1
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Denduyver P, Birk G, Ambruosi A, Vervaet C, Vanhoorne V. Evaluation of Polyvinyl Alcohol as Binder during Continuous Twin Screw Wet Granulation. Pharmaceutics 2024; 16:854. [PMID: 39065551 PMCID: PMC11280237 DOI: 10.3390/pharmaceutics16070854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Revised: 06/07/2024] [Accepted: 06/14/2024] [Indexed: 07/28/2024] Open
Abstract
Binder selection is a crucial step in continuous twin-screw wet granulation (TSWG), as the material experiences a much shorter residence time (2-40 s) in the granulator barrel compared to batch-wise granulation processes. Polyvinyl alcohol (PVA) 4-88 was identified as an effective binder during TSWG, but the potential of other PVA grades-differing in polymerization and hydrolysis degree-has not yet been studied. Therefore, the aim of the current study was to evaluate the potential of different PVA grades as a binder during TSWG. The breakage and drying behavior during the fluidized bed drying of drug-loaded granules containing the PVA grades was also studied. Three PVA grades (4-88, 18-88, and 40-88) were characterized and their attributes were compared to previously investigated binders by Vandevivere et al. through principal component analysis. Three binder clusters could be distinguished according to their attributes, whereby each cluster contained a PVA grade and a previously investigated binder. PVA 4-88 was the most effective binder of the PVA grades for both a good water-soluble and water-insoluble formulation. This could be attributed to its high total surface energy, low viscosity, good wettability of hydrophilic and hydrophobic surfaces, and good wettability by water of the binder. Compared to the previously investigated binders, all PVA grades were more effective in the water-insoluble formulation, as they yielded strong granules (friability below 30%) at lower L/S-ratios. This was linked to the high dispersive surface energy of the high-energy sites on the surface of PVA grades and their low surface tension. During fluidized bed drying, PVA grades proved suitable binders, as the acetaminophen (APAP) granules were dried within a short time due to the low L/S-ratio, at which high-quality granules could be produced. In addition, no attrition occurred, and strong tablets were obtained. Based on this study, PVA could be the preferred binder during twin screw granulation due to its high binder effectiveness at a low L/S-ratio, allowing efficient downstream processing. However, process robustness must be controlled by the included excipients, as PVA grades are operating in a narrow L/S-ratio range.
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Affiliation(s)
- Phaedra Denduyver
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium; (P.D.); (C.V.)
| | - Gudrun Birk
- Merck KGaA, Frankfuter Str. 250, 64293 Darmstadt, Germany; (G.B.); (A.A.)
| | | | - Chris Vervaet
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium; (P.D.); (C.V.)
| | - Valérie Vanhoorne
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium; (P.D.); (C.V.)
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2
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Sygusch J, Duempelmann R, Meyer R, Adamska K, Strzemiecka B, Enke D, Rudolph M, Brendlé E. Reproducibility of inverse gas chromatography under infinite dilution: Results and interpretations of an interlaboratory study. J Chromatogr A 2024; 1714:464526. [PMID: 38071876 DOI: 10.1016/j.chroma.2023.464526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 11/03/2023] [Accepted: 11/20/2023] [Indexed: 01/05/2024]
Abstract
Over the last years, inverse gas chromatography (IGC) proved to be a versatile and sensitive analytical technique for physicochemical properties. However, the comparability of results obtained by different users and devices remains a topic for debate. This is the first time, an interlaboratory study using different types of IGC instruments is reported. Eight organizations with different IGC devices defined a common lab measurement protocol to analyse two standard materials, silica and lactose. All data was collected in a standard result form and has been treated identically with the objective to identify experimentally observed differences and not potentially different data treatments. The calculated values of the dispersive surface energy vary quite significantly (silica: 22 mJ/m2 - 34 mJ/m2, lactose 37 mJ/m2 - 51 mJ/m2) and so do the ISP values and retention volumes for both materials. This points towards significant and seemingly undiscovered differences in the operation of the instruments and the obtained underlying primary data, even under the premise of standard conditions. Variations are independent of the instrument type and uncertainties in flow rates or the injected quantities of probe molecules may be potential factors for the differences. This interlaboratory study demonstrates that the IGC is a very sensitive analytical tool, which detects minor changes, but it also shows that for a proper comparison, the measurement conditions have to be checked with great care. A publicly available standard protocol and material, for which this study can be seen as a starting point, is still needed to judge on the measurements and the resulting parameters more objectively.
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Affiliation(s)
- Johanna Sygusch
- Helmholtz-Zentrum Dresden-Rossendorf, Helmholtz Institute Freiberg for Resource Technology, Chemnitzer Straße 40, Freiberg 09599, Germany.
| | | | - Ralf Meyer
- Leipzig University, Institute of Chemical Technology, Linnéstr. 3, 04103 Leipzig, Germany
| | - Katarzyna Adamska
- Poznan University of Technology, Institute of Chemical Technology and Engineering, ul. Berdychowo 4, 60-965 Poznań, Poland
| | - Beata Strzemiecka
- Poznan University of Technology, Institute of Chemical Technology and Engineering, ul. Berdychowo 4, 60-965 Poznań, Poland
| | - Dirk Enke
- Leipzig University, Institute of Chemical Technology, Linnéstr. 3, 04103 Leipzig, Germany
| | - Martin Rudolph
- Helmholtz-Zentrum Dresden-Rossendorf, Helmholtz Institute Freiberg for Resource Technology, Chemnitzer Straße 40, Freiberg 09599, Germany
| | - Eric Brendlé
- Adscientis SARL, Parc Secoia, 1 rue Alfred Kastler, 68310 Wittelsheim, France
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3
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Zellnitz-Neugebauer S, Lanzinger M, Schroettner H, Naderi M, Guo M, Paudel A, Gruber-Woelfler H, Neugebauer P. Temperature cycling-induced formation of crystalline coatings. Int J Pharm 2023; 632:122577. [PMID: 36596318 DOI: 10.1016/j.ijpharm.2022.122577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 12/28/2022] [Accepted: 12/29/2022] [Indexed: 01/01/2023]
Abstract
The surface of particles is the hotspot of interaction with their environment and is therefore a major target for particle engineering. Particles with tailored coatings are greatly desired for a range of different applications. Amorphous coatings applied via film coating or microencapsulation have frequently been described in the pharmaceutical context and usually result in homogeneous surfaces. In the present study we have been exploring the feasibility of coating core particles with crystalline substances, a matter that has rarely been investigated. The expansion of the range of possible coating materials to include small organic molecules enables completely new product properties to be achieved. We present an approach based on temperature cycles performed in a tubular crystallizer to result in engineered crystalline coatings on excipient core particles. By manipulating the process settings and by the choice of coating substance we are able to tailor surface roughness, topography as well as surface chemistry. Benefits of our approach are demonstrated by using resulting particles as carriers in dry-powder-inhaler formulations. Depending on the resulting surface chemistry and surface roughness, coated carrier particles show varying fitness for delivering the model API salbutamol sulphate to the lung.
