GAO Yuhua, LIU Zhenfa, GUO Ruhui, et al. Synthesis of polyaspartic acid derivative and its characteristics in scale inhibition[J]. CIESC Journal, 2009, (8): 2107-2111.
GAO Yuhua, LIU Zhenfa, GUO Ruhui, et al. Synthesis of polyaspartic acid derivative and its characteristics in scale inhibition[J]. CIESC Journal, 2009, (8): 2107-2111.DOI:
Polyaspartic acid derivative was prepared from aspartic acid(ASP)and polysuccinimide(PSI)that was the thermal condensation polymer of ASP.Its grafting ratio was examined by measuring the residual ASP.Effect of the mole ratio of PSI to ASP on grafting ratio and the scale inhibition properties of PASP-ASP were studied.The product structure was characterized by using FTIR.Calcium carbonate crystals in the scale samples were observed with SEM.The highest grafting ratio of PASP-ASP up to 66.45% was achieved when the mole ratio of PSI to ASP was 1∶1.8.Under the concentrations of Ca2+ with 400 mg8226;L-1,HCO-3 with 800 mg8226;L-1 and PASP-ASP with 6 mg8226;L-1,the scale inhibition efficiency of PASP-ASP was up to 100%.Polyaspartic acid derivative could make the calcium carbonate crystallite more distortive and more dispersive.