Change search
ReferencesLink to record
Permanent link

Direct link
Influence of Biofilm Contamination on Electrical Performance of Silicone Rubber Based Composite Materials
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
Show others and affiliations
2012 (English)In: IEEE transactions on dielectrics and electrical insulation, ISSN 1070-9878, E-ISSN 1558-4135, Vol. 19, no 5, 1690-1699 p.Article in journal (Refereed) Published
Abstract [en]

In this research, three kinds of silicone rubber based composite materials, SIR, NSIR and DSIR, were prepared. SIR is the reference silicone rubber without addition of antimicrobial biocide. Two different antimicrobial agents at a concentration of 3 wt% were added to the reference silicone rubber to form the other two types of materials. The materials were inoculated with a fungal spore suspension containing nutrients. Fungal growth could be observed visually in form of spots by naked eye, and biofilm was formed and detected by SEM observation on the surfaces of SIR and NSIR samples, whereas DSIR samples were completely free of the fungal growth. Then the electrical performance of both clean and biofilm contaminated samples, including the surface and volume conductivity, surface flashover voltage and leakage current before flashover, were measured. The obtained results indicate that as compared with SIR base material, the biocides have not changed the surface conductivity and surface flashover voltage of NSIR and DSIR materials. At the same time, the volume conductivity of NSIR remains almost the same as SIR, while that of DSIR increases by about two orders of magnitude. Biofilm could increase the surface conductivity and decrease the surface flashover voltage significantly. The time domain and frequency domain analyses of the leakage currents flowing before flashover event provide useful information on the severity of contamination by biofilm and the eventual risk for surface flashover.

Place, publisher, year, edition, pages
2012. Vol. 19, no 5, 1690-1699 p.
Keyword [en]
Silicone rubber, antimicrobial agent, fungal growth, biofilm, surface conductivity, flashover voltage, leakage current, fast Fourier transform
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:kth:diva-105663DOI: 10.1109/TDEI.2012.6311517ISI: 000309732300030ScopusID: 2-s2.0-84867044715OAI: diva2:571568

QC 20121123

Available from: 2012-11-23 Created: 2012-11-23 Last updated: 2012-11-23Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Atarijabarzadeh, SevilStrömberg, EmmaKarlsson, Sigbritt
By organisation
Fibre and Polymer TechnologyPolymer Technology
In the same journal
IEEE transactions on dielectrics and electrical insulation
Electrical Engineering, Electronic Engineering, Information Engineering

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 34 hits
ReferencesLink to record
Permanent link

Direct link