تهیه چندسازه سلولز ـ ابریشم در فاز مایع با استفاده از یک حلال سبز

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشیار، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی دانشگاه تهران، کرج، ایران

2 کارشناس ارشد، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی دانشگاه تهران، کرج، ایران

3 استاد، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی دانشگاه تهران، کرج، ایران؛ و مؤسسه تحقیقاتی INTROP، دانشگاه پوترا، پوترا، مالزی

4 استادیار، 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

عنوان مقاله [English]

Fabrication of Cellulose –Silk Composite in Liquid Phase with Green Solvent

نویسندگان [English]

  • Ali Abdulkhani 1
  • Ebrahim Hojati Marvast 2
  • Ali Naghi Karimi 3
  • Soheila Izadyar 4
1 Associate Professor, Faculty of Natural Resources, University of Tehran, Karaj, I. R. Iran
2 M.Sc., Faculty of Natural Resources, University of Tehran, Karaj, I. R. Iran
3 Professor, 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)
4
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

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