波谱学杂志 ›› 1997, Vol. 14 ›› Issue (4): 319-323.

• 研究论文 • 上一篇    下一篇

自扩散系数的脉冲梯度-自旋回波的测量及其应用

姜立红, 王黎明, 岳勇, 杜有如   

  1. 中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室, 武汉 430071
  • 收稿日期:1997-02-20 修回日期:1997-03-19 出版日期:1997-08-05 发布日期:2018-01-22
  • 作者简介:姜立红,女,26岁,硕士研究生
  • 基金资助:
    攀登(B)计划“复合驱强化采油技术中重大基础性研究”资助项目

SELF-DIFFUSION COEFFICIENT MEASUREMENT USING PGSE AND ITS APPLICATION

Jiang Lihong, Wang Liming, Yue Yong, Du Youru   

  1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071
  • Received:1997-02-20 Revised:1997-03-19 Online:1997-08-05 Published:2018-01-22

摘要: 通过对受激回波,纵向涡流延迟(LED),偶极梯度-纵向涡流延迟(LED-BPP)三个脉冲序列的比较,挑选出最适合于测量有耦合体系的分子的自扩散系数的脉冲序列,并用它测量了一系列不同浓度的C12AS-D2O溶液和C12AS-D2O-0.1mol/L NaCl溶液的自扩散系数,得到了C12AS在水溶液中聚集过程的信息.

关键词: 十二烷基磺酸钠, 自扩散系数, 受激回波, LED, LED-BPP

Abstract: By comparing three pulse sequences STE LED LED-BPP, one is selected, which is the best to measure the self-diffosion coefficient of surfactant solution, in which there exists coupling effect. Self-diffusion coefficients of a series of sodium dodecyl sulfonate D2O and D2O-NaCl solutions with different concentrations were measured. The aggregation behavior of this surfactant in aqueous solution is thus deduced.

Key words: Sodium dodecyl sulfonate, Self-diffusion coefficient, Stimulated echo, LED, LED-BPP