title: Preparation and application of agar/alginate/collagen ternary blend functional food packaging films.
abstract: Ternary blend agar/alginate/collagen (A/A/C) hydrogel films with silver nanoparticles (AgNPs) and grapefruit seed extract (GSE) were prepared. Their performance properties, transparency, tensile strength (TS), water vapor permeability (WVP), water contact angle (CA), water swelling ratio (SR), water solubility (WS), and antimicrobial activity were determined. The A/A/C film was highly transparent, and both AgNPs and GSE incorporated blend films (A/A/C(AgNPs) and A/A/C(GSE)) exhibited UV-screening effect, especially, the A/A/C(GSE) film had high UV-screening effect without sacrificing the transmittance. In addition, the A/A/C blend films formed efficient hydrogel film with the water holding capacity of 23.6 times of their weight. Both A/A/C(AgNPs) and A/A/C(GSE) composite films exhibited strong antimicrobial activity against both Gram-positive (Listeria monocytogenes) and Gram-negative (Escherichia coli) food-borne pathogenic bacteria. The test results of fresh potatoes packaging revealed that all the A/A/C ternary blend films prevented forming of condensed water on the packaged film surface, both A/A/C(AgNPs) and A/A/C(GSE) composite films prevented greening of potatoes during storage. The results indicate that the ternary blend hydrogel films incorporated with AgNPs or GSE can be used not only as antifogging packaging films for highly respiring fresh agriculture produce, but also as an active food packaging system utilizing their strong antimicrobial activity.
authors.affiliation: Department of Food Engineering and Bionanocomposite Research Institute, Mokpo National University, 61 Dorimri, Chungkyemyon, Muangun, 534-729 Jeonnam, Republic of Korea.
authors.forename: Long-Feng
authors.initials: LF
authors.lastname: Wang
authors.affiliation: Department of Food Engineering and Bionanocomposite Research Institute, Mokpo National University, 61 Dorimri, Chungkyemyon, Muangun, 534-729 Jeonnam, Republic of Korea. Electronic address: jwrhim@mokpo.ac.kr.
authors.forename: Jong-Whan
authors.initials: JW
authors.lastname: Rhim
mesh_terms: D000362:Agar / Q000737:chemistry; D000464:Alginates / Q000737:chemistry; D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology; D032083:Citrus paradisi / Q000737:chemistry; D003094:Collagen / Q000737:chemistry; D004926:Escherichia coli / Q000187:drug effects; D005516:Food Microbiology; D018857:Food Packaging; D061353:Food Storage; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D020100:Hydrogels / Q000737:chemistry* / Q000494:pharmacology; D008089:Listeria monocytogenes / Q000187:drug effects; D053768:Metal Nanoparticles / Q000737:chemistry*; D008826:Microbial Sensitivity Tests; D010539:Permeability; D010936:Plant Extracts / Q000737:chemistry; D011198:Solanum tuberosum / Q000382:microbiology
chemical_list: D000464:Alginates; D000900:Anti-Bacterial Agents; D006603:Hexuronic Acids; D020100:Hydrogels; D010936:Plant Extracts; D020723:Glucuronic Acid; D000362:Agar; D003094:Collagen
keywords: Antimicrobial food packaging; Grapefruit seed extract; Silver nanoparticles