بررسی تجربی اثر نوع‌ تقویت‌کننده نانوساختار بر خواص مکانیکی و سایشی نانوکامپوزیت‌های زمینه اپوکسی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 آزمایشگاه مکانیک مواد مرکب، دانشکده مهندسی مکانیک و مکاترونیک، دانشگاه صنعتی شاهرود، شاهرود، ایران.

2 صنعتی شاهرود

چکیده

در این مقاله اثر استفاده از سه نوع مختلف تقویت‌کننده‌های نانوساختار، بر خواص مکانیکی و سایشی نانوکامپوزیت‌ها مطالعه‌ شده‌است. نانولوله‌کربنی، نانواکسیدگرافن و نانورس با درصدهای وزنی برابر و با روش‌های یکسان در شرایط محیطی مشابه به رزین اپوکسی افزوده شد. جهت پراکندگی یکنواخت نانوساختارها در زمینه اپوکسی، از همزن مکانیکی به‌همراه فراصوت استفاده گردید. پس از انجام فرآیند گاززدایی، نمونه‌های آزمون کشش و سایش مطابق استانداردهای مربوطه ساخته شدند. از هر جنس نانوکامپوزیت‌، سه نمونه تهیه و تحت آزمون قرار گرفت. مدول یانگ، استحکام کششی نهایی، کرنش در نقطه شکست و چقرمگی نمونه‌ها، از منحنی‌ تنش–کرنش و با استفاده از آزمون کشش استخراج شد. آزمون سایش خشک در بارهای 20، 60 و 100 نیوتن با استفاده از یک دستگاه پین روی دیسک در دمای اتاق مورد بررسی قرار گرفت. نتایج حاکی از آن بود که در نمونه‌ی حاوی نانولوله‌کربنی، بیشترین تنش قابل تحمل % 16 و کرنش در لحظه شکست % 27 نسبت به اپوکسی خالص افزایش دارد. همچنین کامپوزیت‌های اپوکسی/ نانولوله‌کربنی و اپوکسی/ نانورس بالاترین مقاومت در برابر سایش را در مقایسه با سایر نمونه‌ها از خود نشان دادند، به‌طوری‌که در نمونه‌ی حاوی نانورس، 60 درصد کاهش در مقدار نرخ سایش نسبت به نمونه اپوکسی خالص، مشاهده‌شد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

An experimental investigation of the effect of the type of nanostructured reinforcements on the mechanical and tribological properties of epoxy based nanocomposites

نویسندگان [English]

  • Sedigheh Ranjkesh Adarmanabadi 1
  • Seyed Mahdi Hossein Farrash 1
  • Mohammad Jafari 2
1 Mechanics of Composite Materials Laboratory (MCM Lab.), Faculty of Mechanical and Mechatronics Engineering, Shahrood University of Technology, Shahrood, Iran.
2 Mechanics of Composite Materials Laboratory (MCM Lab.), Faculty of Mechanical and Mechatronics Engineering, Shahrood University of Technology, Shahrood, Iran.
چکیده [English]

In this paper, the effect of three different types of nanostructured reinforcements on the mechanical and tribological properties of nanocomposites are investigated. Carbon nanotube, nanoclay and nanographene oxide with equal weight percentages and under similar environmental conditions are added into the epoxy resin. To achieve uniformly dispersed nanoparticles within the epoxy matrix, mechanical stirring with ultra-sonication is utilized. After degassing process, tensile and wear test specimens were made according to the relative standards. Three samples of each nanocomposite were prepared and tested. Young's modulus, ultimate tensile strength, strain at break point and toughness of the specimens were extracted from the stress-strain curve using the tensile test. Dry wear test was performed at 20N, 60N and 100N loads using a disk on pin testing machine at room temperature. The results showed that in the sample containing carbon nanotubes, the ultimate stress increased by 16% and the strain at the break point increased by 27% compared to pure epoxy. Also, carbon nanotube/epoxy and nanoclay/epoxy nanocomposites showed the highest wear resistance compared to other samples, so that in the sample containing nanoclay reinforcement, a 60% decrease in the amount of wear rate was observed compared to the pure epoxy sample.

کلیدواژه‌ها [English]

  • Nanostructured reinforcement
  • Nanocomposite
  • epoxy
  • Mechanical Properties
  • tribological behavior
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