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تاثیر نوع تیمار شیمیایی ماده چوبی بر خواص فیزیکی، مکانیکی و ریختشناسی چندسازه هیبریدی آرد چوب/ پلیپروپیلن | ||
| تحقیقات علوم چوب و کاغذ ایران | ||
| مقاله 11، دوره 30، شماره 1 - شماره پیاپی 50، فروردین 1394، صفحه 119-131 اصل مقاله (1004.53 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijwpr.2015.11899 | ||
| نویسندگان | ||
| مسیح مسعودی فر* 1؛ بابک نصرتی2؛ حمید رضا منصوری2؛ رحیم محبی گرگری3 | ||
| 1کارشناس ارشد، علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی، دانشگاه زابل | ||
| 2استادیار، دانشکده منابع طبیعی، عضو هیئت علمی، گروه علوم و صنایع چوب و کاغذ دانشگاه زابل | ||
| 3مربی، دانشکده منابع طبیعی، عضو هیئت علمی، گروه علوم و صنایع چوب و کاغذ دانشگاه زابل | ||
| چکیده | ||
| این تحقیق با هدف بررسی اثر تیمار شیمیایی ماده چوبی برخواص کاربردی چندسازه هیبریدی آرد چوب / پلیپروپیلن انجام شد. برای این منظور، ابتدا آرد چوب مخلوط پهنبرگان به طور جداگانه تحت تاثیر تیمار با اسید استیک، هیدروکسید سدیم و آب گرم قرار گرفتند و با نمونههای شاهد (تیمار نشده) مقایسه شدند. پس از انجام تیمار شیمیایی، آرد چوب و پلیپروپیلن با نسبت وزنی 50 به 50 و به همراه 3 phc ماده سازگارکننده در دستگاه مخلوط کن داخلی ترکیب شده و در نهایت چندسازه چوب پلاستیک با استفاده از روش قالبگیری تزریقی ساخته شد. سپس آزمونهای مکانیکی شامل مقاومت به خمش، کشش و ضربه و آزمونهای فیزیکی شامل جذب آب و واکشیدگی ضخامت 2 و 24 ساعت بر روی نمونهها مطابق با استاندارد (ASTM)انجام گرفت. همچنین به منظور بررسی ریختشناسی کامپوزیتها از میکروسکوپ الکترونی پویشی (SEM) استفاده گردید. نتایج حاصل از این بررسی نشان داد که مقاومتهای مکانیکی در اثر تیمار شیمیایی افزایش یافت و ویژگیهای فیزیکی مانند جذب آب و واکشیدگی ضخامت کاهش یافت. به طوری که بیشترین میزان مقاومت خمشی، کششی و مدول خمشی مربوط به تیمار قلیایی و بیشترین مدول کششی و مقاومت به ضربه مربوط به تیمار اسیدی میباشد. همچنین کمترین میزان جذب آب و واکشیدگی ضخامت مربوط به تیمار قلیایی بود. به منظور اطمینان از انجام تیمار شیمیایی، آزمونهای تبدیل فوریه مادون قرمز (FTIR) و درصد تغییرات وزن (WPG) بر روی آرد چوب انجام شد. | ||
| کلیدواژهها | ||
| تیمار شیمیایی؛ چوب پلاستیک؛ ویژگیهای مکانیکی؛ ریختشناسی؛ طیف سنجی مادون قرمز | ||
| عنوان مقاله [English] | ||
| The Effect Type of Chemical Treatment of Wood Material on Physical, Mechanical and Morphological Properties of Wood Flour / Polypropylene Hybrid Composite | ||
| نویسندگان [English] | ||
| masih masoudifar1؛ Babak Nosrati2؛ Hamid reza Mansori2؛ Rahim Mohebi gargari3 | ||
| 1M.Sc., Composite Products Engineering, University of Zabol, Iran | ||
| 2Assistant Professor, Faculty of Paper and wood Sciences Technology, Department of Natural Resources, University of Zabol, Iran | ||
| 3Teacher, Faculty of Paper and wood Sciences Technology, Department of Natural Resources University of Zabol, Iran | ||
| چکیده [English] | ||
| This study aimed to investigate the effect of chemical treatment of wood material on functional properties of wood flour / polypropylene hybrid composite. For this reason, first of all, mixed hardwood were separately treated by acetic acid, sodium hydroxide and hot water and were compared with control (untreated) samples. After chemical treatment, wood flour and polypropylene with weight ratio of 50 to 50 and 3 phc of compatibilizer combines in the internal mixer and at last the WPC composite were made using injection molding. Then mechanical tests included bending resistance, tension and impact and physical examination, including water absorption and thickness swelling after 2 and 24 hours was performed on specimens according to (ASTM) standard. Also to study the morphology of the composites, scanning electron microscopy (SEM) was used. The results of this study showed that by chemical treatment the mechanical strength increased and physical properties such as water absorption and thickness swelling decreased. So that the highest flexural strength, tensile and flexural modulus is related to alkali treatment and the highest tensile modulus and impact resistance is related to the acid treatment. Also the lowest water absorption and thickness swelling was related to the alkali treatment. In order to ensure chemical treatments, Fourier transform infrared (FTIR) and weight percent gain (WPG) was used on wood flour. | ||
| کلیدواژهها [English] | ||
| chemical treatment, wood plastic, MECHANICAL PROPERTIES, Morphology, infrared spectroscopy | ||
| مراجع | ||
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