改性聚天冬氨酸阻垢剂的合成及其阻垢性能研究  

Synthesis of Modified Polyaspartic Acid Scale Inhibitor and Its Scale Inhibition Performance

作　　者：关俊霞[1] 柳鑫华 舒适立 张青[1] 王磊[1] 李繁麟 付占达 邓杰 GUAN Jun-xia;LIU Xin-hua;SHU Shi-li;ZHANG Qing;WANG Lei;LI Fan-lin;FU Zhan-da;DENG Jie(Department of Chemistry,Tangshan Normal University,Tangshan 063000,China)

机构地区：[1]唐山师范学院化学系,河北唐山063000

出　　处：《材料保护》2023年第1期35-43,共9页Materials Protection

基　　金：河北省自然科学基金(D2022105004);唐山师范学院基金项目(2022C42);唐山师范学院重点培育项目(ZDPY07,ZDPY05)资助。

摘　　要：为了拓展绿色阻垢剂聚天冬氨酸(PASP)的使用范围,以聚琥珀酰亚胺(PSI)为原料,蛋氨酸(Met)为改性试剂,制备新型绿色改性聚天冬氨酸阻垢剂(MPASP)。用红外光谱和核磁氢谱对制备的MPASP进行了结构分析;用热重分析法对MPASP进行了热稳定性分析;采用静态阻垢法探讨了MPASP对CaCO_(3)和CaSO_(4)垢的阻垢性能;用扫描电镜和红外光谱表征了MPASP阻CaCO_(3)和CaSO_(4)垢样的晶体形态。结果表明:MPASP的最佳合成条件为:反应物配比m((PSI))∶m((Met))=1.00∶0.10,反应溶液pH值为10,反应温度和反应时间分别为70℃和2 h。当MPASP的用量为8 mg/L时,对CaCO_(3)和CaSO_(4)的阻垢率分别为94.40%、95.49%,并且MPASP对CaCO_(3)和CaSO_(4)垢的阻垢作用优于PASP。添加MPASP后,使溶液中CaCO_(3)和CaSO_(4)钙垢晶体结构发生较大改变,钙垢结晶变得松散细小,干扰了致密钙垢的形成过程,达到了良好的阻垢效果。In order to expand the application range of green scale inhibitor polyaspartic acid(PASP),a new green modified polyaspartic acid scale inhibitor(MPASP)was prepared using polysuccinimide(PSI)as the raw material and methionine(Met)as the modification reagent.The microstructure of the prepared MPASP was analyzed by infrared spectrum and hydrogen nuclear magnetic spectrum.The thermal stability of the MPASP was analyzed by thermogravimetric analysis.The scale inhibition performance of MPASP on CaCO_(3)and CaSO_(4)scale was explored by static scale inhibition method.And the crystal morphology of CaCO_(3)and CaSO_(4)scale samples inhibited by MPASP was characterized by scanning electron microscope and infrared spectrum.Results showed that the optimum conditions for the synthesis of MPASP were as follows:the reactant ratio m(PSI):m(Met)=1.00:0.10,the pH value of reaction solution was 10,and the reaction temperature and time were respectively 70℃and 2 h.When the dosage of MPASP was 8 mg/L,the scale inhibition rates on CaCO_(3)and CaSO_(4)were 94.40%and 95.49%respectively.In addition,the scale inhibition effect of MPASP on CaCO_(3)and CaSO_(4)scales was better than that of PASP.Generally,the addition of MPASP caused significant change in the crystal structure of CaCO_(3)and CaSO_(4)calcium scales in the solution,and the crystallization of calcium scale became loose and fine,which interfered with the formation process of dense calcium scale and achieved good scale inhibition effect.

关 键 词：改性聚天冬氨酸 绿色阻垢剂 阻垢效率 阻垢机理 

分 类 号：TQ085.412[化学工程]