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Miscibility of Poly(lactide-co-glycolide) in Supercritical Fluids. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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2
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Supercritical CO2-assisted impregnation of polylactic acid films with R-carvone: Effect of processing on loading, mass transfer kinetics, and final properties. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.102029] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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de França JOC, da Silva Valadares D, Paiva MF, Dias SCL, Dias JA. Polymers Based on PLA from Synthesis Using D,L-Lactic Acid (or Racemic Lactide) and Some Biomedical Applications: A Short Review. Polymers (Basel) 2022; 14:polym14122317. [PMID: 35745893 PMCID: PMC9229942 DOI: 10.3390/polym14122317] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 05/30/2022] [Accepted: 05/31/2022] [Indexed: 02/01/2023] Open
Abstract
Poly(lactic acid) (PLA) is an important polymer that is based on renewable biomass resources. Because of environmental issues, more renewable sources for polymers synthesis have been sought for industrial purposes. In this sense, cheaper monomers should be used to facilitate better utilization of less valuable chemicals and therefore granting more sustainable processes. Some points are raised about the need to study the total degradability of any PLA, which may require specific composting conditions (e.g., temperature, type of microorganism, adequate humidity and aerobic environment). Polymerization processes to produce PLA are presented with an emphasis on D,L-lactic acid (or rac-lactide) as the reactant monomer. The syntheses involving homogeneous and heterogeneous catalytic processes to produce poly(D,L-Lactic acid) (PDLLA) are also addressed. Additionally, the production of blends, copolymers, and composites with PDLLA are also presented exemplifying different preparation methods. Some general applications of these materials mostly dedicated to the biomedical area over the last 10–15 years will be pointed out.
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Affiliation(s)
| | | | | | | | - José Alves Dias
- Correspondence: (S.C.L.D.); (J.A.D.); Tel.: +55-61-3107-3846 (J.A.D.); Fax: 55-61-3107-3900 (J.A.D.)
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Zimnyakov D, Alonova M, Ushakova E, Volchkov S, Ushakova O, Klimov D, Slavnetskov I, Kalacheva A. Speckle-Based Sensing of Microscopic Dynamics in Expanding Polymer Foams: Application of the Stacked Speckle History Technique. SENSORS 2021; 21:s21206701. [PMID: 34695916 PMCID: PMC8538063 DOI: 10.3390/s21206701] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 10/03/2021] [Accepted: 10/04/2021] [Indexed: 11/16/2022]
Abstract
Microscopic structural rearrangements in expanding polylactide foams were probed using multiple dynamic scattering of laser radiation in the foam volume. Formation and subsequent expansion of polylactide foams was provided by a rapid or slow depressurization of the "plasticized polylactide-supercritical carbon dioxide" system. Dynamic speckles induced by a multiple scattering of laser radiation in the expanding foam were analyzed using the stacked speckle history technique, which is based on a joint mapping of spatial-temporal dynamics of evolving speckle patterns. A significant decrease in the depressurization rate in the case of transition from a rapid to slow foaming (from 0.03 MPa/s to 0.006 MPa/s) causes dramatic changes in the texture of the synthesized stacked speckle history maps. These changes are associated with transition from the boiling dynamics of time-varying speckles to their pronounced translational motions and are manifested as significant slopes of individual speckle traces on the recovered stacked speckle history maps. This feature is interpreted in terms of the actual absence of a new cell nucleation effect in the expanding foam upon slow depressurization on the dynamic scattering of laser radiation.
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Affiliation(s)
- Dmitry Zimnyakov
- Physics Department, Yury Gagarin State Technical University of Saratov, 77 Polytechnicheskaya st., 410054 Saratov, Russia; (M.A.); (E.U.); (S.V.); (O.U.); (D.K.); (I.S.); (A.K.)
