Document Details

Document Type : Thesis 
Document Title :
Preparation of Some Chitosan Derivatives and Studying of Some Their Application
تحضير بعض مشتقات الكيتوزان ودراسة بعض تطبيقاتها
 
Subject : Preparation of Some Chitosan Derivatives and Studying of Some Their Application 
Document Language : Arabic 
Abstract : Chitin is the main source of Chitosan and is the second most abundant biopolymers in nature after cellulose, a key component of the external structure of insects and crustaceans such as lobsters, shrimp and oysters. One of the most important properties of Chitosan is its non-toxicity, biocompatibility and biodegradability. Crosslinking is an appropriate and effective way to improve the physical and chemical properties of Chitosan and to enhance its stability in acidic solutions where glutaraldehyde is considered as the most commonly used crosslinker for Chitosan. Although crown ether has selective formation of complexes with many metal ions, it is not considered successful ideal catalyst as it can't be easily removed from the reactions in addition to its adverse impact on the human being whereas crown ether-grafted Chitosan shows microstructure and properties better than each of Chitosan and crown ether. It helps the formation of complexes with palladium ions. Such complexes are of high stability and selectivity and serve as a good catalyst that can be retrieved and environmentally friendly. The current work is aiming to modify Chitosan with different organic compounds such as aldehydes and carboxylic acids to produce different derivatives of Chitosan useful in isolation and separation of metal ions through the formation of different complexes. Also, it is aiming too modify Chitosan into derivatives of quaternary ammonium salts through direct alkylation with different alkyl halide; dimethyl sulfate or glycidyl trimethyl ammonium chloride to investigate the applicability in the field of phase transfer catalysis. The obtained products have been characterized with FT-IR and NMR spectroscopy in addition to some chemical tests to prove the formation of the different products and also to prove its ability to be used as polymer-supported phase transfer catalysts. 
Supervisor : Prof. Dr. Magdy Youssef Ali Abdelaal 
Thesis Type : Master Thesis 
Publishing Year : 1431 AH
2010 AD 
Number Of Pages : 105 
Added Date : Saturday, July 3, 2010 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
سهاد عبد الخالق الشريفAlshareef, sohad AbdulkalegResearcherMasterSohad-a@hotmail.com

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