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Citation link: http://nbn-resolving.de/urn:nbn:de:gbv:46-diss000112626
00011262.pdf
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Applications of Earth's Field NMR to porous systems and polymer gels


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00011262.pdf3.48 MBAdobe PDFView/Open
Other Titles: Anwendungen von Erdfeld-NMR auf poröse Systeme und polymere Gele
Authors: Veevaete, Maarten 
Supervisor: Fischer, Helmut
1. Expert: Bleck-Neuhaus, Jörn
2. Expert: Stallmach, Frank 
Abstract: 
NMR relaxometry in the Earth's magnetic field is used to characterize porous systems and polymer gels. The used instrument is a home built Earth's field NMR (EFNMR) device equipped with some unique features such as first order gradiometer polarization and detection coils, shimming coils and a shielding box that make it possible to directly derive the relaxation times from the free induction decay signal inside a laboratory building with a signal to noise ratio of about 100. Different kinds of experiments show the dexterity of the EFNMR device in a broad range of applications. By analyzing the signal amplitude, information such as water content, water distribution or drying behavior of different kind of samples is obtained. From the analysis of the relaxation times, information about the environment of the protons is derived. In this way, the pore size distribution of porous materials and the polymerization characteristics of polymer gels containing water is obtained.
Keywords: Earth's field NMR, NMR relaxometry, low field NMR, porous systems, polymer gels
Issue Date: 9-Dec-2008
Type: Dissertation
URN: urn:nbn:de:gbv:46-diss000112626
Institution: Universität Bremen 
Faculty: FB1 Physik/Elektrotechnik 
Appears in Collections:Dissertationen

  

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