پديد آورنده :
زهتابي، فاطمه
عنوان :
سنتز و بررسي خواص تورمي هيدروژل آلجينات ﴿2-﴿دي متيل آمينو﴾ اتيل متا كريلات﴾ توسط تابش گاما
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
شيمي نساجي
محل تحصيل :
اصفهان، دانشگاه صنعتي اصفهان، دانشكده نساجي
صفحه شمار :
دوازده،104،[II]ص.:مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
علي زادهوش
استاد مشاور :
قاسم رضا نژاد
توصيفگر ها :
ابرجاذب , شبكه اي كرون پرتوي , پليمريزاسيون پيوندي
تاريخ نمايه سازي :
16/9/88
استاد داور :
مجيد مرتضوي، روح ا... باقري
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Synthesis and characterization of hydrogel based on Alginate grafted 2 dimethylamino ethyl methacrylateVia gamma radiation Fateme zehtabi fatemezehtabi@yahoo com Date of Submission 26 4 2009 Department of Textile engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor Ali zadhoosh @cc iut ac ir Abstract Hydrogels are 3 D crosslinked hydrophilic polymer networks that absorb large amounts of water up to hundred or thousand times of its dead weight without dissolving Hydrogels can be prepared starting from hydrophilic monomers prepolymers or existing hydrophilic polymers They can be prepared by two methods chemical and irradiation Gamma Radiation can be used as a initiator and a cross linker Graft copolymerization of hydrophilic monomers and polyfunctional comonomers leads to the formation of hydrophilic network structures Cross linking during polymerization is an important factor that yields a network polymer which will not dissolve in water and can absorb and retain water under low load In the present study hydrophilic hydrogels based on poly 2 Dimethyl amino ethyl methacrylate as synthetic monomer and sodium alginates as natural polymer AG were prepared by gamma irradiation Excellent water absorption and water retention abilities was shown by the synthesized copolymer for the first time Optimization of the experiments were carried out by design of experimental methods For investigation of the effect of reaction variables on water absorbency of the hydrogels the synthetic conditions were systematically optimized through studying the influential factors including dose rate irradiation and concentration of monomer and alginate The effect of grafting variables were systematically optimized to achieve a hydrogel with a maximum swelling capacity The swelling of superabsorbent hydrogels was measured in various solutions with pH values ranging from 1 to 13 Factors which influence the water uptake of hydrogel such sensitivity to the salt solution swelling kinetics in distilled water PH reversibility and on off switching were investigated The hydrogel was characterized using FTIR spectroscopy TGA and SEM The hydrogel behaviour is influenced by two main parameters ie grafting percentage and extent of crosslinking By increasing these two parameters the extent of uptake is reduced Generally environmental factors such as ionic strength Ph partical size of hydrogel and chemical structure of the swelling medium can influence the adsorption capacity of the hydrogel Keywords Super absorbent Hydrogel Gamma radiation Graft copolymerization pdfMachine Is a pdf writer that produces quality PDF files with ease Produce quality PDF files in seconds and preserve the integrity of your original documents Compatible across nearly all Windows platforms if you can print from a windows application you can use pdfMachine Get yours now
استاد راهنما :
علي زادهوش
استاد مشاور :
قاسم رضا نژاد
استاد داور :
مجيد مرتضوي، روح ا... باقري
