پديد آورنده :
كسرايي، شبنم
عنوان :
بررسي امكان توليد نانو الياف مشتقات محلول در آب كيتوسان و خواص آنها
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
شيمي نساجي و علوم الياف
محل تحصيل :
اصفهان، دانشگاه صنعتي اصفهان، دانشكده نساجي
صفحه شمار :
يازده،98،[II]ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
حسين توانايي
توصيفگر ها :
الكتروريسي , كربوكسي متيل كتيوسان , ضد باكتري , پلي وينيل الكل , پلي اتيلن اكسايد
تاريخ نمايه سازي :
16/9/88
استاد داور :
مجيد مرتضوي، مهران غياثي
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
The study of electrospinning of water soluble chitosan derivatives fibers and their properties Shabnam kasraei Kasraei shabnam@yahoo com Date of Submission 04 May 2009 Department of Textile engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor tavanai@cc iut ac irAbstractProduction of nanofibers through electrospinning has attracted the attention of many researchersbecause of their unique properties and remarkable advantages Carboxymethylchitosan is anintresting natural biopolymer for many of its merits and good biological properties in thisresearch we investigated the electrospinning of carboxymethylchitosan in two parts In the firstpart the pure carboxymethylchitosan system was studied and then the effects of additives such asacid and some organic solvents to improve the spinnability of the polymer solution was alsoinvestigated The results showed that aqueous solution of carboxymethylchitosan can not beelectrospun into ultrafine fibers and even introducing additives to the polymer solution did notmake the electrpspinning of carboxymethylchitosan possible In the second part blended systems of carboxymethylchitosan and poly vinyl alcohol andpoly ethylene oxide separately were examined and were electrospun The morphology anddiameter of electrospun fibers were observed and determined with the use of an optical andscanning electron microscope SEM The SEM photographs indicated thatcarboxymethylchitosan 6 w v PVA 8 w v blended system in the volume ratio 35 65 andcarboxymethylchitosan 6 w v PEO 6 w v blended system in the volume ratio 50 50 couldbe electrospun to homogenous fibers with an average diameter 218 3 nm and 83 2nm respectively Rheological studies showed a strong dependence of electrospinnability and fiber morphology onsolution viscosity and thus on carboxymethylchitosan to synthetic polymer PVA or PEO blendratios In addition FTIR technique has been used to characterize the miscibility of polymerblends Results also showed that increasing the proportion of carboxymethylchitosan in polymeric blendsincreased the moisture absorption and crystalinity of nanofibers The antibacterial tests showed that blends of carboxymethylchitosan poly vinyl alcohol andcarboxymethylchitosan poly ethylene oxide nanofibers have very good antibacterial propertieswhereas poly vinyl alcohol and poly ethylene oxide nanofibers performed extremely poor Key words CMCH polymer blending PVA PEO electrospinning moisture absorption antibacterial properties
استاد راهنما :
حسين توانايي
استاد داور :
مجيد مرتضوي، مهران غياثي
