شماره راهنما :
1090 دكتري
پديد آورنده :
نوروزي، نسرين
عنوان :
تاثير نانوذرات روي اكسيد اصلاح شده با پلي(وينيل الكل)، سيتريك اسيد و ويتامين B1، روي ساختار و خواص فيزيكي- شيميايي نانوكامپوزيت‌هاي پلي‌كاپرولاكتون
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده شيمي
صفحه شمار :
شانزده، ۱۰۹ص.: مصور، جدول، نمودار
استاد راهنما :
شادپور ملك‌پور
توصيفگر ها :
روي اكسيد , امواج فراصوت , پلي‌كاپرولاكتون , نانوكامپوزيت , اصلاح‌كننده‌هاي زيست ايمن
استاد داور :
ايرج محمدپوربلترك، عبدالحسين دباغ، حسين توكل
تاريخ ورود اطلاعات :
1396/08/30
كد ايرانداك :
ID1090 دكتري
چكيده انگليسي :
Effect of modified ZnO nanoparticles with poly vinyl alcohol citric acid and vitamin B1 on the structure and physico chemical properties of polycaprolactone nanocomposites Nasrin Nouruzi n nouruzi@ch iut ac ir nasrinnouruzi89@gmail com Joune 2 2017 Department of Chemistry Isfahan University of Technology Isfahan 84156 83111 I R Iran Degree Ph D Language FarsiSupervisor Prof Shadpour Mallakpour Email mallak@cc iut ac ir mallak777@yahoo com mallakpour84@alumni ufl eduAdvisor Prof Kazem KaramiDepartment Graduate Coordinator Dr Alireza Najafi Isfahan University of Technology 84156 83111 Isfahan Iran Abstract In this thesis zinc oxide nanoparticles NPs were used for the preparation of polycaprolactone PCL based nanocomposites NCs by solvent casting and ultrasonic assisted method In the first step theNP surfaces were modified with biosafe molecules like poly vinyl alcohol citric acid and vitamin B1 Thenon covalent interactions of the NPs with the organic molecules were responsible for their successfulmodifications The NPs after the modifications displayed uniform size distributions and better dispersion inthe organic solvent According the thermogravimetric analysis of the modified NPs 80 90 wt of theorganic molecule were loaded on the ZnO NP surfaces The functionalized ZnO NPs with different weightpercentages 2 4 and 6 wt were exploited as nanofillers for fabrication of PCL based NC films underultrasonic method The fabricated films showed enhanced mechanical strength ultraviolet visible absorptionand wettability compared to the pure PCL Transition electron microscopic images of the NCs verified theirsteady dispersion and no sign of agglomerations in the matrix In vitro bioactivity test of the NCs byimmersing them in the simulated body fluid solution showed that the ZnO incorporation can drasticallyincrease the hydroxy apatite growth on the films and decrease the solution pH because of the solutionhydroxyl waster for the hydroxyl apatite formation Between all the nanocomposites PCL ZnO VB1 NCsshowed the highest bioactivity and dispersion in organic media By thermogravimetric analysis of the NCs itwas noticed that the NPs can promote the thermal degradation of the NCs therefore the thermal stability ofthe nanocomposites is decreased Keywords Polycaprolactone Zinc oxide Wettability Bioactivity test Ultrasonic irradiation
استاد راهنما :
شادپور ملك‌پور
استاد داور :
ايرج محمدپوربلترك، عبدالحسين دباغ، حسين توكل
