Effects of Ag ion substitution in zeolite and use of citric acid on the efficacy of antimicrobial properties of EVA-PE composite films

IF 3.8 4区工程技术 Q2 CHEMISTRY, APPLIED Journal of Vinyl & Additive Technology Pub Date : 2024-12-05 DOI:10.1002/vnl.22184

Sera Im, Jun-Young Lee, Jongchul Seo, Jaewoo Bai, Myeong-Su Jeon, Sea C. Min

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Abstract

Porous zeolites substituted with Ag ions (Ag_[zeolite]) or citric acid-dealuminated Ag_[zeolite] (CA-Ag_[zeolite]) were incorporated into an ethylene–vinyl acetate (EVA) and polyethylene (PE) copolymer using an extrusion process. The antimicrobial effects of the resulting films were evaluated against Escherichia coli, Staphylococcus aureus, and Human coronavirus 229E, and their physical and tensile properties were examined. CA-Ag_[zeolite] exhibited superior antibacterial results compared to Ag_[zeolite] for both bacteria, and the CA-Ag_[zeolite]-EVA-PE film demonstrated higher antimicrobial effects against the tested microorganisms than the Ag_[zeolite]-EVA-PE film. Surface elemental analysis, determination of the specific surface areas, and pore size investigations demonstrated that CA-Ag_[zeolite] possessed higher hydrothermal stability than the zeolite or Ag_[zeolite] alone. Furthermore, the CA-Ag_[zeolite]-EVA-PE film exhibited a higher L* value and lower a* and b* values than the Ag_[zeolite]-EVA-PE film along with lower absorbance. The former also demonstrated higher tensile strength and moisture permeability, in addition to lower roughness values on both its cross-section and surface. Moreover, the Ag_[zeolite]-EVA-PE and CA-Ag_[zeolite]-EVA-PE films exhibited higher thermal decomposition temperatures than the EVA-PE composite. Overall, the CA-Ag_[zeolite]-EVA-PE film showed potential for use as a novel antimicrobial film for application in food packaging and kitchen utensil coating materials.

Highlights

Antimicrobials were prepared with EVA/PE, Ag_[zeolite], and citric acid (CA)
EVA/PE films containing Ag_[zeolite] and CA showed strong antimicrobial effects
CA addition improved Ag_[zeolite] distribution in the film and the film color
CA addition enhanced the tensile, moisture barrier, and thermal properties
Potential applications include antimicrobial packaging and utensil coatings

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来源期刊

Journal of Vinyl & Additive Technology 工程技术-材料科学：纺织

CiteScore

5.40

自引率

14.80%

发文量

审稿时长

>12 weeks

期刊介绍： Journal of Vinyl and Additive Technology is a peer-reviewed technical publication for new work in the fields of polymer modifiers and additives, vinyl polymers and selected review papers. Over half of all papers in JVAT are based on technology of additives and modifiers for all classes of polymers: thermoset polymers and both condensation and addition thermoplastics. Papers on vinyl technology include PVC additives.