Solid Hydroxypropyl Beta Cyclodextrin For Ozone Storage

Ozone is widely used in oxidation, disinfection and other fields because of its strong oxidation ability. Ozone is a kind of gas which can not be stored in the environment because of its chemical instability. Therefore, this kind of molecule must be produced by the ozonator according to the need. This device is also called "ozonator". It generates discharge in the oxygen flow (O2) and generates ozone molecule (O3). Ozone can also be produced by plasma or other UV processes, especially at 185 nm. The lifetime of ozone molecule is limited. Under environmental conditions, the lifetime of ozone molecule in water is about 20 minutes. For example, it cannot be stored in bottles in pure or mixed form. It should be noted that the risk of explosion is high when the envisaged mixture is a mixture of tens of bar oxygen.

Among the tested cyclodextrins: alpha cyclodextrin, beta cyclodextrin, gamma cyclodextrin, hydroxypropyl beta cyclodextrin, sulfobutyl beta cyclodextrin and polymerized beta cyclodextrin (α -, β -, γ - CD, hpbcd, sbecd, BCD polymer), hydroxypropyl beta cyclodextrin (hpbcd) has been proved to be a very effective ozone gas storage host because it can be used in the complex (inclusion complex) To achieve about 1% of the guest content. This means that the solid cyclodextrin host can capture concentrations 100-1000 times higher than water. Due to the release of guest gas molecules in contact with water environment, the obtained ozone hpbcd complex showed significant antibacterial and antifungal effects. The stability of solid hpbcd complex is moderate at room temperature (20% ozone loss is observed every day), which can be overcome by cold storage.