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Faculty of Science - AL Faisaliah Campus
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 Type
Dr Grade
Email
سهاد عبد الخالق الشريف
Alshareef, sohad Abdulkaleg
Researcher
Master
Sohad-a@hotmail.com
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