Preparation and Application of Malic-Acid Hyperbranched Copolymer for Scale Inhibition

doi:10.19491/j.issn.1001-9278.2019.04.006

Abstract

Abstract: The malic-acid hyperbranched copolymer (HBP) was successfully prepared by melt polymerization using trimethylolpropane as a core and malic acid as an AB2 monomer, and its structure was characterized by FT-IR and GPC. Then, HBP was applied for the scale inhibition of circulating water. The effects of HBP dosage and system temperature on the inhibition efficiency of CaSO4 scale were studied. The results indicated that HBP exhibited excellent dispersibility and scale inhibition performance for CaSO4, and it achieved a scale inhibition rate of 95.2% for CaSO4 at an HBP concentration of 12 mg/L. Moreover, HBP also showed excellent inhibition efficiency when used in a wide temperature range. XRD analysis demonstrated that HBP could inhibit the growth of calcium scale crystals and reduce its crystallinity, thus inhibiting the scaling capability.

References

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