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Machado ND, Mosquera JE, Cejudo-Bastante C, Goñi ML, Martini RE, Gañán NA, Mantell-Serrano C, Casas-Cardoso L. Supercritical Impregnation of PETG with Olea europaea Leaf Extract: Influence of Operational Parameters on Expansion Degree, Antioxidant and Mechanical Properties. Polymers (Basel) 2024; 16:1567. [PMID: 38891513 PMCID: PMC11174583 DOI: 10.3390/polym16111567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2024] [Revised: 05/28/2024] [Accepted: 05/29/2024] [Indexed: 06/21/2024] Open
Abstract
PETG (poly(ethylene glycol-co-cyclohexane-1,4-dimethanol terephthalate)) is an amorphous copolymer, biocompatible, recyclable, and versatile. Nowadays, it is being actively researched for biomedical applications. However, proposals of PETG as a platform for the loading of bioactive compounds from natural extract are scarce, as well as the effect of the supercritical impregnation on this polymer. In this work, the supercritical impregnation of PETG filaments with Olea europaea leaf extract was investigated, evaluating the effect of pressure (100-400 bar), temperature (35-55 °C), and depressurization rate (5-50 bar min-1) on the expansion degree, antioxidant activity, and mechanical properties of the resulting filaments. PETG expansion degree ranged from ~3 to 120%, with antioxidant loading ranging from 2.28 to 17.96 g per 100 g of polymer, corresponding to oxidation inhibition values of 7.65 and 66.55%, respectively. The temperature and the binary interaction between pressure and depressurization rate most affected these properties. The mechanical properties of PETG filaments depended greatly on process variables. Tensile strength values were similar or lower than the untreated filaments. Young's modulus and elongation at break values decreased below ~1000 MPa and ~10%, respectively, after the scCO2 treatment and impregnation. The extent of this decrease depended on the supercritical operational parameters. Therefore, filaments with higher antioxidant activity and different expansion degrees and mechanical properties were obtained by adjusting the supercritical processing conditions.
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Affiliation(s)
- Noelia D. Machado
- Chemical Engineering and Food Technology Department, Faculty of Science, Wine and Agrifood Research Institute (IVAGRO), University of Cadiz, Avda. República Saharaui, s/n, 11510 Puerto Real, Spain; (C.C.-B.); (C.M.-S.); (L.C.-C.)
| | - José E. Mosquera
- Centre de Recherche de Royallieu, Laboratoire Transformations Intégrées de la Matière Renouvelable (TIMR), Ecole Supérieure de Chimie Organique et Minérale (ESCOM), Université de Technologie de Compiègne, Rue du Docteur Schweitzer CS 60319, 60203 Compiègne, France;
| | - Cristina Cejudo-Bastante
- Chemical Engineering and Food Technology Department, Faculty of Science, Wine and Agrifood Research Institute (IVAGRO), University of Cadiz, Avda. República Saharaui, s/n, 11510 Puerto Real, Spain; (C.C.-B.); (C.M.-S.); (L.C.-C.)
| | - María L. Goñi
- Instituto de Investigación y Desarrollo en Ingeniería de Procesos y Química Aplicada (IPQA–UNC–CONICET), Av. Vélez Sarsfield 1611, Córdoba X5016GCA, Argentina; (M.L.G.); (R.E.M.); (N.A.G.)
- Instituto de Ciencia y Tecnología de los Alimentos, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba (ICTA–FCEFyN–UNC), Av. Vélez Sarsfield 1611, Córdoba X5016GCA, Argentina
| | - Raquel E. Martini
- Instituto de Investigación y Desarrollo en Ingeniería de Procesos y Química Aplicada (IPQA–UNC–CONICET), Av. Vélez Sarsfield 1611, Córdoba X5016GCA, Argentina; (M.L.G.); (R.E.M.); (N.A.G.)
- Instituto de Ciencia y Tecnología de los Alimentos, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba (ICTA–FCEFyN–UNC), Av. Vélez Sarsfield 1611, Córdoba X5016GCA, Argentina
| | - Nicolás A. Gañán
- Instituto de Investigación y Desarrollo en Ingeniería de Procesos y Química Aplicada (IPQA–UNC–CONICET), Av. Vélez Sarsfield 1611, Córdoba X5016GCA, Argentina; (M.L.G.); (R.E.M.); (N.A.G.)
- Instituto de Ciencia y Tecnología de los Alimentos, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba (ICTA–FCEFyN–UNC), Av. Vélez Sarsfield 1611, Córdoba X5016GCA, Argentina
| | - Casimiro Mantell-Serrano
- Chemical Engineering and Food Technology Department, Faculty of Science, Wine and Agrifood Research Institute (IVAGRO), University of Cadiz, Avda. República Saharaui, s/n, 11510 Puerto Real, Spain; (C.C.-B.); (C.M.-S.); (L.C.-C.)
| | - Lourdes Casas-Cardoso
- Chemical Engineering and Food Technology Department, Faculty of Science, Wine and Agrifood Research Institute (IVAGRO), University of Cadiz, Avda. República Saharaui, s/n, 11510 Puerto Real, Spain; (C.C.-B.); (C.M.-S.); (L.C.-C.)
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Milovanovic S, Lukic I, Horvat G, Novak Z, Frerich S, Petermann M, García-González CA. Green Processing of Neat Poly(lactic acid) Using Carbon Dioxide under Elevated Pressure for Preparation of Advanced Materials: A Review (2012-2022). Polymers (Basel) 2023; 15:polym15040860. [PMID: 36850144 PMCID: PMC9960451 DOI: 10.3390/polym15040860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 02/03/2023] [Accepted: 02/07/2023] [Indexed: 02/12/2023] Open
Abstract
This review provides a concise overview of up-to-date developments in the processing of neat poly(lactic acid) (PLA), improvement in its properties, and preparation of advanced materials using a green medium (CO2 under elevated pressure). Pressurized CO2 in the dense and supercritical state is a superior alternative medium to organic solvents, as it is easily available, fully recyclable, has easily tunable properties, and can be completely removed from the final material without post-processing steps. This review summarizes the state of the art on PLA drying, impregnation, foaming, and particle generation by the employment of dense and supercritical CO2 for the development of new materials. An analysis of the effect of processing methods on the final material properties was focused on neat PLA and PLA with an addition of natural bioactive components. It was demonstrated that CO2-assisted processes enable the control of PLA properties, reduce operating times, and require less energy compared to conventional ones. The described environmentally friendly processing techniques and the versatility of PLA were employed for the preparation of foams, aerogels, scaffolds, microparticles, and nanoparticles, as well as bioactive materials. These PLA-based materials can find application in tissue engineering, drug delivery, active food packaging, compostable packaging, wastewater treatment, or thermal insulation, among others.
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Affiliation(s)
- Stoja Milovanovic
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia
- Łukasiewicz Research Network—New Chemical Syntheses Institute, Al. Tysiąclecia Państwa Polskiego 13a, 24-110 Puławy, Poland
- Correspondence: (S.M.); (I.L.)
| | - Ivana Lukic
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia
- Correspondence: (S.M.); (I.L.)