- Precision Mechanics and Control Institute of Russian Academy of Sciences, 24 Rabochaya st., 410024 Saratov, Russia
- Correspondence: ; Tel.: +7-845-299-8624
| | - Marina Alonova
- Physics Department, Yury Gagarin State Technical University of Saratov, 77 Polytechnicheskaya st., 410054 Saratov, Russia; (M.A.); (E.U.); (S.V.); (O.U.); (D.K.); (I.S.); (A.K.)
| | - Ekaterina Ushakova
- Physics Department, Yury Gagarin State Technical University of Saratov, 77 Polytechnicheskaya st., 410054 Saratov, Russia; (M.A.); (E.U.); (S.V.); (O.U.); (D.K.); (I.S.); (A.K.)
| | - Sergey Volchkov
- Physics Department, Yury Gagarin State Technical University of Saratov, 77 Polytechnicheskaya st., 410054 Saratov, Russia; (M.A.); (E.U.); (S.V.); (O.U.); (D.K.); (I.S.); (A.K.)
| | - Olga Ushakova
- Physics Department, Yury Gagarin State Technical University of Saratov, 77 Polytechnicheskaya st., 410054 Saratov, Russia; (M.A.); (E.U.); (S.V.); (O.U.); (D.K.); (I.S.); (A.K.)
| | - Daniil Klimov
- Physics Department, Yury Gagarin State Technical University of Saratov, 77 Polytechnicheskaya st., 410054 Saratov, Russia; (M.A.); (E.U.); (S.V.); (O.U.); (D.K.); (I.S.); (A.K.)
| | - Ilya Slavnetskov
- Physics Department, Yury Gagarin State Technical University of Saratov, 77 Polytechnicheskaya st., 410054 Saratov, Russia; (M.A.); (E.U.); (S.V.); (O.U.); (D.K.); (I.S.); (A.K.)
| | - Anna Kalacheva
- Physics Department, Yury Gagarin State Technical University of Saratov, 77 Polytechnicheskaya st., 410054 Saratov, Russia; (M.A.); (E.U.); (S.V.); (O.U.); (D.K.); (I.S.); (A.K.)
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Verano Naranjo L, Cejudo Bastante C, Casas Cardoso L, Mantell Serrano C, Martínez de la Ossa Fernández EJ. Supercritical Impregnation of Ketoprofen into Polylactic Acid for Biomedical Application: Analysis and Modeling of the Release Kinetic. Polymers (Basel) 2021; 13:polym13121982. [PMID: 34204192 PMCID: PMC8235655 DOI: 10.3390/polym13121982] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 06/13/2021] [Accepted: 06/14/2021] [Indexed: 02/06/2023] Open
Abstract
Ketoprofen (KET) is an anti-inflammatory drug often used in medicine due to its analgesic and antipyretic effects. If it is administered in a controlled form by means of different dosing devices, it acts throughout the patient’s recovery period improving its efficacy. This study intends to support the use of supercritical solvent impregnation (SSI) as an efficient technique to develop polylactic acid (PLA) functionalized with ketoprofen, for use as controlled drug release devices. For this purpose, firstly, the influence of different SSI variables on the desirable swelling of the polymer structure, while avoiding their foaming, were evaluated. Then, the resulting ketoprofen loading was evaluated under different pressure/temperature conditions. It was generally found that as pressure and temperature are higher, the drug impregnation loads also increase. The maximum impregnation loads (at about 9% KET/PLA) were obtained at 200 bar and 75 °C. In vitro drug release tests of the impregnated compound were also carried out, and it was found that drug release profiles were also dependent on the specific pressure and temperature conditions used for the impregnation of each polymer filament.
