Rechargeable antimicrobial surface modification of polyethylene

J Food Prot. 2008 Oct;71(10):2042-7. doi: 10.4315/0362-028x-71.10.2042.

Abstract

Polyethylene films were surface modified, to incorporate amine and amide functionalities, and subsequently were evaluated for their ability to recharge the antimicrobial N-halamine structures after contact with sodium hypochlorite, a common food-approved sanitizer. Surfaces were tested for chlorine retention and release, as well as antimicrobial activity against microorganisms relevant to food quality and food safety, including Escherichia coli K-12, Pseudomonas fluorescens, Bacillus cereus, and Listeria monocytogenes. N-Halamine functionalized polyethylene exhibited chlorine rechargeability, maintaining 5 to 7 nmol/cm2 N-halamine structures for six successive charges. The N-halamine functionalized films achieved a 4-log reduction for all organisms tested and maintained a greater than 3-log reduction for four successive uses, suggesting that the modified polyethylene films are capable of providing rechargeable antimicrobial activity. The modified films exhibited antimicrobial activity in aqueous suspensions (P < 0.05) and reduced microbial growth in diluted broth (P < 0.05), suggesting the potential for biocidal action even in the presence of organic matter. Such a rechargeable antimicrobial surface could supplement existing cleaning and sanitation programs in food processing environments to reduce the adhesion, growth, and subsequent cross-contamination of food pathogens, as well as food spoilage organisms.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Bacillus cereus / drug effects
  • Bacillus cereus / growth & development
  • Biofilms / growth & development*
  • Colony Count, Microbial
  • Consumer Product Safety
  • Disinfectants / chemistry*
  • Disinfectants / pharmacology
  • Escherichia coli K12 / drug effects
  • Escherichia coli K12 / growth & development
  • Food Contamination / prevention & control*
  • Food Microbiology
  • Humans
  • Listeria monocytogenes / drug effects
  • Listeria monocytogenes / growth & development
  • Polyethylene / chemistry*
  • Pseudomonas fluorescens / drug effects
  • Pseudomonas fluorescens / growth & development
  • Sodium Hypochlorite / chemistry*

Substances

  • Disinfectants
  • Polyethylene
  • Sodium Hypochlorite