Scale Inhibition by a Carboxylate-Terminated Double-Hydrophilic Block Copolymer in Industrial Recycling Water~1

摘要

Acrylic acid (AA)-allylpolyethoxy carboxylate (APEL) copolymer was synthesized. The performance of AA-APEL on inhibition of Ca-3(PO4)(2), CaCO3 and CaSO4 precipitation was compared with that of current commercial inhibitors. It was shown that AA-APEL exhibited excellent ability to control inorganic minerals, with approximately 95.6% CaSO4 inhibition and 99.8% Ca-3(PO4)(2) inhibition at levels of 3 and 6 mg/L, respectively. AA-APEL also displayed ability to prevent the formation of CaCO3 scales. Surface morphology characterization of Ca-3(PO4)(2), CaCO3 and CaSO4 was investigated with scanning electronic microscopy. The inhibition mechanism was proposed that the formation of the excellent solubility of AA-APEL-Ca complexes due to high hydrophilic PEG segments in the AA-APEL matrix.