میکروکامپوزیت‌های پلیمری فوق جاذب ضربه برپایه الیاف طبیعی-پلی استر

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشیار، دانشکده مهندسی مکانیک، دانشگاه صنعتی اصفهان، اصفهان، ایران

2 دانشجوی کارشناسی، دانشکده مهندسی مکانیک، دانشگاه صنعتی اصفهان، اصفهان، ایران

3 دانشجوی کارشناسی، دانشکده مهندسی کشاورزی، دانشگاه صنعتی اصفهان، اصفهان، ایران

چکیده

خواص تردی کامپوزیت‌های ترموست، منجر به محدودیت در کاربردهای وسیع‌تر این مواد شده است. در حالی که تردی این کامپوزیت‌ها با افزودن مواد تقویت‌کننده بحرانی تر هم می‌گردد. از طرفی استفاده از مواد بازگشت‌پذیر به طبیعت در استفاده از کامپوزیت‌ها به‌دلیل چالش‌های زیستی، مد نظر قرار گرفته شدهاست. با این وجود به‌دلیل عدم سازگاری مناسب فازهای تقویت‌کننده‌ی طبیعی با فاز پلیمر و افزودن الیاف طبیعی، باعث کاهش انرژی جذب و ضربه کامپوزیت می‌شود. این تحقیق به‌مواد و روش ساخت میکروکامپوزیت ترموست پلی‌استر تقویت‌شده با الیاف طبیعی کنف تا 20 درصد وزنی بطور لایه‌گذاری موازی، همراستا و متعامد می‌پردازد که با تقویت رزین پایه اولیه منجر به افزایش خواص ضربه‌پذیری پلیمر پایه تا 2400 درصد و قابلیت جذب انرژی نمونه‌ها با تا 40 درصد بهبودی می‌گردد. نتایج مشاهده شده مرتبط با افزایش مشارکت الیاف طبیعی در انتقال نیرو و جذب انرژی در راستای الیاف بوده که در حین فرآیند ساخت و افزایش نفوذ رزین بین لایه‌ها و الیاف کنف صورت گرفته که قابلیت تهیه کامپوزیت با درصد بالای الیاف نیز در گروه‌بندی این نوع کامپوزیت‌ها را مهیا می‌کند.

کلیدواژه‌ها


عنوان مقاله [English]

High energy absorbent Polyester/Natural Kenaf based polymer micro-composites

نویسندگان [English]

  • Mehdi Karevan 1
  • Mohammad Zeinali 2
  • Hadis Abbasi Dareh Bidi 3
1 Associate Professor, Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, Iran
2 BSc Student, Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, Iran
3 BSc Student, Department of Agricultural Engineering, Isfahan University of Technology, Isfahan, Iran
چکیده [English]

The brittleness behavior of thermosetting composites has resulted in limitations in their wider applications.  The said composites brittleness even becomes more critical upon the addition of reinforcing materials. Moreover, the use of materials recyclable to the environment in the use of composites has been considered to address challenges regarding bio-aspects, nevertheless die to the incompatibility of natural reinforcements with the polymer phase, the addition of natural fibers leads to the decrease in absorption energy and impact resistance of composites. The present study aims at the materials and the fabrication technique of polyester micro-composites reinforced with natural kenaf fiber up to 20 wt% laminated aligned or crossed perpendicularly, which has resulted in the increase in the impact resistance of the base polymer by 2400% and the energy absorption capability by 40% improvement.  The observed enhancement is correlated to the increase in contribution of the natural fiber phase in load transfer and energy absorption aligned the fiber direction during the fabrication process and the improvement in the resin penetration within the kenaf fibers which also leads to the penetration ability of resin within the layers of high fiber ratio in this classification of composites.

کلیدواژه‌ها [English]

  • Thermosetting Composites
  • Impact Energy
  • Drop Weight
  • Kenaf Fiber
  • High Energy Absorbent
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