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Golubeva EN, Chumakova NA. Spin Probe Method for Diagnostics of Polyester Porous Matrixes Formed in Supercritical Carbon Dioxide (Review). RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2020. [DOI: 10.1134/s1990793119070078] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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8
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Álvarez I, Gutiérrez C, de Lucas A, Rodríguez J, García M. Measurement, correlation and modelling of high-pressure phase equilibrium of PLGA solutions in CO2. J Supercrit Fluids 2020. [DOI: 10.1016/j.supflu.2019.104637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Yu K, Zhou H, Wang X, Du Z, Mi J. From thermodynamics to kinetics: Theoretical study of CO2 dissolving in poly (lactic acid) melt. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.02.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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10
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Fernández-Ronco MP, Hufenus R, Heuberger M. Effect of pressurized CO2 and N2 on the rheology of PLA. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2018.10.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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11
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Milovanovic S, Markovic D, Mrakovic A, Kuska R, Zizovic I, Frerich S, Ivanovic J. Supercritical CO 2 - assisted production of PLA and PLGA foams for controlled thymol release. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 99:394-404. [PMID: 30889714 DOI: 10.1016/j.msec.2019.01.106] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 11/21/2018] [Accepted: 01/23/2019] [Indexed: 12/19/2022]
Abstract
Amorphous, medical grade poly(d,l-lactic acid) (PLA) and poly(d,l-lactic-co-glycolic acid) (PLGA) were used to develop systems for controlled release of a natural bioactive substance - thymol. Supercritical carbon dioxide (scCO2) was successfully used both as an impregnation medium for thymol incorporation into the polymer matrix and a foaming agent in a single-step batch process. Impregnation of samples using low to moderate scCO2 densities (273 kg/m3 and 630 kg/m3) and short processing times (2 h and 4 h) enabled thymol loading of 0.92%-6.62% and formation of microcellular foams upon system depressurization. Thymol effect on structural and thermal properties on foamed samples was proven by FTIR and DSC. The effect of CO2 under elevated pressure on the neat polymers was analysed by high pressure DSC. Foaming of polymers with lower molecular weight by CO2 of higher density yielded foams with smaller pores. All tested foams released thymol in a controlled manner in phosphate buffered saline (PBS) at 37 °C within 3 to 6 weeks. Higher loading and lower cell density favoured thymol release rate, while its concentration in PBS for the tested period depended on foam interaction with the medium. Representative PLGA foam sample with the highest thymol loading (6.62%) showed controlled thymol release within 72 h in mediums having pH values from 1.1 to 7.4.
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Affiliation(s)
- Stoja Milovanovic
- University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11000 Belgrade, Serbia
| | - Darka Markovic
- University of Belgrade, Innovation Centre of Faculty of Technology and Metallurgy, Karnegijeva 4, 11000 Belgrade, Serbia
| | - Ana Mrakovic
- Vinča Institute of Nuclear Sciences, Department of Theoretical and Condensed Matter Physics, 11001 Belgrade, Serbia
| | - Robert Kuska
- Ruhr-University Bochum, Institute of Thermo and Fluid Dynamics, Universitätsstraβe 150, 44801 Bochum, Germany
| | - Irena Zizovic
- Wroclaw University of Science and Technology, Faculty of Chemistry, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Sulamith Frerich
- Ruhr-University Bochum, Institute of Thermo and Fluid Dynamics, Universitätsstraβe 150, 44801 Bochum, Germany
| | - Jasna Ivanovic
- University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11000 Belgrade, Serbia.
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12
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Foaming of polymers with supercritical fluids and perspectives on the current knowledge gaps and challenges. J Supercrit Fluids 2018. [DOI: 10.1016/j.supflu.2017.11.013] [Citation(s) in RCA: 129] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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13
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Novendra N, Hasirci N, Dilek C. Supercritical processing of CO 2 -philic polyhedral oligomeric silsesquioxane (POSS)-poly( l -lactic acid) composites. J Supercrit Fluids 2016. [DOI: 10.1016/j.supflu.2016.06.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Mezzomo N, Oliveira DA, Comim SRR, Ferreira SRS. ENCAPSULATION OF EXTRACT FROM WINERY INDUSTRY RESIDUE USING THE SUPERCRITICAL ANTI-SOLVENT TECHNIQUE. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2016. [DOI: 10.1590/0104-6632.20160333s20150051] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- N. Mezzomo
- Universidade Federal de Santa Catarina, Brazil; Catarinense Federal Institute, Brazil
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Jennings J, Bassett SP, Hermida-Merino D, Portale G, Bras W, Knight L, Titman JJ, Higuchi T, Jinnai H, Howdle SM. How does dense phase CO2 influence the phase behaviour of block copolymers synthesised by dispersion polymerisation? Polym Chem 2016. [DOI: 10.1039/c5py01823d] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Using a CO2 continuous phase for dispersion synthesis of block copolymers can provide a useful handle to control phase behaviour.
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Affiliation(s)
- J. Jennings
- School of Chemistry
- University of Nottingham
- Nottingham
- UK
| | - S. P. Bassett
- School of Chemistry
- University of Nottingham
- Nottingham
- UK
| | - D. Hermida-Merino
- DUBBLE@ESRF
- Netherlands Organisation for Scientific Research (N.W.O.)
