Study on the Effect of Polymer Architecture in Inhibiting Calcium Oxalate Precipitation

摘要

In this study,the effect of polymer architecture(i.e.,composition,functional group,monomer type,etc.)on calcium oxalate(CaOx)precipitation in aqueous solution was investigated using the spontaneous precipitation method.The polymers tested include: natural,bio-,and synthetic homo- and copolymers.The experimental results show that performance of polymers as CaOx inhibitors strongly depends on polymer architecture and type and charge of comonomers.In general,polymers containing carboxyl group perform better than co- and terpolymers containing hydrophobic and bulky comonomers.Analysis of XRD,FT-IR,and SEM data on the crystals grown in the absence of polymer reveal the formation of COM(calcium oxalate monohydrate)as the predominant phase.Results also indicate that presence of polymers in CaOx supersaturated solution favor the formation of COD(calcium oxalate dihydrate)phase.