علوم و فناوری کامپوزیت

اثر مخرب آب دریا، آب اسیدی و آب بازی بر رفتار مکانیکی چسب های نانوکامپوزیتی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد، دانشکده مهندسی مکان یک ، دانشگاه علم و صنعت ایران، تهران.

2 دانشیار، دانشکده مهندسی مکان یک، دانشگاه علم و صنعت ایران، تهران.

چکیده

هدف از این تحقیق مقایسه تخریب چسب های نانوکامپوزیتی تحت شرایط محیطی مختلف می‌باشد. برای این منظور نمونه‌های حجمی چسب های نانوکامپوزیتی با افزودن درصدهای وزنی مختلف 0، 0.1، 0.3 و 0.5 از نانولوله های کربنی چند جداره به یک چسب از نوع اپوکسی ساخته شدند. سپس نمونه‌ها در سه نوع آب، شامل آب دریا (خلیج فارس)، آب دو بار یون زدایی شده و سپس اسیدی شده با اسید صنعتی هیدرو کلریک (HCl) و آب دو بار یون زدایی شده و سپس بازی شده با باز صنعتی سدیم هیدروکسید (NaOH) به مدت 360 ساعت غوطه‌ور شدند‌. نتایج آزمایشگاهی نشان داد، افزودن نانو لوله های کربنی باعث کاهش میزان جذب آب در چسب و به تبع آن بهبود خواص مکانیکی گردید اگرجه این اثر تقویت کنندگی وابسته به شرایط محیطی نیز بود. نانوکامپوزیت های حاوی 0.1 درصد نانو لوله کربنی کمترین میزان جذب آب و بیشترین میزان خواص مکانیکی را در شرایط مخرب محیطی مختلف از خود نشان دادند. از میان انواع مختلف شرایط مخرب، آب اسیدی بیشترین میزان نفوذ و بیشترین اثر مخرب را بر روی خواص مکانیکی رزین داشت. در آب دریا به علت وجود اکسید فلزات قلیایی نفوذ رطوبت نسبت به حالت اسیدی کم تر گردید و در نهایت کمترین میزان مربوط به جذب آب و اثر مخرب آن بر روی رزین مربوط به آب بازی بود.

کلیدواژه‌ها

عنوان مقاله [English]

Deleterious Effects of Seawater, acidic water and Alkali water on Mechanical Properties of Nanocomposite adhesives

نویسندگان [English]

  • Zohreh Shamsaei 1
  • Hadi Khoramishad 2

1 School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran.

2 School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran.

چکیده [English]

This paper aims to compare the detrimental effects of different environmental conditions including seawater, acidic water and alkali water on the mechanical properties of nanocomposites. Nanocomposite adhesive specimens were fabricated by the inclusion of different weight percentages (0, 0.1, 0.3 and 0.5) of multi-walled carbon nanotubes (MWCNTs) into an epoxy adhesive. Then, the specimens were immersed in three types of water including seawater (from Persian Gulf), de-ionized water acidified with industrial hydrochloric acid (HCl) and de-ionized water alkalized with industrial sodium hydroxide (NaOH) for 360 hours. The experimental results showed that adding MWCNTs reduced the water uptake and consequently improved the mechanical properties of the adhesive. However, this improving effect depended on the environmental conditions. The nanocomposite adhesive specimen containing 0.1 wt% MWCNTs presented the lowest water uptake and the highest mechanical properties for different environmental conditions. Amongst different environmental conditions, the acidic water imposed the most deleterious effect with the highest water uptake. In seawater, the water ingress was lower than acidic water due to the existence of alkali metal oxides. Finally, the lowest water ingress and destructive effect was found to be for alkali water.

کلیدواژه‌ها [English]

  • Nanocomposite adhesive
  • Environmental degradation
  • Water uptake
  • Residual strength
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علوم و فناوری کامپوزیت
دوره 9، شماره 1
خرداد 1401
صفحه 1936-1927
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هم رسانی
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