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Iemtsev A, Zumaya ALV, Dinh M, Hassouna F, Fulem M. Towards rational design of API-poly(D, L-lactide-co-glycolide) based micro- and nanoparticles: The role of API-polymer compatibility prediction. Int J Pharm 2024; 650:123724. [PMID: 38123107 DOI: 10.1016/j.ijpharm.2023.123724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 12/14/2023] [Accepted: 12/16/2023] [Indexed: 12/23/2023]
Abstract
Due to their unique properties, such as controlled drug release and improved bioavailability, polymeric microparticles and nanoparticles (MPs and NPs) have gained considerable interest in the pharmaceutical industry. Nevertheless, the high costs associated with biodegradable polymers and the active pharmaceutical ingredients (APIs) used for treating serious diseases, coupled with the vast number of API-polymer combinations, make the search for effective API-polymer MPs and NPs a costly and time-consuming process. In this work, the correlation between the compatibility of selected model APIs (i.e., ibuprofen, naproxen, paracetamol, and indomethacin) with poly(lactide-co-glycolide) (PLGA) derived from respective binary phase diagrams and characteristics of prepared MPs and NPs, such as the drug loading and solid-state properties, was investigated to probe the possibility of implementing the modeling of API-polymer thermodynamic and kinetic phase behavior as part of rational design of drug delivery systems based on MPs and NPs. API-PLGA-based MPs and NPs were formulated using an emulsion-solvent evaporation technique and were characterized for morphology, mean size, zeta potential, drug loading, and encapsulation efficiency. The solid-state properties of the encapsulated APIs were assessed using differential scanning calorimetry and X-ray powder diffraction. The evaluated compatibility was poor for all considered API-PLGA pairs, which is in alignment with the experimental results showing low drug loading in terms of amorphous API content. At the same time, drug loading of the studied APIs in terms of amorphous content was found to follow the same trend as their solubility in PLGA, indicating a clear correlation between API solubility in PLGA and achievable drug loading. These findings suggest that API-polymer phase behavior modeling and compatibility screening can be employed as an effective preformulation tool to estimate optimum initial API concentration for MP and NP preparation or, from a broader perspective, to tune or select polymeric carriers offering desired drug loading.
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Affiliation(s)
- Anton Iemtsev
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Alma Lucia Villela Zumaya
- Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Martin Dinh
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Fatima Hassouna
- Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic.
| | - Michal Fulem
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic.
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2
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Mathers A, Pechar M, Hassouna F, Fulem M. The step-wise dissolution method: An efficient DSC-based protocol for verification of predicted API-polymer compatibility. Int J Pharm 2023; 648:123604. [PMID: 37981251 DOI: 10.1016/j.ijpharm.2023.123604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/03/2023] [Accepted: 11/11/2023] [Indexed: 11/21/2023]
Abstract
The development of an amorphous solid dispersion (ASD) is a promising strategy for improving the low bioavailability of many poorly water-soluble active pharmaceutical ingredients (APIs). The construction of a temperature-composition (T-C) phase diagram for an API-polymer combination is imperative as it can provide critical information that is essential for formulating stable ASDs. However, the currently followed differential scanning calorimetry (DSC)-based strategies for API solubility determination in a polymer at elevated temperatures are inefficient and, on occasions, unreliable, which may lead to an inaccurate prediction at lower temperatures of interest (i.e., T = 25 °C). Recently, we proposed a novel DSC-based protocol called the "step-wise dissolution" (S-WD) method, which is both cost- and time-effective. The objective of this study was to test the applicability of the S-WD method regarding expeditious verification of the purely-predicted API-polymer compatibility via the perturbed chain-statistical associating fluid theory (PC-SAFT) equation of state (EOS). Fifteen API-polymer T-C phase diagrams were reliably constructed, with three distinct API-polymer case types being identified regarding the approach used for the S-WD method. Overall, the PC-SAFT EOS provided satisfactory qualitative descriptions of the API-polymer compatibility, but not necessarily accurate quantitative predictions of the API solubility in the polymer at T = 25 °C. The S-WD method was subsequently modified and an optimal protocol was proposed, which can significantly reduce the required experimental effort.
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Affiliation(s)
- Alex Mathers
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Matouš Pechar
- Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, Technická 3, 166 28 Prague 6, Czech Republic
| | - Fatima Hassouna
- Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, Technická 3, 166 28 Prague 6, Czech Republic
| | - Michal Fulem
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic.
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3
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Lapka T, Vilčáková J, Kopecký D, Prokeš J, Dendisová M, Moučka R, Sedlačík M, Hassouna F. Flexible, ultrathin and light films from one-dimensional nanostructures of polypyrrole and cellulose nanofibers for high performance electromagnetic interference shielding. Carbohydr Polym 2023; 309:120662. [PMID: 36906374 DOI: 10.1016/j.carbpol.2023.120662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 01/25/2023] [Accepted: 02/01/2023] [Indexed: 02/10/2023]
Abstract
Combining highly conducting one-dimensional nanostructures of polypyrrole with cellulose nanofibers (CNF) into flexible films with tailored electrical conductivity and mechanical properties presents a promising route towards the development of eco-friendly electromagnetic interference shielding devices. Herein, conducting films with a thickness of 140 μm were synthesized from polypyrrole nanotubes (PPy-NT) and CNF using two approaches, i.e., a new one-pot synthesis consisting of in situ polymerization of pyrrole in the presence of structure guiding agent and CNF, and a two-step synthesis, in which CNF and PPy-NT were physically blended. Films based on one-pot synthesis (PPy-NT/CNFin) exhibited higher conductivity than those processed by physical blending, which was further enhanced up to 14.51 S cm-1 after redoping using HCl post-treatment. PPy-NT/CNFin containing the lowest PPy-NT loading (40 wt%), thus the lowest conductivity (5.1 S cm-1), displayed the highest shielding effectiveness of -23.6 dB (>90 % attenuation), thanks to the good balance between its mechanical properties and electrical conductivity.