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Affiliation(s)
| | - Magdalena Lanzinger
- Institute of Process and Particle Engineering, Graz University of Technology, Graz 8010, Austria
| | - Hartmuth Schroettner
- Institute of Electron Microscopy and Nanoanalysis (FELMI), Graz University of Technology, Graz 8010, Austria; Graz Centre for Electron Microscopy (ZFE), Graz 8010, Austria
| | - Majid Naderi
- Surface Measurement Systems Ltd., London HA0 4PE, United Kingdom
| | - Meishan Guo
- Surface Measurement Systems Ltd., London HA0 4PE, United Kingdom
| | - Amrit Paudel
- Research Center Pharmaceutical Engineering GmbH, Graz 8010, Austria; Institute of Process and Particle Engineering, Graz University of Technology, Graz 8010, Austria
| | - Heidrun Gruber-Woelfler
- Research Center Pharmaceutical Engineering GmbH, Graz 8010, Austria; Institute of Process and Particle Engineering, Graz University of Technology, Graz 8010, Austria
| | - Peter Neugebauer
- Research Center Pharmaceutical Engineering GmbH, Graz 8010, Austria; Institute of Process and Particle Engineering, Graz University of Technology, Graz 8010, Austria.
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4
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Klitou P, Rosbottom I, Karde V, Heng JY, Simone E. Relating Crystal Structure to Surface Properties: A Study on Quercetin Solid Forms. CRYSTAL GROWTH & DESIGN 2022; 22:6103-6113. [PMID: 36217418 PMCID: PMC9542717 DOI: 10.1021/acs.cgd.2c00707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 09/05/2022] [Indexed: 06/16/2023]
Abstract
The surface energy and surface chemistry of a crystal are of great importance when designing particles for a specific application, as these will impact both downstream manufacturing processes as well as final product quality. In this work, the surface properties of two different quercetin solvates (quercetin dihydrate and quercetin DMSO solvate) were studied using molecular (synthonic) modeling and experimental techniques, including inverse gas chromatography (IGC) and contact angle measurements, to establish a relationship between crystal structure and surface properties. The attachment energy model was used to predict morphologies and calculate surface properties through the study of their growth synthons. The modeling results confirmed the surface chemistry anisotropy for the two forms. For quercetin dihydrate, the {010} facets were found to grow mainly by nonpolar offset quercetin-quercetin stacking interactions, thus being hydrophobic, while the {100} facets were expected to be hydrophilic, growing by a polar quercetin-water hydrogen bond. For QDMSO, the dominant facet {002} grows by a strong polar quercetin-quercetin hydrogen bonding interaction, while the second most dominant facet {011} grows by nonpolar π-π stacking interactions. Water contact angle measurements and IGC confirmed a greater overall surface hydrophilicity for QDMSO compared to QDH and demonstrated surface energy heterogeneity for both structures. This work shows how synthonic modeling can help in the prediction of the surface nature of crystalline particles and guide the choice of parameters that will determine the optimal crystal form and final morphology for targeted surface properties, for example, the choice of crystallization conditions, choice of solvent, or presence of additives or impurities, which can direct the crystallization of a specific crystal form or crystal shape.
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Affiliation(s)
- Panayiotis Klitou
- School
of Food Science and Nutrition, Food Colloids and Bioprocessing Group, University of Leeds, Woodhouse Ln., Woodhouse, LeedsLS2 9JT, United Kingdom
| | - Ian Rosbottom
- Department
of Chemical Engineering, Imperial College
London, Imperial College Rd, South Kensington, LondonSW7 2AZ, United Kingdom
| | - Vikram Karde
- Department
of Chemical Engineering, Imperial College
London, Imperial College Rd, South Kensington, LondonSW7 2AZ, United Kingdom
| | - Jerry Y.Y. Heng
- Department
of Chemical Engineering, Imperial College
London, Imperial College Rd, South Kensington, LondonSW7 2AZ, United Kingdom
| | - Elena Simone
- School
of Food Science and Nutrition, Food Colloids and Bioprocessing Group, University of Leeds, Woodhouse Ln., Woodhouse, LeedsLS2 9JT, United Kingdom
- Department
of Applied Science and Technology, Politecnico
di Torino, Corso Duca degli Abruzzi, 24, 10129TorinoTO, Italy
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5
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Proof-of-Concept for Adjusted Surface Energies and Modified Fines as a Novel Concept in Particle Engineering for DPI Formulations. Pharmaceutics 2022; 14:pharmaceutics14050951. [PMID: 35631537 PMCID: PMC9145343 DOI: 10.3390/pharmaceutics14050951] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 04/11/2022] [Accepted: 04/26/2022] [Indexed: 12/10/2022] Open
Abstract
Currently marketed dry powder inhaler (DPI) medicine lacks drug delivery performance due to insufficient powder dispersion. In carrier-based blends, incomplete drug detachment is typically attributed to excessive adhesion forces between carrier and drug particles. Adding force control agents (FCA) is known to increase drug detachment. Several researchers accounted this effect to a decrease in carrier surface energy (SE). In turn, an increase in SE should impede drug detachment. In this proof-of-concept study, we investigated the influence of the SE of the carrier material in binary blends by intentionally inverting the FCA approach. We increased SEs by dry particle coating utilising high-shear mixing, which resulted in decreased respirable fractions of the respective blends. Thus, we confirmed the SE of the carrier influences drug delivery and should be considered in formulation approaches. Complementing engineering techniques on the carrier level, we evaluated a method to modify the SE of extrinsic fines in ternary powder blends for inhalation. By the co-milling of fine lactose and an additive, we tailored the SE and hence the adhesiveness of additional fine excipients. Thus, the extent and the strength of drug–fines agglomerates may be controllable. For ternary DPI formulations, this work highlights the potential benefits of matching the SE of both fines and drugs.
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6
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Surface energy considerations in ternary powder blends for inhalation. Int J Pharm 2021; 609:121189. [PMID: 34662648 DOI: 10.1016/j.ijpharm.2021.121189] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 10/09/2021] [Accepted: 10/11/2021] [Indexed: 11/21/2022]
Abstract
The need for optimisation of DPI formulations is a main research motivation in respiratory drug delivery. Well-established formulations like carrier-based blends still show a lack of efficiency. The addition of extrinsic fine excipients is extensively discussed since decades, supported by a wide range of solid-state characteristics to understand their mechanism and classify influencing parameters. The first part of this study aims at comparing the surface energies of lactose fines and their corresponding influence on the aerodynamic performance of the respective ternary blends. Five different fine lactose qualities with varying origins were used, which were distinguishable in terms of surface energy, but comparable regarding particle size, moisture content and chemical composition. It demonstrates the crucial influence of adhesion properties of fines, based on different surface energies. Secondly, one specific fine lactose quality was used on fundamentally different lactose carriers, which highlights the negligible influence of carrier properties if extrinsic fines are preferentially capable of excipient-drug interactions.
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7
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Işik B, Çakar F, Cankurtaran H, Cankurtaran Ö. Evaluation of the surface properties of 4-(Decyloxy) benzoic acid liquid crystal and its use in structural isomer separation. Turk J Chem 2021; 45:845-857. [PMID: 34385871 PMCID: PMC8326467 DOI: 10.3906/kim-2101-13] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 03/26/2021] [Indexed: 12/18/2022] Open
Abstract
The selectivity of 4-(Decyloxy) benzoic acid (DBA) liquid crystal in surface adsorption region (303.2–328.2 K) and thermodynamic region (423.2 – 433.2 K) was investigated by inverse gas chromatography at infinite dilution (IGC-ID). The selectivity parameters of the structural isomer series named butyl acetate, butyl alcohol, and amyl alcohol series were calculated for the DBA using IGC-ID technique. Additionally, the surface properties including dispersive surface energy (gS D), free energy (DGA S), enthalpy (DHA S), and acidity-basicity constants were calculated with net retention volumes obtained from IGC-ID experiment results. When the DHA S and DGA S are constants, DBA surface was found to be an acidic character (KD/KA @ 0.89).
