16011

1643 دكتري

دكتري

شيمي نساجي

اصفهان : دانشگاه صنعتي اصفهان

1399

هفت، 116ص.: مصور، جدول، نمودار

صديقه برهاني، علي زادهوش

محمد ديناري

سعيد نوري خراساني، اميرحسين نوارچيان، حسين فشندي

1399/08/26

كتابنامه

مهندسي نساجي

مهندسي نساجي

1399/08/28

2651517

1 عناوين چكيده 1 فصل اول مقدمه و بيان مساله 2 مقدمه 2 1 1 مكانيك شكست مواد پليمري 3 1 2 كامپوزيت هاي خودترميم شونده 5 1 3 مفهوم ترميم شوندگي پليمرها 6 1 4 سازوكار خودترميم شوندگي 7 1 5 روش هاي مختلف خودترميم شوندگي 8 1 6 خودترميم شوندگي ذاتي 9 خودترميم شوندگي با استفاده از عوامل خارجي 9 1 7 توليد نانوالياف با استفاده از دستگاه الكتروريسي 41 1 8 عوامل تاثيرگذار بر روي الكتروريسي 61 1 9 عوامل مربوط به محلول پليمري 61 عوامل مربوط به محلول فرآيند توليد 81 عوامل محيطي 81 1 01 نانوالياف پوسته مغزي با استفاده از الكتروريسي هم محور 91 1 11 توليد نانوالياف پوسته مغزي با استفاده از يك نازل 02 1 21 مروري بر تحقيقات پيشين و روش انجام پژوهش 72 استفاده از نانوالياف جهت بهبود خواص مكانيكي كامپوزيت هاي پليمري 82 استفاده از نانوالياف جهت خودترميم شوندگي بسترهاي پليمري 92 1 31 بيان مساله و هدف پژوهش 73 هفت

Fabrication characterization and investigation of self healing performance of core shell nanofiber containing epoxy and mercaptan in epoxy matrix Sayed Ali Mir Mohammad Sadeghi a mir@tx iut ac ir Date of Submission Department of Textile Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree Ph D Language Persian Supervisor Dr Sedighe Borhani sborhani@iut ac ir Supervisor Dr Ali Zadhoush zadhoush@iut ac ir Abstract In this research nanofibers were used as container of healing agent Therefore PAN solution withconcentration of 10 11 12 and 13 wt were prepared In order to prepare polymer blend solution of PAN epoxy to produce core shell nanofibers by a single nozzle the epoxy resin was directly added to each PANsolution in a way that the weight ratio of the epoxy resin and PAN were 0 2 1 and 1 5 Similar to the PAN epoxy solution mercaptan was added to prepare PAN solutions Core shell nanofibers containing epoxy andmercaptan as healing agent and its hardener were electrospun using single nozzle electrospinning Extractionresults showed that maximum loading was obtained for epoxy or mercaptan to PAN weight ratio of 1 FESEMimages illustrated that electrospun nanofibers were uniform without beads TEM images confirmed theformation of electrospun core shell nanofibers The absence of any chemical reactopn between epoxy resin ormercaptan with PAN was showed by FTIR analysis TGA is conducted in order to strudy the thermal stabilityof core shell nanofibers Also due to increasing temperature during TGA analysis the weight change of core shell nanofibers could be used to calculate the amount of epoxy resin and mercaptan stored in electrospunnanofibers Dynamic and isothermal DSC analysis were performed with the aim of monitoring the self healingprocess of the system Also self healing interaction was studied by mechanical properties of electrospunnanofibers Three point bending tests were performed in order to study the self healing performance of hybridmat The composites containing hybrid nanofibers was decreased only about 6 of normalized modulus after4 bending cycles which could demonstrate the effect of hybrid mat to heal the damaged composite DynamicDSC analysis were conducted immediately after each three point bending cycle of composite containing hybridcore shell nanofibers mat The exothermic peak centered about 64 C showed self healing reaction of healingagent Extraction method FTIR analysis and three point bending test were performed in order to study thestability of core materials The results of loading content for epoxy and mercaptan were 19 wt and 25 7 wt respectively After 8 months about 0 9 wt for epoxy resin and 1 3 wt for mercaptan were reduced According to FTIR results 8 months later the intensity ratio of C O C to C N has reduced about 5 In thesame time 23 of the peak intensity ratio of SH to C N has decreased Three point bending tests wereperformed for similar specimens as produced 4 months and 8 months later The results showed that nanofibersare considered as a suitable container to encapsulate healing agent for a long time Keywords Single nozzle electrospinning Core shell nanofibers Epoxy resin Self healing

صديقه برهاني، علي زادهوش

محمد ديناري

سعيد نوري خراساني، اميرحسين نوارچيان، حسين فشندي