Nuclear Techniques ›› 2016, Vol. 39 ›› Issue (1): 10501-010501.doi: 10.11889/j.0253-3219.2016.hjs.39.010501


Measurement of pore diameter and filtration performance of nuclear track membranes

WANG Yang1, QU Hua1, MO Dan2   

  1. 1 Tianjin Polytechnic University, Tianjin 300387, China;
    2 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2015-11-03 Revised:2015-12-07 Online:2016-01-10 Published:2016-01-14
  • About author:WANG Yang, Male, born in 1992, graduated from Tianjin Polytechnic University in 2014, master student, major in condensed matter physics
  • Supported by:

    Supported by the National Natural Science Foundation of China (No.11205215)


Background: It is well known that nuclear track membranes (NTMs) were widely used in medicine, environment and other fields. But there is no standard pore size measurement method currently. For some specific fields of application like water treatment, filtration performance of NTMs with various pore size has seldom reported. Purpose: This paper aims to investigate pore size measurement method for NTMs and evaluate the filtration performance of NTMs with various pore size. Methods: Three measurement methods i.e. measuring of the thickness, observing by optical microscope and analyzing by pore size analyzer (bubble point method), were presented and compared, NTMs with pore sizes of 2 μm and 450 nm were used in this filtration experiments. The filtration performance was also evaluated. Results and Conclusion: Experimental results show that pore size analyzer is suitable for pore size less than 1μm, with an error ratio less than 5%, whilst the optical microscope is suitable for pore of cylindrical-shape or large size (more than 3 μm) with an error ratio less than 8%. NTMs with pore size of 2μm can reduce the chromaticity and turbidity by an average of 99.12% (particle counter). NTMs with pore size of 450 nm or less can effectively separate bacteria by an average of 99.90% (particle counter) in water.

Key words: Nuclear track membranes, Chemical etching, Measurement methods, Filtration performance

CLC Number: 

  • TL99