无磷型绿色端羧基超支化聚酯的制备及其阻垢行为研究  

Construction and Scale Inhibition Behavior of Phosphorus⁃free Green Carboxyl⁃terminated Hyperbranched Polyester

作　　者：李美兰 何娇[1] 龚伟 贺肖妮 来倩[1] 刘白玲 LI Meilan;HE Jiao;GONG Wei;HE Xiaoni;LAI Qian;LIU Bailing(Key Laboratory of Comprehensive Utilization of Tailings Resources in Shaanxi Province,Shangluo University,Shangluo 726000,China;Chengdu Institute of Organic Chemistry,Chinese Academy of Sciences,Chengdu 610041,China)

机构地区：[1]商洛学院/陕西省尾矿资源综合利用重点实验室,陕西商洛726000 [2]中国科学院成都有机化学研究所,成都610041

出　　处：《中国塑料》2021年第11期55-63,共9页China Plastics

基　　金：陕西省大学生创新创业计划训练项目(S202011396085);陕西省科技厅自然科学项目(2019JQ⁃907);商洛学院自然科学项目(16SKY022、16SKY026)。

摘　　要：采用酯化反应,以衣康酸、三乙醇胺及琥珀酸为反应单体,构建出了一种可用于工业循环用水阻垢分散的无磷型绿色端羧基超支化聚酯,通过静态阻垢实验探讨了无磷型绿色端羧基超支化聚酯在不同影响因素下的阻垢分散能力,同时测定了该阻垢剂的生物降解性能及对水体的生态效应。结果表明,无磷型绿色端羧基超支化聚酯对氧化铁具有优异的分散效果,并且在较高温度及较宽pH范围内对CaCO_(3)和CaSO_(4)均具有良好的阻垢分散性能,当阻垢剂用量为20 mg·L^(-1)和12 mg·L^(-1)时,其对CaCO_(3)和CaSO_(4)的阻垢率分别达到了93.8%和96.2%;无磷型绿色端羧基超支化聚酯用于钙垢阻垢时,不仅能破坏钙垢晶体的规整性,而且还能降低钙垢的结晶度,从而有效抑制钙垢的生长,实现阻垢分散的目的;该阻垢剂具有良好的生物降解性,在第28 d时,其生物降解率可达67.2%,且基本不影响水体中微生物的生长。Carboxyl terminated hyperbranched polyester as a phosphorus⁃free green scale inhibitor was successfully pre⁃pared through esterification with itaconic acid,triethanolamine and succinic acid as reaction monomers,and its scale inhi⁃bition and dispersion ability under different influence factors was studied by a static scale inhibition experiment.The bio⁃degradability and ecological effects of the scale inhibitor were also determined.The results indicated that the scale inhibi⁃tor not only had good dispersibility for Fe2O_(3) but also had good scale inhibiting effect for CaCO_(3) and CaSO_(4) under wide temperature and pH ranges.When the dosage of scale inhibitor was 20 and 12 mg/L,the scale inhibition efficiency for CaCO_(3) and CaSO_(4) reached 93.8%and 96.2%,respectively.The XRD and SEM analysis showed that the scale inhibi⁃tor not only effectively destroyed the regularity of calcium scale crystal but also reduced the crystallinity of calcium scale.This can effectively inhibit the growth of calcium scale,achieving the purpose of scale inhibition and dispersion.In addi⁃tion,the scale inhibitor had excellent biodegradability with a biodegradation rate of 67.2%after 28 days.Moreover,the scale inhibitor does not affect the growth of microorganisms of water.

关 键 词：衣康酸 工业循环水 端羧基超支化 生物降解性 阻垢分散剂 

分 类 号：TQ325[化学工程—合成树脂塑料工业]