|Celever Iranian Shargh|
Home Appliance Cooling and HeatingRefrigerator
Zinc oxideZnO Nanoparticle /Nanopowder CAS Number : 1314-13-2
Antibacterial properties can be obtained by the use of granules containing nanoparticles. The “antibacterial activity” was evaluated by ISIRI 10900 standard “Measurement of antibacterial activity on plastics and other non-porous surfaces. Antibacterial activity is an indicator of the product ability to eliminate bacteria. It is obtained by comparison of bacteria number present on control and nanometric samples after 24 hours’ exposure. According to standard, when the antibacterial activity of the product is between 2 and 3, the effectiveness is good. If antibacterial activity is greater than 3, the effectiveness is intense and strong.
Nowadays, refrigerators and freezers have become one of the main requirements in all kitchens. These household appliances postpone spoilage of foodstuffs, and as a result they increase food storage time. A refrigerator maintains a temperature a few degrees above the freezing point of water. A similar device that maintains a temperature below the freezing point of water is called a freezer. In this product, there are two completely separate spaces for the refrigerator and freezer. These kinds of products are suitable for big kitchens which have enough space for these two. Since the temperature in freezers is less in comparison with refrigerators, the food storage time is more in them so that this time increases from a few days in refrigerators to some months in freezers. In addition, decrease in amount of bacteria existing in refrigerators can improve the food storage time. Bacteria can even cause illnesses without changing food’s tastes, smells and appearances. To this end, refrigerators with antibacterial inside wall, that nanotechnology have been used in their making are developed.