- Grenoble
- France
| | - G. Portale
- DUBBLE@ESRF
- Netherlands Organisation for Scientific Research (N.W.O.)
- Grenoble
- France
| | - W. Bras
- DUBBLE@ESRF
- Netherlands Organisation for Scientific Research (N.W.O.)
- Grenoble
- France
| | - L. Knight
- School of Chemistry
- University of Nottingham
- Nottingham
- UK
| | - J. J. Titman
- School of Chemistry
- University of Nottingham
- Nottingham
- UK
| | - T. Higuchi
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM)
- Tohoku University
- Sendai 980-8577
- Japan
| | - H. Jinnai
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM)
- Tohoku University
- Sendai 980-8577
- Japan
| | - S. M. Howdle
- School of Chemistry
- University of Nottingham
- Nottingham
- UK
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16
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Curia S, Barclay AF, Torron S, Johansson M, Howdle SM. Green process for green materials: viable low-temperature lipase-catalysed synthesis of renewable telechelics in supercritical CO2. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2015; 373:rsta.2015.0073. [PMID: 26574529 DOI: 10.1098/rsta.2015.0073] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/29/2015] [Indexed: 06/05/2023]
Abstract
We present a novel near-ambient-temperature approach to telechelic renewable polyesters by exploiting the unique properties of supercritical CO(2) (scCO(2)). Bio-based commercially available monomers have been polymerized and functional telechelic materials with targeted molecular weight prepared by end-capping the chains with molecules containing reactive moieties in a one-pot reaction. The use of scCO(2) as a reaction medium facilitates the effective use of Candida antarctica Lipase B (CaLB) as a catalyst at a temperature as low as 35°C, hence avoiding side reactions, maintaining the end-capper functionality and preserving the enzyme activity. The functionalized polymer products have been characterized by (1)H nuclear magnetic resonance spectroscopy, matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry, gel permeation chromatography and differential scanning calorimetry in order to carefully assess their structural and thermal properties. We demonstrate that telechelic materials can be produced enzymatically at mild temperatures, in a solvent-free system and using renewably sourced monomers without pre-modification, by exploiting the unique properties of scCO(2). The macromolecules we prepare are ideal green precursors that can be further reacted to prepare useful bio-derived films and coatings.
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Affiliation(s)
- S Curia
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, UK
| | - A F Barclay
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, UK
| | - S Torron
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden
| | - M Johansson
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden
| | - S M Howdle
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, UK
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17
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Curia S, De Focatiis D, Howdle S. High-pressure rheological analysis of CO2-induced melting point depression and viscosity reduction of poly(ε-caprolactone). POLYMER 2015. [DOI: 10.1016/j.polymer.2015.05.026] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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18
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Knani D, Alperstein D, Kauth T, Kaltbeitzel D, Hopmann C. Molecular modeling study of CO2 plasticization and sorption onto absorbable polyesters. Polym Bull (Berl) 2015. [DOI: 10.1007/s00289-015-1349-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Tsui A, Wright Z, Frank CW. Prediction of gas solubility in poly(3-hydroxybutyrate- co
-3-hydroxyvalerate) melt to inform process design and resulting foam microstructure. POLYM ENG SCI 2014. [DOI: 10.1002/pen.23822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Amy Tsui
- Department of Chemical Engineering; Stanford University; Stanford California 94305
| | - Zach Wright
- Department of Chemical Engineering; Stanford University; Stanford California 94305
| | - Curtis W. Frank
- Department of Chemical Engineering; Stanford University; Stanford California 94305
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22
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Schmidt C, Behl M, Lendlein A, Beuermann S. Synthesis of high molecular weight polyglycolide in supercritical carbon dioxide. RSC Adv 2014. [DOI: 10.1039/c4ra06815g] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Yoon Y, Plummer CJG, Thoemen H, Månson JAE. Liquid CO2 processing of solid polylactide foam precursors. J CELL PLAST 2014. [DOI: 10.1177/0021955x14537662] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Diffusion of CO2 in polylactide was modelled by assuming the diffusion coefficient to depend on CO2 concentration, c, according to D[ c] = D[0]exp[ Ac], where D[0] and A are empirical constants, with the aim of optimizing impregnation of nominally amorphous and semicrystalline polylactide/CO2-based precursors for physical foaming. Numerical simulations provided a consistent description of desorption at different temperatures, T, from polylactide impregnated with liquid CO2 at 10℃ and 5 MPa, and D[0, T] could be represented