Page 138 - 《精细化工》2020年第8期

第 37 卷第 8 期 精 细 化 工 Vol.37, No.8
202 0 年 8 月 FINE CHEMICALS Aug. 2020

表面活性剂
硅疏水改性聚胺阻垢剂的制备及其性能

孙千惠 1,2 ，沈一丁 1,2

（1. 陕西科技大学 化学与化工学院，陕西 西安 710021；2. 教育部轻化工助剂化学与技术重点实验室，
陕西 西安 710021）

摘要：用 γ-缩水甘油醚氧丙基三甲氧基硅烷（KH560）、1-氯辛烷对低相对分子质量聚乙烯亚胺（PEI）进行疏
水接枝改性，得到了含硅疏水改性聚胺阻垢剂。通过 FTIR、TG、粒径分析、Zeta 电位测试等分析改性后聚胺
阻垢剂的结构与性能。结果表明，改性后产物热稳定性提高、黏度增大、表面张力降低、溶液粒径增大。将改
性聚胺阻垢剂用于分散铝硅酸钠颗粒，对处理前后的颗粒进行红外光谱表征，并通过对悬浮分散液进行稳定性、
颗粒沉降等测试，评价聚胺阻垢剂的阻垢分散性能并初步讨论其分散机理。当 m（PEI, M w =10000）∶m（KH560）∶
m（1-氯辛烷）=10∶2∶0.5，反应时间 6 h，反应温度 75 ℃时，合成的阻垢剂分散性能最佳。当结疤的质量浓
度为 30 g/L 时，悬浮液颗粒沉降速度达到最低值 0.047 cm/d，沉降速率减小程度达到 94.8%，分散性显著提高。
经过改性后的 PEI 在氧化铝工业生产中具有高效的阻垢作用，可通过在工厂进行条件优化，进一步替代传统的
强酸型阻垢剂，减小管道腐蚀程度，降低能耗。
关键词：聚乙烯亚胺；疏水接枝；改性；铝硅酸钠；阻垢分散性能；机理；表面活性剂
中图分类号：TQ085.4;O633.21 文献标识码：A 文章编号：1003-5214 (2020) 08-1636-09

Preparation and properties of silicon hydrophobic modified
polyamine scale inhibitor

1,2
1,2
SUN Qianhui , SHEN Yiding
（1. College of Chemistry and Chemical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, Shaanxi,
China; 2. Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, Shaanxi
University of Science & Technology, Xi’an 710021, Shaanxi, China）

Abstract: Silicon hydrophobic modified polyamine as a scale inhibitor was synthesized by grafting reaction
from low molecular weight polyethylenimine (PEI) with γ-glycidyloxypropyltrimethoxysilane (KH560) and
1-chlorooctane. The structure and properties of the modified polyamine scale inhibitor were analyzed by
FTIR. The results showed that the thermal stability, viscosity, surface tension and solution particle size of
the product were improved after modification. The modified polyamine scale inhibitor was used to disperse
sodium aluminosilicate particles, the particles before and after treatment were characterized by FTIR, and
the dispersion performance of polyamine scale inhibitor was evaluated and its dispersion mechanism was
preliminarily discussed by testing the stability and particle settling of the suspended dispersion solution.
Under the conditions of m(PEI, M w=10000)∶m(KH560)∶m(1-chlorooctane)=10∶2∶0.5, reaction time
6 h, and reaction temperature 75 ℃, the synthesized scale inhibitor displayed the best dispersion
performance. When the mass concentration of scarring particles was 30 g/L, the particle setting velocity of
suspension reached the lowest value of 0.047 cm/d, the decrease degree of particle setting velocity was
94.8%, and the dispersion performance significantly improved. The modified polyethylenimine has a highly
effective scale inhibition effect in industrial production of alumina. It can further replace the traditional
strong acid scale inhibitor by optimizing the conditions in the factory, so as to reduce the corrosion degree
of the pipeline and reduce the energy consumption.
Key words: polyethylenimine; hydrophobic grafting; modification; sodium aluminosilicate; scale inhibition
and dispersion performance; mechanism; surfactants

收稿日期：2020-03-18; 定用日期：2020-05-11; DOI: 10.13550/j.jxhg.20200216
作者简介：孙千惠（1996—），女，硕士生，E-mail：1808018@sust.edu.cn。