Supercritical CO2-assisted impregnation of LDPE/sepiolite nanocomposite films with insecticidal terpene ketones: Impregnation yield, crystallinity and mechanical properties assessment

Goñi, María L.; Gañán, Nicolás Alberto; Barbosa, Silvia Elena; Strumia, Miriam Cristina; Martini, Raquel E.

doi:10.1016/j.supflu.2017.06.013

Cited by 23 publications

(5 citation statements)

References 48 publications

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“…Figure 6b shows the positive effect of increasing the impregnation time on the impregnation yield of rosemary essential oil in LLDPE films at constant pressure and temperature due to the increase of the swelling and flexibility of the polymer by increasing the impregnation time. A comparable behavior has been seen for the impregnation of styrene in LDPE films [66], thymoquinone and R-(+)-pulegone in LDPE/sepiolite films [38], clove essential oil in LLDPE films [27], an active mixture of thymoquinone and R-(+)-pulegone in LDPE films [36], and for the impregnation of mango polyphenols in a multilayer PET/PP food-grade film [39]. This behavior can be related to the increase of swelling and flexibility of the polymer by increasing the impregnation time, which improves the diffusion of CO 2 and the bioactive molecules through the polymeric structure.…”

Section: Fourier Transform Infrared (Ftir) Spectroscopysupporting

confidence: 74%

“…The maximum clove essential oil loading in LLDPE with different operating conditions was 40.2 mg/g by Medeiros et al [27]. Goñi et al investigated the effect of pressure, temperature, time and depressurization rate in the SC-CO 2 -assisted impregnation of terpene ketones in LDPE/sepiolite nanocomposite films, reporting the highest impregnation (9.73 wt.%) at 9 MPa, 45 • C, 4 h, and 0.5 MPa/min [38]. Figure 5 shows the results for the rosemary essential oil extract impregnation predicted by the model versus the experimental values.…”

Section: Supercritical Solvent Impregnation Of Rosemary Essential Oil...mentioning

confidence: 99%

“…The impregnation process has been studied for the incorporation of clove essential oil in linear low-density polyethylene (LLDPE) films [27], cinnamaldehyde in poly(lactic acid) (PLA) films [28], thymol in poly(lactic acid) /Polycaprolactone (PLA/PCL) films [29], lycopene in hydrolyzed collagen [30], lavandin essential oil in octenyl succinic anhydride (OSA) modified starch produced from waxy maize [31], chia oil in soy protein [32], Pulicaria jaubertii in gum arabic [33], eugenol in LLDPE films [34], carvone in PLA films [35], a mixture of two terpene ketones in low density polyethylene (LDPE) films [36], cinnamaldehyde into cassava starch films [37], terpene ketones with insecticidal properties in LDPE/sepiolite nanocomposite films [38], antioxidant mango polyphenols into polyethylene terephthalate (PET)/Polypropylene (PP) films [39], olive leaf extract polyphenols charged into PET/PP films [40], eugenol into polyamide fibers [41], LDPE films loaded with carvone [42], PLA films with thymol [43], ibuprofen into poly(methyl methacrylate) (PMMA) films [44], mefenamic acid in PMMA [45], carvacrol in composite PCL [46], and Zataria multiflora Impregnation in PLA films [47]. In all the conducted studies pressure, temperature, time, and depressurization rate were considered as the parameters affecting the SSI process efficiency.…”

Section: Introductionmentioning

confidence: 99%

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Effect of the Processing Conditions on the Supercritical Extraction and Impregnation of Rosemary Essential Oil in Linear Low-Density Polyethylene Films

et al. 2022

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The supercritical fluid extraction of essential oil from rosemary leaves and its subsequent impregnation in linear low-density polyethylene (LLDPE) films were studied. The effects of temperature (318 and 338 K), pressure (15 and 25 MPa) and rosemary particle size (0.9 and 0.15 mm) on the extraction yield were investigated. Impregnation assays were developed at two different values of pressure (12 and 20 MPa), temperature (308 and 328 K), and impregnation time (1 and 5 h). The extraction yield of rosemary essential oil was increased by increasing pressure and decreasing particle size and temperature. ANOVA results showed that temperature, pressure, and time significantly impacted the essential oil impregnation yield in LLDPE films. The maximum impregnation yield (1.87 wt. %) was obtained at 12 MPa, 328 K, and 5 h. The antioxidant activity and the physical-mechanical properties of impregnated films were analyzed. The IC50 values for all the impregnated LLDPE samples were close to the IC50 value of the extract showing that the impregnated films have a significant antioxidant activity.

