ثبات ابعادی و خصوصیات مکانیکی کامپوزیت چوب/پلی‌پروپیلن حاوی داست سنباده‌زنی MDF

نوع مقاله : Original Articles

نویسندگان

1 دانشیار گروه صنایع چوب، دانشکده مهندسی عمران، دانشگاه تربیت دبیر شهید رجایی، تهران، ایران

2 دانشجوی کارشناسی ارشد صنایع چوب، دانشکده مهندسی عمران، دانشگاه تربیت دبیر شهید رجایی، تهران، ایران

چکیده

در این مطالعه امکان استفاده از نرمه سنباده‌زنی MDF (داست) در ساخت چند‌سازه چوب‌پلاستیک مورد بررسی قرار گرفت. نمونه‌ها با نسبت‌های 40، 50 و 60 درصد نرمه سنباده‌زنی به همراه 2 درصد ماده جفت کننده (MAPP) براساس وزن خشک مواد ساخته  شده و سپس با نمونه‌های شاهد که از پودرچوب ساخته شده بودند، مقایسه گردیدند. تمامی خصوصیات فیزیکی و مکانیکی بر طبق استاندارد اروپا (EN) اندازه‌گیری شدند. نتایج نشان داد که نرمه سنباده‌زنی تاثیر معنی‌داری بر خصوصیات مورد بررسی داشته، به طوری که بالاترین میزان خصوصیات مکانیکی و ثبات ابعادی در تخته‌های ساخته شده با 40 درصد نرمه سنباده زنی مشاهده گردید. علت بهبود خصوصیات فیزیکی و مکانیکی در چند‌سازه چوب‌پلاستیک ساخته شده با نرمه سنباده‌زنی به دلیل وجود چسب اوره فرم‌آلدئید در فرآیند تولید MDF بود. نتایج بیانگر این بود که با استفاده از نرمه سنباده‌زنی در ساخت چوب‌پلاستیک می‌توان از نسبت‌های بالاتر ماده پرکننده در تولید آن بهره برد.

کلیدواژه‌ها


عنوان مقاله [English]

Dimensional Stability and Mechanical Properties of Wood/Polypropylene Composite Containing MDF Sanding Dust

نویسندگان [English]

  • Mohammad Ghofrani 1
  • Donya Ansari Movahed, 2
  • Mohammad Hasan Payan 2
  • Saeed Khojasteh Khosro 2
1 Associate Professor, Department of Wood Science and Technology, Faculty of Civil Engineering, University of Shahid Rajaee Teacher Training, Tehran, Iran.
2 MSc. Student of Wood Science and Technology, Faculty of Civil Engineering, University of Shahid Rajaee Teacher Training, Tehran, Iran.
چکیده [English]

The present study investigated the use of MDF sanding dust in the manufacture of wood polymer composites. Specimens made with 40%, 50% and 60% sanding dust and 2% coupling agent (dry wt) were compared with control specimens. All physical and mechanical properties were determined according to European norms. The results showed that sanding dust had a significant effect on all properties. The best mechanical properties and dimensional stability were found in boards composed of 40% sanding dust. The improvement in the physical and mechanical properties of composites containing sanding dust was related to the presence of urea formaldehyde resin from the MDF process in the dust. The results indicate that the use of sanding dust as a filler produced good quality composites that perform better than composites made with wood flour.

کلیدواژه‌ها [English]

  • Keywords:Wood Polymer composite
  • Sanding dust
  • Wood flour
  • Polypropylene
  • Urea formaldehyde resin
  • MDF
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