5148

4822

كارشناسي ارشد

تكنولوژي نساجي

اصفهان: دانشگاه صنعتي اصفهان،دانشكده نساجي

1388

پانزده،100ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

علي اكبر قره آقاجي،علي زادهوش

محمد حسين غياثي

21/2/89

عبدالكريم حسين راوندي،صديقه برهاني

مهندسي نساجي

ID4822

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Isfahan University of Technology Department of Textile Engineering Study on Some Mechanical Physical and Morphological Properties of Composite anofiber Yarn Produced from PA and Wool anoparticles Arezoo Rajabimehr a rajabimehr@tx iut ac ir March 2010 Department of Textile Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Persian Supervisor s ame and Email address Dr A A Gharehaghaji aghaji@aut ac ir Dr A Zadhoosh zadhoush@cc iut ac ir Abstract Producing the yarn from nanofibers has received great attention in recent years and several techniques have been developed in this concern While composite nanofibres are mainly produced from CNT there is not any reported work about production of nano fibrous composite yarn with nanopowder of natural fibers such as wool so far This study aims at improving the hygroscopic properties of nylon 6 nanofibers by introducing wool fiber nanoparticles WFNP into PA nanofibres and spinning composite yarns with various contents of WFNP Also some physical mechanical and morphological properties of composite nanofibers and yarns were evaluated Initially wool fibers were converted into powders using ball milling technique under optimum conditions The solutions containing 12 W W polymer and 0 7 WFNP in formic acid were prepared WFNP were dispersed to disrupt possible agglomerates using an ultrasonic homogenizer These solutions were electrospun to produce composite nanofibre yarns containing WFNP via optimization of electrospinning parameters Effect of nanoparticle concentration on morphology and average diameter of nanofibers were studied by manipulation of Scanning Electron Microscope SEM micrographs Transmission Electron Microscopy TEM was applied to evaluate the quality of dispersion as well Fourier Transform Infrared FTIR results showed that no probable structural change has occurred in polymer formic acid and nanoparticles composition This study shows that increasing the concentration of nanoparticles led to increase on composite nanofibers diameter Assessment of moisture regain of composite yarns revealed the effect of WFNP content i e moisture absorption of PA nanofibres is improved by introducing the WFNP as hydrophilic sector Results shows that WFNP content in the composite PA nanofibre yarn has a slight detrimental effect on the mechanical properties of composite yarns such as tenacity breaking elongation work of rupture and elastic modulus Key Words wool fiber nanoparticles nylon 6 nanofibers composite naofibre yarn mechanical properties morphology ultrasonic process hygroscopy

علي اكبر قره آقاجي،علي زادهوش

محمد حسين غياثي

عبدالكريم حسين راوندي،صديقه برهاني