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تاثیر اصلاح شیمیایی آرد چوب بر ویژگی‌های نانوکامپوزیت‌های هیبریدی پلی‌پروپیلن – نانو سیلیس | ||
| تحقیقات علوم چوب و کاغذ ایران | ||
| مقاله 12، دوره 30، شماره 4 - شماره پیاپی 53، دی 1394، صفحه 674-689 اصل مقاله (1.2 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijwpr.2015.101481 | ||
| نویسندگان | ||
| سعید اسمعیلی مقدم* 1؛ محمد شمسیان2؛ علی بیات کشکولی3؛ بهزاد کرد4 | ||
| 1باشگاه پژوهشگران جوان و نخبگان، واحد چالوس، دانشگاه آزاد اسلامی، چالوس، تهران، ایران | ||
| 2استادیار گروه علوم و صنایع چوب و کاغذ، دانشگاه زابل، زابل، ایران. | ||
| 3دانشیار گروه علوم و صنایع چوب و کاغذ، دانشگاه زابل، زابل، ایران. | ||
| 4استادیار علوم و صنایع چوب و کاغذ، گروه سلولزی و بسته بندی، پژوهشکده شیمی و پتروشیمی، پژوهشگاه استاندارد، کرج، ایران | ||
| چکیده | ||
| این تحقیق، با هدف بررسی تاثیر تیمار شیمیایی آرد چوب بر ویژگی‌های فیزیکی، مکانیکی و ریخت‌شناسی نانوکامپوزیت‌های هیبریدی پلی‌پروپیلن– نانو سیلیس انجام گردید. برای این منظور، آرد چوب با بنزیل کلرید و هیدروکسید سدیم، تیمار شیمیایی شدند. جهت اطمینان از انجام اصلاح شیمیایی، آزمون طیف سنجی تبدیل فوریه مادون قرمز (FTIR) بر روی آرد چوب اصلاح شده و بدون تیمار انجام شد. آرد چوب با نسبت وزنی 60 درصد با پلی‌پروپیلن به همراه 4 درصد جفت‌کننده انیدرید مالئیک پلی-پروپیلنی در داخل دستگاه اکسترودر مخلوط شد. همچنین نانو سیلیس با نسبت‌های وزنی 0، 1، 3 و 5 درصد به عنوان پرکننده استفاده شد. نمونه‌های آزمونی با استفاده از روش قالب‌گیری تزریقی ساخته شدند. سپس آزمون‌های مکانیکی شامل مقاومت و مدول خمشی و آزمون‌های فیزیکی شامل جذب آب و واکشیدگی ضخامت بر روی نمونه‌ها مطابق با استاندارد (ASTM)انجام گرفت. همچنین به منظور بررسی ریخت‌شناسی نانوکامپوزیت‌ها از میکروسکوپ الکترونی پویشی (SEM) استفاده گردید. نتایج نشان داد که در اثر تیمار شیمیایی، مقاومت خمشی و مدول خمشی افزایش یافتند در حالی که جذب آب و واکشیدگی ضخامت کاهش یافتند. با افزایش نانو ذرات سیلیس تا 3 درصد مقاومت‌های مکانیکی افزایش یافتند اما افزودن مقادیر بیشتر نانو ذرات مقاومت‌های مکانیکی را کاهش داد. با افزایش نانو ذرات سیلیس تا 5 درصد جذب آب نانوکامپوزیت‌ها افزایش یافت اما واکشیدگی ضخامت کاهش یافت. نتایج میکروسکوپ الکترونی پویشی حاکی از بهبود فصل مشترک بین پرکننده و ماتریس در اثر تیمار شیمیایی و پراکنش مناسب نانو ذرات سیلیس در سطح 3 درصد بود. | ||
| کلیدواژه‌ها | ||
| واژه‌های کلیدی: نانوکامپوزیت‌های هیبریدی؛ اصلاح شیمیایی؛ نانو سیلیس؛ ریخت‌شناسی؛ ثبات ابعاد | ||
| عنوان مقاله [English] | ||
| Effect of chemical modification of wood flour on properties of polypropylene-nano SiO2 hybrid nanocomposite | ||
| نویسندگان [English] | ||
| Saeid Ismaeilimoghadam1؛ Mohammad Shamsian2؛ Ali Bayat Kashkoli3؛ Behzad Kord4 | ||
| 1Young Researchers and Elite Club, Chalous Branch, Islamic Azad University, Chalous, Tehran, Iran. | ||
| 2Assistant professor in Science & Wood Industry & Paper Group, Zabol University, Zabol, Iran. | ||
| 3Associate professor, in Science & Wood Industry & Paper Group, Zabol University, zabol, Iran | ||
| 4Department of Paper and Packaging Technology, Faculty of Chemistry and Petrochemical Engineering, Standard Research Institute (SRI), Karaj, Iran | ||
| چکیده [English] | ||
| This research with aim of evaluation the effect of chemical treatment of wood flour on physical, mechanical and morphological properties of polypropylene-nano SiO2 hybrid nanocomposite were done. For this purpose, wood flour with sodium hydroxide and benzyl chloride to chemically treatment. For ensure the chemical treatment, Fourier transform infrared (FTIR) spectroscopy tests was done on the treated and untreated wood flour. Wood flour at 60% weight ratio with polypropylene with 4% maleic anhydrate grafted polypropylene coupling agent in extrusion were mixed. Also Nano SiO2 with 0, 1, 3 and 5% as filler was used. The sample specimen were manufactured by using injection molding techniques. Then mechanical tests such as bending resistance and modulus and physical tests such as water absorption and thickness swelling according to the ASTM standard was done on the samples. Also for morphological investigation on the Nano composites from Scanning Electron Microscopy (SEM) was used. Results showed that the bending resistance and modulus increased with effect of chemical treatment but water absorption and thickness swelling decreased. With increase of Nano SiO2 to 3% the mechanical properties increased but adding further amount Nano particles reduced the mechanical properties. With increase of SiO2 Nano particles to 5% the water absorption in Nano composites were increased, but thickness swelling was decrease. The results of SEM showed an improvement in interface between filler and matrix with effect of chemical treatment Also transmittance of Nano SiO2 to 3% levels was good. | ||
| کلیدواژه‌ها [English] | ||
| Key words: Hybrid nanocomposite, chemical modification, Nano SiO2, Morphology, Dimensional stability | ||
| مراجع | ||
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