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Antimicrobial efficacy of N-halamine coatings prepared via dip and spray layer-by-layer deposition

Paper ID Volume ID Publish Year Pages File Format Full-Text
18816 43035 2015 8 PDF Available
Title
Antimicrobial efficacy of N-halamine coatings prepared via dip and spray layer-by-layer deposition
Abstract

•Spray assisted layer-by-layer deposition produces effective antimicrobial coatings.•Antimicrobial polymer coatings exhibited >99.999% reduction in microbial populations.•N-halamine antimicrobial coatings can support reducing foodborne illness.

Antimicrobial coatings in which the active agent (e.g. N-halamine) can regenerate activity represent a promising way to prevent microbial cross-contamination. A reported method for applying coatings containing antimicrobial N-halamines is layer-by-layer (LbL) application of polyelectrolytes which form N-halamines upon cross-linking. Prior reports on dip LbL have demonstrated the potential of this technology; however, spray LbL represents a more commercially translatable technology. In this work, dip and spray LbL methods were used to coat polypropylene (PP) with N-halamine containing bilayers of cross-linked polyethyleneimine (PEI) and polyacrylic acid (PAA). Materials were characterized using atomic force microscopy, ellipsometry, contact angle, Fourier transform infrared spectroscopy, and colorimetric assays for chlorine and amine contents. Both methods exhibited >99.999% reduction against Listeria monocytogenes with application time for spray LbL taking 6% of the time required for dip LbL. Spray LbL fabrication of N-halamines is a rapid and inexpensive method to fabricate rechargeable antimicrobial surfaces.

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Keywords
Antimicrobial coatings; Layer-by-layer assembly; N-halamines; Surface modification; Polyelectrolyte multilayers
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Publisher
Database: Elsevier - ScienceDirect
Journal: Food and Bioproducts Processing - Volume 96, October 2015, Pages 12–19
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us