فهرست

بررسی تجربی افزایش خواص خودتمیزشوندگی رزین آلکیدی با استفاده از نانوذرات اصلاح شده اکسیدروی

نشریه: بهار ۱۳۹۷ - مقاله 9   صفحات :  73 تا 81



کد مقاله:
nm-473

مولفین:
رضا رضا مهدوی: دانشگاه گیلان - دانشکده فنی
سید سیامک اشرف طالش: دانشگاه گیلان - دانشکده مهندسی شیمی


چکیده مقاله:

در این تحقیق، کارایی خاصیت خودتمیزشوندگی رزین آلکیدی حاوی نانوذرات اکسیدروی ZnO بررسی شده است. تولید سطوح با خاصیت خودتمیزشوندگی به روش تجزیه فوتوکاتالیستی بر اساس تخریب شیمیایی مواد آلاینده در اثر تابش نور امکان پذیر می باشد. برای این منظور نانوذرات خالص و دوپ شده ZnO به روش سل ژل به عنوان رنگدانه سنتز شدند. ساختار، مورفولوژی و عملکرد فوتوکاتالیستی ذرات به ترتیب با آنالیز های پراش پرتو ایکس XRD، میکروسکوپ الکترونی عبوری TEM و اسپکتروفوتومتر UV-VIS بررسی گردید. پوشش پلیمری بر پایه رزین آلکیدی از نوع Long Oil و حلال وایت اسپریت تهیه و توسط یک اپلیکاتور با ضخامت 100 میکرون بر روی ورق گالوانیزه اعمال گردید. ساختار هگزاگونال با اندازه متوسط 30 نانومتر برای نانوذرات خالص ZnO و ساختار میله ای با اندازه متوسط 50 نانومتر برای نانوذرات دوپ شده ZnO به دست آمد. فعالیت فوتوکاتالیستی پوشش های اعمال شده با قرارگیری در معرض آلاینده متیل اورانژ و پرتو فرابنفش اندازه گیری و خصوصیات نوری آن با پوشش حاوی نانورنگدانه تیتانیوم دی اکسید TiO2 به عنوان نمونه مرجع مقایسه گردید. با توجه به نتایج، نمونه دوپ شده ZnO بعد از 6 ساعت تابش، 40 درصد تخریب را داشته است. در حالی که فرم دوپ نشده ZnO و ذرات TiO2 طی همین مدت به ترتیب 25 و 35 درصد تخریب را به وجود آوردند. بررسی سینتیکی تخریب نشان داد که تخریب به خوبی از معادله سنتیک مرتبه اول پیروی می کند.


Article's English abstract:

In this research, the efficiency of the self-cleaning property of alkyd resin containing zinc oxide ZnO nanoparticles has been investigated. Production of surfaces with self-cleaning property is possible by photocatalytic degradation method based on the chemical degradation of contaminated materials under light radiation. For this purpose, pure and doped ZnO nanoparticles were synthesized by sol-gel method as a pigment. The structure, morphology and photocatalytic performance of particles were investigated by X-Ray diffraction analysis XRD, transient electron microscopy TEM and UV-VIS spectrophotometer, respectively. The polymeric coating based on the alkyd resin from the type of long oil and white spirit solvent was prepared and was applied on the galvanized sheet by an applicator with a thickness of 100 microns. Hexagonal structure with an average size of 30 nm and rod-like structure with an average size of 50 nm were obtained for pure ZnO nanoparticles and doped ZnO nanoparticles, respectively. Photocatalytic activity of applied coatings exposed to methyl orange contaminant and ultraviolet radiation was measured and its optical properties were compared to coating including nanopigments titanium dioxide TiO2 as the reference sample. According to the results, doped ZnO sample after 6 hours radiation, has had 40 of degradation. While undoped ZnO form and TiO2 particles at the same time have created 25 and 35 of degradation, respectively. The kinetic investigation of degradation showed that degradation follows well the first order kinetic equation.


کلید واژگان:
اکسیدروی، نانوذرات دوپ شده، خودتمیزشوندگی، رزین آلکیدی، متیل اورانژ

English Keywords:
Zinc oxide, Doped nanoparticles, Self-cleaning, Alkyd resin, Methyl orange

منابع:

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