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تیمار آرد پوسته برنج با اسید استیک جایگزین سازگارکننده MAPE در چند سازه پلی اتیلن سنگین/آرد پوسته برنج | ||
| تحقیقات علوم چوب و کاغذ ایران | ||
| مقاله 9، دوره 30، شماره 3 - شماره پیاپی 52، مهر 1394، صفحه 443-456 اصل مقاله (474.37 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijwpr.2015.13000 | ||
| نویسنده | ||
| عبدالله نجفی* | ||
| استادیار، گروه علوم و صنایع چوب و کاغذ، دانشگاه آزاد اسلامی واحد چالوس | ||
| چکیده | ||
| در این تحقیق، تاثیر تیمار شیمایی آرد پوسته برنج با اسید استیک بر خواص فیزیکی و مکانیکی چند سازه آرد پوسته برنج/ پلی اتیلن سنگین مورد بررسی قرار گرفت. به این منظور آرد پوسته برنج با اندازه مش 40+ /60 - انتخاب شد. ابتدا آرد خشک شده در محلول هیدروکسید سدیم غوطه ور و سپس با اسید استیک گلاسیال تحت تیمار شیمیایی قرار گرفت. پودر پلی اتیلن سنگین با آرد تیمار شده خشک به نسبت 60 درصد وزن پرکننده در دستگاه مخلوط کن داخلی با هم ترکیب شدند. بعد از آسیاب شدن مخلوط بی شکل حاصل و به کمک دستگاه تزریق، چند سازه هایی از آنها ساخته شد. چند سازه های بدون تیمار آرد پوسته برنج /پلی اتیلن سنگین همراه با سازگار کننده مالیک انیدرید جفت شده با پلی اتیلن سنگین و نیز فاقد سازگار کننده به همین روش تولید و خواص فیزیکی، مکانیکی سه نوع چند سازه تولید شده مورد بررسی و مقایسه قرار گرفت. تحلیل دینامیکی، مکانیکی-حرارتی نمونه‌ها در دامنه دمایی 50- تا C˚150 + انجام و مدول ذخیره و مدول اتلاف اندازه‌گیری شد. جهت اطمینان از انجام تیمار شیمیایی از طیف سنجی مادون قرمز استفاده شده است. نتایج طیف سنجی نشان داد که شدت جذب گروه عاملی هیدروکسیل در ناحیه نزدیک به cm-13436 و نیز گروه کربونیل در محدودهcm-1 1741 کاهش یافته است. نتایج آزمون ها نیز نشان داد که تیمار آرد پوسته برنج با اسید استیک گلاسیال تمامی خواص مورد مطالعه را در چند سازه بهبود بخشید. | ||
| کلیدواژه‌ها | ||
| تیمار شیمیایی؛ آرد پوسته برنج؛ پلی اتیلن سنگین؛ اسید استیک گلاسیال | ||
| عنوان مقاله [English] | ||
| Chemical Treatment of Rice Husk with Acetic Acid substitute for MAPE Compatibilizer in Rice Husk/High Density Poly Ethylene Composites | ||
| نویسندگان [English] | ||
| Abdollah Najafi | ||
| Assistant Prof., Department of Wood Science and Technology Islamic Azad University Chaloos Branch, Chaloos, Iran Chaloos, Iran, | ||
| چکیده [English] | ||
| In this study, chemical treatments of rice husk flour on physical and mechanical properties of rice husk flour / high density polyethylene composites were studied. Rice husk was milled and its flour through the sieve of 60 meshes was selected for using. Initially, dried rice husk flour was subjected to chemical treatment with acetic acid and then, was mixed with powder of high density polyethylene at weight ratio of 60% filler loading in an internal mixer. After milling of mixed matreials, samples of composites were made by injection moulding method. Physical and mechanical properties of treated rice husk flour / high density polyethylene composites were compared to untreated composite and a composite including a PE-g-MA coupling agant (MAPE) that were produced in the same method. Dynamic Mechanical-Thermal Analyze (DMTA) of specimens in the temperature range of -50 to +150 ◦C were taken and storage modulus and loss modulus were measured. FT-IR spectra of chemical treatments of rice flour husks were also investigated to what extent changes in the functional groups being studied. Results of FT-IR indicated that the chemical treatment of rice husk led to a change of OH group absorbance on 3436 cm-1 and a peak in the region of 1741 cm-1 related to functional group of C=O. Results of tests also indicated that all of properties in composites including of treated rice husk flour with acetic acid were improved. | ||
| کلیدواژه‌ها [English] | ||
| chemical treatment, HDPE, Rice husk, MECHANICAL PROPERTIES, physical properties | ||
| مراجع | ||
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