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ارزیابی پانل ساندویچی ساخته شده از ضایعات برگ نخل خرما و تخته سه لایه | ||
| تحقیقات علوم چوب و کاغذ ایران | ||
| مقاله 5، دوره 38، شماره 1 - شماره پیاپی 82، فروردین 1402، صفحه 48-58 اصل مقاله (760.74 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijwpr.2022.358156.1715 | ||
| نویسندگان | ||
| علی اکبر یزدی میمند1؛ علی خاکی2؛ محمد غفرانی* 3 | ||
| 1دانشآموخته کارشناسی ارشد کامپوزیتهای لیگنوسلولزی، دانشگاه تربیت دبیر شهید رجایی، تهران، ایران | ||
| 2استادیار، عضو هیئتعلمی دانشگاه فنی و حرفهای، تهران، ایران | ||
| 3استاد، گروه کامپوزیتهای لیگنوسلولزی، دانشگاه تربیت دبیر شهید رجایی، تهران، ایران. | ||
| چکیده | ||
| پانلهای ساندویچی یکی از انواع سازههای کامپوزیتی هستند که در مقیاس وسیعی مصرف دارند. این تحقیق با هدف بررسی تاثیر سه نوع چسب اوره فرمالدهید (UF)، ملامین فرمالدهید (MF) و ترکیب اوره فرمالدهید + ملامین فرمالدهید (UF+MF) و دو دانسیته لایه مغزی (400 و 500 کیلوگرم بر مترمکعب) بر روی خواص فیزیکی و مکانیکی پانلهای ساندویچی ساخته شده از برگ نخل انجام شده است. دما، فشار و زمان پرس برای تمامی پانلهای ساخته شده به ترتیب 175 درجه سانتی گراد، 35 کیلوگرم بر سانتیمتر مربع و 9 دقیقه بود. ضخامت نهایی تمامی پانلها یکسان و برابر 25 میلیمتر بود. بررسی ویژگیهای فیزیکی و مکانیکی شامل؛ جذب آب، واکشیدگی ضخامت، مقاومت خمشی، مدول الاستیسیته خمشی، مقاومت به ضربه و چسبندگی داخلی روی نمونهها انجام گردید. نتایج نشان داد که بین مقادیر تیمارهای مختلف اختلاف معنیدار وجود دارد. خواص فیزیکی (بجز واکشیدگی ضخامت) و خواص مکانیکی در دانسیته 500 کیلوگرم بر مترمکعب، بهبود یافت. استفاده از چسب MF و UF+MF به طور قابل ملاحظهای خواص فیزیکی و مکانیکی پانلهای ساندویجی را بهبود بخشید. | ||
| کلیدواژهها | ||
| اوره فرمالدهید؛ برگ نخل؛ پانلهای ساندویچی؛ خواص مکانیکی؛ ملامین فرمالدهید | ||
| عنوان مقاله [English] | ||
| Evaluation of sandwich panels from palm leaves waste and plywood | ||
| نویسندگان [English] | ||
| Aliakbar Yazdi meymand1؛ Ali Khaki2؛ mohammad ghofrani3 | ||
| 1M.Sc. Graduated in lignocellulosic composites, Shahid Rajaee Teacher Training University (SRTTU), Tehran, Iran | ||
| 2Assistant Professor, Technical and Vocational University Tehran, Iran | ||
| 3Professor, Department of lignocellulosic composites, Shahid Rajaee Teacher Training University (SRTTU), Tehran, Iran. | ||
| چکیده [English] | ||
| Sandwich panels are one of the most advanced forms of composite structures that are widely used. The objective of this study was to investigate the effect of three types of resin: urea formaldehyde (UF), melamine formaldehyde (MF) and the combination of urea formaldehyde + melamine formaldehyde (UF + MF) two core layer densities (400 and 500 kg/m3) on physical and mechanical properties of sandwich panels made of palm leaves waste. Pressure temperature, pressure and time for all panels were 175 °C, 35 kg /cm2 and 9 minutes, respectively. The final thickness of all panels was the same and equal to 25 mm. Physical and mechanical properties include; Water absorption (WA), thickness swelling (TS), modulus of rupture (MOR), modulus of elasticity (MOE), impact bending strength (IBS) and internal bonding (IB) were performed on the samples. The results showed that there was a significant (p<0.05) difference between the values of different treatments at the level of 95%. Physical properties (except thickness swelling) and mechanical properties with a density of 500 kg/m3 improved. The use of MF and UF + MF resins significantly improved the physical and mechanical properties of sandwich panels due to its high adhesive quality. | ||
| کلیدواژهها [English] | ||
| Urea formaldehyde, palm leaves, sandwich panels, mechanical properties, melamine formaldehyde | ||
| مراجع | ||
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