شیمى کاربردى روز

شیمى کاربردى روز

سنتز و شناسایی هیدروژل های کوپلیمری متخلخل 2-هیدروکسی اتیل متاکریلات و N-وینیل پیرولیدون از طریق امولسیون فاز داخلی بالا

نوع مقاله : مقاله علمی پژوهشی

نویسندگان
گروه شیمی ، دانشگاه پیام نور، تهران، ایران
چکیده
مواد پلیمری متخلخل هایپ، به لحاظ کاربردهای زیست شناختی مواد، دارای اهمیت بوده و توجه بسیاری را بخود جلب نموده است . در این تحقیق هیدروژل کوپلیمری HEMA_CO_NVP در فاز امولسیونی تهیه شده است . پلی هایپ HEMA_CO_NVP طی پلیمریزاسیون همزمان ۲-هیدروکسی اتیل متاکریلات HEMA و N- وینیل پیرولیدین یا همان NVP در حضور N,N متیلن بیس آکریل امید MBA بعنوان پیوند دهنده عرضی و پرسولفات آمونیوم APS و TEMED تترا متیلن دی آمین بعنوان آغاز گر تولید گردید. پلیمریزاسیون بر اساس روش پلیمریزاسیون رادیکال آزاد با استفاده از دو مایع غیر قابل امتزاج در روش پلی هایپ انجام شد. توصیف ساختار شیمیایی کوپلیمر مبتنی بر پلی هایپ توسط طیف‌سنجی Ft_IR و میکروسکوپ الکترونی SEM و تجزیه و تحلیل حرارتی انجام گردید. فرآیند بهینه‌سازی با اندازه‌گیری میزان جذب آب انجام شد و بهترین مقدار در هر مرحله ثابت نگه داشته شد. بالاترین میزان جذب آب هیدروژل متخلخل سنتز شده در روش هایپ ،۸.۹ گرم بر 1 گرم هیدروژل با میانگین منافذ ۵.۲ میکرومتر بود. در حالی که هیدروژل همان مقادیر واکنش دهنده ها و بدون روش HIPE ۱.۲ گرم در 1 گرم هیدروژل بود. این نتایج نشان می‌دهد که پلیمریزاسیون مبتنی بر پلی HIPE کوپلیمرها را می‌توان برای افزایش جذب آب در نظر گرفت.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Synthesis and characterization of porous co-polymeric hydrogels of 2-Hydroxyethyl methacrylate and N-vinyl pyrrolidone via high internal phase emulsion

نویسندگان English

Hassan Hassani
Ghasem Rezanejad
Hossein Ali Kharazmi
Department of Chemistry, Payame Noor University, PO BOX 19395-3697, Tehran, Iran
چکیده English

Porous polymeric materials (poly HIPEs) have attracted considerable attention in many fields focused on biomaterial applications. In this research, co-polymeric hydrogels of poly (HEMA-co-NVP) were synthesized in the emulsion phase. Poly (HEMA-co-NVP) poly HIPE was produced by co-polymerization of 2-Hydroxyethyl methacrylate (HEMA) and N-vinylpyrrolidone (NVP) in the presence of N, N-methylene bisacrylamide (MBA as cross-linker), and initiation of ammonium persulfate (APS) and N, N, N, N-tetramethylene diamine (TEMED). The co-polymerization was based on the free-radical polymerization method by employing two immiscible liquids in the poly HIPE method. The characterization of the poly HIPE-based co-polymer was done by Fourier transforms infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The optimization process was done by measuring the water absorption and the best amount was kept stable in each stage. The highest water absorption value of synthetic porous hydrogel synthesized in the HIPEs method was 8.9 g/g with average pores of 2-5 μm, while its synthetic hydrogel with the same values of reactants and without HIPEs method was 1.2 g/g. These results show that the poly HIPE-based polymerization of co-polymers can be intended to raise their water uptake.

کلیدواژه‌ها English

poly HIPE
hydrogel
water swelling
emulsion-templating
2-Hydroxyethyl methacrylate
N-vinylpyrrolidone
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