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Karde V, Khala MJ, Hare C, Heng JY. Use of shear sensitive coloured guest component to track powder mixing in adhesive binary mixtures. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.118068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Brokešová J, Niederquell A, Kuentz M, Zámostný P, Vraníková B, Šklubalová Z. Powder cohesion and energy to break an avalanche: Can we address surface heterogeneity? Int J Pharm 2022; 626:122198. [PMID: 36115463 DOI: 10.1016/j.ijpharm.2022.122198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 09/05/2022] [Accepted: 09/09/2022] [Indexed: 11/16/2022]
Affiliation(s)
- Jana Brokešová
- Charles University, Faculty of Pharmacy, Department of Pharmaceutical Technology, Akademika Heyrovského, 1203/8, 500 05 Hradec Králové, Czech Republic
| | - Andreas Niederquell
- Charles University, Faculty of Pharmacy, Department of Pharmaceutical Technology, Akademika Heyrovského, 1203/8, 500 05 Hradec Králové, Czech Republic; University of Applied Sciences and Arts Northwestern Switzerland, Institute of Pharma Technology, Hofackerstrasse, 30, CH-4132 Muttenz, Switzerland
| | - Martin Kuentz
- University of Applied Sciences and Arts Northwestern Switzerland, Institute of Pharma Technology, Hofackerstrasse, 30, CH-4132 Muttenz, Switzerland
| | - Petr Zámostný
- UCT Prague, Faculty of Chemical Technology, Department of Organic Technology, Technická, 5, 166 28, Prague 6, Dejvice, Czech Republic
| | - Barbora Vraníková
- Charles University, Faculty of Pharmacy, Department of Pharmaceutical Technology, Akademika Heyrovského, 1203/8, 500 05 Hradec Králové, Czech Republic
| | - Zdenka Šklubalová
- Charles University, Faculty of Pharmacy, Department of Pharmaceutical Technology, Akademika Heyrovského, 1203/8, 500 05 Hradec Králové, Czech Republic.
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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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Brokešová J, Slámová M, Zámostný P, Kuentz M, Koktan J, Krejčík L, Vraníková B, Svačinová P, Šklubalová Z. Mechanistic study of dissolution enhancement by interactive mixtures of chitosan with meloxicam as model. Eur J Pharm Sci 2021; 169:106087. [PMID: 34863871 DOI: 10.1016/j.ejps.2021.106087] [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: 08/03/2021] [Revised: 11/15/2021] [Accepted: 11/27/2021] [Indexed: 12/21/2022]
Abstract
To enhance dissolution rate of meloxicam (MX), a poorly soluble model drug, a natural polysaccharide excipient chitosan (CH) is employed in this work as a carrier to prepare binary interactive mixtures by either mixing or co-milling techniques. The MX-CH mixtures of three different drug loads were characterized for morphological, granulometric, and thermal properties as well as drug crystallinity. The relative dissolution rate of MX was determined in phosphate buffer of pH 6.8 using the USP-4 apparatus; a significant increase in MX dissolution rate was observed for both mixed and co-milled mixtures comparing to the raw drug. Higher dissolution rate of MX was evidently connected to surface activation by mixing or milling, which was pronounced by the higher specific surface energy as detected by inverse gas chromatography. In addition to the particle size reduction, the carrier effect of the CH was confirmed for co-milling by linear regression between the MX maximum relative dissolution rate and the total surface area of the mixture (R2 = 0.863). No MX amorphization or crystalline structure change were detected. The work of adhesion/cohesion ratio of 0.9 supports the existence of preferential adherence of MX to the coarse particles of CH to form stable interactive mixtures.
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Affiliation(s)
- Jana Brokešová
- Department of Pharmaceutical Technology, Charles University, Faculty of Pharmacy, Akademika Heyrovského 1203/8, Hradec Králové 500 05, Czech Republic
| | - Michaela Slámová
- Department of Organic Technology, UCT Prague, Faculty of Chemical Technology, Technická 5, Dejvice, Prague 6 166 28, Czech Republic
| | - Petr Zámostný
- Department of Organic Technology, UCT Prague, Faculty of Chemical Technology, Technická 5, Dejvice, Prague 6 166 28, Czech Republic
| | - Martin Kuentz
- University of Applied Sciences and Arts Northwestern Switzerland, Institute of Pharma Technology, Hofackerstrasse 30, Muttenz CH-4132, Switzerland
| | - Jakub Koktan
- Zentiva, K.S., U Kabelovny 130, Prague 10 102 37, Czech Republic
| | - Lukáš Krejčík
- Zentiva, K.S., U Kabelovny 130, Prague 10 102 37, Czech Republic
| | - Barbora Vraníková
- Department of Pharmaceutical Technology, Charles University, Faculty of Pharmacy, Akademika Heyrovského 1203/8, Hradec Králové 500 05, Czech Republic
| | - Petra Svačinová
- Department of Pharmaceutical Technology, Charles University, Faculty of Pharmacy, Akademika Heyrovského 1203/8, Hradec Králové 500 05, Czech Republic
| | - Zdenka Šklubalová
- Department of Pharmaceutical Technology, Charles University, Faculty of Pharmacy, Akademika Heyrovského 1203/8, Hradec Králové 500 05, Czech Republic.
