高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (3): 435.

• 研究论文 • 上一篇    下一篇

高价小分子型分散剂在Al2O3表面的吸附研究

刘阳桥, 高濂, 郭景坤   

  1. 中国科学院上海硅酸盐研究所, 高性能陶瓷与超微结构国家重点实验室, 上海 200050
  • 收稿日期:2000-03-27 出版日期:2001-03-24 发布日期:2001-03-24
  • 通讯作者: 高　濂(1945年生),男,博士,研究员,从事纳米材料和高温结构陶瓷研究.E-mail:liangaoc@online.sh.cn E-mail:liangaoc@online.sh.cn
  • 基金资助:

    国家重点基础研究发展规划项目(批准号:G1999064506)资助

Investigation on the Adsorption of Polyvalent Low-molecular-weight Dispersants on Alumina

LIU Yang-Qiao, GAO Lian, GUO Jing-Kun   

  1. The State Key Laboratory of High Performance Ceramics & Superfine Microstructure Studies, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
  • Received:2000-03-27 Online:2001-03-24 Published:2001-03-24

PDF (PC)

摘要： 采用5-硝基水杨酸合铁()分光光度法测定了2-膦酸丁烷-1,2,4-三羧酸(PBTCA)及柠檬酸在Al2O3表面的等温吸附线,发现二者的饱和吸附量均随pH值的升高而减小,且PBTCA比柠檬酸的饱和吸附量高.ζ电位及沉降实验亦表明,与柠檬酸相比,PBTCA的吸附使Al2O3表面的有效负电荷量更高,且其分散作用也更佳.采用FTIR及AES研究了PBTCA在Al2O3表面的吸附机理.膦酸基的存在提高了PBTCA在碱性条件下的吸附能力.

关键词: 氧化铝, 柠檬酸, 2-膦酸丁烷-1, 2, 4-三羧酸(PBTCA), 吸附

Abstract: The adsorption of 2-phosphonobutane 1,2,4-tricarboxylic acid (PBTCA) and citric acid on alumina was determined by using the ferric 5-nitrosalicylate spectroscopic method. The saturation adsorption of PBTCAwas found to be much higher than that of citric acid. FTIRand AESresults revealed that the phosphonyl group participated in the chemisorption of PBTCAonto alumina. The higher dispersing efficiency of PBTCAthan citric acid was attributed to its high number of charges and high chelating ability at high pH.

Key words: Alumina, Citric acid, PBTCA, Adsorption

中图分类号: 

TrendMD: