Supercritical CO2-assisted impregnation of cellulose microparticles with R-carvone: Effect of process variables on impregnation yield

Machado, Noelia D.; Mosquera, José E.; Martini, Raquel E.; Goñi, María L.; Gañán, Nicolás Alberto

doi:10.1016/j.supflu.2022.105671

Cited by 5 publications

(2 citation statements)

References 54 publications

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“…The Supercritical Solvent Impregnation (SSI) process is a modern technique with many applications on pharmaceutics that allows the incorporation of bioactive substances, such as nutraceuticals and drugs, inside polymers taking advantage of the excellent mass transport properties of SC-CO 2 that include high diffusivity and a surface tension close to zero [21]. The advantages of SSI include short processing time, no use of organic solvents, no waste generation, and low energy consumption [22][23][24]. Particularly, the SSI process has been used during the last decades as an alternative process to develop active ingredients for food packaging through the combination of antimicrobial or antioxidant substances in polymeric matrices for food packaging [25,26].…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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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“…Examples of scCO 2 -assisted impregnation include the impregnation process for the dyeing of synthetic and natural textiles [28,29], preparation of drug-eluting implants [30][31][32][33][34][35][36][37], softwood processing [38][39][40][41][42][43], the preparation of hybrid silk material [44] or for food packaging applications [45,46]. In the conservation field, supercritical CO 2 technology is still niche, with a few examples of application such as the cleaning of textiles [47][48][49][50][51], deacidification of paper [52][53][54][55][56] and the removal of pesticides from objects in ethnographic collections [57][58][59].…”

Section: Introductionmentioning

confidence: 99%

Proof-of-Concept Study on the Feasibility of Supercritical Carbon Dioxide-Assisted Consolidation Treatment for a Pair of Goalkeeper Gloves on Synthetic Latex-Based Foam Mock-Ups

Tomás Ferreira,

Bartoletti,

França de Sá

et al. 2024

Sustainability

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This work investigates the suitability of supercritical fluid technology for designing a safe, efficient and sustainable consolidation treatment for a pair of heavily degraded goalkeeper gloves. Traditional methods have revealed themselves as unsafe and inefficient, leading to material loss and a minimal enhancement of surface cohesion. To overcome these limitations, the use of supercritical carbon dioxide (scCO2) was explored in a treatment, where scCO2 behaves as a green solvent and consolidant carrier. In-depth and homogeneous application of the consolidant, without the need for direct contact with the foam material, was sought. As a proof of concept, the procedure was tested on samples that mimic the synthetic latex-based foam composition and condition of the object. Poly(vinyl acetate) was selected as a consolidant because its behaviour and solubility in scCO2 are known. Several experimental conditions were explored to assess the impact and feasibility of the scCO2-assisted consolidation procedure. Empirical observations, optical microscopy, scanning electron microscopy and infrared spectroscopy were used to monitor potential modifications in the samples and assess the treatment efficacy. The results highlighted the advantages and pitfalls of scCO2-assisted consolidation, paving the way for fine-tuning the process. It neither damaged the fragile surfaces of the foam samples nor increased material loss, which is an advantage compared to traditional treatments. The performed analysis suggested that homogeneous impregnation of the foams was achieved. This study might be a turning point in the conservation of foam-based museum objects, as the results indicate the suitability of the scCO2-assisted consolidation process as a non-toxic and more efficient alternative, being safer for the object.

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Enhanced mitigation of VOCs, CO2 and odour emissions from organic fraction of solid waste using innovative biodegradable patches generated by supercritical carbon dioxide impregnation

De Paola,

Mottola,

Oliva

et al. 2024

Case Studies in Chemical and Environmental Engineering

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Supercritical CO2-assisted impregnation of cellulose microparticles with R-carvone: Effect of process variables on impregnation yield

Cited by 5 publications

References 54 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

Proof-of-Concept Study on the Feasibility of Supercritical Carbon Dioxide-Assisted Consolidation Treatment for a Pair of Goalkeeper Gloves on Synthetic Latex-Based Foam Mock-Ups

Enhanced mitigation of VOCs, CO2 and odour emissions from organic fraction of solid waste using innovative biodegradable patches generated by supercritical carbon dioxide impregnation

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