پديد آورنده :
ابوزاده گتابي، رمضانعلي
عنوان :
مطالعه نظري و تجربي اثر منافذ بر قابليت گذر دهي هوا در وب نانوالياف
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده نساجي
صفحه شمار :
چهارده،116ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
علي اكبر قره آغاجي، علي زادهوش
تاريخ نمايه سازي :
1/8/91
استاد داور :
صديقه برهاني، مسعود لطفي، احمد محب
كد ايرانداك :
ID459 دكتري
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Abstract The nanofibrous structures have received considerable attention in recent years Because ofthe extraordinary features such as high porosity high specific area and desirable functionality these structures are used in various applications such as filtration and separation advancedmaterials catalysts drug delivery and tissue engineering etc Suitability of nanofibrousstructure for any particular application is highly dependent on its structural characteristics suchas porosity In a nanofibrous structure nanofiber morphology pores formed between thenanofibers and the structure permeability are the most important variables that determine itsperformance In this study the air permeability of electrospun poly acrylonitrile nanoweb wasevaluated both by theory and experiment considering the pores formed between nanofibers Toachieve this poly acrylonitrile nanofibers were electrospun in different process and solutionconditions Collecting electrospun nanofibers on paper frame and aluminum foil provide propersamples for air permeability test and scanning electron microscope respectively By processingthe images obtained from scanning electron microscope the nanofibrous layer structurespecifications including nanofiber diameter and nanofiber diameter distribution number of poresformed between nanofibers pores area and pores size distribution were determined The effectof polymeric solution and electrospinning process variables on the nanofibrous web structuralspecifications and air permeability were assessed for further understanding of the relationshipbetween structure geometry and permeability In the theoretical section two geometrical models based on geometric probability and Poissonprocess in two dimensional space were presented to evaluate the size of the pores formedbetween the nanofibers Prediction of both models for the mean radius of pores formed betweenthe nanofibers were compared with the results of image processing and the results ofporosimetery Finally separate statistical models were presented to predict the air permeabilityof nanoweb using the data extracted from image processing and also using the electrospinningprocess data Both models can explain well the air permeability of nanoweb in the range ofmentioned variables The importance of first model is it ability to determine the air permeabilityof nanofibrous web using the data from SEM image processing with no need to do airpermeability test which is difficult and complex for tiny nanofibrous web samples Theimportance of second model is its ability to produce nanofibrous web with certain airpermeability
استاد راهنما :
علي اكبر قره آغاجي، علي زادهوش
استاد داور :
صديقه برهاني، مسعود لطفي، احمد محب
