聚丙烯酸铵在纳米氮化钛上的定量吸附研究

无机材料学报

聚丙烯酸铵在纳米氮化钛上的定量吸附研究

李景国; 高濂; 郭景坤

中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室上海 200050

收稿日期:2001-03-21 修回日期:2001-04-11 出版日期:2002-03-20 网络出版日期:2002-03-20

Quantitative Adsorption of PAA-NH₄ on Nanosized Titanium Nitride

LI Jing-Guo; GAO Lian; GUO Jing-Kun

State Key Lab of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China

Received:2001-03-21 Revised:2001-04-11 Published:2002-03-20 Online:2002-03-20

摘要/Abstract

摘要： 研究了聚丙烯酸铵在纳米氮化钛粉体上的定量吸附及其影响因素．实验结果表明：纳米氮化钛的等电点在ｐＨ＝３．８左右，加入分散剂ＰＡＡ－ＮＨ_４后，等电点移至ｐＨ＝２附近，ＰＡＡ－ＸＨ_４在纳米氮化钛上的吸附量随吸附时间的增加而增加；同时溶液的酸碱性也影响吸附量，扫描俄歇分析结果表明：ＰＡＡ－ＮH₄吸附在纳米氮化钛颗粒表面上．

关键词: 聚丙烯酸铵, 定量吸附, 纳米氮化钛

Abstract: The role of ammonium salt of polyacrylic acid (NH₄-PAA) in the dispersion of nanosized titanium nitride aqueous suspensions was investigated experimentally. Surface chemistry of the suspension was investigated by scanning auger microscopy (SAM). Zeta potential studies show that the isoelectric point of nanosized TiN powders is at pH=3.8 and NH₄-PAA addition results in the shift of isoelectric point from pH=3.8 to pH =2. The adsorption of PAA-NH₄ decreases as pH values increase, because PAA-NH₄ is more negatively dissociated.

Key words: ammonium salt of polyacrylic acid, quantitative adsorption, nano-size titanium nitride

中图分类号:

TF123

李景国,高濂,郭景坤. 聚丙烯酸铵在纳米氮化钛上的定量吸附研究[J]. 无机材料学报.

LI Jing-Guo,GAO Lian,GUO Jing-Kun. Quantitative Adsorption of PAA-NH₄ on Nanosized Titanium Nitride[J]. Journal of Inorganic Materials.

[1]	孙静,孙伟燕,高濂,郭景坤. 聚乙烯亚胺在SiC粉体上的定量吸附研究[J]. 无机材料学报, 2000, 15(2): 259-263.
[2]	孙静,孙伟燕,高濂,郭景坤. 聚丙烯酸铵在纳米Y-TZP上的定量吸附研究[J]. 无机材料学报, 1999, 14(4): 645-650.