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Time Domain Nuclear Magnetic Resonance Study of Dynamic Properties of Gelatin-Chitosan Blends Based Polymer Electrolyte

Grant number: 12/02775-7
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): April 01, 2012
Effective date (End): March 31, 2013
Field of knowledge:Physical Sciences and Mathematics - Physics - Condensed Matter Physics
Principal researcher:Caio Eduardo de Campos Tambelli
Grantee:Marcos Rafael Buzolim Gazzola
Home Institution: Faculdade de Zootecnia e Engenharia de Alimentos (FZEA). Universidade de São Paulo (USP). Pirassununga , SP, Brazil


This work report the study of the ionic transport properties of polymer systems with special attention on polymer electrolytes obtained from natural polymers. The natural polymers, as chitosan, agar, gelatin, starch, cellulose derivatives, have been drawing attention because of its specific properties, such as biodegrability, low cost and good physical and chemical properties. Will be used the nuclear magnetic resonance (NMR) applied to study of electrolyte of gelatin-chitosan blends -based polymer. The study of time domain NMR-TD will be realized by using inversion-recovery and CPMG (Carr - Purcel - Meiboom - Gill) pulse sequences to obtain the 1H spin lattice (T1) and spin-spin (T2) relaxation times, respectively. Due to structural complexity found in these natural polymers, the magnetization decay obtained from NMR experiments usually shows a multi-exponentials form that could be interpreted by a continuous distribution of relaxation times. These analysis data will allow obtaining the information about structural and molecular mobility of proton in these materials.

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