Document Detail

Direct observation of the spatial distribution of charges on a polypropylene fiber via Electrostatic Force Microscopy.
MedLine Citation:
PMID:  23140375     Owner:  NLM     Status:  In-Data-Review    
The spatial distribution of electrical charges along the longitudinal axes of a polypropylene electret fiber was determined using Electrostatic Force Microscopy (EFM). EFM mapping on highly curved surfaces, such as those of polymeric fibers, is a challenging endeavour and most work reported in the scientific literature has been limited to single line-scan analysis or flat specimens. Charged polymeric fibers, electrets, are extensively used in high performance filtration applications and methods to determine the amount and magnitude of the charges on these fibers remain elusive. Electrical charge maps of individual fibers were obtained by biasing the tip to -10 V and maintaining a constant tip-sample distance of 100 nm. Spatially dependant EFM phase and magnitude gradients were determined and the developed technique may provide a unique understanding into the heterogeneous charge distribution on electrets fibers. Direct mapping of the charge distribution in electrets fibers can offer new insights in the development of antistatic additives, new means to facilitate electrostatic self-assembly of nano-moieties on the surface of fibrous materials and a quantitative metrics capable of determining discharge dynamics and predicting the shelf-life of filtration media.
R Bonilla; A Avila; C Montenegro; J Hinestroza
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of microscopy     Volume:  248     ISSN:  1365-2818     ISO Abbreviation:  J Microsc     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-11-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0204522     Medline TA:  J Microsc     Country:  England    
Other Details:
Languages:  eng     Pagination:  266-70     Citation Subset:  IM    
Copyright Information:
© 2012 The Authors Journal of Microscopy © 2012 Royal Microscopical Society.
Department of Electrical and Electronic Engineering, Universidad de los Andes, Bogotá, Colombia Fiber Science and Apparel Design, Cornell University, Ithaca, New York, U.S.A.
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