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Hamieh T. New Methodology to Study the Dispersive Component of the Surface Energy and Acid-Base Properties of Silica Particles by Inverse Gas Chromatography at Infinite Dilution. J Chromatogr Sci 2021; 60:126-142. [PMID: 34096571 DOI: 10.1093/chromsci/bmab066] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Indexed: 11/14/2022]
Abstract
A new methodology was proposed to determine the dispersive component of the surface energy ${\gamma}_s^d$ of a solid taking into account the effect of the temperature on the surface area of n-alkanes, methylene group (${a}_{- CH2-}$) and polar molecules, thus defeating the method used by Dorris-Gray Schultz et al. We determined the correct ${\gamma}_s^d$ of the surface energy, the specific free energy, enthalpy and entropy of adsorption of polar molecules as well as the acid base constants of silica particles with an excellent accuracy. We confirmed the dependence of the dispersive component of the surface energy on the variations of the surface areas of organic molecules used in IGC technique at infinite dilution. The specific properties of interactions of silica particles were determined. The new proposed model took into account this thermal effect. Obtained results proved that the other used IGC methods gave inaccurate values of the specific parameters of silica surface, except for the vapor pressure method that led to excellent results of the specific free energy, enthalpy and entropy of adsorption, and the acid-base constants of the silica particles.
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Affiliation(s)
- Tayssir Hamieh
- SATIE, IFSTTAR, University Gustave Eiffel, Campus de Marne-La-Vallée, 25, allée des Marronniers, 78000 Versailles, France.,Laboratory of Materials, Catalysis, Environment and Analytical Methods (MCEMA) and LEADDER Laboratory, Faculty of Sciences and EDST, Lebanese University, Hariri Campus, Hadath, P.O. Box 6573/14, Beirut, Lebanon
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Salehi H, Karde V, Hajmohammadi H, Dissanayake S, Larsson SH, Heng JYY, Bradley M. Understanding flow properties of mannitol powder at a range of temperature and humidity. Int J Pharm 2021; 596:120244. [PMID: 33484920 DOI: 10.1016/j.ijpharm.2021.120244] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 12/28/2020] [Accepted: 12/29/2020] [Indexed: 11/18/2022]
Abstract
Inadequate flowability of powders in industries during handling can cause many problems. For example, lack of flow from hoppers, poor tablet weight consistency, and low production rate in tableting. Many factors are known to commonly affect flow properties of powders, such as temperature, humidity and conditioning duration. In this paper, flow properties of a mannitol powder, which was conditioned between 24 and 72 h at various high relative humidities and temperature, were measured using a shear tester. A statistical model was developed to investigate the relative importance of these variables on the mannitol flow properties. The developed model showed all independent variables are significant in estimating bulk cohesion. Two separate approaches were used to evaluate inter-particle forces in the bulk, and how these changed with environmental conditions. First, inter-particle forces were inferred from the measured bulk properties using the Rumpf model approach. Secondly, inter-particle forces were predicted based on a model of moisture present on the particle surface using a combination of Kelvin model with the Laplace-Young (KLY) equation. The second approach also involved a new method to measure surface energy of mannitol powder based on measurements using Finite Dilution Inverse Gas Chromatography (FD-IGC). The surface energies of the mannitol powder were measured at high temperature (35 °C) and at different range of relative humidities. In spite of the fundamentally different approaches to the two ways of inferring inter-particles forces, these forces came out within less than 1.5:1 in magnitude. The Rumpf approach from bulk behaviour data obviously reflected the measured change in behaviour with humidity in particular, but this was not predicted from the KLY approach, however the likely reasons for this are postulated and recommendations for improvement are made.
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Affiliation(s)
- Hamid Salehi
- Wolfson Centre for Bulk Solids Handling Technology, Faculty of Engineering & Science, University of Greenwich, Chatham, United Kingdom.
| | - Vikram Karde
- Department of Chemical Engineering, Imperial College London, London, United Kingdom
| | - Hajar Hajmohammadi
- Centre For Clinical Effectiveness and Health Data Sciences, Institute of Population Health Sciences, Queen Mary University of London, United Kingdom
| | - Susantha Dissanayake
- Wolfson Centre for Bulk Solids Handling Technology, Faculty of Engineering & Science, University of Greenwich, Chatham, United Kingdom
| | - Sylvia H Larsson
- Biomass Technology Centre, Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Jerry Y Y Heng
- Department of Chemical Engineering, Imperial College London, London, United Kingdom
| | - Mike Bradley
- Wolfson Centre for Bulk Solids Handling Technology, Faculty of Engineering & Science, University of Greenwich, Chatham, United Kingdom
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Hamieh T. Study of the temperature effect on the surface area of model organic molecules, the dispersive surface energy and the surface properties of solids by inverse gas chromatography. J Chromatogr A 2020; 1627:461372. [DOI: 10.1016/j.chroma.2020.461372] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 06/24/2020] [Accepted: 06/25/2020] [Indexed: 02/04/2023]
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