Allyl isothiocyanate (AITC), a natural pungent flavor from wasabi and horseradish, is well-known antimicrobial agents against foodborne pathogens. However, its highly volatile nature and low thermal stability restrict its application in the food packaging industry. Also, its strong organoleptic characteristics hinder its application at a higher dosage. We encapsulated AITC in β-cyclodextrin (β-CD) and triacetyl-β-CD (TA-β-CD) and evaluated the performance as slow releasing active compounds through low-density polyethylene (LDPE)–cyclodextrins (CDs) matrix. Also, the thermal, optical, mechanical, and barrier properties of two ternary blends, LDPE/β-CD/AITC(L-CDs) and LDPE/TA-β-CD/AITC(L-TACDs), were investigated to compare their compatibility under the plastic extrusion process. During the 15 days of the storage period, L-TACDs maintained more consistent AITC release and a higher concentration than L-CDs. Also, the blending of LDPE and TA-β-CD was more compatible with that of LDPE and β-CD. No significant optical, mechanical, and barrier property changes were observed in LDPE with less than 3% of TA-β-CD while L-CDs showed substantial agglomeration on the ternary blend films and the lower mechanical and barrier properties than pure LDPE. The results indicate that the LDPE films containing TA-β-CD/AITC can be applied as an effective antimicrobial packaging material for food and nonfood applications.
Bibliographical noteFunding Information:
TA-β-CD was donated by Cellresin Technologies, LLC (White Bear Lake, MN). LDPE pellets (ELITETM 5023G) were supported by Dow Chemical (Midland, MI). β-CD, AITC (purity >95%), and isopropyl alcohol (purity >98%) were purchased from Sigma Aldrich (St. Louis, MO). Acetone and ethanol were purchased from Acros Organics (NJ) and Glass Mason jars (475 mL) were purchased from Ball Co. (Buffalo, NY).
The authors would like to thank Will Wood in Cellresin Technologies, LLC to support TACD for this project.
© 2019 Wiley Periodicals, Inc.
All Science Journal Classification (ASJC) codes
- Surfaces, Coatings and Films
- Polymers and Plastics
- Materials Chemistry