رفتار سایشی نانوکامپوزیت های زمینه اپوکسی حاوی نانوصفحات گرافن اصلاح سطحی شده

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، گروه مهندسی مواد، دانشکده مهندسی شهید نیکبخت، دانشگاه سیستان و بلوچستان، زاهدان

2 استادیار، گروه مهندسی مواد، دانشکده مهندسی شهید نیکبخت، دانشگاه سیستان و بلوچستان، زاهدان

چکیده

در تحقیق حاضر، رفتار سایشی نانوکامپوزیت­های زمینه اپوکسی حاوی نانوصفحات گرافن مورد بررسی قرار گرفت. در گام نخست، سطح نانوصفحات گرافن با ترکیب سیلانی 3-آمینو پروپیل تری متوکسی سیلان (3-APTMS) اصلاح شد و در ادامه، تأثیر افزودن مقادیر مختلف (0، 05/0، 1/0، 3/0 و 5/0 درصد وزنی) نانوگرافن اصلاح سطحی شده و همچنین نقش عملیات اصلاح سطحی گرافن بر رفتار تریبولوژیکی نمونه­های نانوکامپوزیتی مورد مطالعه قرار گرفت. نتایج این تحقیق نشان داد که بهترین خواص سایشی در نمونه حاوی 3/0 درصد وزنی نانوگرافن اصلاح سطحی شده با کاهشی به ترتیب حدود 40 درصد و 68 درصد در ضریب اصطکاک و نرخ سایش در مقایسه با نمونه اپوکسی حاصل شد. همچنین نتایج این تحقیق نشان­دهنده این مورد بود که عملیات سطحی نانوصفحات گرافن با ترکیب سیلان می­تواند نقش بسیار موثری را در بهبود رفتار سایشی نانوکامپوزیت نهایی ایفا کند و در نمونه حاوی 3/0 درصد وزنی گرافن، عملیات اصلاح سطحی باعث کاهشی 48 درصدی نرخ سایش و 28 درصدی ضریب اصطکاک در مقایسه با نمونه اصلاح سطحی نشده شد. مکانیزم­های مربوطه در ارتباط با نقش نانوصفحات گرافن در بهبود رفتار سایشی زمینه­های اپوکسی پیشنهاد شد.

کلیدواژه‌ها

موضوعات


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