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Author Vijay, Y. K.
Source IACS Kolkata
Content type Text
Publisher Indian J. Phys.
File Format PDF
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics
Subject Keyword Nanofilters ♦ Gas permeability ♦ Selectivity
Abstract Swift heavy ion irradiation produces damage in polymers in the form of latent tracks. Latenttracks can be enlarged by etching it in a suitable etchant and thus nuclear track etch membrane can be formedfor gas permeation / purification in particular for hydrogen where the molecular size is very small. By applyingsuitable and controlled etching conditions well defined tracks can be formed for specific applications of themembranes. After etching gas permeation method is used for characterizing the tracks. In the present workpolycarbonate (PC) of various thickness were irradiated with energetic ion beam at Inter University AcceleratorCentre (IUAC), New Delhi. Nuclear tracks were modified by etching the PC in 6N NaOH at 60 (±1) oC from bothsides for different times to produce track etch membranes. At critical etch time the etched pits from both the sidesmeet a rapid increase in gas permeation was observed. Permeability of hydrogen and carbon dioxide has beenmeasured in samples etched for different times. The latent tracks produced by SHI irradiation in the track etchmembranes show enhancement of free volume of the polymer. Nano filters are separation devices for themixture of gases, different ions in the solution and isotopes and isobars separations. The polymer thin films withcontrolled porosity finding it self as best choice. However, the permeability and selectivity of these polymerbased membrane filters are very important at the nano scale separation. The Swift Heavy Ion (SHI) inducednuclear track etched polymeric films with controlled etching have been attempted and characterized as nanoscale filters.
Education Level UG and PG
Learning Resource Type Article
Journal Indian J Phys
Volume Number 83
Issue Number 7
Page Count 9
Starting Page 927
Ending Page 935