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Article

Filtration of Elastic Polymers and Spherical Gels through a Silica-Deposited Layer on a Porous Membrane

1
Department of Applied Chemistry, Saga University, Saga 840-8502, Japan
2
Saga Ceramics Research Laboratory, Saga 844-0022, Japan
*
Author to whom correspondence should be addressed.
Membranes 2021, 11(1), 22; https://doi.org/10.3390/membranes11010022
Received: 2 December 2020 / Revised: 19 December 2020 / Accepted: 22 December 2020 / Published: 28 December 2020
(This article belongs to the Special Issue Membranes for Particle Separation)
A 120-nm silica suspension was permeated through a porous polyethylene (PE) hollow-fiber membrane, as was a solution of deformable elastic particles of poly(N-isopropylacrylamide) (PNIPAM) gel and dextran. The amount adsorbed and flux of permeation were analyzed with ordinary differential equations to obtain adsorption coefficients, maximum amounts adsorbed, and pore-narrowing factors. The thickness of the “silica-deposited layer” on the membrane was 1 μm. In a batch adsorption mode, 5.0 mg of PNIPAM gel and 30 mg of dextran were adsorbed on the PE membrane, with no adsorption on the silica. The PE membrane pores were narrowed by a secondary layer of adsorbed PNIPAM gel. When filtered through the silica-deposited layer, PNIPAM gel occupies gaps, resulting in a reduced permeation flux. Dextran passed through the silica-deposited layer and was partially adsorbed on the PE membrane. The modified membrane can control adsorption, filtration, and flux permeation, which leads to dynamic membrane separations. View Full-Text
Keywords: filtration and adsorption; colloidal particle; elasticity; porous membrane; mathematical model filtration and adsorption; colloidal particle; elasticity; porous membrane; mathematical model
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MDPI and ACS Style

Hidane, T.; Kitani, H.; Morisada, S.; Ohto, K.; Kawakita, H.; Furuta, S. Filtration of Elastic Polymers and Spherical Gels through a Silica-Deposited Layer on a Porous Membrane. Membranes 2021, 11, 22. https://doi.org/10.3390/membranes11010022

AMA Style

Hidane T, Kitani H, Morisada S, Ohto K, Kawakita H, Furuta S. Filtration of Elastic Polymers and Spherical Gels through a Silica-Deposited Layer on a Porous Membrane. Membranes. 2021; 11(1):22. https://doi.org/10.3390/membranes11010022

Chicago/Turabian Style

Hidane, Takanori, Hidemi Kitani, Shintaro Morisada, Keisuke Ohto, Hidetaka Kawakita, and Sachiko Furuta. 2021. "Filtration of Elastic Polymers and Spherical Gels through a Silica-Deposited Layer on a Porous Membrane" Membranes 11, no. 1: 22. https://doi.org/10.3390/membranes11010022

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