中国物理B ›› 2018, Vol. 27 ›› Issue (2): 28201-028201.doi: 10.1088/1674-1056/27/2/028201

所属专题: SPECIAL TOPIC — Soft matter and biological physics

• SPECIAL TOPIC—Soft matter and biological physics • 上一篇    下一篇

Monitoring the formation of oil-water emulsions with a fast spatially resolved NMR spectroscopy method

Meng-Ting You(游梦婷), Zhi-Liang Wei(韦芝良), Jian Yang(杨健), Xiao-Hong Cui(崔晓红), Zhong Chen(陈忠)   

  1. 1. Department of Electronic Science, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, China;
    2. Department of Radiology, The Johns Hopkins University, Maryland, USA
  • 收稿日期:2017-08-06 修回日期:2017-12-01 出版日期:2018-02-05 发布日期:2018-02-05
  • 通讯作者: Xiao-Hong Cui E-mail:cuixh@xmu.edu.cn
  • 基金资助:

    Project supported by the Natural Science Foundation of Fujian Province, China (Grant Nos. 2016J01078 and 2017J05011), the Fundamental Research Funds for the Central Universities of China (Grant Nos. 20720160125 and 20720150018), and the National Natural Science Foundation of China (Grant No. 11705068).

Monitoring the formation of oil-water emulsions with a fast spatially resolved NMR spectroscopy method

Meng-Ting You(游梦婷)1, Zhi-Liang Wei(韦芝良)1,2, Jian Yang(杨健)1, Xiao-Hong Cui(崔晓红)1, Zhong Chen(陈忠)1   

  1. 1. Department of Electronic Science, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, China;
    2. Department of Radiology, The Johns Hopkins University, Maryland, USA
  • Received:2017-08-06 Revised:2017-12-01 Online:2018-02-05 Published:2018-02-05
  • Contact: Xiao-Hong Cui E-mail:cuixh@xmu.edu.cn
  • About author:82.56.-b; 76.60.-k; 82.70.Kj
  • Supported by:

    Project supported by the Natural Science Foundation of Fujian Province, China (Grant Nos. 2016J01078 and 2017J05011), the Fundamental Research Funds for the Central Universities of China (Grant Nos. 20720160125 and 20720150018), and the National Natural Science Foundation of China (Grant No. 11705068).

摘要:

In the present study, a fast chemical shift imaging (CSI) method has been used to dynamically monitor the formation of oil-water emulsions and the phase separation process of the emulsion phase from the excessive water or oil phase on the molecular level. With signals sampled from series of small voxels simultaneously within a few seconds, high-resolution one-dimensional (1D) 1H nuclear magnetic resonance (NMR) spectra from different spatial positions for inhomogeneous emulsion systems induced by susceptibility differences among components can be obtained independently. On the basis of integrals from these 1H NMR spectra, profiles obtained explicitly demonstrate the spatial and temporal variations of oil concentrations. Furthermore, the phase separation time and the length of the oil-water emulsion phase are determined. In addition, effects of oil types and proportions of the emulsifier on the emulsification states are also inspected. Experimental results indicate that 1D PHASICS (Partial Homogeneity Assisted Inhomogeneity Correction Spectroscopy) provides a helpful and promising alternative to research on dynamic processes or chemical reactions.

关键词: non-invasive monitoring, spatially-resolved NMR spectroscopy, formation of emulsions, phase separation process

Abstract:

In the present study, a fast chemical shift imaging (CSI) method has been used to dynamically monitor the formation of oil-water emulsions and the phase separation process of the emulsion phase from the excessive water or oil phase on the molecular level. With signals sampled from series of small voxels simultaneously within a few seconds, high-resolution one-dimensional (1D) 1H nuclear magnetic resonance (NMR) spectra from different spatial positions for inhomogeneous emulsion systems induced by susceptibility differences among components can be obtained independently. On the basis of integrals from these 1H NMR spectra, profiles obtained explicitly demonstrate the spatial and temporal variations of oil concentrations. Furthermore, the phase separation time and the length of the oil-water emulsion phase are determined. In addition, effects of oil types and proportions of the emulsifier on the emulsification states are also inspected. Experimental results indicate that 1D PHASICS (Partial Homogeneity Assisted Inhomogeneity Correction Spectroscopy) provides a helpful and promising alternative to research on dynamic processes or chemical reactions.

Key words: non-invasive monitoring, spatially-resolved NMR spectroscopy, formation of emulsions, phase separation process

中图分类号:  (Nuclear magnetic resonance)

  • 82.56.-b
76.60.-k (Nuclear magnetic resonance and relaxation) 82.70.Kj (Emulsions and suspensions)