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Synthesis of some chitosan derivatives and their hybrid biomaterials / Hend Ezzat Salama Hamd ;supervised Magdy Sabaa Wadid Farag Sabaa ,Gamal Riad Saad

By: Contributor(s): Material type: TextTextLanguage: English Publication details: Cairo : Hend Ezzat Salama Hamd , 2016Description: 179 P. : charts , facsimiles ; 25cmOther title:
  • تحضير بعض مشتقات الكيتوزان وموادها الحيوية المهجنة [Added title page title]
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  • Issued also as CD
Dissertation note: Thesis (Ph.D.) - Cairo University - Faculty of Science - Department of Organic Chemistry Summary: First, five derivatives of chitosan Schiff bases were successfully synthesized by the condensation of 3-(4-substituted-phenyl)-1-phenyl-1H-pyrazole-4-carbaldehyde with chitosan (Ch), also the reduced and quaternized forms of the Schiff base derivatives were prepared successfully. The reduction of crystallinity and thermal stability of the prepared chitosan Schiff bases compared with chitosan were characterized by X-ray diffraction (XRD) and thermogravimetric analysis (TG). The activation energy of the decomposition was calculated using Coats{u2013}Redfern model. The adsorption of Congo Red (CR) and Maxilon Blue (MB) dyes onto chitosan and chitosan Schiff base derivatives were investigated. The results of antimicrobial activities indicated that the Schiff base derivatives and their reduced forms had excellent antimicrobial activities compared with chitosan. Second, biguanidinylated chitosan (ChG) and carboxymethyl chitosan (CMG) were successfully synthesized through the reaction of chitosan or carboxymethyl chitosan with cyanoguanidine. Glutaraldehyde cross-linked chitosan biguanidine (CChG) and carboxymethyl chitosan biguanidine (CCMG) and their silver nanocomposites (CChG/AgNPs and CCMG/AgNPs) were also prepared successfully. XRD data confirmed the presence of AgNPs with face-centered cubic (fcc) crystal structure.
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Item type Current library Home library Call number Copy number Status Date due Barcode
Thesis Thesis قاعة الرسائل الجامعية - الدور الاول المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.12.10.Ph.D.2016.He.S (Browse shelf(Opens below)) Not for loan 01010110071870000
CD - Rom CD - Rom مخـــزن الرســائل الجـــامعية - البدروم المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.12.10.Ph.D.2016.He.S (Browse shelf(Opens below)) 71870.CD Not for loan 01020110071870000

Thesis (Ph.D.) - Cairo University - Faculty of Science - Department of Organic Chemistry

First, five derivatives of chitosan Schiff bases were successfully synthesized by the condensation of 3-(4-substituted-phenyl)-1-phenyl-1H-pyrazole-4-carbaldehyde with chitosan (Ch), also the reduced and quaternized forms of the Schiff base derivatives were prepared successfully. The reduction of crystallinity and thermal stability of the prepared chitosan Schiff bases compared with chitosan were characterized by X-ray diffraction (XRD) and thermogravimetric analysis (TG). The activation energy of the decomposition was calculated using Coats{u2013}Redfern model. The adsorption of Congo Red (CR) and Maxilon Blue (MB) dyes onto chitosan and chitosan Schiff base derivatives were investigated. The results of antimicrobial activities indicated that the Schiff base derivatives and their reduced forms had excellent antimicrobial activities compared with chitosan. Second, biguanidinylated chitosan (ChG) and carboxymethyl chitosan (CMG) were successfully synthesized through the reaction of chitosan or carboxymethyl chitosan with cyanoguanidine. Glutaraldehyde cross-linked chitosan biguanidine (CChG) and carboxymethyl chitosan biguanidine (CCMG) and their silver nanocomposites (CChG/AgNPs and CCMG/AgNPs) were also prepared successfully. XRD data confirmed the presence of AgNPs with face-centered cubic (fcc) crystal structure.

Issued also as CD

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