TY - JOUR
T1 - Latex composite membranes
T2 - Structure and properties of the discriminating layer
AU - Ramakrishnan, Subramanian
AU - McDonald, C. J.
AU - Prud'homme, R. K.
AU - Carbeck, J. D.
N1 - Funding Information:
The authors would like to acknowledge the support of The Dow Chemical Company and the Department of Chemical Engineering at Princeton University for providing the resources for this study.
PY - 2004/3/1
Y1 - 2004/3/1
N2 - We have examined the properties of a new class of microfiltration and ultrafiltration membranes that are fabricated by assembling particles onto the surface of a microporous substrate and stabilizing the porous array into a composite. The particle array contains interstitial voids having a narrow size distribution that serve as channels for size sieving. This aqueous based technology has advantages relative to other membrane fabrication methods in terms of the control of asymmetry, the facile adjustment of pore size, and the ability to easily modify pore surfaces during the synthesis of particles. In this work we study the properties of the membranes (gas and water permeabilities) fabricated from different size particles and of varying thickness on a number of different supports. The experimental data is then analyzed with a standard model, Carman-Kozeny, to develop guidelines for the design of such membranes. For all of the composites, the volume porosity was found to be approximately 0.3, close to what would be expected for hexagonal closest packed array which corresponds to the visual appearance from electron micrographs. In this study, membranes with narrow pore size distributions from 0.038 to 0.122μm were fabricated with fluxes three to four times higher than the commercial membranes of similar pore size manufactured by phase inversion processes.
AB - We have examined the properties of a new class of microfiltration and ultrafiltration membranes that are fabricated by assembling particles onto the surface of a microporous substrate and stabilizing the porous array into a composite. The particle array contains interstitial voids having a narrow size distribution that serve as channels for size sieving. This aqueous based technology has advantages relative to other membrane fabrication methods in terms of the control of asymmetry, the facile adjustment of pore size, and the ability to easily modify pore surfaces during the synthesis of particles. In this work we study the properties of the membranes (gas and water permeabilities) fabricated from different size particles and of varying thickness on a number of different supports. The experimental data is then analyzed with a standard model, Carman-Kozeny, to develop guidelines for the design of such membranes. For all of the composites, the volume porosity was found to be approximately 0.3, close to what would be expected for hexagonal closest packed array which corresponds to the visual appearance from electron micrographs. In this study, membranes with narrow pore size distributions from 0.038 to 0.122μm were fabricated with fluxes three to four times higher than the commercial membranes of similar pore size manufactured by phase inversion processes.
KW - Carman Kozeny Model
KW - Composite membranes
KW - Microfiltration
KW - Polymer colloids
KW - Ultrafiltration
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U2 - 10.1016/j.memsci.2003.10.036
DO - 10.1016/j.memsci.2003.10.036
M3 - Article
AN - SCOPUS:1242321340
SN - 0376-7388
VL - 231
SP - 57
EP - 70
JO - Journal of Membrane Science
JF - Journal of Membrane Science
IS - 1-2
ER -