پديد آورنده :
صفدري، عليرضا
عنوان :
خودترميم شوندگي پوشش اپوكسي با استفاده از مزوكپسول¬هاي پوسته-مغزي(رزين اپوكسي-عامل پخت آميني)
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
صنايع پليمر
محل تحصيل :
اصفهان : دانشگاه صنعتي اصفهان
صفحه شمار :
چهارده، 66ص.: مصور، جدول، نمودار
استاد راهنما :
سعيد نوري خراساني
استاد مشاور :
رسول اسمعيلي نيسياني
توصيفگر ها :
خودترميم شوندگي , مزوكپسول هاي پوسته-مغزي , پوشش , الكترواسپري امولسيوني , رزين اپوكسي
استاد داور :
روح الله باقري، احمد اسدي نژاد
تاريخ ورود اطلاعات :
1398/06/04
رشته تحصيلي :
مهندسي شيمي
تاريخ ويرايش اطلاعات :
1398/06/04
چكيده انگليسي :
67AbstractIn this study emulsion electrospray was used to store the repair agent inside themesocapsules The self healing coating was made by placing the core shell mesocapsuleswith restorative and curing agents on the epoxy coating The shell used in the structure ofthe mesocapsules was poly co acrylonitrile Examination of mesocapsules made usingScanning Electron Microscopy revealed that mesocapsules were produced under optimumconditions of electrospray with favorable morphology and size The mean diameter of thesemesocapsules for epoxy core and curing agent was 870 and 776 nm respectively Examination of the structure of mesocapsules produced by transmission electron microscopyfor both types of core in the core confirmed the core shell structure Fourier Transformspectroscopy results confirmed the physical appearance of the shell with two types of coresside by side and no chemical reaction between the shell and the core Thermal core resultsalso confirmed the presence of two components in the produced mesocapsules Thermaldegradation results of core shell mesocapsules showed that thermal degradation of core shellmesocapsules with curing agent and curing agent is something between the degradation ofeach component that this type of thermal degradation behavior is a reason for successfulencapsulation of the core into the crust Mechanical tests of adhesion flexural strength andgloss were used to investigate the effect of adding mesocapsules on the mechanicalproperties of the coating The results of the adhesion test showed that by addingmesocapsules at higher percentages the adhesion of the coating was reduced compared tothe control coating However the adhesion of 1 by weight of mesocapsules will decreaseby 17 Also flexural strength test results showed that addition of mesocapsules woulddecrease the bending percentage of coatings and decreased 21 in 1 by weight ofmesocapsules The gloss test results showed a decrease in gloss due to the addition ofmesocapsules due to surface roughness Corrosion evaluation was performed qualitativelyby salt fog test Prevention of corrosion of metal substrate and self healing of coatings wasdetermined in 1 wt sample and corrosion was observed in higher percentages ofmesocapsules The self healing evaluation was performed quantitatively using the Tafel andEIS tests and the self healing efficiency for the coatings was calculated with the self healing coefficient of coverage containing 99 wt of the core shell mesocapsules equal to99 and the diagrams for each the tests showed the superiority of 1 by weight ofmesocapsules over 5 and 10 coatings Keywords self healing coating emulsion electro spray epoxy resin core shell mesocapsules
استاد راهنما :
سعيد نوري خراساني
استاد مشاور :
رسول اسمعيلي نيسياني
استاد داور :
روح الله باقري، احمد اسدي نژاد