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Affiliation(s)
- Birol Işik
- Department of Chemistry, Faculty of Arts and Science, Yıldız Technical University, İstanbul Turkey
| | - Fatih Çakar
- Department of Chemistry, Faculty of Arts and Science, Yıldız Technical University, İstanbul Turkey
| | - Hüsnü Cankurtaran
- Department of Chemistry, Faculty of Arts and Science, Yıldız Technical University, İstanbul Turkey
| | - Özlem Cankurtaran
- Department of Chemistry, Faculty of Arts and Science, Yıldız Technical University, İstanbul Turkey
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8
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Hadjittofis E, Vargas SM, Litster JD, Sedransk Campbell KL. Τhe role of surface energy in the apparent solubility of two different calcite crystal habits. Proc Math Phys Eng Sci 2021; 477:20210200. [PMID: 35153572 PMCID: PMC8385356 DOI: 10.1098/rspa.2021.0200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 07/22/2021] [Indexed: 11/12/2022] Open
Abstract
The interplay between polymorphism and facet-specific surface energy on the dissolution of crystals is examined in this work. It is shown that, using cationic additives, it is possible to produce star-shaped calcite crystals at very high supersaturations. In crystallization processes following the Ostwald rule of stages these star-shaped crystals appear to have higher solubility than both their rhombohedral counterparts and needle-shaped aragonite crystals. The vapour pressures of vaterite, aragonite, star-shaped calcite and rhombohedral calcite crystals are measured using thermogravimetric analysis and the corresponding enthalpies of melting are obtained. Using inverse gas chromatography, the surface energy of the aforementioned crystals is measured as well and the surface energy of the main crystal facets is calculated. Combining the effect of facet-specific surface energies and the enthalpies of melting on a modified version of the classical solubility equation for regular solutions, it is proved that the star-shaped calcite crystals can indeed have higher apparent solubility than aragonitecrystals.
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Affiliation(s)
- Eftychios Hadjittofis
- Department of Chemical and Biological Engineering, The University of Sheffield, Mappin Street, Sheffield S1 3JD, UK
- UCB Pharma SA, Chemin du Foriest, B-1420 Braine-l'Alleud, Belgium
| | | | - James D. Litster
- Department of Chemical and Biological Engineering, The University of Sheffield, Mappin Street, Sheffield S1 3JD, UK
| | - Kyra L. Sedransk Campbell
- Department of Chemical and Biological Engineering, The University of Sheffield, Mappin Street, Sheffield S1 3JD, UK
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9
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Padilla Espinosa IM, Jacobs TDB, Martini A. Evaluation of Force Fields for Molecular Dynamics Simulations of Platinum in Bulk and Nanoparticle Forms. J Chem Theory Comput 2021; 17:4486-4498. [PMID: 34061519 DOI: 10.1021/acs.jctc.1c00434] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Understanding the size- and shape-dependent properties of platinum nanoparticles is critical for enabling the design of nanoparticle-based applications with optimal and potentially tunable functionality. Toward this goal, we evaluated nine different empirical potentials with the purpose of accurately modeling faceted platinum nanoparticles using molecular dynamics simulation. First, the potentials were evaluated by computing bulk and surface properties-surface energy, lattice constant, stiffness constants, and the equation of state-and comparing these to prior experimental measurements and quantum mechanics calculations. Then, the potentials were assessed in terms of the stability of cubic and icosahedral nanoparticles with faces in the {100} and {111} planes, respectively. Although none of the force fields predicts all the evaluated properties with perfect accuracy, one potential-the embedded atom method formalism with a specific parameter set-was identified as best able to model platinum in both bulk and nanoparticle forms.
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Affiliation(s)
- Ingrid M Padilla Espinosa
- Department of Mechanical Engineering, University of California, Merced, Merced, California 95340, United States
| | - Tevis D B Jacobs
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Ashlie Martini
- Department of Mechanical Engineering, University of California, Merced, Merced, California 95340, United States
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10
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In-Depth Comparison of Dry Particle Coating Processes Used in DPI Particle Engineering. Pharmaceutics 2021; 13:pharmaceutics13040580. [PMID: 33921741 PMCID: PMC8073608 DOI: 10.3390/pharmaceutics13040580] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/08/2021] [Accepted: 04/16/2021] [Indexed: 11/17/2022] Open
Abstract
High-shear mixer coatings as well as mechanofusion processes are used in the particle-engineering of dry powder inhalation carrier systems. The aim of coating the carrier particle is usually to decrease carrier–drug adhesion. This study comprises the in-depth comparison of two established dry particle coating options. Both processes were conducted with and without a model additive (magnesium stearate). In doing so, changes in the behaviour of the processed particles can be traced back to either the process or the additive. It can be stated that the coarse model carrier showed no significant changes when processed without additives. By coating the particles with magnesium stearate, the surface energy decreased significantly. This leads to a significant enhancement of the aerodynamic performance of the respective carrier-based blends. Comparing the engineered carriers with each other, the high-shear mixer coating shows significant benefits, namely, lower drug–carrier adhesion and the higher efficiency of the coating process.
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11
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Cherukupally P, Sun W, Williams DR, Ozin GA, Bilton AM. Wax-wetting sponges for oil droplets recovery from frigid waters. SCIENCE ADVANCES 2021; 7:7/11/eabc7926. [PMID: 33692099 PMCID: PMC7946373 DOI: 10.1126/sciadv.abc7926] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 01/26/2021] [Indexed: 06/12/2023]
Abstract
Energy-efficient recovery of oil droplets from ice-cold water, such as oil sands tailings, marine, and arctic oil spills, is challenging. In particular, due to paraffin wax crystallization at low temperatures, the crude oil exhibits high viscosity, making it difficult to collect using simple solutions like sponges. Here, we report a wax-wetting sponge designed by conforming to the thermoresponsive microstructure of crude oil droplets. To address paraffin wax crystallization, we designed the sponge by coating a polyester polyurethane substrate with nanosilicon functionalized with paraffin-like octadecyl ligands. The wax-wetting sponge can adsorb oil droplets from wastewater between 5° and 40°C with 90 to 99% removal efficacy for 10 cycles. Also, upon rinsing with heptol, the adsorbed oil is released within seconds. The proposed approach of sponges designed to conform with the temperature-dependent microstructure of the crude oils could enable cold water technologies and improve circular economy metrics in the oil industry.
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Affiliation(s)
- P Cherukupally
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Canada.
- Department of Chemical Engineering, Imperial College London, London, UK
| | - W Sun
- Department of Chemistry, University of Toronto, Toronto, Canada
| | - D R Williams
- Department of Chemical Engineering, Imperial College London, London, UK
| | - G A Ozin
- Department of Chemistry, University of Toronto, Toronto, Canada.
| | - A M Bilton
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Canada.