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Affiliation(s)
- Tomáš Lapka
- Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, 166 28 Prague 6, Czech Republic
| | - Jarmila Vilčáková
- Centre of Polymer Systems, Tomas Bata University in Zlín, 760 01 Zlín, Czech Republic
| | - Dušan Kopecký
- Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, 166 28 Prague 6, Czech Republic
| | - Jan Prokeš
- Faculty of Mathematics and Physics, Charles University, 180 00 Prague 8, Czech Republic
| | - Marcela Dendisová
- Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, 166 28 Prague 6, Czech Republic
| | - Robert Moučka
- Centre of Polymer Systems, Tomas Bata University in Zlín, 760 01 Zlín, Czech Republic
| | - Michal Sedlačík
- Centre of Polymer Systems, Tomas Bata University in Zlín, 760 01 Zlín, Czech Republic
| | - Fatima Hassouna
- Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, 166 28 Prague 6, Czech Republic.
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Zemánková A, Hassouna F, Klajmon M, Fulem M. Solid–Liquid Equilibrium in Co-Amorphous Systems: Experiment and Prediction. Molecules 2023; 28:molecules28062492. [PMID: 36985463 PMCID: PMC10052153 DOI: 10.3390/molecules28062492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 03/06/2023] [Accepted: 03/07/2023] [Indexed: 03/11/2023] Open
Abstract
In this work, the solid–liquid equilibrium (SLE) of four binary systems combining two active pharmaceutical ingredients (APIs) capable of forming co-amorphous systems (CAMs) was investigated. The binary systems studied were naproxen-indomethacin, naproxen-ibuprofen, naproxen-probucol, and indomethacin-paracetamol. The SLE was experimentally determined by differential scanning calorimetry. The thermograms obtained revealed that all binary mixtures investigated form eutectic systems. Melting of the initial binary crystalline mixtures and subsequent quenching lead to the formation of CAM for all binary systems and most of the compositions studied. The experimentally obtained liquidus and eutectic temperatures were compared to theoretical predictions using the perturbed-chain statistical associating fluid theory (PC-SAFT) equation of state and conductor-like screening model for real solvents (COSMO-RS), as implemented in the Amsterdam Modeling Suite (COSMO-RS-AMS). On the basis of the obtained results, the ability of these models to predict the phase diagrams for the investigated API–API binary systems was evaluated. Furthermore, the glass transition temperature (Tg) of naproxen (NAP), a compound with a high tendency to recrystallize, whose literature values are considerably scattered, was newly determined by measuring and modeling the Tg values of binary mixtures in which amorphous NAP was stabilized. Based on this analysis, erroneous literature values were identified.
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Affiliation(s)
- Alžběta Zemánková
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague, Czech Republic; (A.Z.); (M.K.)
| | - Fatima Hassouna
- Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague, Czech Republic
| | - Martin Klajmon
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague, Czech Republic; (A.Z.); (M.K.)
| | - Michal Fulem
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague, Czech Republic; (A.Z.); (M.K.)
- Correspondence:
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Soukupová G, Bautkinová T, Mazúr P, Vilčáková J, Prokeš J, Dendisová M, Lhotka M, Hassouna F. Enhanced specific capacity and cycling stability of flexible nanocellulose-based pseudocapacitive electrodes by controlled nanostructuring of polyaniline. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.141830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Iemtsev A, Hassouna F, Klajmon M, Mathers A, Fulem M. Compatibility of selected active pharmaceutical ingredients with poly(D, L-lactide-co-glycolide): Computational and experimental study. Eur J Pharm Biopharm 2022. [DOI: 10.1016/j.ejpb.2022.09.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Mathers A, Pechar M, Hassouna F, Fulem M. API solubility in semi-crystalline polymer: Kinetic and thermodynamic phase behavior of PVA-based solid dispersions. Int J Pharm 2022; 623:121855. [PMID: 35623485 DOI: 10.1016/j.ijpharm.2022.121855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 05/18/2022] [Accepted: 05/20/2022] [Indexed: 11/18/2022]
Abstract
The formulation of amorphous solid dispersions (ASDs) represents a promising strategy for improving the poor bioavailability of many active pharmaceutical ingredients (APIs). The objective of this study was to investigate and compare the long-term physical stability (LTPS) of polyvinyl alcohol (PVA)-based solid dispersions formulated via hot-melt extrusion (HME) with their respective API-PVA temperature-composition (T-C) phase diagram. Furthermore, the impact of API glass-forming ability (GFA) on the LTPS was evaluated through the selection of two APIs with contrasting GFA (i.e., indomethacin (IND; good GFA) and naproxen (NAP; poor GFA)). Even though the predicted solubility of both APIs in PVA was less than 1 wt% at T = 25 °C, IND remained fully amorphous in HME-formulated IND-PVA extrudates with initial API loadings of 50, 40, and 30 wt% after a 24-month storage period. Meanwhile, NAP recrystallized to a considerable degree in each analogous sample with an amorphous NAP content of 22.5-23.5 wt% remaining after a 12-month storage period. While the constructed T-C phase diagrams were still in agreement with their respective LTPS study, they did not account for the impact of water uptake as well as potential HME-induced effects on the extrudate glass-transition temperature. This work may serve as a useful reference point for researchers who are interested in determining the solubility of an API in a semi-crystalline polymer and the challenges therein.