analytically using Arrhenius or Williams–Landel–Ferry-type expressions, allowing interpolation and extrapolation. Sorption was argued on this basis to involve a step-like diffusion front, such that the CO2 content of a plate of thickness l increased as ( D[0] t)1/2 l−1 F[ Aco], where co is the value of c at saturation and F is a function of Aco only. A major practical concern with polylactide/CO2 precursors is that the glass transition temperature, Tg, decreases strongly with c, so that amorphous polylactide saturated with CO2 at 10℃ and 5 MPa degasses spontaneously at room temperature and pressure. However, it was inferred from the models and confirmed experimentally that partial impregnation in liquid CO2 for relatively short times could provide a relatively rapid means of preparing precursors with a roughly uniform CO2 content of around 0.1 g/g that were stable with respect to rapid CO2 loss on heating to room temperature. The resulting precursors gave satisfactory foam morphologies and densities on foaming at 100℃. Moreover, it was also possible to adapt the impregnation conditions so as to obtain partially foamed structures from semicrystalline polylactide under these conditions, in spite of its tendency to undergo cold crystallization during impregnation in liquid CO2, which suppressed expansion of saturated specimens at 100℃.
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Affiliation(s)
- Yonghoon Yoon
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Christopher JG Plummer
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Heiko Thoemen
- Architecture, Wood and Civil Engineering, Bern University of Applied Sciences, Switzerland
| | - Jan-Anders E Månson
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
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Salerno A, Clerici U, Domingo C. Solid-state foaming of biodegradable polyesters by means of supercritical CO2/ethyl lactate mixtures: Towards designing advanced materials by means of sustainable processes. Eur Polym J 2014. [DOI: 10.1016/j.eurpolymj.2013.11.015] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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25
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Salerno A, Domingo C. Low-temperature clean preparation of poly(lactic acid) foams by combining ethyl lactate and supercritical CO2
: correlation between processing and foam pore structure. POLYM INT 2014. [DOI: 10.1002/pi.4677] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Aurelio Salerno
- Institute of Materials Science of Barcelona (ICMAB-CSIC); Campus de la UAB s/n Bellaterra 08193 Spain
| | - Concepción Domingo
- Institute of Materials Science of Barcelona (ICMAB-CSIC); Campus de la UAB s/n Bellaterra 08193 Spain
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Salerno A, Domingo C. Effect of blowing agent composition and processing parameters on the low temperature foaming of poly(l-lactide/caprolactone) co-polymer by means of supercritical CO2/ethyl lactate binary mixtures. J Supercrit Fluids 2013. [DOI: 10.1016/j.supflu.2013.10.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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27
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YU J, TANG C, GUAN Y, YAO S, ZHU Z. Sorption and Diffusion Behavior of Carbon Dioxide into Poly(l-lactic acid) Films at Elevated Pressures. Chin J Chem Eng 2013. [DOI: 10.1016/s1004-9541(13)60623-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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28
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Cabezas L, Gracia I, García M, de Lucas A, Rodríguez J. Production of biodegradable porous scaffolds impregnated with 5-fluorouracil in supercritical CO2. J Supercrit Fluids 2013. [DOI: 10.1016/j.supflu.2013.03.030] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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29
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Della Porta G, Falco N, Giordano E, Reverchon E. PLGA microspheres by Supercritical Emulsion Extraction: a study on insulin release in myoblast culture. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2013; 24:1831-47. [PMID: 23786568 DOI: 10.1080/09205063.2013.807457] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Supercritical Emulsion Extraction in a Continuous operation layout is proposed for the production of poly-lactic-co-glycolic acid (PLGA) microspheres loaded with insulin, selected as a model of bioactive signal. Microspheres with different mean sizes of 2 μm (±0.9 μm) and 3 μm (±2.2 μm) and insulin loadings of 3 and 6 mg/g were obtained by processing different water-oil-water emulsions; an encapsulation efficiency of about 60% w/w was measured in all cases. Insulin release profiles from PLGA microspheres were also characterized in two different media (Phosphate-Buffered Saline and Dulbecco's Modified Eagle Medium) and kinetic constants were estimated by using a model proposed in literature. The produced microspheres were, then, used for the cultivation of rat embryonic ventricular myoblasts in a serum-free medium to monitor the biological effect of the released insulin. The best cell viability and proliferation, supported by released insulin, was monitored when microspheres with mean size of 3 μm loaded with 3 mg/g of insulin were added.
