بررسی خواص نوری نانو کامپوزیت پلیمری اکسید گرافن برپایه متیل متاکریلات

بانان اشرفی, مهسا; قاضی طباطبایی, زهره

بررسی خواص نوری نانو کامپوزیت پلیمری اکسید گرافن برپایه متیل متاکریلات

نوع مقاله : پژوهشی اصیل

نویسندگان

مهسا بانان اشرفی ¹

زهره قاضی طباطبایی ²

¹ گروه مهندسی شیمی، واحد اهر، دانشگاه آزاد اسلامی، اهر، ایران

² گروه شیمی کاربردی، واحد اهر، دانشگاه آزاد اسلامی، اهر، ایران

چکیده

این تحقیق با هدف بررسی خواص نوری نانو کامپوزیت اکسیدگرافن و پلی متیل متا کریلات انجام شد. در ابتدا نانواکسید گرافن از اکسیداسیون پودر گرافیت توسط یک اسید قوی تهیه شد. شناسایی، تعیین خلوص و اندازه ذرات با استفاده از طیف سنجی مادون قرمز، پراش اشعه ایکس و میکروسکوپ الکترونی روبشی بدست آمد. میانگین اندازه نانو ذرات اکسید گرافن با استفاده از تکنیک XRD حدود nm 4/38 تخمین زده شد. سپس نانوکامپوزیت هایی از آن بر پایه پلی متیل متاکریلات به عنوان یک عنصر حسگر نوری به روش هم رسوبی آماده گردید، نانوکامپوزیت اکسیدگرافن / پلی متیل متاکریلات سنتز شده توسط آنالیزهای FE-SEM ، XRD وFT-IR شناسایی شد. برای بررسی خواص نوری نمونه های تهیه شده از طیف سنجی UV-vis و طیف سنج انعکاسی استفاده شد و مقادیر پارامترهای رنگی b*، a* و L* برای سه نمونه نانوکامپوزیتی که در شرایط یکسان تهیه شده بودند بدست آمد. همچنین شاخص سیاهی از رابطه Westlan محاسبه گردید که میانگین شاخص سیاهی برای این نانوکامپوزیت 7/3 بدست آمد. بررسی طیف های عبوری امواج UV-vis نمونه سنتز شده در ناحیه nm 300-1100 نشان داد که در ناحیه nm300- 700 عبور نور برای نمونه تقریبا صفر است. نتایج بدست آمده نشان دادکه استفاده از نانواکسید گرافن در ماتریس PMMA منجر به بهبود خواص پوششی نانو کامپوزیت می گردد و با به کارگیری این نانوذرات به عنوان رنگدانهها یا پرکنندههای سیاهرنگ، فام سیاه بهتری حاصل می شود.

کلیدواژه‌ها

نانواکسید گرافن

متیل متاکریلات

اسپکتروفتومتری

طیف سنج انعکاسی

موضوعات

نانو کامپوزیت

عنوان مقاله English

Investigation of optical properties of Graphene Oxideâ Poly Methyl Methacrylate Nanocomposites

نویسندگان English

mahsa bananeashrafi ¹

zohreh Ghazi Tabatabaei ²

¹ Chemical Engineering, Ahar Branch, Islamic Azad University, Ahar, Iran

² Department of Applied Chemistry, Ahar Branch , Islamic Azad University, Ahar, Iran

چکیده English

Optical properties of graphene oxide and poly methyl methacrylate nanocomposite was investigated in this paper. Initially, graphene oxide was prepared from the oxidation of graphite powder by a strong acid by Hummers-Offemane method. Then identification, purity determination and particle size were obtained by using infrared spectroscopy, X-ray diffraction and scanning electron microscopy. The average size of graphene oxide nano particles was estimated about 38.4 nm using the XRD technique. So nano composites of graphene oxide based on poly methyl methacrylate were prepared by the co-precipitation method as an optical sensor element. Nano composites were identified and characterized by FE SEM, EDX, XRD and FT IR analyzes. To investigate the optical properties of the specimens, UV-vis spectro photometry and reflective spectrometer were used. For three samples of the poly methyl methacrylate nano composite containing nano -graphene oxide, the values of the color parameters b *, a * and L * were obtained that were prepared in the same conditions. Then the black index of the Westlanchr('39')s ratio was calculated. The average blackness index calculated was 3.7 for this nano composite. The study of UV-vis spectra in the region of 400-1100 nm for this nano composite showed that in the 400 - 700 nm regions the light transmission of UV light is approximately zero. Therefore, the results showed that the use of graphene oxide in the PMMA matrix improves the nano composite coating properties against UV waves and nano oxide graphene gives better shades of black color compared to other fillers and pigments.

کلیدواژه‌ها English

Graphene oxide

Poly Methyl Methacrylate

spectrophotometer

Reflective Spectrometer

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