Characterization of antimicrobial polylactic acid based films

Erdohan, Zekiye Özge; Çam, Belgizar Ayana; Turhan, K. Nazan

doi:10.1016/j.jfoodeng.2013.05.043

Cited by 91 publications

(51 citation statements)

References 30 publications

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“…Similar results were reported by Erdohan et al studying olive leaf extract addition influence on mechanical properties of PLA films [32]. The increase in E might be because the plasticizing effect caused by the addition of cinnamaldehyde to the polymer matrix resulting in the increase in ductile properties, which would also result in changes in the X c of materials.…”

Section: Mechanical Propertiessupporting

confidence: 84%

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Characterization of antimicrobial poly(lactic acid)/poly(trimethylene carbonate) films with cinnamaldehyde

2014

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Poly(lactic acid)/poly(trimethylene carbonate) (PLA/PTMC) films incorporated with cinnamaldehyde (0, 3, 6, 9, and 12 wt%) were prepared by solvent casting and characterized by physical, mechanical, and antimicrobial properties. SEM analysis revealed that the surface of film became rougher with certain porosity when cinnamaldehyde was incorporated into the PLA/PTMC blends. Cinnamaldehyde acted as plasticizers which reduce the intermolecular forces of polymer chains, thus improving the flexibility and extensibility of the films. Differential scanning calorimetry showed that the crystallinity of PLA phase decreased by the presence of cinnamaldehyde in the composite films. Water vapor permeability of films increased with the increase of cinnamaldehyde loading. However, the active PLA/PTMC/cinnamaldehyde composite films showed adequate barrier properties for food packaging application. Incorporation of cinnamaldehyde to the PLA/PTMC polymer matrix improved the antimicrobial activity of active packaging films. These results indicated that the best compromise between mechanical, barrier, thermal, and antimicrobial properties could be achieved by the addition of 9 wt% cinnamaldehyde into PLA/PTMC blends.

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Section: Mechanical Propertiessupporting

confidence: 84%

“…Film samples were tested for antimicrobial activity by the agar diffusion method or the liquid culture test. There was no agreement upon standard methods to determine the effectiveness of active antimicrobial films [32]. The liquid culture test was used in this study.…”

Section: Optical Propertiesmentioning

confidence: 99%

Characterization of antimicrobial poly(lactic acid)/poly(trimethylene carbonate) films with cinnamaldehyde

2014

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“…11 PLA films containing olive leaf extract as an antimicrobial agent have been found to be effective in cases of Staphylococcus aureus bacterial strains. 12 PLA antibacterial coatings can be used to reduce the pathogens on the surface of fruits such as apples. 13 Chlorhexidine-containing PLA-coated titanium works against different bacterial microbes, being more effective for dental implants.…”

Section: Introductionmentioning

confidence: 99%

Complex poly(lactic acid)-based biomaterial for urinary catheters: II. Biocompatibility

StoleruElena¹,

Bogdanel

Raluca³

et al. 2016

Bioinspired, Biomimetic and Nanobiomaterials

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The present paper is focused on the surface and bulk characterization of poly(lactic acid) (PLA)-based composites that contain hydrolyzed collagen as a biological polymer, silver nanoparticles and vitamin E and epoxidized soybean oil as a plasticizer. The bionanocomposites were obtained by melt processing and evaluated for structural and surface characteristics, biocompatibility, functional properties such as antimicrobial and antioxidant activity and hydrolytic degradation behavior. It has been established that the optimal composition to impart functional properties to the PLA matrix is a formulation containing 15% epoxidized soybean oil, 15% hydrolyzed collagen, 5% Pluronic, 5% vitamin E and 0·3% silver nanoparticles. This bionanocomposite inhibits the growth of both Gram-positive bacteria, Escherichia coli and Salmonella typhimurium, and Gram-negative bacteria, Listeria monocytogenes, and reaches 100% radical-scavenging activity. The PLA-based biomaterials obtained in this study are stable in biological media in the short and medium terms and therefore are recommended as multifunctional biomaterials for the manufacture of medical devices, such as urinary catheters.

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“…This leads to poor mechanical properties. Therefore, many studies to enhance the hydrophobicity of cellulose fillers by reactive modification have been reported …”

Section: Introductionmentioning

confidence: 99%

Physical properties of polypropylene composites with hydrophobized cellulose powder by soybean oil

Jang

Kim

2015

J of Applied Polymer Sci

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Cellulose materials have attracted lots of interest as potential natural fillers in the production of green polymer composites because they are ecofriendly and economic. In this study, to improve the interfacial bonding strength between cellulose powder and a hydrophobic polypropylene (PP) matrix, the surface hydrophobization of cellulose powder by soybean oil was carried out via a simple transesterification reaction procedure. Weight change measurements, Fourier transform infrared spectroscopy, and compatibility testing were used to quantitatively and qualitatively analyze the hydrophobization of the cellulose powder. By changing the hydrophobization conditions, the soybean oil content attached to the cellulose powder changed from 8.0 to 57.8%. PP composites with 20% of each hydrophobized cellulose powder were prepared by melt blending followed by compression molding. The mechanical properties of the PP composites were investigated with a universal testing machine and an Izod impact tester. Compared to the composite with pristine cellulose powder, the PP composite with the hydrophobized cellulose powder and an attached soybean oil content of 29.6% showed largely increased impact strength (46.3%), tensile strength (47.5%), and elongation at break (27.3%) values. The scanning electron microscopy images for the fracture surfaces of the composites showed that the hydrophobization induced much stronger interfacial bonding between the PP matrix and cellulose powder.

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Characterization of antimicrobial polylactic acid based films

Cited by 91 publications

References 30 publications

Characterization of antimicrobial poly(lactic acid)/poly(trimethylene carbonate) films with cinnamaldehyde

Characterization of antimicrobial poly(lactic acid)/poly(trimethylene carbonate) films with cinnamaldehyde

Complex poly(lactic acid)-based biomaterial for urinary catheters: II. Biocompatibility

Physical properties of polypropylene composites with hydrophobized cellulose powder by soybean oil

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