8289

7687

كارشناسي ارشد

الياف

اصفهان: دانشگاه صنعتي اصفهان، دانشكده نساجي

1392

پانزده،74ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

حسين توانايي

تقي خياميان

27/9/92

فرزانه علي حسيني، حسن قاضي عسگر

1396/11/14

كتابنامه

مهندسي نساجي

ID7687

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Fabrication of wool keratin Nanoparticles through Electrospraying Farzaneh Ebrahimgol f ebrahimgol@tx iut ac ir Date of Submission Department of Textile Engineering Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiProf H Tavanai tavanai@cc iut ac irProf T Khayamian taghi@cc iut ac irAbstractWool keratin is a protein with biodegradability and biocompatibility properties These merits have attracted theattention of researchers This natural polymer in powder form has found applications in hygiene cosmetics filtration tissue engineering scaffolds and controlled drug release In submicron size range and especially innano dimensions the properties and behavior of keratin like any other material changes drastically Up to thepresent time nanoparticles of polysaccharides some synthetic polymers and proteins such as albumin gelatin fibroin sericin and feather keratin have been produced Among the processes capable of producingnanoparticles emulsification dissolution and electrospray electrospray enjoys advantages such as productionof smaller more regular and spherical particles In order to produce nanoparticles the intended polymer must bedissolved in a or a number of suitable solvents The solution is then fed to an electrospray set up Duringelectrospraying the initial droplets formed at the exit of the nozzle are continuously broken up as a result of thecoulombic explosions until reaching the collector of the electrospraying set up The size of the particles reachingthe collector can be as low a few nanometers This research aimed at producing wool keratin nanoparticlethrough electrospraying First wool keratin was recovered from wool fibers by dissolving it in Mercaptoethanol To prepare the electrospray solution the recovered keratin was dissolved in formic acid To find the propersolvent a number of solvents were tried and formic acid was found to be the most suitable Apart from theproduction of keratin nanoparticles this research involved an investigation on the effect of importantelectrospray conditions such as polymer concentration feed rate voltage and nozzle collector distance on theaverage particle size of the electrosprayed nanoparticles As conditions of electrospray a range of kV cm ml h was chosen for voltage nozzle collector distance and feed rate respectively These ranges were chosen by trial and error so that proper keratin nanoparticles could be produces The resultsshowed that the proper concentration of keratin in formic acid for the electrospraying keratin nanoparticle wasabout w v Higher concentrations led to production big particle sticking to each other As far aselectrospraying conditions are concerned decreasing feed rate increasing nozzle collector distance andincreasing voltage lead to lower average particle size The smallest average keratin particle size produced inthis research was nm The smallest particle size seen was nm Key words Wool keratin Electrospray Nanoparticle Particle size

حسين توانايي

تقي خياميان

فرزانه علي حسيني، حسن قاضي عسگر