Nuclear Techniques ›› 2017, Vol. 40 ›› Issue (10): 100301-100301.doi: 10.11889/j.0253-3219.2017.hjs.40.100301


Characteristics of polycarbonate and polyester nuclear track membranes

CAI Chang1,2, CHEN Qi4, MIAO Jing2,3, CHEN Yonghui1, JIANG Zhibin3, MO Dan1, LIU Jie1   

  1. 1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
    2. Shenzhen Institute of Advanced Technologies, Chinese Academy of Sciences, Shenzhen 518055, China;
    3. Guangdong Key Laboratory of Membrane Materials and Membrane Separation, Guangzhou Institute of Advanced Technology, Chinese Academy of Sciences, Guangzhou 511458, China;
    4. Qingdao Zhongkehualian New Material Co., Ltd., Qingdao 266500, China
  • Received:2016-12-31 Revised:2017-04-19 Online:2017-10-10 Published:2017-09-29
  • Supported by:
    Supported by the Project on the Integration of Industry, Education and Research of Guangdong Province (No.2016B090918048), Shenzhen Basic Research Programs (No.JCYJ20140417113430673, No.JCYJ20150630114942296), the International Science & Technology Cooperation Program of Nansha Free Trade Zone (No.2015GJ002)

Abstract: Background: Polycarbonate (PC) and polyethylene terephthalate (PET) films were widely used as the materials for nuclear track membranes because both of them could be etched effectively with alkaline solutions. Purpose: This paper aims to research the characteristics of polycarbonate and polyester nuclear track membranes. Methods: The PC and PET foils were irradiated with Au ions (11.4 MeV·u-1) and Kr ions (20 MeV·u-1) respectively. Then the irradiated foils were etched with the NaOH aqueous solution. The pore sizes of PC and PET nuclear track membranes were in the range of 20 nm to 400 nm and 100 nm to 700 nm, respectively. Results: The pore sizes and their distributions of these membranes were characterized with scanning electron microscopy (SEM) and the method of gas-liquid displacement, respectively. It suggested that the irradiation fluence determined the membrane pore density; the longer the etching time, the larger the membrane pore size, and the evener the distribution of membrane pore sizes. The surfaces of the irradiated PET membranes were more hydrophilic than those of the irradiated PC membranes. Conclusion: The experimental results suggest that bovine serum albumin (BSA) in aqueous solution could be rejected effectively by PET nuclear track membranes with different membrane pore sizes at 0.15 MPa and ambient temperature. The smaller the membrane pore size, the higher the rejection to BSA, and the higher the operating pressure required, resulting in more serious membrane fouling.

Key words: Nuclear track membrane, Pore size, Bovine serum albumin, Rejection performance

CLC Number: 

  • TL99