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Affiliation(s)
- Alex Mathers
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Matouš Pechar
- Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, Technická 3, 166 28 Prague 6, Czech Republic
| | - Fatima Hassouna
- Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, Technická 3, 166 28 Prague 6, Czech Republic.
| | - Michal Fulem
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic.
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Villela Zumaya AL, Mincheva R, Raquez JM, Hassouna F. Nanocluster-Based Drug Delivery and Theranostic Systems: Towards Cancer Therapy. Polymers (Basel) 2022; 14:polym14061188. [PMID: 35335518 PMCID: PMC8955999 DOI: 10.3390/polym14061188] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/14/2022] [Accepted: 03/15/2022] [Indexed: 12/12/2022] Open
Abstract
Over the last decades, the global life expectancy of the population has increased, and so, consequently, has the risk of cancer development. Despite the improvement in cancer therapies (e.g., drug delivery systems (DDS) and theranostics), in many cases recurrence continues to be a challenging issue. In this matter, the development of nanotechnology has led to an array of possibilities for cancer treatment. One of the most promising therapies focuses on the assembly of hierarchical structures in the form of nanoclusters, as this approach involves preparing individual building blocks while avoiding handling toxic chemicals in the presence of biomolecules. This review aims at presenting an overview of the major advances made in developing nanoclusters based on polymeric nanoparticles (PNPs) and/or inorganic NPs. The preparation methods and the features of the NPs used in the construction of the nanoclusters were described. Afterwards, the design, fabrication and properties of the two main classes of nanoclusters, namely noble-metal nanoclusters and hybrid (i.e., hetero) nanoclusters and their mode of action in cancer therapy, were summarized.
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Affiliation(s)
- Alma Lucia Villela Zumaya
- Faculty of Chemical Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic;
| | - Rosica Mincheva
- Laboratory of Polymeric and Composite Materials, University of Mons (UMONS), Place du Parc 20, 7000 Mons, Belgium; (R.M.); (J.-M.R.)
| | - Jean-Marie Raquez
- Laboratory of Polymeric and Composite Materials, University of Mons (UMONS), Place du Parc 20, 7000 Mons, Belgium; (R.M.); (J.-M.R.)
| | - Fatima Hassouna
- Faculty of Chemical Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic;
- Correspondence: ; Tel.: +420-220-444-099
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Trunov D, Muzika F, Kříž A, Štětina J, Sedlářová I, Dendisová M, Hassouna F, Šoóš M. Ambient-temperature porogen-free method for preparation of silica-based macroporous materials. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.128033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Zumaya ALV, Rimpelová S, Štějdířová M, Ulbrich P, Vilčáková J, Hassouna F. Antibody Conjugated PLGA Nanocarriers and Superparmagnetic Nanoparticles for Targeted Delivery of Oxaliplatin to Cells from Colorectal Carcinoma. Int J Mol Sci 2022; 23:ijms23031200. [PMID: 35163122 PMCID: PMC8835878 DOI: 10.3390/ijms23031200] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 01/14/2022] [Accepted: 01/19/2022] [Indexed: 02/04/2023] Open
Abstract
Anti-CD133 monoclonal antibody (Ab)-conjugated poly(lactide-co-glycolide) (PLGA) nanocarriers, for the targeted delivery of oxaliplatin (OXA) and superparamagnetic nanoparticles (IO-OA) to colorectal cancer cells (CaCo-2), were designed, synthesized, characterized, and evaluated in this study. The co-encapsulation of OXA and IO-OA was achieved in two types of polymeric carriers, namely, PLGA and poly(lactide-co-glycolide)-poly(ethylene glycol) (PLGA-PEG) by double emulsion. PLGA_IO-OA_OXA and PEGylated PLGA_IO-OA_OXA nanoparticles displayed a comparable mean diameter of 207 ± 70 nm and 185 ± 119 nm, respectively. The concentration of the released OXA from the PEGylated PLGA_IO-OA_OXA increased very rapidly, reaching ~100% release after only 2 h, while the PLGA_IO-OA_OXA displayed a slower and sustained drug release. Therefore, for a controlled OXA release, non-PEGylated PLGA nanoparticles were more convenient. Interestingly, preservation of the superparamagnetic behavior of the IO-OA, without magnetic hysteresis all along the dissolution process, was observed. The non-PEGylated nanoparticles (PLGA_OXA, PLGA_IO-OA_OXA) were selected for the anti-CD133 Ab conjugation. The affinity of Ab-coated nanoparticles for CD133-positive cells was examined using fluorescence microscopy in CaCo-2 cells, which was followed by a viability assay.
