لایه نشانی لایه نازک نانوهیبریدی TEOS-GPTMS روی زیرلایه پلی‌متیل متاکریلات

نویسندگان

دانشکده مهندسی مواد، دانشگاه صنعتی مالک اشتر، شاهین‌شهر

چکیده

لایه نازک نانوهیبریدی تترا اتیل اورتوسیلیکات- تری‌گلیسیدوکسی‌یپروپیل تری‌متوکسی‌سیلان روی زیرلایه پلی‌متیل متاکریلات به‌روش سل- ژل غوطه‌­وری اعمال شد. آزمون‌های پراش­‌سنجی پرتو ایکس، طیف‌­سنجی تبدیل فوریه مادون قرمز با تکنیک بازتاب کلی تضعیف شده، میکروسکوپی الکترونی روبشی گسیل میدانی و میکروسکوپی نیروی اتمی به‌ترتیب به‌منظور بررسی ساختار، پیوندهای سطحی، مورفولوژی و زبری لایه نازک صورت گرفت. طیف­سنجی نور مرئی- فرابنفش به‌منظور اندازه­گیری طیف عبور نمونه­‌ها انجام شد. همچنین چسبندگی و سختی پوشش به‌ترتیب توسط آزمون­‌های نوار و مداد ارزیابی شد. نتایج حاصل از آنالیز پراش­سنجی پرتو ایکس، تشکیل پوششی با ساختار آمورف را اثبات کرد. همچنین تصاویر میکروسکوپی الکترونی روبشی گسیل میدانی مشخص کرد که با اضافه کردن GPTMS به سل TEOS فیلمی عاری از ترک ایجاد خواهد شد. همچنین بر اساس نتایج طیف‌­سنجی نور مرئی- فرابنفش، اعمال لایه نازک نانوهیبریدی افزایش میزان عبور را در ناحیه مرئی نسبت به زیرلایه پلی‌متیل متاکریلات به‌همراه خواهد داشت. در ضمن، آزمون مداد نشان داد که با اعمال لایه نازک نانوهیبریدی روی زیرلایه پلیمری سختی از H3 به H6 افزایش می­یابد. از طرفی آزمون نوار چسبندگی بالای لایه نازک نانوهیبریدی را به زیرلایه پلی­متیل متاکریلات اثبات کرد. درنتیجه پوشش شفاف هیبریدی آلی- معدنی GPTMS-TEOS، می‌تواند به‌عنوان پوشش ضد‌خش روی زیرلایه پلیمری پلی­متیل متاکریلات استفاده شود.

کلیدواژه‌ها


عنوان مقاله [English]

Fabrication and Characterization of an Optical Nano-hybrid Sol-gel Derived Thin Film on the PMMA Substrate

نویسندگان [English]

  • M. Hajfarajzadeh
  • A. Eshaghi
  • A. Aghaei
Department of Materials Engineering, Maleke Ashtar University of Technology, Shahin Shahr, Iran.
چکیده [English]

A TEOS-GPTMS nano-hybrid thin film was deposited on the polymethyl methacrylate (PMMA) substrate by a sol-gel dip coating method. Morphology, roughness and surface chemical bonding of the thin films were evaluated by X-ray diffraction (XRD), field emission scanning electron microscopy(FE-SEM), atomic force microscopy, and Fourier transform infrared spectroscopy methods, respectively. UV-vis spectrophotometer was used to measure the transmittance spectra of the samples. Also, the adhesion and hardness of the coatings were investigated using pencil hardness the adhesion tape test and the test, respectively. XRD results proved that the thin film had an amorphous structure. Also, FE-SEM images indicated that addition of GPTMS to the TEOS yielded a crack-free thin film. Based on the UV-vis spectroscopy results, the transmittance of the polymer substrate in the visible region was increased by the deposition of the nano-hybrid coating. Moreover, the hardness of the PMMA substrate was increased from 3H to 6H by the deposition of the nano-hybrid thin film.  Also, tape test confirmed the  high adhesion of the nano-hybrid thin film on the PMMA substrate. Consequently, the transparent organic-inorganic GPTMS-TEOS  hybrid coating can be used as a scratch resistant coating on the PMMA substrate.

کلیدواژه‌ها [English]

  • thin film
  • Hybrid
  • Optical properties
  • Hardness
  • Sol-gel
  • PMMA
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