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12
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Surface Characterization of Carbonaceous Materials Using Inverse Gas Chromatography: A Review. ELECTROCHEM 2020. [DOI: 10.3390/electrochem1040024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
It is essential to understand the adsorption of guest molecules on carbon-based materials for both theoretical and practical reasons. It is crucial to analyze the surface properties of carbon-based materials with a wide range of applications (e.g., catalyst supports, hydrogen storage, sensors, adsorbents, separation media, etc.). Inverse gas chromatography (IGC) as a powerful and sensitive technique can be used to characterize the surface physicochemical properties (i.e., Brunauer-Emmett-Teller (BET) surface area, surface energy heterogeneity, heat of adsorption, specific interaction of adsorption, work of cohesion, glass transition temperatures, solubility, and so forth) of various types of materials such as powders, films, and fibers. In this review, the principles, common methods, and application of IGC are discussed. In addition, the examples of various experiments developed for the IGC to characterize the carbonaceous materials (such as carbon nanotubes, graphite, and activated carbon) are discussed.
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13
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Palash M, Pal A, Rupam TH, Park BD, Saha BB. Surface energy characterization of different particulate silica gels at infinite dilution. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125209] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Ngeow YW, Williams DR, Chapman AV, Heng JYY. Surface Energy Mapping of Modified Silica Using IGC Technique at Finite Dilution. ACS OMEGA 2020; 5:10266-10275. [PMID: 32426583 PMCID: PMC7226851 DOI: 10.1021/acsomega.9b03920] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Accepted: 03/31/2020] [Indexed: 06/11/2023]
Abstract
The reinforcing silica filler, which can be more than 40% of an elastomer composite, plays a key role to achieve the desired mechanical properties in elastomer vulcanizates. However, the highly hydrophilic nature of silica surface causes silica particle aggregation. It remained a challenge for many tire manufacturers when using silica-filled elastomer compounds. Here, the silica surface energy changes when the surface is modified with coupling or noncoupling silanes; coupling silanes can covalently bond the silica to the elastomers. The surface energy of silica was determined using inverse gas chromatography (IGC) at finite dilution (FD-IGC) and found to be reduced by up to 50% when the silica surface was silanized. The spatial distribution of silica aggregates within the tire matrix is determined by transmission electron microscopy (TEM) and a direct correlation between aggregate size (silica microdispersion) and work of cohesion from IGC is reported, highlighting surface energy and work of cohesion being excellent indicators of the degree of dispersion of silica aggregates.
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Affiliation(s)
- Yen Wan Ngeow
- Technology
and Engineering Division, Malaysian Rubber
Board, 47000 Sungai Buloh, Selangor, Malaysia
| | - Daryl R. Williams
- Department
of Chemical Engineering, Imperial College
London, South Kensington Campus, London SW7 2AZ, United Kingdom
| | - Andrew V. Chapman
- Tun
Abdul Razak Research Centre, Brickendonbury, Hertford SG13 8NL, United Kingdom
| | - Jerry Y. Y. Heng
- Department
of Chemical Engineering, Imperial College
London, South Kensington Campus, London SW7 2AZ, United Kingdom
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15
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Influence of interparticle structuring on the surface energetics of a binary powder system. Int J Pharm 2020; 581:119295. [DOI: 10.1016/j.ijpharm.2020.119295] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 03/28/2020] [Accepted: 03/30/2020] [Indexed: 11/19/2022]
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16
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Surface properties of chitin-glucan nanopapers from Agaricus bisporus. Int J Biol Macromol 2020; 148:677-687. [PMID: 31954796 DOI: 10.1016/j.ijbiomac.2020.01.141] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 01/10/2020] [Accepted: 01/15/2020] [Indexed: 02/07/2023]
Abstract
The structural component of fungal cell walls comprises of chitin covalently bonded to glucan; this constitutes a native composite material (chitin-glucan, CG) combining the strength of chitin and the toughness of glucan. It has a native nano-fibrous structure in contrast to nanocellulose, for which further nanofibrillation is required. Nanopapers can be manufactured from fungal chitin nanofibrils (FChNFs). FChNF nanopapers are potentially applicable in packaging films, composites, or membranes for water treatment due to their distinct surface properties inherited from the composition of chitin and glucan. Here, chitin-glucan nanofibrils were extracted from common mushroom (Agaricus bisporus) cell walls utilizing a mild isolation procedure to preserve the native quality of the chitin-glucan complex. These extracts were readily disintegrated into nanofibre dimensions by a low-energy mechanical blending, thus making the extract dispersion directly suitable for nanopaper preparation using a simple vacuum filtration process. Chitin-glucan nanopaper morphology, mechanical, chemical, and surface properties were studied and compared to chitin nanopapers of crustacean (Cancer pagurus) origin. It was found that fungal extract nanopapers had distinct physico-chemical surface properties, being more hydrophobic than crustacean chitin.
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17
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Nguyen TTH, Hammond RB, Styliari ID, Murnane D, Roberts KJ. A digital workflow from crystallographic structure to single crystal particle attributes for predicting the formulation properties of terbutaline sulfate. CrystEngComm 2020. [DOI: 10.1039/d0ce00026d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A detailed inter-molecular (synthonic) analysis of terbutaline sulfate, an ionic addition salt for inhalation drug formulation, is related to its crystal morphology, the surface chemistry of the habit faces and hence to its crystal surface energy.
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Affiliation(s)
- Thai T. H. Nguyen
- Centre for the Digital Design of Drug Products
- School of Chemical and Process Engineering
- University of Leeds
- Leeds
- UK
| | - Robert B. Hammond
- Centre for the Digital Design of Drug Products
- School of Chemical and Process Engineering
- University of Leeds
- Leeds
- UK
| | | | - Darragh Murnane
- School of Life and Medical Sciences
- University of Hertfordshire
- UK
| | - Kevin J. Roberts
- Centre for the Digital Design of Drug Products
- School of Chemical and Process Engineering
- University of Leeds
- Leeds
- UK
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18
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Highly effective asphaltene-derived adsorbents for gas phase removal of volatile organic compounds. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.05.041] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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19
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Mangal S, Park H, Nour R, Shetty N, Cavallaro A, Zemlyanov D, Thalberg K, Puri V, Nicholas M, Narang AS, Zhou QT. Correlations between surface composition and aerosolization of jet-milled dry powder inhaler formulations with pharmaceutical lubricants. Int J Pharm 2019; 568:118504. [PMID: 31299339 DOI: 10.1016/j.ijpharm.2019.118504] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 07/03/2019] [Accepted: 07/07/2019] [Indexed: 11/30/2022]
Abstract
Co-jet-milling drugs and lubricants may enable simultaneous particle size reduction and surface coating to achieve satisfactory aerosolization performance. This study aims to establish the relationship between surface lubricant coverage and aerosolization behavior of a model drug (ciprofloxacin HCl) co-jet-milled with lubricants [magnesium stearate (MgSt) or l-leucine]. The co-jet-milled formulations were characterized for particle size, morphology, cohesion, Carr's index, and aerosolization performance. The surface lubricant coating was assessed by probing surface chemical composition using X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary-ion mass spectrometry (ToF-SIMS). The effects of co-jet-milling on the surface energy and in vitro dissolution of ciprofloxacin were also evaluated. Our results indicated that, in general, the ciprofloxacin co-jet-milled with l-leucine at >0.5% w/w showed a significant higher fine particle fraction (FPF) compared with the ciprofloxacin jet-milled alone. The FPF values plateau at or above 5% w/w for both MgSt and l-leucine. We have established the quantitative correlations between surface lubricant coverage and aerosolization in the tested range for each of the lubricants. More importantly, our results suggest different mechanisms to improve aerosolization for MgSt-coating and l-leucine-coating, respectively: MgSt-coating reduces inter-particulate interactions through the formation of low surface energy coating films, while l-leucine-coating not only reduces the surface energy but also creates rough particle surfaces that reduce inter-particulate contact area. Furthermore, surface coatings with 5% w/w MgSt (which is hydrophobic) did not lead to substantial changes in in vitro dissolution. Our findings have shown that the coating structure/quality and their effects could be highly dependent on the process and the coating material. The findings from this mechanistic study provide fundamental understanding of the critical effects of MgSt and l-leucine surface coverages on aerosolization and powder flow properties of inhalation particles.