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Affiliation(s)
- Giovanna Della Porta
- a Dipartimento di Ingegneria Industriale , Università di Salerno , via Ponte don Melillo 1 , 84084 , Fisciano , SA , Italy
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Bhamidipati M, Scurto AM, Detamore MS. The future of carbon dioxide for polymer processing in tissue engineering. TISSUE ENGINEERING PART B-REVIEWS 2013; 19:221-32. [PMID: 23289736 DOI: 10.1089/ten.teb.2012.0361] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The use of CO2 for scaffold fabrication in tissue engineering was popularized in the mid-1990 s as a tool for producing polymeric foam scaffolds, but had fallen out of favor to some extent, in part due to challenges with pore interconnectivity. Pore interconnectivity issues have since been resolved by numerous dedicated studies that have collectively outlined how to control the appropriate parameters to achieve a pore structure desirable for tissue regeneration. In addition to CO2 foaming, several groups have leveraged CO2 as a swelling agent to impregnate scaffolds with drugs and other bioactive additives, and for encapsulation of plasmids within scaffolds for gene delivery. Moreover, in contrast to CO2 foaming, which typically relies on supercritical CO2 at very high pressures, CO2 at much lower pressures has also been used to sinter polymeric microspheres together in the presence of cells to create cell-seeded scaffolds in a single step. CO2 has a number of advantages for polymer processing in tissue engineering, including its ease of use, low cost, and the opportunity to circumvent the use of organic solvents. Building on these advantages, and especially now with the tremendous precedent that has paved the way in defining operating parameters, and making the technology accessible for new groups to adapt, we invite and encourage our colleagues in the field to leverage CO2 as a new tool to enhance their own respective unique capabilities.
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Affiliation(s)
- Manjari Bhamidipati
- Bioengineering Graduate Program, University of Kansas, Lawrence, Kansas 66045-7618, USA
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Abstract
Nanofibers have a wide range of applications, including filtration and biomedical engineering. Porous or hollow fibers with large surface-to-volume ratios are more popular in some fields than the common nanofibers. Porous nanofibers can be obtained through electrospinning with highly volatile solvents or through special treatment following electrospinning. A new process where electrospinning is conducted in supercritical or near-critical CO2to produce porous or hollow nanofibers has been summarized. In addition, a process entailing compressed N2-assisted electrospinning was attempted to produce PVP nanofibers in this work, but it was proved to be unsuccessful. Since the fiber morphologies are dependent on the phase behavior of organic solvents in supercritical fluids, ASPEN PLUS 2006 was used to simulate the phase equilibrium of the solvent-supercritical fluid system to explain why porous or hollow fibers can be obtained in compressed CO2, but not in compressed N2.
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Elizondo E, Veciana J, Ventosa N. Nanostructuring molecular materials as particles and vesicles for drug delivery, using compressed and supercritical fluids. Nanomedicine (Lond) 2012; 7:1391-408. [DOI: 10.2217/nnm.12.110] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The structuring of synthetic and biological therapeutic actives as micro- and nano-particulate materials is a widely accepted formulation strategy to improve efficacy and reduce the toxicity of drugs. However, the development of efficient production platforms that enable the formulation of these nanomedicines at an industrial scale and with the quality requirements imposed by regulatory agencies remains a challenge. In this framework, compressed fluid-based methods are promising technologies for the controlled and reproducible preparation of uniform micro- and nano-particulate nanomedicines at a large scale. This review provides an overall but practical knowledge about what has been achieved so far in the field of compressed fluids applied to the preparation of solid micro- and nanoparticles and vesicles as drug delivery systems. In addition, recent examples of application of these technologies to the production of polymeric nanostructured microparticles highly loaded with gentamicin and to the preparation of uniform cholesterol-rich vesicular systems are explained.
