Volume 1, Issue 2 (Fall 2017)                   knowl Cons Rest 2017, 1(2): 103-110 | Back to browse issues page

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1- , m_hadian@yahoo.com
Abstract:   (934 Views)
The dangers posed by O3to historical properties and art works, as well as limited accessibility and inapplicable instrumental methods for measuring O3concentrationhave made it much more necessary to use low tech and inexpensive methods for this purpose in almost all museum environments. On the other hand, elastomers are known as polymers with high reactivity to ozone and latex as a natural elastomer is the most sensitive one to this gaseous pollutant. Hence this polymer has been considered as an ozone dosimeter.
In this scientific investigation, in order to attain the ozone dosimeter, the effect of this gas on the latex strips prepared in artificial condition was studied. For this purpose an aging chamber equipped with ozone generator was used. Since the oxidation of latex strips can also occur as a result of UV radiations, in order to study and compare the process with Ozone gas, testing samples were aged using UV lamps of 254 and 366 nm wavelengths.  All the examinations were carried out at 24 oC and 40% RH. The aged and intact latex strips were studied by means of ATR-FT-IR and digital microscope.
The results demonstrate the diverse and discernible oxidizing effects of O3 and UV radiations on latex. Furthermore, it is possible to estimate the concentration of ozone in the environment by the calibration of latex strips. The verification of the results obtained by latex dosimeters in museum environments was carried out by Ozone sensor over a day, confirming the results acquired.
Type of Study: Research | Subject: New materials and technologies
Received: 2017/06/23 | Accepted: 2017/07/27 | Published: 2017/09/23

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