Effect of temperature and �?-irradiation on gas permeability for polymeric membrane

Bulletin of materials science

N K Acharya¹  Vaibhav Kulshrestha¹  Y K Vijay¹  M Singh¹  K Awasthi¹ 

[1] Department of Physics, University of Rajasthan, Jaipur 302 004, India$$Department of Physics, University of Rajasthan, Jaipur 302 004, IndiaDepartment of Physics, University of Rajasthan, Jaipur 302 004, India$$

关键词: Activation energy;    gas permeability;    permselectivity;    track etched membrane;    critical etching time.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

In the present study the polyethersulphone (PES) membranes of thickness (35 ± 2) 𝜇m were prepared by solution cast method. The permeability of these membranes was calculated by varying the temperature and by irradiation of ð›�? ions. For the variation of temperature, the gas permeation cell was dipped in a constant temperature water bath in the temperature range from 303â€�??373 K, which is well below the glass transition temperature (498 K). The permeability of H₂ and CO₂ increased with increasing temperature. The PES membrane was exposed by ð›�?-source (${}_{95}$Am$^{241}$) of strength (1 ðœ�? Ci) in vacuum of the order of 10^-6 torr, with fluence 2.7 Ã�? 10⁷ ions/cm². The permeability of H₂ and CO₂ has been observed for irradiated membrane with increasing etching time. The permeability increases with increasing etching time for both gases. There was a sudden change in permeability for both the gases when observed at 18 min etching. At this stage the tracks are visible with optical instrument, which confirms that the pores are generated. Most of pores seen in the micrograph are circular cross-section ones.

【 授权许可】

Unknown