物理化学学报 >> 2008, Vol. 24 >> Issue (03): 487-491.doi: 10.3866/PKU.WHXB20080324

研究论文 上一篇    下一篇

W/O微乳液中纳米Pd微粒的化学破乳沉积

周永华; 叶红齐   

  1. 中南大学化学化工学院粉体技术研究所, 长沙 410083
  • 收稿日期:2007-09-14 修回日期:2007-11-29 发布日期:2008-03-10
  • 通讯作者: 周永华 E-mail:zhouyh1976@hotmail.com

Deposition of Pd Nano-Particles in W/O Microemulsion by Chemical Demulsifying

ZHOU Yong-Hua; YE Hong-Qi   

  1. Institute of Powder Technology, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
  • Received:2007-09-14 Revised:2007-11-29 Published:2008-03-10
  • Contact: ZHOU Yong-Hua E-mail:zhouyh1976@hotmail.com

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摘要： 利用脂肪醇聚氧乙烯醚型非离子表面活性剂Marlipal O13/50、水、环己烷组成的W/O微乳液体系合成纳米Pd微粒, 考察了化学破乳剂作用下纳米Pd微粒的沉积过程. 结果表明, 不同化学破乳剂使纳米Pd微粒沉积的速率顺序为1,4-二噁烷跃四氢呋喃跃甲醇跃乙醇跃正丁醇. 研究了化学破乳剂对微乳液界面张力与两亲因子的影响. 结果表明, 微乳液结构的破坏是界面张力增大的过程, 同时也是两亲性降低而向Lifschitz线逐渐靠近的过程.

关键词: W/O微乳液, 钯, 纳米微粒, 沉积, 化学破乳

Abstract: Palladium nano-particles were synthesized by W/O microemulsion composed of nonionic surfactant (alkylpolyglycol ethers) named Marlipal O13/50, water and cyclohexane. The deposition of palladium nano-particles by chemicals demulsifying was investigated. The results showed that the sequence of deposition rate of palladium nano-particles from microemulsion under the action of different chemical demulsifier is 1,4-dioxane>THF>methanol>ethanol >n-butanol. The effects on interfacial tension and amphiphilicity of chemical demulsifier were studied. The results showed that the demulsifying process of microemulsion is also a process of interfacial tension increasing and a process gradually near to Lifschitz line.

Key words: W/O microemulsion, Palladium, Nano-particle, Deposition, Chemical demulsifying