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Affiliation(s)
- Sharad Mangal
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA
| | - Heejun Park
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA
| | - Reham Nour
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA
| | - Nivedita Shetty
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA
| | - Alex Cavallaro
- Future Industries Institute, University of South Australia, Mawson Lakes, SA 5095, Australia
| | - Dmitry Zemlyanov
- Birck Nanotechnology Center, Purdue University, West Lafayette, IN 47907, USA
| | - Kyrre Thalberg
- Inhalation Product Development, Pharmaceutical Technology & Development, AstraZeneca, Gothenburg, Sweden
| | - Vibha Puri
- Small Molecule Pharmaceutics Department, Genentech, Inc., One DNA Way, South San Francisco, CA 94080, USA
| | - Mark Nicholas
- Inhalation Product Development, Pharmaceutical Technology & Development, AstraZeneca, Gothenburg, Sweden
| | - Ajit S Narang
- Small Molecule Pharmaceutics Department, Genentech, Inc., One DNA Way, South San Francisco, CA 94080, USA
| | - Qi Tony Zhou
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA.
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20
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Školáková T, Souchová L, Patera J, Pultar M, Školáková A, Zámostný P. Prediction of drug-polymer interactions in binary mixtures using energy balance supported by inverse gas chromatography. Eur J Pharm Sci 2019; 130:247-259. [DOI: 10.1016/j.ejps.2019.01.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 01/17/2019] [Accepted: 01/20/2019] [Indexed: 11/30/2022]
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21
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Kafi A, Li Q, Chaffraix T, Khoo J, Gengenbach T, Magniez KJC. Surface treatment of carbon fibres for interfacial property enhancement in composites via surface deposition of water soluble POSS nanowhiskers. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.01.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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23
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Abstract
Topical absorbable hemostats are routinely utilized in surgical procedures to assist in controlling intraoperative bleeding. SURGICEL Original Absorbable Hemostat, one of the most frequently used adjunctive hemostats, is composed of oxidized regenerated cellulose (ORC). We report here that a novel powdered form of ORC, composed of aggregates of ORC fine fibers, provides additional valuable hemostatic performance characteristics and retains the biochemical and bactericidal profile of the parent ORC fabric. The ORC aggregates are more effective in promoting coagulation than their constituent ORC fine fibers because of more favorable surface energetics and surface area. Aggregates with similar particle size distributions that have higher sphericity values exhibit better coagulation efficacy. Finally, ORC aggregates more effectively promote clot formation than starch-based hemostatic particles. The results of this investigation indicate that the efficacy of this novel powdered hemostat is based on its chemical composition, morphology, and particle surface energetics.
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Affiliation(s)
| | | | - Melinda MacDonald
- Preclinical Center of Excellence, Johnson & Johnson Medical Devices Companies, Route 22 West, Somerville, New Jersey 08876-0151, United States
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24
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Tan G, Qu L, Morton DA, Larson I. A strategy to evaluate the surface energy of high packing efficiency fine powders via inverse gas chromatography. POWDER TECHNOL 2017. [DOI: 10.1016/j.powtec.2017.07.078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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25
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Effect of polymer type on the surface energy of acetaminophen solid dispersions prepared by melt method. Int J Pharm 2017; 530:107-112. [DOI: 10.1016/j.ijpharm.2017.07.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 07/04/2017] [Accepted: 07/08/2017] [Indexed: 11/21/2022]
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26
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Rudolph M, Hartmann R. Specific surface free energy component distributions and flotabilities of mineral microparticles in flotation—An inverse gas chromatography study. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2016.10.069] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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27
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Hadjittofis E, Zhang GGZ, Heng JYY. Influence of sample preparation on IGC measurements: the cases of silanised glass wool and packing structure. RSC Adv 2017. [DOI: 10.1039/c7ra00178a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A high amount of silanised wool can influence IGC measurements, especially for low surface energy/area materials.
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Affiliation(s)
- Eftychios Hadjittofis
- Surfaces and Particle Engineering Laboratory
- Department of Chemical Engineering
- Imperial College London
- London SW7 2AZ
- UK
| | - Geoff G. Z. Zhang
- Drug Product Development
- Research and Development
- AbbVie Inc
- North Chicago
- USA
| | - Jerry Y. Y. Heng
- Surfaces and Particle Engineering Laboratory
- Department of Chemical Engineering
- Imperial College London
- London SW7 2AZ
- UK
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28
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Smith RR, Shah UV, Parambil JV, Burnett DJ, Thielmann F, Heng JYY. The Effect of Polymorphism on Surface Energetics of D-Mannitol Polymorphs. AAPS JOURNAL 2016; 19:103-109. [DOI: 10.1208/s12248-016-9978-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 08/17/2016] [Indexed: 11/30/2022]
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29
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Du S, Zhang J, Zhou WT, Li QX, Greene GW, Zhu HJ, Li JL, Wang XG. Interactions between fibroin and sericin proteins from Antheraea pernyi and Bombyx mori silk fibers. J Colloid Interface Sci 2016; 478:316-23. [DOI: 10.1016/j.jcis.2016.06.030] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Revised: 06/09/2016] [Accepted: 06/09/2016] [Indexed: 01/20/2023]
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30
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Alloul H, Roques-Carmes T, Toufaily J, Kassir M, Pelletier M, Razafitianamaharavo A, Hamieh T, Villiéras F. Towards a better description of organosilane grafting onto silica particles using volumetric techniques based on molecular probing. ADSORPTION 2016. [DOI: 10.1007/s10450-016-9800-2] [Citation(s) in RCA: 8] [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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31
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Lapčík L, Otyepka M, Otyepková E, Lapčíková B, Gabriel R, Gavenda A, Prudilová B. Surface heterogeneity: Information from inverse gas chromatography and application to model pharmaceutical substances. Curr Opin Colloid Interface Sci 2016. [DOI: 10.1016/j.cocis.2016.06.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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32
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Jones MD, Buckton G. Comparison of the cohesion-adhesion balance approach to colloidal probe atomic force microscopy and the measurement of Hansen partial solubility parameters by inverse gas chromatography for the prediction of dry powder inhalation performance. Int J Pharm 2016; 509:419-430. [PMID: 27265314 DOI: 10.1016/j.ijpharm.2016.06.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 05/20/2016] [Accepted: 06/01/2016] [Indexed: 10/21/2022]
Abstract
The abilities of the cohesive-adhesive balance approach to atomic force microscopy (AFM) and the measurement of Hansen partial solubility parameters by inverse gas chromatography (IGC) to predict the performance of carrier-based dry powder inhaler (DPI) formulations were compared. Five model drugs (beclometasone dipropionate, budesonide, salbutamol sulphate, terbutaline sulphate and triamcinolone acetonide) and three model carriers (erythritol, α-lactose monohydrate and d-mannitol) were chosen, giving fifteen drug-carrier combinations. Comparison of the AFM and IGC interparticulate adhesion data suggested that they did not produce equivalent results. Comparison of the AFM data with the in vitro fine particle delivery of appropriate DPI formulations normalised to account for particle size differences revealed a previously observed pattern for the AFM measurements, with a slightly cohesive AFM CAB ratio being associated with the highest fine particle fraction. However, no consistent relationship between formulation performance and the IGC data was observed. The results as a whole highlight the complexity of the many interacting variables that can affect the behaviour of DPIs and suggest that the prediction of their performance from a single measurement is unlikely to be successful in every case.