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Affiliation(s)
- Alma Lucia Villela Zumaya
- Faculty of Chemical Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic; (A.L.V.Z.); (M.Š.)
| | - Silvie Rimpelová
- Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic; (S.R.); (P.U.)
| | - Markéta Štějdířová
- Faculty of Chemical Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic; (A.L.V.Z.); (M.Š.)
| | - Pavel Ulbrich
- Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic; (S.R.); (P.U.)
| | - Jarmila Vilčáková
- Faculty of Technology, Tomas Bata University, 760 01 Zlín, Czech Republic;
| | - Fatima Hassouna
- Faculty of Chemical Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic; (A.L.V.Z.); (M.Š.)
- Correspondence: ; Tel.: +420-220-444-099
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Zumaya ALV, Ulbrich P, Vilčáková J, Dendisová M, Fulem M, Šoóš M, Hassouna F. Comparison between two multicomponent drug delivery systems based on PEGylated-poly (l-lactide-co-glycolide) and superparamagnetic nanoparticles: Nanoparticulate versus nanocluster systems. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Wilson JF, Zahradník B, Šrom O, Jaquet B, Hassouna F, Hrdlička Z, Kosek J, Šoóš M. Study of the Shear-Thinning Effect between Polymer Nanoparticle Surfaces during Shear-Induced Aggregation. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c00232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- José Francisco Wilson
- Department of Chemical Engineering, University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic
| | - Boleslav Zahradník
- Department of Chemical Engineering, University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic
| | - Ondřej Šrom
- Department of Chemical Engineering, University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic
| | - Baptiste Jaquet
- Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1-5/10, 8093 Zurich, Switzerland
| | - Fatima Hassouna
- Department of Computing and Control Engineering, University of Chemistry and Technology Prague, Technicka 3, 166 28 Prague 6, Czech Republic
| | - Zdeněk Hrdlička
- Department of Polymers, University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic
| | - Juraj Kosek
- Department of Chemical Engineering, University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic
| | - Miroslav Šoóš
- Department of Chemical Engineering, University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic
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Abstract
Knowledge of the active pharmaceutical ingredient (API) solubility in a polymer is imperative for successful amorphous solid dispersion design and formulation but acquiring this information at storage temperature is challenging. Various solubility determination methods have been established, which utilize differential scanning calorimetry (DSC). In this work, three commonly used DSC-based protocols [i.e., melting point depression (MPD), recrystallization, and zero-enthalpy extrapolation (Z-EE)] and a method that we have developed called "step-wise dissolution" (S-WD) were analyzed. For temperature-composition phase diagram construction, two glass-transition temperature equations (i.e., those of Gordon-Taylor and Kwei) and three solid-liquid equilibrium curve modeling approaches [i.e., the Flory-Huggins model, an empirical equation, and the perturbed-chain statistical associating fluid theory (PC-SAFT) equation of state (EOS)] were considered. Indomethacin (IND) and Kollidon 12 PF (PVP K12) were selected as the API and polymer, respectively. An annealing time investigation revealed that the IND-PVP K12 dissolution process was remarkably faster than demixing, which contradicted previously published statements. Thus, the recrystallization method overestimated the solubility of IND in PVP K12 when a 2-h time of annealing was set as the benchmark. Likewise, the MPD and Z-EE methods overestimated the API solubility because of unreliable IND melting endotherm evaluation at lower API loadings and a relatively slow heating rate, respectively. When the experimental results obtained using the S-WD method (in conjunction with the Kwei equation) were applied to the PC-SAFT EOS, which was regarded as the most reliable combination, the predicted IND solubility in PVP K12 at T = 25 °C was approximately 40 wt %. When applicable, the S-WD method offers the advantage of using a limited number of DSC sample pans and API-polymer physical mixture compositions, which is both cost- and time-effective.
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Affiliation(s)
- Alex Mathers
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Fatima Hassouna
- Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, Technická 3, 166 28 Prague 6, Czech Republic
| | - Martin Klajmon
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Michal Fulem
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic
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Moučka R, Sedlačík M, Kasparyan H, Prokeš J, Trchová M, Hassouna F, Kopecký D. One-Dimensional Nanostructures of Polypyrrole for Shielding of Electromagnetic Interference in the Microwave Region. Int J Mol Sci 2020; 21:E8814. [PMID: 33233379 PMCID: PMC7700242 DOI: 10.3390/ijms21228814] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/18/2020] [Accepted: 11/19/2020] [Indexed: 01/22/2023] Open
Abstract
Polypyrrole one-dimensional nanostructures (nanotubes, nanobelts and nanofibers) were prepared using three various dyes (Methyl Orange, Methylene Blue and Eriochrome Black T). Their high electrical conductivity (from 17.1 to 60.9 S cm-1), good thermal stability (in the range from 25 to 150 °C) and resistivity against ageing (half-time of electrical conductivity around 80 days and better) were used in preparation of lightweight and flexible composites with silicone for electromagnetic interference shielding in the C-band region (5.85-8.2 GHz). The nanostructures' morphology and chemical structure were characterized by scanning electron microscopy, Brunauer-Emmett-Teller specific surface measurement and attenuated total reflection Fourier-transform infrared spectroscopy. DC electrical conductivity was measured using the Van der Pauw method. Complex permittivity and AC electrical conductivity of respective silicone composites were calculated from the measured scattering parameters. The relationships between structure, electrical properties and shielding efficiency were studied. It was found that 2 mm-thick silicone composites of polypyrrole nanotubes and nanobelts shield almost 80% of incident radiation in the C-band at very low loading of conductive filler in the silicone (5% w/w). Resulting lightweight and flexible polypyrrole composites exhibit promising properties for shielding of electromagnetic interference in sensitive biological and electronic systems.
