Sensitive Detection of Polyimides Degradation by Microorganisms Using Electrochemical Impedance Spectroscopy

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概要

• 論文の詳細を見る

• The microbial degradation of electronic insulation polyimides was monitored and evaluated using electro-chemical impedance spectroscopy (EIS). The microbial inoculum, comprising Aspergillus versicolor, Chaetomium species, Cladosporium cladosporioides, and Tricoderma viride, was isolated previously from deteriorated polyimides. After inoculation, fungal growth on the polyimides resulted in distinctive EIS spectra indicative of polymer insulation failure, which directly related to polymer integrity. Degradation appeared to progress in a number of steps and two distinctive stages in the decline of film resistance were detected in the EIS cells within 24 and 72 days after inoculation. The early stage of the decrease in resistance may be related to the ingress of water molecules and ionic species into the polymeric materials, while the second stage probably resulted from partial degradation of the polymers by fungal growth on the polymer film. The relationship between changes of impedance spectra and microbial degradation of the polymer was further supported by scanning electron microscopy (SEM) of fungi growing on the surface of the inoculated polyimides. Our data indicate that the EIS technique can be used to detect the early degradation of resistant polymers and that polyimides are susceptible to biodegradation by fungi.

• 日本微生物生態学会の論文

著者

• Gu Ji-dong

  Environmental And Molecular Microbiology South China Sea Institute Of Oceanography Chinese Academy O

• GU JI-GUANG

  Key Laboratory of Terrestrial Ecological Process, Shenyang Institute of Applied Ecology, Chinese Aca

• LIU JIANHUA

  Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics

• CHENG SHU-PEI

  Department of Environmental Sciences, The National Key Laboratory of Pollution Control and Resource

• Liu Jianhua

  Department Of Acupuncture Second School Of Clinical Medicine Guangzhou University Of Chinese Medicin

• Liu Jianhua

  Department Of Materials Science And Engineering Beijing University Of Aeronautics And Astronautics

• Cheng Shu-pei

  Department Of Environmental Sciences The National Key Laboratory Of Pollution Control And Resource R

関連論文

• Sensitive Detection of Polyimides Degradation by Microorganisms Using Electrochemical Impedance Spectroscopy
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