Synthesis and characterization of superabsorbents based on modified starch for improving water and saline absorbency / (Record no. 67866)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 02734cam a2200337 a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | EG-GiCUC |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20250223032056.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 181008s2018 ua dh f m 000 0 eng d |
| 040 ## - CATALOGING SOURCE | |
| Original cataloging agency | EG-GiCUC |
| Language of cataloging | eng |
| Transcribing agency | EG-GiCUC |
| 041 0# - LANGUAGE CODE | |
| Language code of text/sound track or separate title | eng |
| 049 ## - LOCAL HOLDINGS (OCLC) | |
| Holding library | Deposite |
| 097 ## - Thesis Degree | |
| Thesis Level | M.Sc |
| 099 ## - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Classification number | Cai01.12.10.M.Sc.2018.Ga.S |
| 100 0# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Gamal Mohamed Zain Ahmed |
| 245 10 - TITLE STATEMENT | |
| Title | Synthesis and characterization of superabsorbents based on modified starch for improving water and saline absorbency / |
| Statement of responsibility, etc. | Gamal Mohamed Zain Ahmed ; Superised Fawzy Ali Attabi , Ahmed Ibrahim waly |
| 246 15 - VARYING FORM OF TITLE | |
| Title proper/short title | تحضير وتوصيف بوليمرات هيدرولوجيلية مبنية على النشا المحور لتحسين امتصاص الماء والمحاليل المائية |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. | |
| Place of publication, distribution, etc. | Cairo : |
| Name of publisher, distributor, etc. | Gamal Mohamed Zain Ahmed , |
| Date of publication, distribution, etc. | 2018 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 103 P. : |
| Other physical details | charts , facsimiles ; |
| Dimensions | 25cm |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (M.Sc.) - Cairo University - Faculty of Science - Department of Organic Chemistry |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | New starch derivatives containing sulfonated functional groups were prepared through intermediate triazinyl compounds. Four different bridging compounds were synthesized and characterized via spectral analysis. The sulfonated triazinyl compounds were reacted with native starch to obtain different density of sulfonic acid groups on starch backbone. The sulfonic acid groups were introduced in different degree of substitutions (0.043, 0.032, 0.006 and 0.008). A new amphoteric superabsorbent based on sodium starch sulfonate (SSS) is prepared by an indirect method. The sodium starch sulfonate was then graft-polymerized with acrylonitrile and the nitrile groups of the sodium starch sulfonate -g-polyacrylonitrile were converted to a mixture of hydrophilic carboxamide and carboxylate groups by alkaline hydrolysis. Optimum conditions of the co-polymerization were studied and recorded for 120 min polymerization time, 0.75% Ammonium persulfate (APS) associated with sodium bisulfite (50% of APS), 65oC for polymerization temperature and double molar ratio of acrylonitrile to the starch derivatives. The grafted acrylonitrile and the saponified products were spectrally characterized. The hydrogel based on the sulfonated starch derivatives showed superior water absorbency for both distilled and saline solutions over that of native starch |
| 530 ## - ADDITIONAL PHYSICAL FORM AVAILABLE NOTE | |
| Additional physical form available note | Issued also as CD |
| 653 #4 - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Modified starch for improving water |
| 653 #4 - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Saline absorbency |
| 653 #4 - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Superabsorbents based |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Ahmed Ibrahim waly , |
| Relator term | |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Fawzy Ali Attabi , |
| Relator term | |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="http://172.23.153.220/th.pdf">http://172.23.153.220/th.pdf</a> |
| 905 ## - LOCAL DATA ELEMENT E, LDE (RLIN) | |
| Cataloger | Nazla |
| Reviser | Revisor |
| 905 ## - LOCAL DATA ELEMENT E, LDE (RLIN) | |
| Cataloger | Shimaa |
| Reviser | Cataloger |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Koha item type | Thesis |
| Source of classification or shelving scheme | Not for loan | Home library | Current library | Date acquired | Full call number | Barcode | Date last seen | Koha item type | Copy number |
|---|---|---|---|---|---|---|---|---|---|
| Dewey Decimal Classification | المكتبة المركزبة الجديدة - جامعة القاهرة | قاعة الرسائل الجامعية - الدور الاول | 11.02.2024 | Cai01.12.10.M.Sc.2018.Ga.S | 01010110076079000 | 22.09.2023 | Thesis | ||
| Dewey Decimal Classification | المكتبة المركزبة الجديدة - جامعة القاهرة | مخـــزن الرســائل الجـــامعية - البدروم | 11.02.2024 | Cai01.12.10.M.Sc.2018.Ga.S | 01020110076079000 | 22.09.2023 | CD - Rom | 76079.CD |