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تهیه چندسازه سلولز ـ ابریشم در فاز مایع با استفاده از یک حلال سبز | ||
نشریه جنگل و فرآورده های چوب | ||
مقاله 10، دوره 67، شماره 3، مهر 1393، صفحه 463-474 اصل مقاله (815.38 K) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22059/jfwp.2014.52090 | ||
نویسندگان | ||
علی عبدالخانی* 1؛ ابراهیم حجتی مروست2؛ علینقی کریمی3؛ سهیلا ایزدیار4 | ||
1دانشیار، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی دانشگاه تهران، کرج، ایران | ||
2کارشناس ارشد، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی دانشگاه تهران، کرج، ایران | ||
3استاد، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی دانشگاه تهران، کرج، ایران؛ و مؤسسه تحقیقاتی INTROP، دانشگاه پوترا، پوترا، مالزی | ||
4استادیار، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی دانشگاه تهران، کرج، ایران | ||
چکیده | ||
در این مطالعه امکان ساخت چندسازه سلولز ـ ابریشم در فاز مایع بررسی شد. به این منظور، مایع یونی BMIMCl در آزمایشگاه سنتز شد و برای انحلال بهکار رفت. پلیمرهای زیستی پس از انحلال و اختلاط در فاز مایع، درون پتری دیش ریخته و مایع یونی با متانول شستوشو داده شد. سپس، چندسازه سلولز ـ ابریشم به صورت فیلم تهیه شد و پس از خشک شدن، شفافیت، جذب آب، واکشیدگی ضخامت، نفوذپذیری بخار آب، پراش پرتو ایکس، و کشش استاتیک مربوط به فیلم ثبت شد. نتایج نشان داد که هر دو پلیمر بهخوبی در مایع یونی حل شدند و چندسازة سلولز ـ ابریشم در فاز مایع بهصورت همگن تهیه شد. جذب آب و واکشیدگی ضخامت و نفوذپذیری بخار آب چندسازه ساختهشده نسبت به فیلم سلولزی خالص افزایش و شفافیت آن اندکی کاهش یافت. سلولز I بر اثر انحلال و بازسازی به سلولز II تبدیل شد. مقاومت کششی و مدول یانگ چندسازه ساختهشده نسبت به فیلم سلولزی کاهش یافت. | ||
کلیدواژهها | ||
ابریشم؛ پراش پرتو ایکس؛ چندسازه؛ سلولز؛ کشش استاتیک؛ مایع یونی | ||
عنوان مقاله [English] | ||
Fabrication of Cellulose –Silk Composite in Liquid Phase with Green Solvent | ||
نویسندگان [English] | ||
Ali Abdulkhani1؛ Ebrahim Hojati Marvast2؛ Ali Naghi Karimi3؛ Soheila Izadyar4 | ||
1Associate Professor, Faculty of Natural Resources, University of Tehran, Karaj, I. R. Iran | ||
2M.Sc., Faculty of Natural Resources, University of Tehran, Karaj, I. R. Iran | ||
3Professor, Faculty of Natural Resources, University of Tehran, Karaj, I. R. Iran, and Laboratory of Biocomposite Technology, Institute of Tropical Forestry & Forest Products (INTROP), UniversityPutra, Malaysia, Putra,(UPM) | ||
چکیده [English] | ||
In this research, cellulose-silk composites production in liquid phase was studied. In this respect, BMIMCl ionic liquid was synthesized in the laboratory and was used for dissolution purpose. After dissolution of the biopolymers and mixing them in the liquid phase, obtained suspension was spread in a Petri dish. Then, the composite gel was washed with running methanol to remove the IL, cellulose and cellulose-silk composite films were prepared and after processing, their transparency, water absorption and thickness swelling, water vapor permeability and tensile strength were determined. Also, further characterization of structure was performed using XRD technique. Results showed that both polymers were appropriately dissolved in Ionic liquid and the cellulose-silk composite was prepared in the liquid phase homogeneously. Water absorption, thickness swelling and water vapor permeability of the composites were increased but its transparency decreased comparing to pure cellulosic film.Original cellulose (cellulose I) was deformed to Cellulose IIcrystalline structure, during dissolution and regeneration. Also, tensile strength and Young's modulus of the composite were less than cellulosic film although the strain at break point was increased. | ||
کلیدواژهها [English] | ||
Cellulose, Composite, Ionic liquid, Silk, Tensile, XRD | ||
مراجع | ||
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