Particle Adhesion on Gelatin-Coated Glass Surfaces

Surfactant-induced detachment of monodispersed hematite particles adhered on glass

“…1a, is identical to the one reported before for the same system [17,40], which confirms the reproducibility of the dispersion preparation and the method. At pH 4.0 particles and collectors bear charges of opposite sign resulting in a strong electrostatic attraction.…”

“…The results are compared with the previously reported data on the same system, but using only solutions of NaOH [17,29,30]. …”

“…The removal of adhered particles can then be followed by rinsing the loaded column with solutions of desired compositions. The method has been successfully applied to a variety of systems with different collector materials (steel, glass, or coated glass) and with a number of monodispersed colloids [16][17][18][19][20][21][22].…”

Electroosmosis in Packed Beds

“…Ref. 6). These the slope of this plot equals (dJ/dI) 01 ideal 1 (8Jhl c /pDp p ), one can also beads were sufficiently large to settle rapidly when dispersed in a solution.…”

Preparation of Iron Particles Coated with Silica

“…The appearance of an O 1s peak at the BE of 529.7 eV also indicates that there must be some oxide present at or near the surface of the particles because the photoelectrons that generate the spectrum originate from a depth of only 2-5 nm in the particles. It is known that hematite will strongly bind to silica in the presence of a variety of proteins (9) and the surfaces of iron particles used in the experiments may resemble that of hematite, so we turned to gelatin as a potential binding agent for this particular set of surfaces. Sample 3 was obtained by pretreating first the iron particles with gelatin according to procedure 2(i) and then subsequently coating them in the same way as for samples 1 and 2.…”