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Affiliation(s)
- Matthew D Jones
- Department of Pharmaceutics, UCL School of Pharmacy, 29-39 Brunswick Square, London, WC1N 1AX, United Kingdom; Department of Pharmacy and Pharmacology, University of Bath, Bath, BA2 7AY, United Kingdom.
| | - Graham Buckton
- Department of Pharmaceutics, UCL School of Pharmacy, 29-39 Brunswick Square, London, WC1N 1AX, United Kingdom.
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33
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Williams DR. Particle engineering in pharmaceutical solids processing: surface energy considerations. Curr Pharm Des 2016; 21:2677-94. [PMID: 25876912 PMCID: PMC5421142 DOI: 10.2174/1381612821666150416100319] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Accepted: 04/07/2015] [Indexed: 11/22/2022]
Abstract
During the past 10 years particle engineering in the pharmaceutical industry has become a topic of increasing importance. Engineers and pharmacists need to understand and control a range of key unit manufacturing operations such as milling, granulation, crystallisation, powder mixing and dry powder inhaled drugs which can be very challenging. It has now become very clear that in many of these particle processing operations, the surface energy of the starting, intermediate or final products is a key factor in understanding the processing operation and or the final product performance. This review will consider the surface energy and surface energy heterogeneity of crystalline solids, methods for the measurement of surface energy, effects of milling on powder surface energy, adhesion and cohesion on powder mixtures, crystal habits and surface energy, surface energy and powder granulation processes, performance of DPI systems and finally crystallisation conditions and surface energy. This review will conclude that the importance of surface energy as a significant factor in understanding the performance of many particulate pharmaceutical products and processes has now been clearly established. It is still nevertheless, work in progress both in terms of development of methods and establishing the limits for when surface energy is the key variable of relevance.
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Affiliation(s)
- Daryl R Williams
- Department of Chemical Engineering, Imperial College London, Prince Consort Road, Kensington London SW7 2AZ, United Kingdom.
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34
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Ferguson A, Khan U, Walsh M, Lee KY, Bismarck A, Shaffer MSP, Coleman JN, Bergin SD. Understanding the Dispersion and Assembly of Bacterial Cellulose in Organic Solvents. Biomacromolecules 2016; 17:1845-53. [PMID: 27007744 DOI: 10.1021/acs.biomac.6b00278] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The constituent nanofibrils of bacterial cellulose are of interest to many researchers because of their purity and excellent mechanical properties. Mechanisms to disrupt the network structure of bacterial cellulose (BC) to isolate bacterial cellulose nanofibrils (BCN) are limited. This work focuses on liquid-phase dispersions of BCN in a range of organic solvents. It builds on work to disperse similarly intractable nanomaterials, such as single-walled carbon nanotubes, where optimum dispersion is seen for solvents whose surface energies are close to the surface energy of the nanomaterial; bacterial cellulose is shown to disperse in a similar fashion. Inverse gas chromatography was used to determine the surface energy of bacterial cellulose, under relevant conditions, by quantifying the surface heterogeneity of the material as a function of coverage. Films of pure BCN were prepared from dispersions in a range of solvents; the extent of BCN exfoliation is shown to have a strong effect on the mechanical properties of BC films and to fit models based on the volumetric density of nanofibril junctions. Such control offers new routes to producing robust cellulose films of bacterial cellulose nanofibrils.
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Affiliation(s)
- Auren Ferguson
- School of Physics and CRANN, Trinity College Dublin , Dublin 2, Ireland
| | - Umar Khan
- School of Physics and CRANN, Trinity College Dublin , Dublin 2, Ireland
| | | | | | - Alexander Bismarck
- Polymer and Composite Engineering (PaCE) Group, Institute of Materials Chemistry and Research, Faculty of Chemistry, University of Vienna , Währingerstr. 42, Vienna A-1090, Austria
| | | | | | - Shane D Bergin
- School of Physics and CRANN, Trinity College Dublin , Dublin 2, Ireland
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35
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Jong T, Li J, Morton DAV, Zhou QT, Larson I. Investigation of the Changes in Aerosolization Behavior Between the Jet-Milled and Spray-Dried Colistin Powders Through Surface Energy Characterization. J Pharm Sci 2016; 105:1156-63. [PMID: 26886330 DOI: 10.1016/s0022-3549(15)00189-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 12/01/2015] [Accepted: 12/04/2015] [Indexed: 11/19/2022]
Abstract
This study aimed to investigate the surface energy factors behind improved aerosolization performance of spray-dried colistin powder formulations compared with those produced by jet milling. Inhalable colistin powder formulations were produced by jet milling or spray drying (with or without l-leucine). Scanning electron micrographs showed the jet-milled particles had irregularly angular shapes, whereas the spray-dried particles were more spherical. Significantly higher fine particle fractions were measured for the spray-dried (43.8%-49.6%) versus the jet-milled formulation (28.4%) from a Rotahaler at 60 L/min; albeit the size distribution of the jet-milled powder was smaller. Surprisingly, addition of l-leucine in the spray drying feed solution gave no significant improvement in fine particle fraction. As measured by inverse gas chromatography, spray-dried formulations had significantly (p < 0.001) lower dispersive, specific, and total surface energy values and more uniform surface energy distributions than the jet-milled powder. Interestingly, no significant difference was measured in the specific and total surface energy values between the spray-dried formulation with or without l-leucine. Based on our previous findings in the self-assembling behavior of colistin in aqueous solution and the surface energy data obtained here, we propose the self-assembly of colistin molecules during spray drying contributed significantly to the reduction of surface free energy and the superior aerosolization performance.
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Affiliation(s)
- Teresa Jong
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia
| | - Jian Li
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia
| | - David A V Morton
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia.
| | - Qi Tony Zhou
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907-2091.
| | - Ian Larson
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia.
