پديد آورنده :
جعفرعلي پوده، مهدي
عنوان :
بررسي و مدل سازي ويسكوالاستيك رفتاركششي نخ نانوليفي پلي اكريلونيتريل (PAN)
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
تكنولوژي نساجي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده نساجي
صفحه شمار :
ده، ۸۳ص.: مصور، جدول، نمودار
استاد راهنما :
عبدالكريم حسيني
استاد مشاور :
افسانه ولي پوري
توصيفگر ها :
مدل ويسكوالاستيك , نخ نانوليفي , الكتروريسي دونازله , پلي- اكريلونيتريل (PAN)
استاد داور :
صديقه برهاني، مهدي حجازي
تاريخ ورود اطلاعات :
1397/07/14
چكيده فارسي :
چكيده 1 فصل اول مفاهيم و كليات 1 1هقذه 2 1 2 النتز ريسي 3 1 3 بزرسي بزخي ر ش اي ت ليذ خ ا ليفي 4 1 3 1 ماربزد تاب د ذ حيي بزداضت 5 1 3 2 استفاد اس ين مز د ار ت خالي 6 1 3 3 هنص ا در جوغ م ذ 6 1 3 4 استفاد اس د اسل با بار هخالف 7 9 1 1 5 ه اد يسن االستيل 9 1 6 طبق ب ذي تست اي هنا يني 01 1 7 تست ا ذاس گيزي خشش 01 1 7 1 ت جي خشش 11 1 7 2 اثز ت ص درج حزارت 21 1 7 3 باسيابي خشش 21 1 8 تست خشش 21 1 8 1 تست ت ص مز ص 31 1 9 هذل اي هنا يني ه رد استفاد بزاي ت جي رفتار يسن االستيل 31 هشت
چكيده انگليسي :
Investigation and modeling of viscoelastic tensile behavior of PAN nanofiber yarn Mehdi Jafarali Poudeh m jafar@tx iut ac ir 2018 08 10 Department of Textile Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Dr S Abdolkarim Hosseini hoseinir@cc iut ac irAbstractIn recent years nanotechnology has made remarkable progress In textile nanofiberproduction using electrospinning method and after that nanofiber yarn production are takeninto consideration Using various polymer kinds in electrospinning process and yarnproduction leads to production of special materials like nanofiber yarns drug deliverysystems composites and smart materials One of the important properties of nanofiberyarns is tensile and stress relaxation The aim of this research is production of nanofiberyarn via two nozzle electrospinning process from Polyacrylonitrile PAN as a polymerand evaluation and modeling of viscoelastic tensile behavior and stress relaxation ofnanofiber yarns First of all factors affecting electrospinning process including voltage feeding rate distance between two nozzles and electrospinning distance were optimized Secondly after optimization of conditions in electrospinning process the effects ofpolymer molecular weight twist and rate of elongation obtained from tensile streghtapparatus on stress strain modulus and work of rupture were investigated Moreover effects of twist and rate of elongation on stress relaxation of nanofiber yarn were carriedout Results of tensile tests showed that increase in molecular weight and twist values leadto an increase in stress and a decrease in strain values but rate of elongation variationsdidn t show any significant effects on stress values In addition Increase in twist and rateof elongation lead to a decrease in strain values but molecular weight variations didn tshow any significant effects on strain values It was concluded that an increase in twistvalues leads to an increase in modulus values but molecular weight and rate of elongationvariations didn t show any significant effects on modulus values Finally increase in twist molecular weight and rate of elongation values lead to an increase in work of rupturevalues Results of stress relaxation test showed that increase in twist and molecular weightvalues lead to a decrease in stress relaxation values Generalized Maxwell model andsimple Maxwell model were chosen to simulate tensile behavior and stress relaxation ofnanofiber yarn respectively Results of simulations showed an acceptable correlationbetween experimental and theoretical values So these two models are applicable forpredicting tensile and stress relaxation behavior of nanofiber yarns Keywords Viscoelastic model Nanofiber yarn Two nozzle electrospinning Polyacrylonitrile PAN
استاد راهنما :
عبدالكريم حسيني
استاد مشاور :
افسانه ولي پوري
استاد داور :
صديقه برهاني، مهدي حجازي
