Supercritical CO2 impregnation of PLA/PCL films with natural substances for bacterial growth control in food packaging

Milovanović, Stoja; Hollermann, Gesa; Errenst, Cornelia; Pajnik, Jelena; Frerich, Sulamith; Kroll, Stephen; Rezwan, Kurosch; Ivanović, Jasna

doi:10.1016/j.foodres.2018.02.065

Cited by 88 publications

(80 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Antimicrobials and antioxidants can be directly incorporated into the polymer to create active packaging in which the bioactive substance interacts directly with the food or with the headspace, thereby reducing or completely inhibiting the growth of spoilage and pathogenic microorganisms [272]. PLA/PCL films impregnated with thymol or thyme extract are examples of active PLA-based packaging with antibacterial activity [273].…”

Section: Polylactic Acidmentioning

confidence: 99%

Recent Advances in Bioplastics: Application and Biodegradation

et al. 2020

View full text Add to dashboard Cite

The success of oil-based plastics and the continued growth of production and utilisation can be attributed to their cost, durability, strength to weight ratio, and eight contributions to the ease of everyday life. However, their mainly single use, durability and recalcitrant nature have led to a substantial increase of plastics as a fraction of municipal solid waste. The need to substitute single use products that are not easy to collect has inspired a lot of research towards finding sustainable replacements for oil-based plastics. In addition, specific physicochemical, biological, and degradation properties of biodegradable polymers have made them attractive materials for biomedical applications. This review summarises the advances in drug delivery systems, specifically design of nanoparticles based on the biodegradable polymers. We also discuss the research performed in the area of biophotonics and challenges and opportunities brought by the design and application of biodegradable polymers in tissue engineering. We then discuss state-of-the-art research in the design and application of biodegradable polymers in packaging and emphasise the advances in smart packaging development. Finally, we provide an overview of the biodegradation of these polymers and composites in managed and unmanaged environments.

show abstract

Section: Polylactic Acidmentioning

confidence: 99%

Recent Advances in Bioplastics: Application and Biodegradation

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The operating pressure and temperature conditions were chosen according to reported liquidvapour transitions in the clove oil(eugenol)/scCO 2 system within temperature and pressure ranges of 35-45 °C and 10-15 MPa, respectively [52]. Impregnation time was varied from 2 h to 18 h. These times were selected as representative for short, moderately long and long processing of polymeric samples with SSI process according to our previous studies [45,49,51]. The mass ratio of film/clove oil in all the experiments was 1:10.…”

Section: Supercritical Solvent Impregnationmentioning

confidence: 99%

“…Depressurization of the system enables fast and complete phase separation by transition of scCO 2 into gaseous state, resulting in a final product free of solvent traces. The SSI has been used to load poly(lactic acid) and polyethylene and cassava starch films with natural substances with antimicrobial and antioxidant activities present in essential oils (thymol and cinnamaldehyde) [44,[46][47][48][49] for active food packaging. The SSI was also reported for efficient loading of bark essential oil from Thujopsis dolabrata var.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Supercritical CO2 impregnation of Gelatin-Chitosan films with clove essential oil and characterization thereof

Radović¹,

Adamović

Pavlović³

et al. 2019

CI&CEQ

Self Cite

View full text Add to dashboard Cite

is the first study on supercritical impregnation of G/Ch films with clove oil (CO) • CO in films was affected by CO2 pressure, impregnation time and G:Ch ratio • CO loading was favoured at 10-20 MPa, impregnation time of 2-6 h and Gwt% 25-50% • ScCO 2 treatment had the highest plasticizing effect on G/Ch50:50 • Thermal stability of the G/Ch film with 56 mg CO/g film to 110 °C was demonstrated Abstract Supercritical CO 2 impregnation process was used for the first time to fabricate biodegradable gelatin-chitosan (G/Ch) films containing clove oil (CO) for potential use in active food packaging. All the impregnations were carried out at moderately low temperature (40 °C). Aiming to maximize CO loading in the films with acceptable morphological, structural and thermal properties, CO 2 pressure, impregnation time and G:Ch mass ratio were varied. Gelatin fraction in the films of 25-50 wt.%, scCO 2 pressures of 10-20 MPa and impregnation time of 2-6 h impregnation favoured the CO loading. Processing of the film with equal gelatin to chitosan mass ratio (G/Ch 50:50) at 10 MPa for 2 h yielded sufficiently high loading (56 mg CO/g film) without an adverse effect on morphological properties. The G/Ch 50:50 film was therefore chosen for structural and thermal analyses. ATR-FTIR analysis confirmed successful CO incorporation into the G/Ch 50:50 and its interaction with the film. Plasticizing effect of scCO 2 and CO on the film was evidenced by DSC. Incorporation of 56 mg CO/g film into the G/Ch 50:50 didn't affect thermal stability of the film. Beside environmental benefits, supercritical impregnation process enables fast fabrication of G/Ch bio-composite films containing CO, thermally stable to 110 °C, which is suitable for most of food packaging applications.

show abstract

“…SSI was also applied to the impregnation of PET/PP films with antioxidants extracted from olive leaves [ 31 ]. Besides, biodegradable polymers such as poly-lacticacid (PLA) [ 32 ] and PLA with 5% of poly(ε-caprolactone) [ 33 ] were impregnated with thymol by using the same technique. Furthermore, cellulose acetate films impregnated with thymol by SSI exhibited excellent anti-biofilm activity against P. aeruginosa and S. aureus [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

Application of Supercritical Solvent Impregnation for Production of Zeolite Modified Starch-Chitosan Polymers with Antibacterial Properties

et al. 2020

Self Cite

View full text Add to dashboard Cite

In the present study, supercritical solvent impregnation (SSI) has been applied to incorporate thymol into bio-composite polymers as a potential active packaging material. Thymol, a natural component with a proven antimicrobial activity, was successfully impregnated into starch-chitosan (SC) and starch-chitosan-zeolite (SCZ) films using supercritical carbon dioxide (scCO2) as a solvent. Experiments were performed at 35 °C, pressures of 15.5 and 30 MPa, and an impregnation time in the range of 4–24 h. The highest impregnation yields of SC films with starch to chitosan mass ratios of 1:1 and 1:2 were 10.80% and 6.48%, respectively. The addition of natural zeolite (15–60%) significantly increased the loading capacity of films enabling thymol incorporation in a quantity of 16.7–27.3%. FTIR and SEM analyses were applied for the characterization of the films. Mechanical properties and water vapor permeability of films before and after the impregnation were tested as well. Thymol release kinetics in deionized water was followed and modeled by the Korsmeyer-Peppas and Weibull model. SCZ films with thymol loading of approximately 24% exhibited strong antibacterial activity against E. coli and methicillin-resistant Staphylococcus (S.) aureus (MRSA).

show abstract

Supercritical CO2 impregnation of PLA/PCL films with natural substances for bacterial growth control in food packaging

Cited by 88 publications

References 54 publications

Recent Advances in Bioplastics: Application and Biodegradation

Recent Advances in Bioplastics: Application and Biodegradation

Supercritical CO2 impregnation of Gelatin-Chitosan films with clove essential oil and characterization thereof

Application of Supercritical Solvent Impregnation for Production of Zeolite Modified Starch-Chitosan Polymers with Antibacterial Properties

Contact Info

Product

Resources

About