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Section: Fourier Transform Infrared (Ftir) Spectroscopysupporting

confidence: 74%

Section: Supercritical Solvent Impregnation Of Rosemary Essential Oil...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of the Processing Conditions on the Supercritical Extraction and Impregnation of Rosemary Essential Oil in Linear Low-Density Polyethylene Films

et al. 2022

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“…This may be due to a hydrogen bonds between PET and OLE which can strengthen the polymer chains and increase the load required to break the polymer film under tension [65] and this is consistent with the findings of the FTIR and DSC analysis. In other systems, the impregnation process has been shown to have little impact on the ductility and mechanical strength of polymer films [89].…”

Section: Tensile Strengthmentioning

confidence: 99%

Effect of supercritical CO2 and olive leaf extract on the structural, thermal and mechanical properties of an impregnated food packaging film

Cejudo-Bastante

Cran

Casas

et al. 2019

The Journal of Supercritical Fluids

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Poly(ethylene terephthalate)/polypropylene (PET/PP) films containing olive leaf extract (OLE) were obtained by supercritical solvent impregnation (SSI) in batch (BM) and semi-continuous (SM) modes.The study focused on the impact of pressure, temperature, CO2 flow and OLE on the properties of the impregnated films. Thermal analysis of non-impregnated samples revealed a decrease in the crystallinity of PP layer treated at 35 ºC and an increase in the Tg of PET treated at 55 ºC due to CO2 sorption. In impregnated samples, high pressures caused a decrease in the crystallinity of PP layer, whereas PET layer remained unaffected. Higher pressures favour impregnation in BM, whereas different trends were found for SM impregnations. Although the film properties were not compromised after impregnation, the CO2 stream used in SM slightly weakened the impregnated films. Overall, conditions of 400 bar and 35ºC in BM were favorable for producing highly antioxidant films with minor structural modifications.

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“…In the case of our considerations, the matrix will be a polymer. The impregnation process is possible when the active substance is well-soluble in the supercritical fluid; the polymer swells in contact with the supercritical fluid, and there is a favorable partition coefficient so as to apply as much of the active substance to the matrix as possible [ 87 , 88 , 89 , 90 , 91 , 92 ]. The impregnation process is most often used in the medical industry, resulting in drug carriers and other pharmaceuticals [ 92 , 93 , 94 , 95 , 96 , 97 , 98 , 99 , 100 , 101 ].…”

Section: Impregnation and Plasticizationmentioning

confidence: 99%

Application of Fluids in Supercritical Conditions in the Polymer Industry

et al. 2021

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This article reviews the use of fluids under supercritical conditions in processes related to the modern and innovative polymer industry. The most important processes using supercritical fluids are: extraction, particle formation, micronization, encapsulation, impregnation, polymerization and foaming. This review article briefly describes and characterizes the individual processes, with a focus on extraction, micronization, particle formation and encapsulation. The methods mentioned focus on modifications in the scope of conducting processes in a more ecological manner and showing higher quality efficiency. Nowadays, due to the growing trend of ecological solutions in the chemical industry, we see more and more advanced technological solutions. Less toxic fluids under supercritical conditions can be used as an ecological alternative to organic solvents widely used in the polymer industry. The use of supercritical conditions to conduct these processes creates new opportunities for obtaining materials and products with specialized applications, in particular in the medical, pharmacological, cosmetic and food industries, based on substances of natural sources. The considerations contained in this article are intended to increase the awareness of the need to change the existing techniques. In particular, the importance of using supercritical fluids in more industrial methods and for the development of already known processes, as well as creating new solutions with their use, should be emphasized.

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Supercritical CO2-assisted impregnation of LDPE/sepiolite nanocomposite films with insecticidal terpene ketones: Impregnation yield, crystallinity and mechanical properties assessment

Cited by 23 publications

References 48 publications

Effect of the Processing Conditions on the Supercritical Extraction and Impregnation of Rosemary Essential Oil in Linear Low-Density Polyethylene Films

Effect of the Processing Conditions on the Supercritical Extraction and Impregnation of Rosemary Essential Oil in Linear Low-Density Polyethylene Films

Effect of supercritical CO2 and olive leaf extract on the structural, thermal and mechanical properties of an impregnated food packaging film

Application of Fluids in Supercritical Conditions in the Polymer Industry

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