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Affiliation(s)
- Robert Moučka
- Centre of Polymer Systems, Tomas Bata University in Zlín, 760 01 Zlín, Czech Republic;
| | - Michal Sedlačík
- Centre of Polymer Systems, Tomas Bata University in Zlín, 760 01 Zlín, Czech Republic;
- Department of Production Engineering, Faculty of Technology, Tomas Bata University in Zlín, Vavrečkova 275, 760 01 Zlín, Czech Republic
| | - Hayk Kasparyan
- Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, 166 28 Prague 6, Czech Republic; (H.K.); (F.H.)
| | - Jan Prokeš
- Faculty of Mathematics and Physics, Charles University, 180 00 Prague 8, Czech Republic;
| | - Miroslava Trchová
- Central Laboratory, University of Chemistry and Technology, Prague, 166 28 Prague 6, Czech Republic;
| | - Fatima Hassouna
- Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, 166 28 Prague 6, Czech Republic; (H.K.); (F.H.)
| | - Dušan Kopecký
- Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, 166 28 Prague 6, Czech Republic; (H.K.); (F.H.)
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Iemtsev A, Hassouna F, Mathers A, Klajmon M, Dendisová M, Malinová L, Školáková T, Fulem M. Physical stability of hydroxypropyl methylcellulose-based amorphous solid dispersions: Experimental and computational study. Int J Pharm 2020; 589:119845. [DOI: 10.1016/j.ijpharm.2020.119845] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 08/26/2020] [Accepted: 08/31/2020] [Indexed: 01/26/2023]
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Wilson JF, Trunov D, Šrom O, Štětina J, Hassouna F, Kosek J, Šoóš M. Temperature modulated polymer nanoparticle bonding: A numerical and experimental study. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Zumaya ALV, Martynek D, Bautkinová T, Šoóš M, Ulbrich P, Raquez JM, Dendisová M, Merna J, Vilčáková J, Kopecký D, Hassouna F. Self-assembly of poly(L-lactide-co-glycolide) and magnetic nanoparticles into nanoclusters for controlled drug delivery. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.109795] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Bautkinová T, Sifton A, Kutorglo EM, Dendisová M, Kopecký D, Ulbrich P, Mazúr P, Laachachi A, Hassouna F. New approach for the development of reduced graphene oxide/polyaniline nanocomposites via sacrificial surfactant-stabilized reduced graphene oxide. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124415] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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19
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Hassouna F, Abo El Dahab M, Fulem M, De Lima Haiek A, Laachachi A, Kopecký D, Šoóš M. Multi-scale analysis of amorphous solid dispersions prepared by freeze drying of ibuprofen loaded acrylic polymer nanoparticles. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.101182] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Kutorglo EM, Hassouna F, Kopecký D, Fišer L, Sedlářová I, Zadražil A, Šoóš M. Synthesis of conductive macroporous composite polymeric materials using porogen-free method. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.10.082] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Hassouna F, Korbelářová J, Jaquet B, Kutorglo EM, Kopecký D, Ulbrich P, Fulem M, Hrdlička Z, Šoóš M. An environmentally benign methodology to elaborating polymer nanocomposites with tunable properties using core-shell nanoparticles and cellulose nanocrystals. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.05.054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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22
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Mihai I, Hassouna F, Fouquet T, Laachachi A, Raquez JM, Ibn El Ahrach H, Dubois P. Reactive plasticization of poly(lactide) with epoxy functionalized cardanol. POLYM ENG SCI 2017. [DOI: 10.1002/pen.24647] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Iulia Mihai
- Materials Research and Technology Department; Luxembourg Institute of Science and Technology (LIST) −5, Rue Bommel, ZAE Robert Steichen; Hautcharage L-4940 Luxembourg
| | - Fatima Hassouna
- Department of Chemical Engineering; University of Chemistry and Technology (UCT) Prague; Dejvice 166 28 Czech Republic
| | - Thierry Fouquet
- Research Institute for Sustainable Chemistry; National Institute for Advanced Industrial Science and Technology (AIST); Tsukuba 305-8565 Japan
| | - Abdelghani Laachachi
- Materials Research and Technology Department; Luxembourg Institute of Science and Technology (LIST) −5, Rue Bommel, ZAE Robert Steichen; Hautcharage L-4940 Luxembourg
| | - Jean-Marie Raquez
- Laboratory of Polymeric and Composite Materials; Center of Innovation and Research in Materials and Polymers, CIRMAP, University of Mons; B-7000 Belgium
| | - Hicham Ibn El Ahrach
- Materials Research and Technology Department; Luxembourg Institute of Science and Technology (LIST) −5, Rue Bommel, ZAE Robert Steichen; Hautcharage L-4940 Luxembourg
| | - Philippe Dubois
- Laboratory of Polymeric and Composite Materials; Center of Innovation and Research in Materials and Polymers, CIRMAP, University of Mons; B-7000 Belgium
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Brüster B, Addiego F, Hassouna F, Ruch D, Raquez JM, Dubois P. Thermo-mechanical degradation of plasticized poly(lactide) after multiple reprocessing to simulate recycling: Multi-scale analysis and underlying mechanisms. Polym Degrad Stab 2016. [DOI: 10.1016/j.polymdegradstab.2016.07.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Wang K, Brüster B, Addiego F, Kfoury G, Hassouna F, Ruch D, Raquez JM, Dubois P. Strain-induced deformation mechanisms of polylactide plasticized with acrylated poly(ethylene glycol) obtained by reactive extrusion. POLYM INT 2015. [DOI: 10.1002/pi.4927] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kui Wang
- Department of Materials Research and Technology (MRT); Luxembourg Institute of Science and Technology (LIST); ZAE Robert Steichen, 5 Rue Bommel L-4940 Hautcharage Luxembourg
| | - Berit Brüster
- Department of Materials Research and Technology (MRT); Luxembourg Institute of Science and Technology (LIST); ZAE Robert Steichen, 5 Rue Bommel L-4940 Hautcharage Luxembourg
| | - Frédéric Addiego
- Department of Materials Research and Technology (MRT); Luxembourg Institute of Science and Technology (LIST); ZAE Robert Steichen, 5 Rue Bommel L-4940 Hautcharage Luxembourg
| | - Georgio Kfoury
- Department of Materials Research and Technology (MRT); Luxembourg Institute of Science and Technology (LIST); ZAE Robert Steichen, 5 Rue Bommel L-4940 Hautcharage Luxembourg
| | - Fatima Hassouna
- Department of Materials Research and Technology (MRT); Luxembourg Institute of Science and Technology (LIST); ZAE Robert Steichen, 5 Rue Bommel L-4940 Hautcharage Luxembourg
| | - David Ruch
- Department of Materials Research and Technology (MRT); Luxembourg Institute of Science and Technology (LIST); ZAE Robert Steichen, 5 Rue Bommel L-4940 Hautcharage Luxembourg
| | - Jean-Marie Raquez
- Laboratory of Polymeric and Composite Materials; Centre d'Innovation et de Recherche en Matériaux Polymères (CIRMAP); Université de Mons, Place du Parc 20 B-7000 Mons Belgium
| | - Philippe Dubois
- Laboratory of Polymeric and Composite Materials; Centre d'Innovation et de Recherche en Matériaux Polymères (CIRMAP); Université de Mons, Place du Parc 20 B-7000 Mons Belgium
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Kfoury G, Raquez JM, Hassouna F, Leclère P, Toniazzo V, Ruch D, Dubois P. Toughening of poly(lactide) using polyethylene glycol methyl ether acrylate: Reactive versus physical blending. POLYM ENG SCI 2015. [DOI: 10.1002/pen.24085] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Georgio Kfoury
- Department of Advanced Materials and Structures (AMS); Centre de Recherche Public Henri Tudor; 4940 Hautcharage Luxembourg
- Research Institute for Materials Science and Engineering, Laboratory of Polymeric and Composite Materials (LPCM); Centre of Innovation and Research in Materials and Polymers (CIRMAP), University of Mons (UMONS); B-7000 Mons Belgium
| | - Jean-Marie Raquez
- Research Institute for Materials Science and Engineering, Laboratory of Polymeric and Composite Materials (LPCM); Centre of Innovation and Research in Materials and Polymers (CIRMAP), University of Mons (UMONS); B-7000 Mons Belgium
| | - Fatima Hassouna
- Department of Advanced Materials and Structures (AMS); Centre de Recherche Public Henri Tudor; 4940 Hautcharage Luxembourg
| | - Philippe Leclère
- Research Institute for Materials Science and Engineering, Laboratory for Chemistry and Novel Materials (LCNM); CIRMAP, University of Mons (UMONS); B-7000 Mons Belgium
| | - Valérie Toniazzo
- Department of Advanced Materials and Structures (AMS); Centre de Recherche Public Henri Tudor; 4940 Hautcharage Luxembourg
| | - David Ruch
- Department of Advanced Materials and Structures (AMS); Centre de Recherche Public Henri Tudor; 4940 Hautcharage Luxembourg
| | - Philippe Dubois
- Research Institute for Materials Science and Engineering, Laboratory of Polymeric and Composite Materials (LPCM); Centre of Innovation and Research in Materials and Polymers (CIRMAP), University of Mons (UMONS); B-7000 Mons Belgium
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Ibarra-Gómez R, Muller R, Bouquey M, Rondin J, Serra CA, Hassouna F, Mouedden YE, Toniazzo V, Ruch D. Processing of nanocomposites PLA/graphite using a novel elongational mixing device. POLYM ENG SCI 2014. [DOI: 10.1002/pen.23869] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rigoberto Ibarra-Gómez
- Centro de Investigación en Materiales Avanzados S.C; Miguel de Cervantes 120, Complejo Industrial Chihuahua; Chihuahua 31109 México
| | - René Muller
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES); ECPM, Université de Strasbourg; 25 rue Becquerel 67087 Strasbourg France
| | - Michel Bouquey
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES); ECPM, Université de Strasbourg; 25 rue Becquerel 67087 Strasbourg France
| | - Jérôme Rondin
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES); ECPM, Université de Strasbourg; 25 rue Becquerel 67087 Strasbourg France
| | - Christophe A. Serra
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES); ECPM, Université de Strasbourg; 25 rue Becquerel 67087 Strasbourg France
| | - Fatima Hassouna
- Centre de Recherche Public Henri Tudor; 5 rue Bommel, ZAE Robert Steichen L-4940 Hautcharage Luxembourg
| | - Yamna El Mouedden
- Centre de Recherche Public Henri Tudor; 5 rue Bommel, ZAE Robert Steichen L-4940 Hautcharage Luxembourg
| | - Valérie Toniazzo
- Centre de Recherche Public Henri Tudor; 5 rue Bommel, ZAE Robert Steichen L-4940 Hautcharage Luxembourg
| | - David Ruch
- Centre de Recherche Public Henri Tudor; 5 rue Bommel, ZAE Robert Steichen L-4940 Hautcharage Luxembourg
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Kfoury G, Raquez JM, Hassouna F, Odent J, Toniazzo V, Ruch D, Dubois P. Recent advances in high performance poly(lactide): from "green" plasticization to super-tough materials via (reactive) compounding. Front Chem 2013; 1:32. [PMID: 24790960 PMCID: PMC3982567 DOI: 10.3389/fchem.2013.00032] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Accepted: 11/21/2013] [Indexed: 11/13/2022] Open
Abstract
Due to its origin from renewable resources, its biodegradability, and recently, its industrial implementation at low costs, poly(lactide) (PLA) is considered as one of the most promising ecological, bio-sourced and biodegradable plastic materials to potentially and increasingly replace traditional petroleum derived polymers in many commodity and engineering applications. Beside its relatively high rigidity [high tensile strength and modulus compared with many common thermoplastics such as poly(ethylene terephthalate) (PET), high impact poly(styrene) (HIPS) and poly(propylene) (PP)], PLA suffers from an inherent brittleness, which can limit its applications especially where mechanical toughness such as plastic deformation at high impact rates or elongation is required. Therefore, the curve plotting stiffness vs. impact resistance and ductility must be shifted to higher values for PLA-based materials, while being preferably fully bio-based and biodegradable upon the application. This review aims to establish a state of the art focused on the recent progresses and preferably economically viable strategies developed in the literature for significantly improve the mechanical performances of PLA. A particular attention is given to plasticization as well as to impact resistance modification of PLA in the case of (reactive) blending PLA-based systems.
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Affiliation(s)
- Georgio Kfoury
- Department of Advanced Materials and Structures, Public Research Center Henri Tudor Hautcharage, Luxembourg ; Laboratory of Polymeric and Composite Materials, UMONS Research Institute for Materials Science and Engineering, Center for Innovation and Research in Materials and Polymers, University of Mons Mons, Belgium
| | - Jean-Marie Raquez
- Laboratory of Polymeric and Composite Materials, UMONS Research Institute for Materials Science and Engineering, Center for Innovation and Research in Materials and Polymers, University of Mons Mons, Belgium
| | - Fatima Hassouna
- Department of Advanced Materials and Structures, Public Research Center Henri Tudor Hautcharage, Luxembourg
| | - Jérémy Odent
- Laboratory of Polymeric and Composite Materials, UMONS Research Institute for Materials Science and Engineering, Center for Innovation and Research in Materials and Polymers, University of Mons Mons, Belgium
| | - Valérie Toniazzo
- Department of Advanced Materials and Structures, Public Research Center Henri Tudor Hautcharage, Luxembourg
| | - David Ruch
- Department of Advanced Materials and Structures, Public Research Center Henri Tudor Hautcharage, Luxembourg
| | - Philippe Dubois
- Laboratory of Polymeric and Composite Materials, UMONS Research Institute for Materials Science and Engineering, Center for Innovation and Research in Materials and Polymers, University of Mons Mons, Belgium
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Mertz G, Hassouna F, Leclère P, Dahoun A, Toniazzo V, Ruch D. Correlation between (nano)-mechanical and chemical changes occurring during photo-oxidation of filled vulcanised styrene butadiene rubber (SBR). Polym Degrad Stab 2012. [DOI: 10.1016/j.polymdegradstab.2012.08.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Hassouna F, Kashyap S, Laachachi A, Ball V, Chapron D, Toniazzo V, Ruch D. Peculiar reduction of graphene oxide into graphene after diffusion in exponentially growing polyelectrolyte multilayers. J Colloid Interface Sci 2012; 377:489-96. [PMID: 22503661 DOI: 10.1016/j.jcis.2012.03.054] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2011] [Revised: 02/14/2012] [Accepted: 03/19/2012] [Indexed: 11/30/2022]
Abstract
In the present work, in situ reduction of graphene oxide (GO) into graphene was preformed, after diffusion in exponentially growing polyelectrolyte multilayers, using sodium citrate as the reducing agent. First, the graphene oxide was obtained by treating a commercial grade of Expanded Graphite (EG). Based on XRD and Raman spectroscopy results, a complete exfoliation of graphene nanopellets down to one layer was achieved during the oxidation process. Secondly, the diffusion of GO was carried out in an exponentially growing polyelectrolyte multilayer film made from poly(diallyldimethylammonium chloride) as the polycation and from poly(acrylic acid) as the polyanion. Electrical conductivity of the GO based films was measured during the reduction process as a function of time. The conductivity reached values of the order of 10(-4) S cm(-1), whereas the pristine polyelectrolyte multilayer was highly insulating (∼10(-8) S cm(-1)). The conductivity also reached a maximal value after about 24 h of reduction and decreased for longer reduction duration. Some tentative explanations for this peculiar finding will be given.
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Affiliation(s)
- F Hassouna
- Advanced Materials and Structures, Centre de Recherche Public Henri Tudor, 66 rue de Luxembourg, L-4002 Esch-sur-Alzette, Luxembourg
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Hassouna F, Raquez JM, Addiego F, Toniazzo V, Dubois P, Ruch D. New development on plasticized poly(lactide): Chemical grafting of citrate on PLA by reactive extrusion. Eur Polym J 2012. [DOI: 10.1016/j.eurpolymj.2011.12.001] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Hassouna F, Laachachi A, Chapron D, El Mouedden Y, Toniazzo V, Ruch D. Development of new approach based on Raman spectroscopy to study the dispersion of expanded graphite in poly(lactide). Polym Degrad Stab 2011. [DOI: 10.1016/j.polymdegradstab.2011.10.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Hassouna F, Raquez JM, Addiego F, Dubois P, Toniazzo V, Ruch D. New approach on the development of plasticized polylactide (PLA): Grafting of poly(ethylene glycol) (PEG) via reactive extrusion. Eur Polym J 2011. [DOI: 10.1016/j.eurpolymj.2011.08.001] [Citation(s) in RCA: 138] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Hassouna F, Mailhot G, Morlat-Thérias S, Gardette JL. Influence of iron salts on the photooxidation of poly(N-vinylpyrrolidone) in aqueous solution. J Photochem Photobiol A Chem 2011. [DOI: 10.1016/j.jphotochem.2011.01.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Hassouna F, Therias S, Mailhot G, Gardette JL. Photooxidation of poly(N-vinylpyrrolidone) (PVP) in the solid state and in aqueous solution. Polym Degrad Stab 2009. [DOI: 10.1016/j.polymdegradstab.2009.08.007] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hassouna F, Mailhot G, Morlat-Thérias S, Gardette JL. Photochemical behaviour of poly(ethylene oxide) (PEO) in aqueous solution: Influence of iron salts. J Photochem Photobiol A Chem 2008. [DOI: 10.1016/j.jphotochem.2007.09.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Castanet Y, Maerten E, Hassouna F, Couve-Bonnaire S, Mortreux A, Carpentier JF. Direct Synthesis of Benzoylpyridines from Chloropyridines via a Palladium-Carbene Catalyzed Carbonylative Suzuki Cross-Coupling Reaction. Synlett 2003. [DOI: 10.1055/s-2003-41472] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Messmer TO, Martinez J, Hassouna F, Zell ER, Harris W, Dowell S, Carlone GM. Comparison of two commercial microimmunofluorescence kits and an enzyme immunoassay kit for detection of serum immunoglobulin G antibodies to Chlamydia pneumoniae. Clin Diagn Lab Immunol 2001; 8:588-92. [PMID: 11329463 PMCID: PMC96106 DOI: 10.1128/cdli.8.3.588-592.2001] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We compared the MRL and the Labsystems Chlamydia pneumoniae microimmunofluorescence (MIF) immunoglobulin G (IgG) kits and the Labsystems enzyme immunoassay (EIA) kit in a blinded study of 83 serum samples in which we evaluated titers, cross-reactivity to other species, and reproducibility. There was no statistically significant difference between the MRL and the Labsystems MIF kits in the endpoint titers of IgG antibody to C. pneumoniae. The correlation between the results obtained with these two MIF kits was excellent (r = 0.95; P = 0.001). The cross-reactivity of the C. pneumoniae-positive sera with C. trachomatis- and C. psittaci-positive sera was assessed for each MIF kit. For C. pneumoniae-positive sera with titers of > or =32, the Labsystems MIF kit exhibited more cross-reactivity to C. psittaci than the MRL kit did. The values obtained with the Labsystems EIA kit represented single dilutions of serum specimens expressed as enzymeimmuno units on a continuous scale. The results obtained with the Labsystems EIA kit correlated moderately well with those obtained with each MIF kit when they were compared for their abilities to detect IgG antibodies to C. pneumoniae (for the MRL MIF kit, r = 0.79 [P = 0.001]; for the Labsystems MIF kit, r = 0.78 [P = 0.001]). The results obtained with the commercial MRL and Labsystems MIF kits and the Labsystems EIA kit tested were reproducible; and the kits were standardized, had quality control reagents, and are suitable for detection of C. pneumoniae antibodies in serum and for use in interlaboratory studies. Validation of the use of these kits for clinical diagnosis still needs further evaluation.
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Affiliation(s)
- T O Messmer
- Division of Bacterial and Mycotic Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA.
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