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36
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Yao Z, Ge L, Yang W, Xia M, Ji X, Jin M, Tang J, Dienstmaier J. Finite Dilution Inverse Gas Chromatography as a Versatile Tool To Determine the Surface Properties of Biofillers for Plastic Composite Applications. Anal Chem 2015; 87:6724-9. [DOI: 10.1021/acs.analchem.5b01004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhitong Yao
- College of Materials
Science and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Liuqin Ge
- Ocean College, Zhejiang University, Hangzhou 310058, China
| | - Wenye Yang
- Ocean College, Zhejiang University, Hangzhou 310058, China
| | - Meisheng Xia
- Ocean College, Zhejiang University, Hangzhou 310058, China
| | - Xiaosheng Ji
- Ocean College, Zhejiang University, Hangzhou 310058, China
| | - Meiqing Jin
- College of Materials
Science and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Junhong Tang
- College of Materials
Science and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Jürgen Dienstmaier
- Surface Measurement
Systems Limited, 5 Wharfside, Rosemont
Road, London, HA0 4PE, United Kingdom
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37
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Mangal S, Meiser F, Tan G, Gengenbach T, Denman J, Rowles MR, Larson I, Morton DAV. Relationship between surface concentration of L-leucine and bulk powder properties in spray dried formulations. Eur J Pharm Biopharm 2015; 94:160-9. [PMID: 26007290 DOI: 10.1016/j.ejpb.2015.04.035] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Accepted: 04/29/2015] [Indexed: 11/29/2022]
Abstract
The amino acid L-leucine has been demonstrated to act as a lubricant and improve the dispersibility of otherwise cohesive fine particles. It was hypothesized that optimum surface L-leucine concentration is necessary to achieve optimal surface and bulk powder properties. Polyvinylpyrrolidone was spray dried with different concentration of L-leucine and the change in surface composition of the formulations was determined using X-ray photoelectron spectroscopy (XPS) and time of flight-secondary ion mass spectrometry (ToF-SIMS). The formulations were also subjected to powder X-ray diffraction analysis in order to understand the relationship between surface concentration and solid-state properties of L-leucine. In addition, the morphology, surface energy and bulk cohesion of spray dried formulations were also assessed to understand the relation between surface L-leucine concentration and surface and bulk properties. The surface concentration of L-leucine increased with higher feed concentrations and plateaued at about 10% L-leucine. Higher surface L-leucine concentration also resulted in the formation of larger L-leucine crystals and not much change in crystal size was noted above 10% L-leucine. A change in surface morphology of particles from spherical to increasingly corrugated was also observed with increasing surface l-leucine concentration. Specific collapsed/folded over particles were only seen in formulations with 10% or higher l-leucine feed concentration suggesting a change in particle surface formation process. In addition, bulk cohesion also reduced and approached a minimum with 10% L-leucine concentration. Thus, the surface concentration of L-leucine governs particle formation and optimum surface L-leucine concentration results in optimum surface and bulk powder properties.
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Affiliation(s)
- Sharad Mangal
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
| | - Felix Meiser
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
| | - Geoffrey Tan
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
| | - Thomas Gengenbach
- CSIRO Materials Science and Engineering, Bayview Avenue, Clayton, VIC 3168, Australia
| | - John Denman
- Ian Wark Research Institute, University of South Australia, Mawson Lakes, SA 5095, Australia
| | - Matthew R Rowles
- Melbourne School of Engineering, The University of Melbourne, VIC 3010, Australia
| | - Ian Larson
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia.
| | - David A V Morton
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia.
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38
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Relationship between processing, surface energy and bulk properties of ultrafine silk particles. POWDER TECHNOL 2015. [DOI: 10.1016/j.powtec.2014.10.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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39
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Zhang J, Du S, Kafi A, Fox B, Li JL, Liu XY, Rajkhowa R, Wang XG. Surface energy of silk fibroin and mechanical properties of silk cocoon composites. RSC Adv 2015. [DOI: 10.1039/c4ra09482d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Both the physical and physiochemical properties of domestic and wild silkworm silk fibroin were studied, including surface energy and surface energy heterogeneity.
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Affiliation(s)
- J. Zhang
- Australian Future Fibres Research and Innovation Centre
- Institute for Frontier Materials
- Deakin University
- Australia
| | - S. Du
- Australian Future Fibres Research and Innovation Centre
- Institute for Frontier Materials
- Deakin University
- Australia
| | - A. Kafi
- Australian Future Fibres Research and Innovation Centre
- Institute for Frontier Materials
- Deakin University
- Australia
| | - B. Fox
- Australian Future Fibres Research and Innovation Centre
- Institute for Frontier Materials
- Deakin University
- Australia
| | - J. L. Li
- Australian Future Fibres Research and Innovation Centre
- Institute for Frontier Materials
- Deakin University
- Australia
| | - X. Y. Liu
- Biophysics and Micro/Nanostructures Lab
- Department of Physics
- Faculty of Science
- National University of Singapore
- Singapore
| | - R. Rajkhowa
- Australian Future Fibres Research and Innovation Centre
- Institute for Frontier Materials
- Deakin University
- Australia
| | - X. G. Wang
- Australian Future Fibres Research and Innovation Centre
- Institute for Frontier Materials
- Deakin University
- Australia
- School of Textile Science and Engineering
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40
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Mohammadi-Jam S, Waters K. Inverse gas chromatography applications: a review. Adv Colloid Interface Sci 2014; 212:21-44. [PMID: 25092057 DOI: 10.1016/j.cis.2014.07.002] [Citation(s) in RCA: 115] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Revised: 07/07/2014] [Accepted: 07/08/2014] [Indexed: 11/27/2022]
Abstract
Inverse gas chromatography (IGC) is a versatile, powerful, sensitive and relatively fast technique for characterizing the physicochemical properties of materials. Due to its applicability in determining surface properties of solids in any form such as films, fibres and powders of both crystalline and amorphous structures, IGC became a popular technique for surface characterization, used extensively soon after its development. One of the most appealing features of IGC that led to its popularity among analytical scientists in early years was its similarity in principle to analytical gas chromatography (GC). The main aspect which distinguishes IGC experiments from conventional GC is the role of mobile and stationary phases. Contrary to conventional GC, the material under investigation is placed in the chromatographic column and a known probe vapour is used to provide information on the surface. In this review, information concerning the history, instrumentation and applications is discussed. Examples of the many experiments developed for IGC method are selected and described. Materials that have been analysed include polymers, pharmaceuticals, minerals, surfactants, and nanomaterials. The properties that can be determined using the IGC technique include enthalpy and entropy of sorption, surface energy (dispersive and specific components), work of co/adhesion, miscibility and solubility parameters, surface heterogeneity, glass transition temperature, and specific surface area.
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Cares-Pacheco MG, Vaca-Medina G, Calvet R, Espitalier F, Letourneau JJ, Rouilly A, Rodier E. Physicochemical characterization of D-mannitol polymorphs: the challenging surface energy determination by inverse gas chromatography in the infinite dilution region. Int J Pharm 2014; 475:69-81. [PMID: 25151549 DOI: 10.1016/j.ijpharm.2014.08.029] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 08/15/2014] [Accepted: 08/17/2014] [Indexed: 11/27/2022]
Abstract
Nowadays, it is well known that surface interactions play a preponderant role in mechanical operations, which are fundamental in pharmaceutical processing and formulation. Nevertheless, it is difficult to correlate surface behaviour in processes to physical properties measurement. Indeed, most pharmaceutical solids have multiple surface energies because of varying forms, crystal faces and impurities contents or physical defects, among others. In this paper, D-mannitol polymorphs (α, β and δ) were studied through different characterization techniques highlighting bulk and surface behaviour differences. Due to the low adsorption behaviour of β and δ polymorphs, special emphasis has been paid to surface energy analysis by inverse gas chromatography, IGC. Surface energy behaviour has been studied in Henry's domain showing that, for some organic solids, the classical IGC infinite dilution zone is never reached. IGC studies highlighted, without precedent in literature, dispersive surface energy differences between α and β mannitol, with a most energetically active α form with a γ(s)(d) of 74.9 mJ·m⁻². Surface heterogeneity studies showed a highly heterogeneous α mannitol with a more homogeneous β (40.0 mJ·m⁻²) and δ mannitol (40.3 mJ·m⁻²). Moreover, these last two forms behaved similarly considering surface energy at different probe concentrations.