| | - Gabrijela Horvat
- Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia
| | - Zoran Novak
- Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia
| | - Sulamith Frerich
- Faculty of Mechanical Engineering, Institute of Thermo and Fluid Dynamics, Ruhr-University Bochum, Universitätsstraße 150, 44801 Bochum, Germany
| | - Marcus Petermann
- Faculty of Mechanical Engineering, Institute of Thermo and Fluid Dynamics, Ruhr-University Bochum, Universitätsstraße 150, 44801 Bochum, Germany
| | - Carlos A. García-González
- I+D Farma Group (GI-1645), Department of Pharmacology, Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, iMATUS and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
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Zhou G, Liu W, Yin H, Zhang Y, Huang C. Effect of nano‐sized zinc citrate on the supercritical carbon dioxide‐assisted extrusion foaming behavior of poly(lactic acid). J Appl Polym Sci 2023. [DOI: 10.1002/app.53561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Gang Zhou
- School of Chemistry and Materials Engineering Wenzhou University Wenzhou China
| | - Wenjun Liu
- Institute of New Materials & Industry Technology Wenzhou University Wenzhou China
| | - Haiyan Yin
- Biomaterials Division, Wenzhou Institute University of Chinese Academy of Sciences Wenzhou China
| | - Yinhang Zhang
- School of Chemistry and Materials Engineering Wenzhou University Wenzhou China
| | - Chengzhe Huang
- School of Chemistry and Materials Engineering Wenzhou University Wenzhou China
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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. Processes (Basel) 2022. [DOI: 10.3390/pr11010011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
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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Supercritical CO2-assisted Impregnation/Deposition of Polymeric Materials With Pharmaceutical, Nutraceutical, and Biomedical Applications: A Review (2015-2021). J Supercrit Fluids 2022. [DOI: 10.1016/j.supflu.2022.105763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Supercritical Fluid Extraction from Zataria multiflora Boiss and Impregnation of Bioactive Compounds in PLA for the Development of Materials with Antibacterial Properties. Processes (Basel) 2022. [DOI: 10.3390/pr10091787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
In this research, the extraction with supercritical carbon dioxide (SC-CO2) and the subsequent impregnation of the extracted bioactive compounds from Zataria multiflora Boiss (Z. multiflora) into polylactic acid (PLA) films was investigated. The effects of temperature (318 and 338 K), pressure (15 and 25 MPa) and cosolvent presence (0 and 3 mol%) on the extraction yield were studied. The SC-CO2 assisted impregnation runs were carried out in a discontinuous mode at different pressure (15 and 25 MPa), temperature (318 and 328 K), and time (2 and 8 h) values, using 0.5 MPa min−1 as a constant value of depressurization rate. ANOVA results confirmed that pressure, temperature, and time influenced the extraction yield. Moreover, antioxidant activities of extracts of Z. multiflora were evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assays. In addition, the antibacterial activities of the extracts were screened against standard strains of Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). The results of this investigation indicated that extracts obtained from the aerial parts of Z. multiflora possessed antioxidant and antibacterial properties. The impregnated samples presented strong antibacterial activity against the selected microorganisms.
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Supercritical Impregnation of Mango Leaf Extract into PLA 3D-Printed Devices and Evaluation of Their Biocompatibility with Endothelial Cell Cultures. Polymers (Basel) 2022; 14:polym14132706. [PMID: 35808751 PMCID: PMC9269286 DOI: 10.3390/polym14132706] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 06/20/2022] [Accepted: 06/27/2022] [Indexed: 02/04/2023] Open
Abstract
The addition of natural substances with pharmacoactive properties to polymeric biomedical devices would provide beneficial regarding the assimilation of these endoprostheses when implanted into a patient’s body. The added drug would facilitate endothelization by regulating the inflammatory processes that such interventions entail, preventing contamination hazards and favoring the angiogenesis or formation of blood vessels in the tissue. The present work used mango leaf extract (MLE) obtained through pressurized ethanol for this purpose. Polylactic acid (PLA) in the form of filaments or 3D-printed disks was impregnated by means of supercritical technology with MLE for the culture essays. The release kinetics has been studied and the polymer matrices have been examined by scanning electron microscopy (SEM). The impregnated devices were subjected to in vitro culture of colony-forming endothelial cells. The influence of the different impregnation conditions used for the production of the MLE impregnated polymeric devices on the development of the cell culture was determined by fluorescence microscopy. The best results were obtained from the calcein cultures on 35 °C MLE impregnated into 3D-printed polymer disks.
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