نویسندگان
1 گروه مواد، واحد نجف آباد ، دانشگاه آزاد اسلامی، نجف آباد، ایران
2 دانشگاه صنعتی اصفهان، دانشکده مهندسی مواد، اصفهان، ایران
3 گروه شیمی ، واحد نجف آباد، دانشگاه آزاد اسلامی، نجف آباد، ایران
چکیده
در این پژوهش، عملکرد ترمیم شوندگی میکروترک‌ها توسط میکروکپسول‌های حاوی روغن بزرک در پوشش پلی‌آنیلین به عنوان پلیمر رسانا بررسی گردید. پلیمریزاسیون درجای رزین اوره- فرمالدئید جهت تهیه کپسول روغن بزرک انجام پذیرفت. کپسول‌های سنتز شده توسط میکروسکوپ الکترونی روبشی مورد مطالعه قرار گرفت و همچنین میزان روغن آن‌ها %75 تعیین شد. آزمون (FTIR) نیز برای اثبات موفقیت میکروکپسوله‌کردن انجام شد. فرآیند پوشش‌دهی پلی آنیلین با استفاده از روش الکتروشیمیایی گالوانواستاتیک در چگالی جریان‌های 7/0، 9/0، 1، 2 و 3 آمپر بر دسی‌متر مربع انجام شد. عملکرد مقاومت به خوردگی پوشش‌های کامپوزیتی حاوی میکروکپسول‌ها، توسط آزمون پلاریزاسیون پتانسیوداینامیک در محلول 5/3 درصد و غوطه‌وری در محلول خورنده 5 درصد کلریدسدیم مورد بررسی قرار گرفت. نتایج حاصل نشانگر خواص خودترمیم‌کنندگی و مقاومت به خوردگی بسیار خوب نمونه پوشش داده شده با چگالی جریان 1 آمپر بر دسی‌متر مربع کامپوزیت شده با 01/0 درصد وزنی میکروکپسول بود و راندمان حفاظت آن %95 تعیین شد.
کلیدواژه‌ها
عنوان مقاله [English]
The corrosion resistance of the composite coatings Polyaniline/Urea-formaldehyde microcapsules containing healing agent
نویسندگان [English]
- Iman Badpeyma 1
- Ali Ashrafi 2
- Mojtaba Nasr Esfahani 3
1 Department of Materials, Najafabad Branch, Islamic Azad Universiy, Najaf Abad, Iran
2 Isfahan University of Technology, Department of Material Engineering, Isfahan, Iran
3 Department of Chemistry, Najaf Abad Branch, slamic Azad Universiy, Najaf Abad, Iran
چکیده [English]
In this study the healing performance of micro-cracks by microcapsules containing linseed oil in the coating of polyaniline as conducting polymer were investigated. The In situ polymerization in the urea - formaldehyde resin was done to produce linseed oil capsules. The synthesized capsules were studied by Scanning Electron Microscope and contents were determined 75% of their oil. The (FTIR) test was performed to verify the success of being microcapsule. The process of Polyaniline coating was performed by using the electrochemical galvanostatic method in 0.7, 0.9, 1, 2 and 3 A/dm2 current densities. The performance of corrosion resistance of the composite coating containing microcapsules was studied by potentiodynamic polarization test in the 3.5 percent solution and immersion in the 5 percent sodium chloride corrosive solution. The results showed that sample coated with a current density of 1 A/dm2 composite with 0/01 weight of microcapsules had very good self-healing and corrosion resistance properties and Efficiency of 95% was determined to protect it.
کلیدواژه‌ها [English]
- Microcapsules
- Linseed oil
- Polyaniline
- In situ polymerization
- Self-healing
- Galvanostatic
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