聚天冬氨酸/氨基乙醛缩二乙醇的合成及其阻垢分散性能  

Synthesis of Polyaspartic Acid/Aminoacetaldehyde Diethyl Acetal and Evaluation of Its Scale Inhibitor and Dispersing Performance

作　　者：蔡永红[1] 张盼盼 吴玉锋[1] 王谦[1] 许英[1] CAI Yonghong;ZHANG Panpan;WU Yufeng;WANG Qian;XU Ying(College of Chemistry and Chemical Engineering,Henan University,Henan Kaifeng 475004,China)

机构地区：[1]河南大学化学化工学院,河南开封475004

出　　处：《河南大学学报（自然科学版）》2019年第1期78-87,共10页Journal of Henan University:Natural Science

基　　金：河南省科技发展计划资助项目(162300410005)

摘　　要：以马来酸酐、尿素、氨基乙醛缩二乙醇(AED)为原料,制备了聚天冬氨酸/氨基乙醛缩二乙醇(PASP/AED)接枝共聚物,并通过~1H NMR表征了其结构,采用静态阻垢法对其综合阻垢性能予以考察.结果表明接枝物对高硬度、高磷和高温水体系的适应性较PASP有较大提高,当接枝物浓度为0.75、4和8mg/L时,其对应的阻CaCO_3、CaSO_4和Ca_3(PO_4)_2垢率均高达100%.SEM和XRD分析表明接枝物的应用可使钙垢晶体发生畸变,破坏垢晶体正常生长.同时接枝物对氧化铁也有较好的分散能力,当接枝物浓度为50mg/L时,溶液的透光率可降低至61%左右.Polyaspartic acid/aminoacetaldehyde diethyl acetal(PASP/AED)copolymer was prepared by the reaction of maleic anhydride,urea and AED.The structure of PASP/AED was characterized by 1 H NMR,and the static scale inhibition method was used to investigate its scale inhibition performance.The simulation experimental results indicate that the adaptability of the grafts to high hardness,high phosphorus and high temperature water systems is greater than that of PASP.Scale inhibition efficiency of PASP/AED is close to 100% against CaCO3,CaSO4 and Ca3(PO4)2 at dosages of 0.75,4and 8mg/L,respectively.SEM and XRD analysis shows that the grafts can distort calcium scale crystals,and destroy the normal growth of scale crystals.The grafts have also good dispersion ability to ferric oxide,and the best transmittance for ferric oxide is 61% when PASP/AED concentration is 50mg/L.

关 键 词：聚天冬氨酸 氨基乙醛缩二乙醇 阻垢 分散氧化铁 

分 类 号：O631.4[理学—高分子化学]