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Affiliation(s)
- M G Cares-Pacheco
- Université de Toulouse, Mines Albi, UMR CNRS 5302, Centre RAPSODEE, Campus Jarlard, Albi cedex 09 F-81013, France.
| | - G Vaca-Medina
- Université de Toulouse, INP-ENSIACET, LCA, Toulouse 310130, France; INRA, UMR 1010 CAI, Toulouse 310130, France
| | - R Calvet
- Université de Toulouse, Mines Albi, UMR CNRS 5302, Centre RAPSODEE, Campus Jarlard, Albi cedex 09 F-81013, France
| | - F Espitalier
- Université de Toulouse, Mines Albi, UMR CNRS 5302, Centre RAPSODEE, Campus Jarlard, Albi cedex 09 F-81013, France
| | - J-J Letourneau
- Université de Toulouse, Mines Albi, UMR CNRS 5302, Centre RAPSODEE, Campus Jarlard, Albi cedex 09 F-81013, France
| | - A Rouilly
- Université de Toulouse, INP-ENSIACET, LCA, Toulouse 310130, France; INRA, UMR 1010 CAI, Toulouse 310130, France
| | - E Rodier
- Université de Toulouse, Mines Albi, UMR CNRS 5302, Centre RAPSODEE, Campus Jarlard, Albi cedex 09 F-81013, France
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Smith RR, Williams DR, Burnett DJ, Heng JYY. A new method to determine dispersive surface energy site distributions by inverse gas chromatography. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:8029-8035. [PMID: 24946213 DOI: 10.1021/la500688d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A computational model to predict the relative energy site contributions of a heterogeneous material from data collected by finite dilution-inverse gas chromatography (FD-IGC) is presented in this work. The methodology employed a multisolvent system site filling model utilizing Boltzmann statistics, expanding on previous efforts to calculate "experienced energies" at varying coverage, yielding a retention volume distribution allowing calculation of a surface free energy distribution. Surface free energy distributions were experimentally measured for racemic ibuprofen and β-mannitol powders, the energies of each were found in the ranges 43-52 and 40-55 mJ/m(2), respectively, over a surface coverage range of 0-8%. The computed contributions to surface energy values were found to match closely with data collected on macroscopic crystals by alternative techniques (±<1.5 mJ/m(2)).
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Affiliation(s)
- Robert R Smith
- Surfaces and Particle Engineering Laboratory, Department of Chemical Engineering, Imperial College London , South Kensington Campus, London SW7 2AZ, U.K
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Olusanmi D, Jayawickrama D, Bu D, McGeorge G, Sailes H, Kelleher J, Gamble JF, Shah UV, Tobyn M. A control strategy for bioavailability enhancement by size reduction: Effect of micronization conditions on the bulk, surface and blending characteristics of an active pharmaceutical ingredient. POWDER TECHNOL 2014. [DOI: 10.1016/j.powtec.2014.03.032] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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44
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Arsalan N, Palayangoda SS, Burnett DJ, Buiting JJ, Nguyen QP. Surface energy characterization of carbonate rocks. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.06.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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45
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Han X, Jallo L, To D, Ghoroi C, Davé R. Passivation of High-Surface-Energy Sites of Milled Ibuprofen Crystals via Dry Coating for Reduced Cohesion and Improved Flowability. J Pharm Sci 2013; 102:2282-96. [DOI: 10.1002/jps.23589] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Revised: 04/10/2013] [Accepted: 04/16/2013] [Indexed: 11/11/2022]
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46
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Stank K, Steckel H. Physico-chemical characterisation of surface modified particles for inhalation. Int J Pharm 2013; 448:9-18. [DOI: 10.1016/j.ijpharm.2013.03.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Revised: 03/06/2013] [Accepted: 03/10/2013] [Indexed: 11/29/2022]
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47
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The accurate measurement of second virial coefficients using self-interaction chromatography: experimental considerations. Eur J Pharm Biopharm 2013; 85:1103-11. [PMID: 23623796 DOI: 10.1016/j.ejpb.2013.04.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2012] [Revised: 01/12/2013] [Accepted: 04/08/2013] [Indexed: 11/20/2022]
Abstract
Measurement of B22, the second virial coefficient, is an important technique for describing the solution behaviour of proteins, especially as it relates to precipitation, aggregation and crystallisation phenomena. This paper describes the best practise for calculating B22 values from self-interaction chromatograms (SIC) for aqueous protein solutions. Detailed analysis of SIC peak shapes for lysozyme shows that non-Gaussian peaks are commonly encountered for SIC, with typical peak asymmetries of 10%. This asymmetry reflects a non-linear chromatographic retention process, in this case heterogeneity of the protein-protein interactions. Therefore, it is important to use the centre of mass calculations for determining accurate retention volumes and thus B22 values. Empirical peak maximum chromatogram analysis, often reported in the literature, can result in errors of up to 50% in B22 values. A methodology is reported here for determining both the mean and the variance in B22 from SIC experiments, includes a correction for normal longitudinal peak broadening. The variance in B22 due to chemical effects is quantified statistically and is a measure of the heterogeneity of protein-protein interactions in solution. In the case of lysozyme, a wide range of B22 values are measured which can vary significantly from the average B22 values.
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Davies MJ, Kerry TD, Seton L, Murphy MF, Gibbons P, Khoo J, Naderi M. The crystal engineering of salbutamol sulphate via simulated pulmonary surfactant monolayers. Int J Pharm 2013; 446:34-45. [DOI: 10.1016/j.ijpharm.2013.01.044] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 01/18/2013] [Accepted: 01/21/2013] [Indexed: 11/25/2022]
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49
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Das SC, Behara SRB, Bulitta JB, Morton DAV, Larson I, Stewart PJ. Powder Strength Distributions for Understanding De-agglomeration of Lactose Powders. Pharm Res 2012; 29:2926-35. [DOI: 10.1007/s11095-012-0799-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Accepted: 05/31/2012] [Indexed: 10/28/2022]
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50
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Das SC, Stewart PJ. Characterising surface energy of pharmaceutical powders by inverse gas chromatography at finite dilution. J Pharm Pharmacol 2012; 64:1337-48. [DOI: 10.1111/j.2042-7158.2012.01533.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Abstract
Objectives
The objectives of this project were the use of surface energy distributions in: distinguishing the effects of magnesium stearate on the surface energy of lactose processed by two methods: mixing in a Turbula and mechanofusion; characterising surface energy of materials before and after micronisation; and understanding surface energy changes of micronised lactose before and after storage at high relative humidity (RH).
Methods
Heptane, octane and nonane were used to determine nonpolar surface energy, and dichloromethane and ethyl acetate were used to determine polar surface energy in inverse gas chromatography at finite dilution.
Key findings
The total surface energy of lactose decreased more after mechanofusion with magnesium stearate than mixing in Turbula. The nonpolar surface energy of indometacin increased while polar and total surface energies decreased after micronisation. The nonpolar, polar and total surface energies and work of cohesion of micronised lactose decreased after storage at 75%RH for three months.
Conclusions
The surface energy distributions determined at finite dilution successfully distinguished and revealed more information than infinite dilution on surface energy changes in materials undergoing different pharmaceutical processes such as mixing, mechanofusion, micronisation and storage at high RH.
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Affiliation(s)
- Shyamal C Das
- Faculty of Pharmacy and Pharmaceutical Sciences, Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
| | - Peter J Stewart
- Faculty of Pharmacy and Pharmaceutical Sciences, Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
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