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Affiliation(s)
- Elisa Elizondo
- Departament de Nanociència Molecular i Materials Orgànics, Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193, Bellaterra, Barcelona, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 08193, Bellaterra, Barcelona, Spain
| | - Jaume Veciana
- Departament de Nanociència Molecular i Materials Orgànics, Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193, Bellaterra, Barcelona, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 08193, Bellaterra, Barcelona, Spain
| | - Nora Ventosa
- Departament de Nanociència Molecular i Materials Orgànics, Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193, Bellaterra, Barcelona, Spain
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Jin H, Li S, Hu D, Zhao Y. Preparation of PLA-PEG nanoparticles by the solution enhanced dispersion with enhanced mass transfer using ultrasound in supercritical CO2. POWDER TECHNOL 2012. [DOI: 10.1016/j.powtec.2012.04.050] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Kelly CA, Howdle SM, Shakesheff KM, Jenkins MJ, Leeke GA. Viscosity studies of poly(DL
-lactic acid) in supercritical CO2. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/polb.23130] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Lin CS, Xu JJ, Ng KM, Wibowo C, Luo KQ. Encapsulation of a Low Aqueous Solubility Substance in a Biodegradable Polymer using Supercritical Fluid Extraction of Emulsion. Ind Eng Chem Res 2012. [DOI: 10.1021/ie300612r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Cabezas L, Fernández V, Mazarro R, Gracia I, de Lucas A, Rodríguez J. Production of biodegradable porous scaffolds impregnated with indomethacin in supercritical CO2. J Supercrit Fluids 2012. [DOI: 10.1016/j.supflu.2011.12.002] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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37
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Phase behaviour and miscibility window in UCST-type blends of poly(styrene-co-acrylonitrile) and tetramethylbisphenol A oligosulfones. Eur Polym J 2012. [DOI: 10.1016/j.eurpolymj.2011.11.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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38
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Porta GD, Campardelli R, Falco N, Reverchon E. PLGA microdevices for retinoids sustained release produced by supercritical emulsion extraction: Continuous versus batch operation layouts. J Pharm Sci 2011; 100:4357-67. [DOI: 10.1002/jps.22647] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2011] [Revised: 05/02/2011] [Accepted: 05/11/2011] [Indexed: 11/11/2022]
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39
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Intranuovo F, Howard D, White LJ, Johal RK, Ghaemmaghami AM, Favia P, Howdle SM, Shakesheff KM, Alexander MR. Uniform cell colonization of porous 3-D scaffolds achieved using radial control of surface chemistry. Acta Biomater 2011; 7:3336-44. [PMID: 21642021 DOI: 10.1016/j.actbio.2011.05.020] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2011] [Revised: 05/11/2011] [Accepted: 05/18/2011] [Indexed: 10/18/2022]
Abstract
Uniform cellular distribution is a prerequisite to forming tissue within porous scaffolds, but the seeding process often results in preferential adhesion of cells at the periphery. We develop a vapour phase coating strategy which is readily applicable to any porous solid to provide a uniform cellular distribution. Plasma polymerized allyl amine (ppAAm) is used to form a thin nitrogen-containing coating throughout porous three-dimensional (3-D) poly(d,l-lactic acid) scaffolds. Subsequent controlled deposition of a hydrocarbon plasma polymerized hexane (ppHex) allows control of the fibroblast penetration into these porous 3-D objects. In order to optimize the coating conditions, a planar pinhole model of plasma penetration into pores is developed to rapidly measure deposit penetration using picolitre water contact angle measurement. Sufficiently good control over the plasma deposition within the porous scaffold is achieved using this approach to superimpose a relatively cell-repellent ppHex coating at the scaffold periphery onto the ppAAm-coated core, with a chemical gradient between the two. This 3-D chemical gradient encourages 3T3 fibroblast cells to adhere homogeneously from the periphery to the centre, when balanced by the tortuousity of the pore structure, which cells experience when passing from the surrounding medium to the centre.
