عنوان :
بررسي امكان توليد الياف نانو از سديم آلجينات به روش الكتروريسي
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
﴿شيمي نساجي و علوم الياف﴾
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده نساجي
صفحه شمار :
[الف]، ده، 214،[II] ص: مصور، جدول، شكل، نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
محمد مرشد، سيد عبدالكريم حسيني
استاد مشاور :
مهران غياثي
توصيفگر ها :
ويسكوزيته , ژل شدن , بيوكاتاليستهاي ساكن , عمليات فرمالدئيد
استاد داور :
حسين توانايي، مهدي اميرنصر
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Abstract In the past decade electrospinning has attracted tremendous interests in many researchfields simply because it provides a facile and effective means in producing ultrafine fiberswith diameters ranging from microns down to a few nano meters Alginate is an interesting natural biopolymer for many of its merits and goodbiological properties In this research we investigated electrospinning of sodium alginate in two parts Inthe first part the pure alginate system was studied and then effects of additives such asacid surfactant and some organic solvents to improve the spinnability of the polymersolution was also investigated The results showed that water solution of sodium alginate can not be electrospun intoultrafine fibers and even by introducing additives in the polymer solution was notspinnable by this technique In the second part blended systems were examined Sodium alginate was mixed withpoly vinyl alcohol and poly ethylene oxide separately and under optimized conditions they were electrospun The morphology and diameter of the electrospun fibers were observed and determinedwith the use of an optical microscope and a scanning electron microscope SEM The SEMphotographs indicated that the alginate 2 w v PVA 8 w v blended system in thevolume ratio 70 30 and the alginate 2 w v PEO 8 w v blended system in the volumeratio 50 50 could be spun to homogenous fibers with average diameter 118 3 nm diameterdistribution 75 8 204 nm and 99 1 nm diameter distribution 71 122 nm respectively Rheological studies showed a strong dependence of spinnability and fiber morphologyon solution viscosity and thus on alginate to synthetic polymer PEO or PVA blend ratios In addition FTIR technique has been used to characterize the miscibility of polymerblends
استاد راهنما :
محمد مرشد، سيد عبدالكريم حسيني
استاد مشاور :
مهران غياثي
استاد داور :
حسين توانايي، مهدي اميرنصر
