改性聚天冬氨酸阻垢剂的合成及其阻垢性能研究

关俊霞, 柳鑫华, 舒适立, 张 青, 王 磊, 李繁麟, 付占达, 邓 杰

doi:10.16577/j.issn.1001-1560.2023.0006

材料保护 >

2023 , Vol. 56 >Issue 1: 35 - 43

DOI: https://doi.org/10.16577/j.issn.1001-1560.2023.0006

试验研究

改性聚天冬氨酸阻垢剂的合成及其阻垢性能研究

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唐山师范学院化学系，河北唐山 063000

柳鑫华(1971-)，博士，教授，主要研究方向为绿色水处理剂，电话:18633168357，E-mail:hualiyiwang＠163.com

收稿日期: 2022-07-24

修回日期: 2022-08-20

录用日期: 2022-09-15

网络出版日期: 2023-07-25

基金资助

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；

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

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Department of Chemistry， Tangshan Normal University， Tangshan 063000， China

Received date: 2022-07-24

Revised date: 2022-08-20

Accepted date: 2022-09-15

Online published: 2023-07-25

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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CaCO3和CaSO4垢的阻垢性能；用扫描电镜和红外光谱表征了MPASP 阻CaCO3和CaSO4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CaCO3和CaSO4的阻垢率分别为94.40%、95.49%，并且MPASP 对CaCO3和CaSO4垢的阻垢作用优于PASP。添加MPASP 后，使溶液中CaCO3和CaSO4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。

关键词： 改性聚天冬氨酸; 绿色阻垢剂; 阻垢效率; 阻垢机理

本文引用格式

关俊霞, 柳鑫华, 舒适立, 张青, 王磊, 李繁麟, 付占达, 邓杰 . 改性聚天冬氨酸阻垢剂的合成及其阻垢性能研究[J]. 材料保护, 2023 , 56(1) : 35 -43 . DOI: 10.16577/j.issn.1001-1560.2023.0006

Abstract

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 CaCO3 and CaSO4 scale was explored by static scale inhibition method. And the crystal morphology of CaCO3 and CaSO4 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 CaCO3 and CaSO4 were 94.40%and 95.49%respectively. In addition， the scale inhibition effect of MPASP on CaCO3 and CaSO4 scales was better than that of PASP. Generally， the addition of MPASP caused significant change in the crystal structure of CaCO3 and CaSO4 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.

Key words： modified polyaspartic acid; green scale inhibitor; scale inhibition efficiency; scale inhibition mechanism

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