 ◽  
pp. 152808372110142
Author(s):  
Ariana Khakpour ◽  
Michael Gibbons ◽  
Sanjeev Chandra
Keyword(s):  
Water Vapour ◽  
Moisture Diffusion ◽  
Porous Membrane ◽  
Water Evaporation ◽  
Porous Membranes ◽  
Water Vapour Concentration ◽  
Vapour Concentration ◽  
Vapour Diffusion ◽  
Pore Blockage ◽  
The Impact

Porous membranes find natural application in various fields and industries. Water condensation on membranes can block pores, reduce vapour transmissibility, and diminish the porous membranes' performance. This research investigates the rate of water vapour transmission through microporous nylon and nanofibrous Gore-Tex membranes. Testing consisted of placing the membrane at the intersection of two chambers with varied initial humidity conditions. One compartment is initially set to a high ([Formula: see text]water vapour concentration and the other low ([Formula: see text], with changes in humidity recorded as a function of time. The impact of pore blockage was explored by pre-wetting the membranes with water or interposing glycerine onto the membrane pores before testing. Pore blockage was measured using image analysis for the nylon membrane. The mass flow rate of water vapour ( ṁv) diffusing through a porous membrane is proportional to both its area (A) and the difference in vapour concentration across its two faces ([Formula: see text], such that [Formula: see text] where K is defined as the moisture diffusion coefficient. Correlations are presented for the variation of K as a function of [Formula: see text]. Liquid contamination on the porous membrane has been shown to reduce the moisture diffusion rate through the membrane due to pore blockage and the subsequent reduced open area available for vapour diffusion. Water evaporation from the membrane's surface was observed to add to the mass of vapour diffusing through the membrane. A model was developed to predict the effect of membrane wetting on vapour diffusion and showed good agreement with experimental data.

Charged microgels adsorbed on porous membranes - A study of their mobility and molecular retention

2019 ◽  
Vol 588 ◽  
pp. 117190 ◽  
Author(s):  
Monika Wiese ◽  
Theresa Lohaus ◽  
Jan Haussmann ◽  
Matthias Wessling
Keyword(s):  
Porous Membranes

Design of Porous Membranes by Liquid Gating Technology

2021 ◽  
Author(s):  
Shuli Wang ◽  
Yunmao Zhang ◽  
Yuhang Han ◽  
Yaqi Hou ◽  
Yi Fan ◽  
...  
Keyword(s):  
Porous Membranes

Biofouling-Resistant Porous Membranes with a Precisely Adjustable Pore Diameter via 3D Polymer Grafting

2019 ◽  
Vol 11 (20) ◽  
pp. 18268-18275
Author(s):  
Hidenori Kuroki ◽  
Alexey Gruzd ◽  
Igor Tokarev ◽  
Taras Patsahan ◽  
Jaroslav Ilnytskyi ◽  
...  
Keyword(s):  
Pore Diameter ◽  
Porous Membranes ◽  
Polymer Grafting

Morphological control of porous membranes based on aromatic polyether/water soluble polymers

2016 ◽  
Vol 134 (9) ◽  
Author(s):  
Denise Karamessini ◽  
Georgia Ch. Lainioti ◽  
Valadoula Deimede ◽  
Joannis K. Kallitsis
Keyword(s):  
Water Soluble ◽  
Porous Membranes ◽  
Morphological Control ◽  
Water Soluble Polymers ◽  
Soluble Polymers
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