علوم و فناوری کامپوزیت

اثر اصلاح سطحی نانوصفحات گرافن بر خواص ضربه سرعت بالای کامپوزیت‌های زمینه اپوکسی تقویت‌شده با الیاف بازالت

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد، مهندسی و علم مواد، دانشگاه صنعتی خواجه ‌نصیر الدین طوسی، تهران، ایران

2 استادیار، مهندسی و علم مواد، دانشگاه صنعتی خواجه نصیرالدین طوسی، تهران، ایران

3 دانشیار، مهندسی و علم مواد، دانشگاه صنعتی خواجه نصیرالدین طوسی، تهران، ایران

چکیده

در این پژوهش اثر اصلاح سطحی نانوصفحات گرافن با عامل سیلان بر روی رفتار ضربه سرعت بالای نانوکامپوزیت‌های اپوکسی- الیاف بازالت به صورت تجربی مورد بررسی قرار گرفت. نانوصفحات گرافن اصلاح نشده و اصلاح شده به میزان 0، 0.3 و 0.5درصد وزنی برای تقویت نمونه‌های نانوکامپوزیتی اپوکسی- الیاف بازالت استفاده شدند و در ادامه اصلاح سطحی نانوصفحات گرافن با استفاده از طیف‌سنجی مادون قرمز مورد بررسی قرار گرفت و به اثبات رسید. نتایج حاصل از آزمون ضربه سرعت بالا نشان داد که استفاده از نانوصفحات گرافن اصلاح‌شده با عامل سیلان تأثیر بسزایی بر عملکرد مکانیکی نانوکامپوزیت‌های زمینه پلیمری تقویت‌شده با الیاف بازالت داشته است. در نمونه حاوی 0.3 درصد وزنی نانوصفحات گرافن، سرعت حد بالستیک و انرژی جذب‌شده به ترتیب به میزان 11 و 23 درصد در مقایسه با نمونه بدون نانوصفحات گرافن بهبود یافت، ولی در نانوکامپوزیت حاوی 0.5 درصد وزنی نانوصفحات گرافن به دلیل آگلومره شدن نانوذرات، عملکرد مکانیکی افت کرد. مطالعات میکروسکوپ الکترونی نشان‌دهنده این مطلب بود که افزایش انتقال بار بین الیاف تقویت‌کننده و زمینه پلیمری کامپوزیت ناشی از توزیع نانوصفحات گرافن تأثیر بخصوصی در بهبود رفتار مکانیکی کامپوزیت‌ها داشته است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of Surface Modification of Graphene Nanoplatelets on the High Velocity Impact Behavior of Basalt Fibers Reinforced Polymer-Based Composites

نویسندگان [English]

  • Elahe Kazemi khasrag 1
  • Hossein Siadati 2
  • reza Eslami-Farsani 3

1 Faculty of Materials Science and Engineering, K. N. Toosi University of Technology, Tehran, Iran

2 Faculty of Materials Science and Engineering, K. N. Toosi University of Technology, Tehran, Iran

3 Faculty of Materials Science and Engineering, K. N. Toosi University of Technology, Tehran, Iran

چکیده [English]

In this study, the effect of surface modified graphene nanoplatelets (GNPs) by silane on the high velocity impact behavior of basalt fiber epoxy nanocomposites was evaluated experimentally. The pristine and silane modified GNPs of 0, 0.3 and 0.5 weight percentages were employed for reinforcing basalt fiber- epoxy nanocomposites and the surface modification procedure of GNPs were confirmed using Fourier transform infrared (FT-IR) spectroscopy. Results from the high velocity impact tests proved that utilizing silane modified GNPs had a considerable influence on the mechanical performance of the basalt fiber reinforced polymer nanocomposites. in the 0.3 wt.% GNPs sample, the impact limit velocity and absorbed energy respectively improved by 11 and 23 %, Compared with the 0 wt.% GNPs sample,but in the 0.5 wt.% sample, agglomeration of GNPs caused reduction in the mechanical properties. Electron microscopy investigations revealed that load transfer between the polymer matrix and the reinforcing fibers was greatly affected by the addition of GNPs in enhancing the mechanical response of the nanocomposites.

کلیدواژه‌ها [English]

  • Basalt fibers
  • Graphene nanoplatelets
  • High velocity impact
  • Nanocomposite
  • Surface modification
مراجع
 
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علوم و فناوری کامپوزیت
دوره 5، شماره 1
خرداد 1397
صفحه 109-116
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هم رسانی
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