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NMR Self-Diffusion Studies of Surfactant and Polymer Systems. Methodology and Applications

Håkansson, Björn LU (1999)
Abstract
The main focus of this thesis has been to explore how the PFG NMR technique for diffusion measurements can be used to obtain useful information from various systems. The investigated systems have one thing in common; they belong to the general field of surface and colloid chemistry.



The thesis is divided in two parts: one section is a summary and the other section contains four publications from different scientific journals and, in addition, one manuscript. The first chapter in the summary treats the most important part of a gradient experiment, i.e., the gradient probe. Here, the aim is to explain how the gradient probe is constructed and also to discuss some additional problems regarding the equipment that one may... (More)
The main focus of this thesis has been to explore how the PFG NMR technique for diffusion measurements can be used to obtain useful information from various systems. The investigated systems have one thing in common; they belong to the general field of surface and colloid chemistry.



The thesis is divided in two parts: one section is a summary and the other section contains four publications from different scientific journals and, in addition, one manuscript. The first chapter in the summary treats the most important part of a gradient experiment, i.e., the gradient probe. Here, the aim is to explain how the gradient probe is constructed and also to discuss some additional problems regarding the equipment that one may encounter when doing PFG NMR diffusion experiments. In the second chapter, I introduce the PFG NMR concept and some of the theory behind these experiments. Finally, in the third chapter I summarize and discuss the findings of the papers. The influence of a nonconstant magnetic field gradient on PFG SE NMR diffusion experiments was investigated in paper I, by performing computer simulations. In paper II the technique has been used to investigate a nonionic surfactant (or rather an amphiphilic polymer)/water system, and in paper III the influence of a molecular weight distribution of polymers on PFG NMR measurements are considered. Paper IV and V are examples where the technique has been used in emulsion systems. Paper IV applies the technique to a double emulsion (water in oil in water emulsion), while paper V shows diffraction-like effects in a highly concentrated water in oil emulsion.



The interpretation of the positions of the diffraction-like peaks in paper V convey structural information without the need of complicated mathematical modeling. (Less)
Please use this url to cite or link to this publication:
author
opponent
  • Stilbs, Peter
organization
publishing date
type
Thesis
publication status
published
subject
keywords
Physical chemistry, Fysikalisk kemi
pages
39 pages
publisher
Physical Chemistry 1, Lund University
defense location
N/A
defense date
1999-05-28 10:15
external identifiers
  • other:ISRN: LUNKDL/NKFK--99/1049--SE
ISBN
91-628-3576-9
language
English
LU publication?
yes
id
d58c0d5d-fe99-4a72-ac13-7070da4bc2e8 (old id 39721)
date added to LUP
2007-08-01 09:24:13
date last changed
2016-09-19 08:45:01
@phdthesis{d58c0d5d-fe99-4a72-ac13-7070da4bc2e8,
  abstract     = {The main focus of this thesis has been to explore how the PFG NMR technique for diffusion measurements can be used to obtain useful information from various systems. The investigated systems have one thing in common; they belong to the general field of surface and colloid chemistry.<br/><br>
<br/><br>
The thesis is divided in two parts: one section is a summary and the other section contains four publications from different scientific journals and, in addition, one manuscript. The first chapter in the summary treats the most important part of a gradient experiment, i.e., the gradient probe. Here, the aim is to explain how the gradient probe is constructed and also to discuss some additional problems regarding the equipment that one may encounter when doing PFG NMR diffusion experiments. In the second chapter, I introduce the PFG NMR concept and some of the theory behind these experiments. Finally, in the third chapter I summarize and discuss the findings of the papers. The influence of a nonconstant magnetic field gradient on PFG SE NMR diffusion experiments was investigated in paper I, by performing computer simulations. In paper II the technique has been used to investigate a nonionic surfactant (or rather an amphiphilic polymer)/water system, and in paper III the influence of a molecular weight distribution of polymers on PFG NMR measurements are considered. Paper IV and V are examples where the technique has been used in emulsion systems. Paper IV applies the technique to a double emulsion (water in oil in water emulsion), while paper V shows diffraction-like effects in a highly concentrated water in oil emulsion.<br/><br>
<br/><br>
The interpretation of the positions of the diffraction-like peaks in paper V convey structural information without the need of complicated mathematical modeling.},
  author       = {Håkansson, Björn},
  isbn         = {91-628-3576-9},
  keyword      = {Physical chemistry,Fysikalisk kemi},
  language     = {eng},
  pages        = {39},
  publisher    = {Physical Chemistry 1, Lund University},
  school       = {Lund University},
  title        = {NMR Self-Diffusion Studies of Surfactant and Polymer Systems. Methodology and Applications},
  year         = {1999},
}