Diffusive MASS NMR Studies of Transport in Porous Materials
NMR methods are widely used to probe the structure and fluid dynamics of porous materials including such diverse materials as cheese and chocolate, cosmetics and pharmaceuticals, solvents in resins and soft matter, biological tissue, and for oil exploration. NMR measurements are uniquely suited to t...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Technical Report |
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Massachusetts Institute of Technology. Earth Resources Laboratory
2012
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| Online Access: | http://hdl.handle.net/1721.1/68603 |
| _version_ | 1826214477462241280 |
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| author | Liu, Yun Leu, Gabriela Cory, David G. Sen, Pabitra |
| author2 | Massachusetts Institute of Technology. Earth Resources Laboratory |
| author_facet | Massachusetts Institute of Technology. Earth Resources Laboratory Liu, Yun Leu, Gabriela Cory, David G. Sen, Pabitra |
| author_sort | Liu, Yun |
| collection | MIT |
| description | NMR methods are widely used to probe the structure and fluid dynamics of porous materials including such diverse materials as cheese and chocolate, cosmetics and pharmaceuticals, solvents in resins and soft matter, biological tissue, and for oil exploration. NMR measurements are uniquely suited to these studies since it records the correlation of changing local magnetic fields over a time scale of ms to seconds. The local magnetic fields are established by local variations in the bulk magnetic susceptibility of the sample (and so are directly tied to the sample's local structure). The fluctuation in field that a spin sees is due to molecular transport (including molecular diffusion) through these local fields, and so reports on the length scales of structures and impediments to transport. In the past this information has primarily been employed via empirical relations that relate bulk measurements of relaxation times or diffusion to some microscopic property (pore size, throat size, S/V, and surface relaxivity, etc.). These empirical relationships, while useful, hide the underlying complexity of spin dynamics in confining geometries. We have developed a new set of methods to provide a means of systematically varying the reflective time scale of the measurement and thus the reflective length scale. This new handle permits a detailed, microscopic picture of the structure and dynamics. |
| first_indexed | 2024-09-23T16:05:41Z |
| format | Technical Report |
| id | mit-1721.1/68603 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T16:05:41Z |
| publishDate | 2012 |
| publisher | Massachusetts Institute of Technology. Earth Resources Laboratory |
| record_format | dspace |
| spelling | mit-1721.1/686032019-04-12T15:20:16Z Diffusive MASS NMR Studies of Transport in Porous Materials Liu, Yun Leu, Gabriela Cory, David G. Sen, Pabitra Massachusetts Institute of Technology. Earth Resources Laboratory Liu, Yun Leu, Gabriela Cory, David G. NMR methods are widely used to probe the structure and fluid dynamics of porous materials including such diverse materials as cheese and chocolate, cosmetics and pharmaceuticals, solvents in resins and soft matter, biological tissue, and for oil exploration. NMR measurements are uniquely suited to these studies since it records the correlation of changing local magnetic fields over a time scale of ms to seconds. The local magnetic fields are established by local variations in the bulk magnetic susceptibility of the sample (and so are directly tied to the sample's local structure). The fluctuation in field that a spin sees is due to molecular transport (including molecular diffusion) through these local fields, and so reports on the length scales of structures and impediments to transport. In the past this information has primarily been employed via empirical relations that relate bulk measurements of relaxation times or diffusion to some microscopic property (pore size, throat size, S/V, and surface relaxivity, etc.). These empirical relationships, while useful, hide the underlying complexity of spin dynamics in confining geometries. We have developed a new set of methods to provide a means of systematically varying the reflective time scale of the measurement and thus the reflective length scale. This new handle permits a detailed, microscopic picture of the structure and dynamics. 2012-01-17T18:09:22Z 2012-01-17T18:09:22Z 2001 Technical Report http://hdl.handle.net/1721.1/68603 Earth Resources Laboratory Industry Consortia Annual Report;2001-08 application/pdf Massachusetts Institute of Technology. Earth Resources Laboratory |
| spellingShingle | Liu, Yun Leu, Gabriela Cory, David G. Sen, Pabitra Diffusive MASS NMR Studies of Transport in Porous Materials |
| title | Diffusive MASS NMR Studies of Transport in Porous Materials |
| title_full | Diffusive MASS NMR Studies of Transport in Porous Materials |
| title_fullStr | Diffusive MASS NMR Studies of Transport in Porous Materials |
| title_full_unstemmed | Diffusive MASS NMR Studies of Transport in Porous Materials |
| title_short | Diffusive MASS NMR Studies of Transport in Porous Materials |
| title_sort | diffusive mass nmr studies of transport in porous materials |
| url | http://hdl.handle.net/1721.1/68603 |
| work_keys_str_mv | AT liuyun diffusivemassnmrstudiesoftransportinporousmaterials AT leugabriela diffusivemassnmrstudiesoftransportinporousmaterials AT corydavidg diffusivemassnmrstudiesoftransportinporousmaterials AT senpabitra diffusivemassnmrstudiesoftransportinporousmaterials |