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Grinberg VY, Senin AA, Grinberg NV, Burova TV, Dubovik AS, Potekhin SA. Energetics of poloxamer micellization at normal and high pressures. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.01.060] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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2
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Horiuchi T, Sakai T, Sanada Y, Watanabe K, Aida M, Katsumoto Y. Association Behavior of Poly(ethylene oxide)-Poly(propylene oxide) Alternating Multiblock Copolymers in Water toward Thermally Induced Phase Separation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:14649-14656. [PMID: 29236506 DOI: 10.1021/acs.langmuir.7b02810] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Thermal changes in the association behavior of poly(ethylene oxide)-poly(propylene oxide) alternating multiblock (PEO-PPO AMB) copolymers in water are investigated by the use of transmittance and light scattering measurements. Two PEO-PPO AMB copolymers with a different weight fraction of PEO, (EO220PO33)8 and (EO68PO33)9, are prepared. The weight-average molecular weights of (EO220PO33)8 and (EO68PO33)9 estimated by static light scattering measurements are 1.3 × 105 and 4.1 × 104 g mol-1, respectively. The number of PEO-PPO repeating pairs is over 8. It is found that the aqueous solution of (EO220PO33)8 undergoes phase separation with a lower critical solution temperature (LCST) of around 58 °C at 0.3 wt %. For the aqueous (EO68PO33)9 solution, the LCST is estimated to be ca. 42 °C. The critical solution concentration for (EO68PO33)9 is not clear because of a small concentration dependence of Tc at a higher concentration range. Dynamic light scattering measurements indicate that a micellelike aggregate is formed below the LCST. From the Debye plot, it is elucidated that the second virial coefficient, A2, starts going down at around 32 °C for (EO220PO33)8 and below 15 °C for (EO68PO33)9. The A2 value of (EO220PO33)8 approaches 0 near 50 °C, whereas that of (EO68PO33)9 approaches 0 at around 35 °C. At a high temperature, the attractive interaction among the copolymers becomes dominant, thereby inducing the formation of micellelike aggregates.
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Affiliation(s)
- Tasuku Horiuchi
- Department of Chemistry, Graduate School of Science, Hiroshima University , Kagamiyama 1-3-1, Higashi-hiroshima 739-8526, Japan
| | - Takamasa Sakai
- Department of Bioengineering, Graduate School of Engineering, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Yusuke Sanada
- Department of Chemistry, Faculty of Science, Fukuoka University , Nanakuma 8-19-1, Jonan-ku, Fukuoka 814-0180, Japan
| | - Keisuke Watanabe
- Department of Chemistry, Faculty of Science, Fukuoka University , Nanakuma 8-19-1, Jonan-ku, Fukuoka 814-0180, Japan
| | - Misako Aida
- Department of Chemistry, Graduate School of Science, Hiroshima University , Kagamiyama 1-3-1, Higashi-hiroshima 739-8526, Japan
| | - Yukiteru Katsumoto
- Department of Chemistry, Faculty of Science, Fukuoka University , Nanakuma 8-19-1, Jonan-ku, Fukuoka 814-0180, Japan
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3
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Poloxamers as Drug-Delivery Systems: Physicochemical, Pharmaceutical, and Toxicological Aspects. Nanotoxicology 2014. [DOI: 10.1007/978-1-4614-8993-1_13] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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4
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Evans CM, Henderson KJ, Saathoff JD, Shull KR, Torkelson JM. Simultaneous Determination of Critical Micelle Temperature and Micelle Core Glass Transition Temperature of Block Copolymer–Solvent Systems via Pyrene-Label Fluorescence. Macromolecules 2013. [DOI: 10.1021/ma400686j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christopher M. Evans
- Department of Chemical and Biological Engineering and ‡Department of Materials Science
and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Kevin J. Henderson
- Department of Chemical and Biological Engineering and ‡Department of Materials Science
and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Jonathan D. Saathoff
- Department of Chemical and Biological Engineering and ‡Department of Materials Science
and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Kenneth R. Shull
- Department of Chemical and Biological Engineering and ‡Department of Materials Science
and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - John M. Torkelson
- Department of Chemical and Biological Engineering and ‡Department of Materials Science
and Engineering, Northwestern University, Evanston, Illinois 60208, United States
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D’Este M, Alini M, Eglin D. