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تهیه و بررسی نانوالیاف الکتروریسی‌شده پلی وینیل الکل و نانوکریستال سلولز | ||
| تحقیقات علوم چوب و کاغذ ایران | ||
| مقاله 12، دوره 33، شماره 3 - شماره پیاپی 64، آذر 1397، صفحه 438-452 اصل مقاله (617.98 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijwpr.2018.121871.1475 | ||
| نویسندگان | ||
| هادی اشتری1؛ مهدی جنوبی2؛ مریم یوسف زاده3؛ یحیی همزه* 4 | ||
| 1دانشجوی دکتری، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی دانشگاه تهران، کرج، ایران | ||
| 2دانشیار، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی دانشگاه تهران، کرج، ایران | ||
| 3استادیار، دانشکده مهندسی نساجی، دانشگاه صنعتی امیرکبیر، تهران، ایران | ||
| 4استاد، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی دانشگاه تهران، کرج، ایران | ||
| چکیده | ||
| DOR:98.1000/1735-0913.1397.33.438.64.3.9.1586 در این پژوهش نانوالیاف کامپوزیتی پلی وینیل‌الکل (PVA) و نانوکریستال سلولزی (CNC) با فرایند الکتروریسی تهیه شدند. برای انحلال پلیمر PVA از آب یون‌زدایی شده استفاده شد و از بین غلظت‌های 4، 6، 8 و 10 درصد وزنی PVA، الیاف سالم در غلظت 8 درصد تولید شدند. برای تولید نانوالیاف با استحکام بیشتر، CNC در مقادیر 5/0، 1، 5/1 و 2 درصد بر اساس درصد وزنی PVA به محلول پلیمر افزوده شد و طراحی آزمایشات بر اساس روش تاگوچی برای رسیدن به قطر کمتر از 100 نانومتر، با متغیرهای ولتاژ الکتریکی، فاصله الکتروریسی، سرعت تغذیه محلول و غلظت CNC انجام شد. برای مقاوم-سازی نانو الیاف در برابر آب از گلوتارآلدهید (GA) به عنوان پیونددهندة عرضی استفاده شد. ویژگی‌های مرفولوژیکی و سطحی الیاف با میکروسکوپ‌های FESEM و SEM بررسی شد. برای بررسی برهم‌کنش‌های شیمیایی مواد از FTIR و از آزمون کرنش کششی برای بررسی خواص استحکامی کامپوزیت نانوالیاف استفاده شد. بر اساس نتایج، نانوالیاف با میانگین قطر 16 ± 87 نانومتر در غلظت 5/0 درصد CNC، به‌دست آمدند. در اثر افزودن نانوکریستال، مدول الاستیسیته نانوکامپوزیت‌ها افزایش و تخلخل آنها کاهش یافت. غوطه‌وری نانوکامپوزیت‌ها در محلول گلوتارآلدهید واکشیدگی نانوکامپوزیت‌ها را کاهش داده و مانع از انحلال و پراکندگی آنها در آب شد. | ||
| کلیدواژه‌ها | ||
| نانوکامپوزیت؛ نانوالیاف؛ نانوکریستال سلولز؛ پلی وینیل الکل؛ الکتروریسی | ||
| عنوان مقاله [English] | ||
| Preparation and Characterization of Electrospun Nanofiber of Poly (Vinyl Alcohol) and Cellulose Nanocrystals | ||
| نویسندگان [English] | ||
| Hadi Ashtari1؛ Mehdi Jonoobi2؛ Maryam Yousefzadeh3؛ Yahya Hamzeh4 | ||
| 1PhD student of Pulp and Paper Engineering, Department of Wood and Paper Sciences and Technology, Faculty of Natural Resources, University of Tehran, Iran | ||
| 2Associate Professor, Department of Wood and Paper Sciences and Technology, Faculty of Natural Resources, University of Tehran, Shahid Chamran Blvd., 31585-4314, Karaj, Iran | ||
| 3Department of Textile Engineering, Amirkabir University of Technology(AUT) | ||
| 4Professor, Department of Wood and Paper Sciences and Technology, Faculty of Natural Resources, University of Tehran, Shahid Chamran Blvd., Karaj, Iran | ||
| چکیده [English] | ||
| In this study Poly vinyl alcohol (PVA) and cellulose nanocrysrals (CNC) composite nanofibers were prepared by electrospinning process. To dissolve PVA, the deionized water was used due to environmental friendly of PVA. The design of experiments (DOE) was done by the Taguchi method using the Minitab for optimization of electrospinning. Polymer concentration was determined in 4, 6, 8 and 10% by solvent weight. Bead-free fibers were produced in 8% PVA concentration. CNC were added to polymer in 0.5, 1, 1.5 and 2% by PVA weight and DOE was applied for Needle to collector distance (cm), polymer concentration (%), polymer feed rate (mh/hr.) and applied voltage (Kv) were defined as variables, again to reach the thinnest fibers. Nanocomposites were soaked in GA 50% concentration for 48 hrs. to prevent nanocomposites decomposition. SEM and FESEM were used for morphological characterization. Diameter of the fibers was analyzed by Image software. Tensile, Modulus of Elasticity (MOE), Tension, Porosity, swelling and dissolving of nanocomposites were examined. Chemical reactions were traced by FTIR. Fibers with 87±16 nm in diameter were achieved in 0.5% CNC, 22 KV, 0.3 ml/hr. and 20 cm. Swelling and and solubility of nanocomposites were significantly improved by GA. FTIR spectra shows hemiacetal bounds produced during GA soaking. MOE and tensile were improved by CNC addition meanwhile tension and porosity were decreased. Same results were obtained for GA soaked nanocomposites. | ||
| کلیدواژه‌ها [English] | ||
| Nanocomposites, Polyvinyl Alcohol, Cellulose Nanocrystal, Nanofibers, Electrospinning | ||
| مراجع | ||
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