分散剂对柠檬酸镁溶胶性能的影响

doi:10.3969/j.issn.1001-1935.2026.03.004

耐火材料 ›› 2026, Vol. 60 ›› Issue (3): 205-209.DOI: 10.3969/j.issn.1001-1935.2026.03.004

分散剂对柠檬酸镁溶胶性能的影响

隋吉鹏¹⁾, 司超伟²⁾, 游杰刚¹⁾, 郭晋达¹⁾, 冯东¹⁾, 张小芳¹⁾, 侯庆冬¹⁾

1)辽宁科技大学材料与冶金学院辽宁鞍山 114051;
2)山东耐材集团鲁耐窑业有限公司山东淄博 255200

收稿日期:2025-07-23 出版日期:2026-06-15 发布日期:2026-06-23
通讯作者: 游杰刚,男,1975年生,博士,教授。E-mail:youjiegang@163.cm
作者简介:隋吉鹏:男,2000年生,硕士研究生。E-mail:suijipeng001005@163.com
基金资助:
辽宁省教育厅基础科研项目(LJ232510146002)。

Effect of different dispersants on the properties of magnesium citrate sol

Sui Jipeng, Si Chaowei, You Jiegang, Guo Jinda, Feng Dong, Zhang Xiaofang, Hou Qingdong

First author’s address:School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, Liaoning, China

Received:2025-07-23 Online:2026-06-15 Published:2026-06-23

摘要/Abstract

摘要： 胶体的团聚是制约溶胶结合剂在耐火材料应用的重要因素,以无水柠檬酸镁和轻烧氧化镁粉为原料,聚乙二醇(PEG)、三聚磷酸钠(STP)和十二烷基苯磺酸钠(SDBS)为分散剂,制备了柠檬酸镁(MC)溶胶,研究了柠檬酸溶液浓度(0.2、0.3、0.4、0.5、0.6、0.7和0.8 mol·L^-1)和分散剂种类及其加入量(溶胶质量的0、0.05%、0.1%、0.2%、0.3%和0.4%)对柠檬酸镁溶胶稳定性的影响。结果表明:随着柠檬酸溶液浓度的增大,Zeta电位绝对值逐渐减小,而电导率、黏度和MgO的固相质量分数逐渐增大,溶胶的稳定性呈递减趋势,采用0.7 mol·L^-1柠檬酸溶液制备的溶胶在稳定性和黏度方面均优于其他试样的;3种分散剂的分散效果从高到低顺序依次为:SDBS>STP>PEG,且SDBS使柠檬酸镁溶胶胶体的粒径减小,同时Zeta电位绝对值增大,显著提高胶体的稳定性;PEG、STP和SDBS最佳加入量(w)分别为0.2%、0.1%和0.05%。

关键词: 柠檬酸镁溶胶, 轻烧氧化镁, 分散剂, 稳定性

Abstract: Colloid agglomeration is an important factor restricting the application of sol binder in refractory materials.In this paper,magnesium citrate (MC) sol was prepared by using anhydrous magnesium citrate and light burned magnesium oxide powder as raw materials,polyethylene glycol (PEG),sodium tripolyphosphate (STP) and sodium dodecyl benzene sulfonate (SDBS) as dispersants.The effects of citric acid solution concentration (0.2-0.8 mol·L^-1) and dispersant and its addition amount (0-0.4%,weight percentage) on the stability of magnesium citrate sol were studied.The results showed that with the increase of the concentration of citric acid solution,the Zeta potential value decreased gradually,while the conductivity,viscosity and solid mass fraction of MgO increased gradually,and the stability of the sol showed a decreasing trend.The sol prepared by 0.7 mol·L^-1 citric acid solution was superior to other samples in terms of stability and viscosity.The order of the dispersion effect of the three dispersants from high to low is :SDBS > STP > PEG,and SDBS reduces the particle size of the magnesium citrate sol,and the absolute value of the Zeta potential increases,which significantly improves the stability of the colloid.The optimal addition amounts of PEG,STP,and SDBS are respectively 0.2%,0.1%,and 0.05%.

Key words: magnesium citrate sol, light-burned magnesium oxide powder, dispersant, stability

中图分类号:

TQ175

隋吉鹏, 司超伟, 游杰刚, 郭晋达, 冯东, 张小芳, 侯庆冬. 分散剂对柠檬酸镁溶胶性能的影响[J]. 耐火材料, 2026, 60(3): 205-209.

Sui Jipeng, Si Chaowei, You Jiegang, Guo Jinda, Feng Dong, Zhang Xiaofang, Hou Qingdong. Effect of different dispersants on the properties of magnesium citrate sol[J]. Refractories, 2026, 60(3): 205-209.

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分散剂对柠檬酸镁溶胶性能的影响

Effect of different dispersants on the properties of magnesium citrate sol

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