کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5208704 | 1382600 | 2011 | 70 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Structure and dynamics of hydrogels and organogels: An NMR spectroscopy approach Structure and dynamics of hydrogels and organogels: An NMR spectroscopy approach](/preview/png/5208704.png)
Hydrogels and organogels are semi-solid systems, in which a liquid phase is immobilized by a three-dimensional network composed of self-assembled, intertwined polymer/gelator fibers. Investigations pertaining to these systems have only picked up speed in the last few decades. Consequently, many burning questions regarding these systems, such as the specific molecular requirements guaranteeing gelation, still await definite answers. Nonetheless, the application of different hydrogels and organogels to various areas of interest, i.e., as drug delivery devices, has been quick to follow their discoveries.The use of NMR spectroscopy for the characterization of polymer hydrogels and organogels has recently seen enormous growth. The NMR measurements involving magic angle spinning (MAS) in the solid-state NMR, spin relaxation times, nuclear Overhauser enhancements (NOE), or multiple-quantum (MQ) spectroscopy, the pulse field gradient (PFG) technique and magnetic resonance imaging (MRI) allow obtaining the detailed information on morphology, molecular organization, specific interactions and internal mobility of constituents.This review aims at providing a global view and capabilities all of these NMR methods in comprehensive studies of hydrogels and organogels, with special emphasis on the interplay between the morphology and molecular mobility of constituents and the intermolecular interactions.
⺠Hydro-/organogels are semi-solid systems, with a liquid phase immobilized within a 3D network composed of self-assembled, intertwined polymer/gelator. ⺠NMR techniques allow obtaining the detailed information on morphology, molecular organization, specific interactions and internal mobility of the gel constituents. ⺠This review aims at providing a global view and capabilities of NMR in comprehensive studies of hydrogels and organogels.
Journal: Progress in Polymer Science - Volume 36, Issue 9, September 2011, Pages 1184-1253