A complex based on imidazole ionic liquid and copolymer of acrylamide and phenoxyacetamide modification for clay stabilizer

Abstract

ABSTRACT A complex system (AM/AA/APO‐EMIN) was obtained by poly (acrylamide‐ co ‐acrylic acid‐ co‐N ‐allyl‐2‐phenoxyacetamide) (AM/AA/APO) combining 1‐ethyl‐3‐methyl imidazolium tetrafluoroborate ([EMIM] [BF 4 ]) for clay stabilizer by using acrylamide (AM), acrylic acid (AA) and N ‐allyl‐2‐phenoxyacetamide (APO), N ‐methylimidazole, bromoethane, and sodium fluoroborate as raw materials. The complex solution exhibited excellent anti‐swelling rate (up to 94.5% at 10,000 mg/L), satisfying aging resistance (viscosity retention rate 84.2% after 15 days), and marked shear thinning behavior (viscosity retention rate 7.5% under 600 s −1 ). From scanning electron microscope (SEM) images, a clear network structure appeared in AM/AA/APO‐EMIM solution. Compared with an existing poly (acrylamide‐ co ‐diallyl dimethyl ammonium chloride) clay stabilizer (HY‐201S), AM/AA/APO‐EMIN was less content and more effective to reduce the d ‐spacing of sodium montmorillonite (Na‐MMT) from 19.1 Å to 15.7 Å. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41536.