دانلود مقاله Investigate mechanisms of production of Nano Powders With ، SCF، RESS، PGSS and DELOS methods and evaluate their
سال انتشار: ۱۳۹۰
محل انتشار: سومین همایش ملی تحقیقات نوین در شیمی و مهندسی شیمی
تعداد صفحات: ۴
Shahriar Arjmand – Department of Analytical Chemistry, Islamic Azad University, Firoozabad Branch, , Iran
The basis of nanotechnology is the ability to form nano-sized particles, for example nano powders, which are solid particles that measure on the nano scale, usually comprised of three to five molecules together. Nano powders can be used in most of the aforementioned applications; therefore, they have been a field of great interest. Nano powders have been of extreme interest in the pharmaceutical field. Drug delivery has been impacted in several ways due to the advances in nano powder technology. Smaller particles are able to be delivered in new ways to patients, through solutions, oral or injected, and aerosol, inhaler or respirator. New production processes allow for encapsulation of pharmaceuticals which allow for drug delivery where needed within the body. Dosing of pharmaceuticals had also improved. Smaller particles mean Better absorption by the body therefore less drug is needed. Because of a combination of these, side effects are lessened due to better use of pharmaceuticals. The types of nana particles used in the pharmaceutical are Anti-Angiogenic, Therapeutics, Dendrimers, Cisplatin, and Fullerene-trapped nitrides. The applications of nano powders are used in the ceramics, electronics, and in the production of metals with no dislocations. Several methods are available for the production of nanopowder production. The objective of this paper is to give an introduction to the basics of nanotechnology and nano-powder production using supercritical fluids (SCF) as well as a comparison of these techniques. The processes that will be compared are the Rapid expansion of Supercritical Solutions (RESS) the Particles from Gas Saturated Solutions (PGSS), and the Depressurization of Expanded Liquid Organic Solution (DELOS). In order to achieve the aforementioned goals, literature research has been the starting point. Later this search was expanded to include the different methods of nano powder production and a comparison of these methods.