Studying the adsorption of PEG and PVA on the Zinc oxide nanoparticles

سال انتشار: 1388
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,648

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شناسه ملی سند علمی:

ICHEC06_431

تاریخ نمایه سازی: 1 مهر 1388

چکیده مقاله:

Zinc oxide (ZnO) nanoparticles, a member of Wurtzite family, are one of the most important nanostructures. ZnO has got three advantages Comparing to other oxide. First, it is a semi-conductive substance with a band gap 3.37 eV and the high excitation energy of 60 meV. It also has a emission near the ultraviolet. Second, it is piezoelectric and is frequently used in sensors and reducers. Third, it is biodegradable and non-poisonous. Aggregation is common problem that occurs during the formation of these particles. One of the methods to overcome this problem is to coat the particles by various materials. Polymer coating is an effective way for modifying the particles surface. Polymer adsorption by nanoparticles improves the stability of the suspension against aggregation. In this study, PEG and PVA are used in order to prevent ZnO nanoparticles from aggregation, and also important and effective factors of polymer adsorption such as molecular weight are discussed. The adsorption process is analyzed by IR, the size and the structure of ZnO nanoparticles by XRD, the amount of molar mass of the adsorbed polymer by TGA, and finally, the aggregation and accumulation of the nanoparticles by SEM.

نویسندگان

Monirsadat Saadat

Department of Physics, Faculty of Basic Sciences, Arak University, I.R. Iran

Gholamreza Nabiyouni

Department of Physics, Faculty of Basic Sciences, Arak University, I.R. Iran

Abolfazl Barati

Department of Chemical Engineering, Faculty of Engineering, Arak University, I.R. Iran

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