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Article: Sensitive detection of polyimides degradation by microorganisms using electrochemical impedance spectrosopy

TitleSensitive detection of polyimides degradation by microorganisms using electrochemical impedance spectrosopy
Authors
KeywordsPolyimides
Electronic insulation polymer
Biodegradation
Biodeterioration
Fungi
Issue Date2002
PublisherNihon Biseibutsu Seitai Gakkai. The Journal's web site is located at http://www.jstage.jst.go.jp/browse/jsme2/_vols/-char/en
Citation
Microbes and Environments, 2002, v. 17 n. 2, p. 105-112 How to Cite?
AbstractThe 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.
Persistent Identifierhttp://hdl.handle.net/10722/73103
ISSN
2015 Impact Factor: 2.075
2015 SCImago Journal Rankings: 1.267

 

DC FieldValueLanguage
dc.contributor.authorGu, Jen_HK
dc.contributor.authorGu, JGen_HK
dc.contributor.authorLiu, Jen_HK
dc.contributor.authorCheng, Sen_HK
dc.date.accessioned2010-09-06T06:48:11Z-
dc.date.available2010-09-06T06:48:11Z-
dc.date.issued2002en_HK
dc.identifier.citationMicrobes and Environments, 2002, v. 17 n. 2, p. 105-112en_HK
dc.identifier.issn1342-6311en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73103-
dc.description.abstractThe 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.-
dc.languageengen_HK
dc.publisherNihon Biseibutsu Seitai Gakkai. The Journal's web site is located at http://www.jstage.jst.go.jp/browse/jsme2/_vols/-char/enen_HK
dc.relation.ispartofMicrobes and Environmentsen_HK
dc.subjectPolyimides-
dc.subjectElectronic insulation polymer-
dc.subjectBiodegradation-
dc.subjectBiodeterioration-
dc.subjectFungi-
dc.titleSensitive detection of polyimides degradation by microorganisms using electrochemical impedance spectrosopyen_HK
dc.typeArticleen_HK
dc.identifier.emailGu, J: jdgu@hkucc.hku.hken_HK
dc.identifier.authorityGu, J=rp00701en_HK
dc.description.naturelink_to_OA_fulltext-
dc.identifier.doi10.1264/jsme2.2002.105-
dc.identifier.hkuros69648en_HK
dc.identifier.volume17-
dc.identifier.issue2-
dc.identifier.spage105-
dc.identifier.epage112-
dc.publisher.placeJapan-

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