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Fabrication of porous chitosan scaffolds for soft tissue engineering using dense gas CO2. Acta Biomater 2011; 7:1653-64. [PMID: 21130905 DOI: 10.1016/j.actbio.2010.11.043] [Citation(s) in RCA: 132] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2010] [Revised: 11/25/2010] [Accepted: 11/30/2010] [Indexed: 12/22/2022]
Abstract
The aim of this study was to investigate the feasibility of fabricating porous crosslinked chitosan hydrogels in an aqueous phase using dense gas CO(2) as a foaming agent. Highly porous chitosan hydrogels were formed by using glutaraldehyde and genipin as crosslinkers. The method developed here eliminates the formation of a skin layer, and does not require the use of surfactants or other toxic reagents to generate porosity. The chitosan hydrogel scaffolds had an average pore diameter of 30-40 μm. The operating pressure had a negligible effect on the pore characteristics of chitosan hydrogels. Temperature, reaction period, type of biopolymer and crosslinker had a significant impact on the pore size and characteristics of the hydrogel produced by dense gas CO(2). Scanning electron microscopy and histological analysis confirmed that the resulting porous structures allowed fibroblasts seeded on these scaffolds to proliferate into the three-dimensional (3-D) structure of these chitosan hydrogels. Live/dead staining and MTS analysis demonstrated that fibroblast cells proliferated over 7 days. The fabricated hydrogels exhibited comparable mechanical strength and swelling ratio and are potentially useful for soft tissue engineering applications such as skin and cartilage regeneration.
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Yoda S, Sato K, Oyama HT. Impregnation of paclitaxel into poly(dl-lactic acid) using high pressure mixture of ethanol and carbon dioxide. RSC Adv 2011. [DOI: 10.1039/c1ra00070e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Porta GD, Falco N, Reverchon E. Continuous supercritical emulsions extraction: A new technology for biopolymer microparticles production. Biotechnol Bioeng 2010; 108:676-86. [DOI: 10.1002/bit.22972] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Revised: 09/28/2010] [Accepted: 10/01/2010] [Indexed: 11/06/2022]
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43
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Kluge J, Mazzotti M, Muhrer G. Solubility of Ketoprofen in colloidal PLGA. Int J Pharm 2010; 399:163-72. [DOI: 10.1016/j.ijpharm.2010.08.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2010] [Revised: 08/11/2010] [Accepted: 08/13/2010] [Indexed: 10/19/2022]
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44
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Kiran E. Foaming strategies for bioabsorbable polymers in supercritical fluid mixtures. Part II. Foaming of poly(ɛ-caprolactone-co-lactide) in carbon dioxide and carbon dioxide+acetone fluid mixtures and formation of tubular foams via solution extrusion. J Supercrit Fluids 2010. [DOI: 10.1016/j.supflu.2010.05.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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45
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Kiran E. Foaming strategies for bioabsorbable polymers in supercritical fluid mixtures. Part I. Miscibility and foaming of poly(l-lactic acid) in carbon dioxide+acetone binary fluid mixtures. J Supercrit Fluids 2010. [DOI: 10.1016/j.supflu.2010.05.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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46
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Tai H, Upton CE, White LJ, Pini R, Storti G, Mazzotti M, Shakesheff KM, Howdle SM. Studies on the interactions of CO2 with biodegradable poly(dl-lactic acid) and poly(lactic acid-co-glycolic acid) copolymers using high pressure ATR-IR and high pressure rheology. POLYMER 2010. [DOI: 10.1016/j.polymer.2010.01.065] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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47
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Aionicesei E, Škerget M, Knez Ž. Mathematical modelling of the solubility of supercritical CO2 in poly(l-lactide) and poly(d,l-lactide-co-glycolide). J Supercrit Fluids 2009. [DOI: 10.1016/j.supflu.2009.06.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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48
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Production of PLGA micro- and nanocomposites by supercritical fluid extraction of emulsions: I. Encapsulation of lysozyme. J Supercrit Fluids 2009. [DOI: 10.1016/j.supflu.2009.05.010] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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49
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Measurement of CO2 solubility and diffusivity in poly(l-lactide) and poly(d,l-lactide-co-glycolide) by magnetic suspension balance. J Supercrit Fluids 2008. [DOI: 10.1016/j.supflu.2008.07.011] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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