بررسی تجربی خواص مکانیکی و الکتریکی کامپوزیت گرمانرم نیمه ‌زیست‌ تخریب‌پذیر کنف بافته شده/پلی‌پروپیلن

نوع مقاله : مقاله پژوهشی

نویسندگان

1 فارغ‌التحصیل دکتری، دانشکده مهندسی مکانیک، دانشگاه تربیت مدرس، تهران، ایران

2 فارغ‌التحصیل کارشناسی ارشد، دانشکده مهندسی مکانیک، دانشگاه تربیت مدرس، تهران، ایران

3 دانشیار، دانشکده مهندسی مکانیک، دانشگاه تربیت مدرس، تهران، ایران

10.22034/ijme.2023.412380.1820

چکیده

در این مقاله به فرآیند اصلاح سطح، ساخت و بررسی خواص مکانیکی و الکتریکی یک کامپوزیت نیمه زیست ‌تخریب‌پذیر تهیه شده از پلیمر پلی‌پروپیلن و پارچه الیاف کنف پرداخته شده است. تولید نمونه­های کامپوزیتی با استفاده انحلال پلیمر پلی‌پروپیلن در محلول زایلن و سپس ترکیب با پارچه الیاف تحت فشار و دمای پخت پرس گرم انجام شد. به منظور بهبود فصل مشترک الیاف و ماده زمینه و بهبود خواص مکانیکی نمونه‌های تولید شده، سطح پارچه الیاف کنف با استفاده از محلول 6 درصد سدیم هیدرواکسید به مدت 12 ساعت اصلاح سطح انجام شد. جهت تعیین خواص مکانیکی نمونه‌های تولید شده دو آزمون کشش و خمش سه نقطه انجام گرفت مدول الاستیک، تنش تسلیم، تنش نهایی، میزان حداکثر تغییر طول، و میزان چقرمگی از آزمون کشش اندازه‌گیری شدند و مورد تحلیل و بررسی قرار گرفتند استحکام خمشی و مدول الاستیک خمشی کامپوزیت از آزمون خمش به دست آمد. جهت تعیین و بررسی خواص الکتریکی کامپوزیت، آزمون ثابت دی‌الکتریک با استفاده از دستگاه تحلیلگر شبکه در باند x انجام شد بیشینه استحکام کششی و مدول یانگ کششی که در این پژوهش به دست آمد به ترتیب برابر با 8 مگاپاسکال و 6/1 گیگاپاسکال است. بیشینه ثابت دی‌­الکتریک و تانژانت تلفات نمونه‌­های تولیدی در باند x به ترتیب برابر با  48/3 و 24/0 است. درنهایت به منظور اعتبار سنجی نتایج به دست آمده در این تحقیق، نتایج آزمون‌های انجام شده با نتایج سایر مراجع در این زمینه مقایسه شده است.

کلیدواژه‌ها

عنوان مقاله [English]

Experimental investigation of mechanical and electrical properties of semi-biodegradable polypropylene/hemp woven thermoplastic composite

نویسندگان [English]

  • Reza Sarkhosh 1
  • Hamid Arabqomi 2
  • Amin Farrokhabadi 3
1 PhD Graduate, Department of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
2 MSc Graduate, Department of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
3 Associate Professor, Department of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
چکیده [English]

In this research, the process of surface modification, fabrication, and examination of the mechanical and electrical properties of a semi-biodegradable composite prepared from polypropylene and hemp fiber fabric has been discussed. Production of composite samples was done by dissolving polypropylene polymer in a xylene solution and then combining it with fiber fabric under pressure and temperature curing of a hot press. To improve the interface between the fibers and the matrix and to improve the mechanical properties of the produced samples, the surface of the hemp fiber fabric was modified using a 6% sodium hydroxide solution for 12 hours. To determine the mechanical properties of the produced samples, two tensile and three-point bending tests were performed. The elastic modulus, yield stress, ultimate stress, elongation, and toughness were measured from the tensile test and were analyzed and investigated. The bending of the composite was obtained from the bending test. To determine the electrical properties of the composite, the dielectric constant test was performed using a network analyzer in the x band. The maximum tensile strength and Young's modulus obtained in this research are 8 MPa and 1.6 GPa respectively. The maximum dielectric constant and loss tangent of the produced samples in the x-band is equal to 3.48 and 0.24, respectively. Finally, to validate the results obtained in this research, the results of the tests have been compared with the results of other authorities in this field.

کلیدواژه‌ها [English]

  • Semi-biodegradable Composite
  • Hemp Fiber Fabric
  • Polypropylene
  • Mechanical Properties
  • Dielectric Constant

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