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بررسی امکان ساخت تخته خرده چوب از ساقه شاهدانه | ||
| تحقیقات علوم چوب و کاغذ ایران | ||
| مقاله 7، دوره 33، شماره 1 - شماره پیاپی 62، فروردین 1397، صفحه 63-75 اصل مقاله (841.36 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijwpr.2018.120845.1463 | ||
| نویسنده | ||
| مسعود رضا حبیبی | ||
| استادیار پژوهش، بخش تحقیقات علوم چوب و فرآوردههای آن، مؤسسه تحقیقات جنگلها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران | ||
| چکیده | ||
| هدف از این تحقیق، کاربرد ساقه شاهدانه در تولید تختهخرده چوب بوده است. لذا از ساقه شاهدانه و چوب اکالیپتوس با نسبتهای متفاوت شامل 100% و . % ، 50% ، 50% و 0 % و 100% و با استفاده از مقدار مصرف چسب 10 و 12 درصد (بر مبنای وزن خشک خرده چوب) و دو زمان پرس 3 و 4 دقیقه، اقدام به ساخت تختهخرده چوب گردید. ویژگیهای فیزیکی و مکانیکی تختهها شامل جذب آب و واکشیدگی ضخامت پس از 2 و 24 ساعت غوطهوری در آب، مقاومت چسبندگی داخلی تختهها، مقاومت خمشی و مدول الاستیسیته بر طبق استاندارد EN اندازهگیری و کلیه دادهها مورد تجزیه و تحلیل آماری قرار گرفتند. نتایج نشان داد که افزایش ذرات ساقه شاهدانه منجر به بهبود ویژگیهای خمشی (مدول الاستیسیته و مقاومت خمشی) تختهخرده چوب گردید. همچنین افزایش ذرات ساقه شاهدانه منجر به تضعیف مقاومت چسبندگی داخلی و خواص فیزیکی تختهخرده چوب (واکشیدگی ضخامت پس از 2 و 24 ساعت غوطهوری در آب شد. با افزایش زمان پرس، مدول الاستیسیته و واکشیدگی ضخامت پس از 24 ساعت غوطهوری در آب تختهخرده چوب بهبود یافت. با مقایسه خواص مکانیکی تختههای تولید شده با استاندارد ایران، مشخص گردید که با استفاده از ساقه شاهدانه به طور خالص و یا مخلوط، و زمان پرس 3 دقیقه و مقدار مصرف چسب 8 درصد، میتوان تختههای با ویژگی مکانیکی استاندارد تولید نمود، اگرچه ویژگیهای فیزیکی تختهها مقادیر استاندارد را تامین نکرد، که علت این امر عدم میتواند ناشی از عدم استفاده از عوامل محدود کننده جذب آب (پارافین) باشد. | ||
| کلیدواژهها | ||
| ساقه شاهدانه؛ اکالیپتوس؛ تخته خرده چوب؛ مقاومت خمشی؛ چسبندگی داخلی | ||
| عنوان مقاله [English] | ||
| Investigation the possibility of particleboard manufacturing using Hemp stalk | ||
| نویسندگان [English] | ||
| Masoudreza Habibi | ||
| Assistant Prof., Wood and Forest Products Research Division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran | ||
| چکیده [English] | ||
| The purpose of this study was to use of Hemp stalks in particleboard production. Mixtures of Hemp stalk and Eucalyptus wood at the ratios of 0:100, 50:50, 100:0 were used. Also two resin content of 8 and 10% (based on oven dry particle) and 2 press times of 3 and 4 minutes were employed for the production of laboratory particleboard. Physical and mechanical properties including thickness swelling after 2 and 24 hours soaking in water, modulus of rapture, modulus of elasticity and internal bonding were measured data were statistically analyzed. It was observed that the increase in Hemp stalk particles in the mixture resulted in increasing of bending properties (bending strength and modulus of elasticity) and thickness swelling after 2 and 24 hours water soaking. Also the results showed that increase in Hemp stalk particles in the mixture resulted in reduction of internal bonding. As expected, physical and mechanical properties of particleboard improved with increasing resin content. Modulus of elasticity and thickness swelling after 24 hours water soaking were improved with increasing of press time. In general, comparing the produced board mechanical properties with standard of Iran requirements, the board produced using 100% and 50% Hemp stalk, 8% resin content and 3 minutes press time showed that optimal properties. Although the physical properties of the boards did not meet the standard values, the reason for this could not be due to the lack of use of paraffin. | ||
| کلیدواژهها [English] | ||
| Hemp stalk, Eucalyptus, Particleboard, Bending strength, Internal bonding | ||
| مراجع | ||
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