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مقایسه اثر آرد و زغال پوسته گردو بر ویژگیهای کاربردی چندسازههای چوب – پلاستیک | ||
| تحقیقات علوم چوب و کاغذ ایران | ||
| مقاله 4، دوره 37، شماره 2 - شماره پیاپی 79، تیر 1401، صفحه 128-140 اصل مقاله (843.58 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijwpr.2022.356960.1704 | ||
| نویسندگان | ||
| میررضا موسوی1؛ اصغر تابعی* 2؛ مصطفی معدنی پور2؛ محمد فارسی3 | ||
| 1دانشجوی دکتری تخصصی، گروه علوم و صنایع چوب و کاغذ، واحد آستارا، دانشگاه آزاد اسلامی، آستارا، ایران | ||
| 2استادیار، گروه علوم و صنایع چوب و کاغذ، واحد آستارا، دانشگاه آزاد اسلامی، آستارا، ایران | ||
| 3دانشیار، گروه علوم و صنایع چوب و کاغذ، واحد ساری، دانشگاه آزاد اسلامی، ساری، ایران | ||
| چکیده | ||
| در این پژوهش، اثر آرد و زغال پوسته گردو بر ویژگیهای کاربردی چندسازههای چوب پلاستیک حاصل از آن بررسی شد. برای این منظور، آرد و زغال پوسته گردو در سه سطح 20، 30 و 40 درصد، با پلیاتیلن سنگین توسط دستگاه مخلوط‌کن داخلی Brabender طی فرایند اختلاط مذاب مخلوط و بعد نمونههای آزمونی استاندارد با استفاده از روش قالب‌گیری تزریقی ساخته شدند. خواص مکانیکی شامل مقاومت کششی و خمشی، مدول کششی و خمشی و مقاومت به ضربه فاقدار اندازهگیری شد. خواص فیزیکی شامل جذب آب و واکشیدگی ضخامت 24 ساعته ارزیابی و تصاویر میکروسکوپ الکترونی نیز بررسی گردید. نتایج نشان داد که مقاومت خمشی و مقاومت به ضربه فاقدار چندسازه حاوی 40 درصد آرد پوسته گردو از نمونههای حاوی 40 درصد زغال پوسته گردو بالاتر بود. همچنین با افزایش آرد و زغال پوسته گردو از 20 به 30 درصد، مقاومت خمشی به‌ترتیب 3/3 و 1/6 درصد افزایش یافت و با افزایش آرد و زغال پوسته گردو از 20 به 40 درصد، مدول خمشی به‌ترتیب 9/51 و 8/63 درصد افزایش یافت. دیگر نتایج حاصل از مقاومت مکانیکی حکایت از آن دارد که با افزایش زغال پوسته گردو از 20 به 40 درصد، مقاومت و مدول کششی به‌ترتیب 9/22 و 7/109 درصد افزایش یافت و با افزایش آرد و زغال پوسته گردو از 20 به 40 درصد، مقاومت به ضربه فاقدار به‌ترتیب 6/6 و 4/5 درصد کاهش یافت. نتایج حاصل از ویژگیهای فیزیکی نشان داد که با افزایش آرد و زغال پوسته گردو از 20 به 40 درصد، جذب آب 24 ساعت به‌ترتیب 2/19 و 4/8 درصد و واکشیدگی ضخامت 24 ساعت به‌ترتیب 6/53 و 7/46 درصد کاهش یافت. | ||
| کلیدواژه‌ها | ||
| "آرد و زغال پوسته گردو"؛ "چندسازه چوب پلاستیک"؛ "مقاومت کششی"؛ "مدول خمشی" | ||
| عنوان مقاله [English] | ||
| Comparison of the effect of walnut shell and charcoal flour on the characteristics of wood-plastic composites | ||
| نویسندگان [English] | ||
| Mir Reza Mousavi1؛ Asghar Tabei2؛ Mostafa Madanipour2؛ Mohammad Farsi3 | ||
| 1Ph.D Student, , Department of Wood and Paper Science and Technology, Astara Branch, Islamic Azad University, Astara, Iran | ||
| 2Assistant Professor, Department of Wood and Paper Science and Technology, Astara Branch, Islamic Azad University, Astara, Iran | ||
| 3Associated Professor, Department of Wood and Paper Science and Technology, Sari Branch, Islamic Azad University, Sari,, Iran | ||
| چکیده [English] | ||
| In this study, the effect of walnut shell and charcoal flour on the applied characteristics of the resulting plastic composites was investigated. For this purpose, walnut shell and charcoal flour in three levels of 20, 30 and 40% were mixed with high density polyethylene using Brabender internal mixer during the melt mixing process, then standard test samples were made by injection molding method. Mechanical properties including tensile and flexural strength, tensile and flexural modulus and impact strength were measured. Physical properties including water absorption and thickness swelling after 24 hours immersion were evaluated and scanning electron microscopy images were also examined. The results showed that the flexural strength and impact strength of the wood plastic composite containing 40% walnut shell flour were higher than the samples containing 40% charcoal flour. Also, by increasing the walnut shell and charcoal flour from 20 to 30%, the flexural strength increased by 3.3% and 6.1%, respectively, and by increasing the walnut shell and charcoal flour from 20 to 40%, the flexural modulus increased by 51.9% and 63.8%, respectively. Other results of mechanical strength indicate that with increasing walnut shell charcoal from 20 to 40%, tensile strength and modulus increased to 22.9 and 109.7%, respectively, and with increasing walnut shell and charcoal flour from 20 to 40%, the impact strength decreased by 6.6 and 5.4%, respectively. The results of physical properties showed that with increasing walnut shell and charcoal flour from 20 to 40%, water absorption for 24 hours decreased by 19.2 and 8.4%, respectively, and thickness swelling by 24 hours decreased by 53.6 and 46.7%, respectively. | ||
| کلیدواژه‌ها [English] | ||
| "Walnut shell and charcoal flour", "wood plastic composite", "Tensile strength", "Flexural modulus" | ||
| مراجع | ||
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