01391nab a2200181 4500 20260520001748.0 260224s2009 xxu Preliminary study on mechanisms and oil displacement performance of cationic starch abril. 2009 2009-05-11 ; 2009-05-11 5 p. ; 188-192 Resumen publicado por el autor: In this paper, the oil displacement performance of cationic starch was investigated. The results show that cationic starch has good efficiency of oil displacement. Using microscopic electrophoresis apparatus, the effect of cationic starch on zeta potential of crude oil emulsion at different pH values and electrolytical concentrations was studied. The results show that cationic starch can reduce negative charges of oil droplets surface and make the charges reversed. This action will be restrained when acidity or electrolytical concentration increases. Ordinary starch has inefficacy of oil displacement and shows no effect on zeta potential of the oil–water emulsion. The oil displacement mechanism of cationic starch was studied preliminarily from the interactions existing between cationic starch and crude oil 3-4 Journal of Petroleum Science & Engineering 65 ARTICULO Haicun, Yang 41125 169727 169727 0 0 0 0 237546 BAAB BAAB 2026-03-05 200044535 0 200044535 2026-03-05 15:11:57 2026-03-05 ARTICULO