| TMAH对TiN纳米粉体分散行为的影响 |
| Effect of TMAH on Dispersion Behavior of TiN Nanoparticles |
| 作者 | 单位 | E-mail | | 李海淼 | 浙江大学材料科学与工程学系, 杭州, 310027 | | | 郭兴忠 | 浙江大学材料科学与工程学系, 杭州, 310027 | msewj01@zju.edu.cn | | 朱潇怡 | 浙江大学材料科学与工程学系, 杭州, 310027 | | | 杨辉 | 浙江大学材料科学与工程学系, 杭州, 310027 | | | 高黎华 | 浙江东新密封有限公司, 乐清, 325604 | |
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| 摘要: 采用四甲基氢氧化铵(TMAH)作为分散剂,利用沉降法、ξ电位、粒度分析、TEM等研究了TiN纳米粉体在水介质中的分散稳定机制,探讨了pH值和分散剂对纳米颗粒分散行为的影响.结果表明:TiN纳米粉体的分散行为遵循静电稳定机制,pH值对TiN纳米粉体的分散性和稳定性有较大影响,在pH=8处TiN纳米粉体有较好的分散效果.有机阳离子型分散剂TMAH能在TiN纳米颗粒表面形成特征吸附,并通过静电作用和空间位阻作用提高TiN纳米颗粒的分散性.在pH=8、TMAH加入量为0.75wt%的条件下,TiN纳米粉体获得无团聚的最佳分散状态,悬浮液稳定时间可达1个月. |
| 关键词: TMAH TiN纳米颗粒 分散行为 |
| 基金项目: 高等学校博士点基金新教师(No.20070335017);浙江省重大科技攻关(No.2006C11184)资助项目 |
| Abstract: With tetramethyl ammonium hydroxide(TMAH) as dispersant,the dispersion and stabilization mechanism of TiN nanoparticles aqueous suspension were studied by sedimentation test,ξ potential,granularity analysis and TEM,and the effect of pH value and dispersant was discussed.The results showed that the dispersion behavior of TiN nanoparticles followed the mechanism of electrostatic stabilization.The dispersibility and stability of TiN nanoparticles were strongly influenced by pH value,and the better dispersed result was obtained when the pH value was 8.The organic cation dispersant TMAH could be absorbed onto the TiN nanoparticles,and the dispersibility of TiN nanoparticles was improved by electrostatic and steric effect.The best non-agglomerated dispersion state was obtained when the pH value was 8 and the amount of TMAH was 0.75wt%.The stable time of nano-TiN suspension could last for about one month. |
| Keywords: TMAH TiN nanoparticles dispersion behavior |
| 投稿时间：2007-11-26 修订日期：2008-01-11 |
| 摘要点击次数: 1423 |
| 全文下载次数: 1987 |
| 李海淼,郭兴忠,朱潇怡,杨辉,高黎华.TMAH对TiN纳米粉体分散行为的影响[J].无机化学学报,2008,24(3):456-460. |
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