2017 Volume 50 Issue 11 Pages 815-820
The present study investigates deformable spherical gel particles that were packed in a column to separate silica particles. Spherical dimethylacrylamide gel particles with a mean diameter of 40 µm were polymerized in a water-in-oil suspension. The pressure loss during water permeation at varying flow rates of 10–50 mL h−1 through the gel-packed column at various heights was determined. The pressure loss increased exponentially with an increase in permeation time. This exponential increment is attributed to a deformation of the gel particles. Suspensions that contain silica particles with diameters of 0.12, 1.0, or 10 µm flowed, which indicates that larger silica particles were trapped within gaps of the packed gel at the top of the column; whereas, smaller particles were trapped within gaps of the deformed gel at the bottom of the column. The deformation pitch of gel particles that were packed in a column had a distribution in the flow direction to achieve particle separation at each position in a flowing silica-particle suspension.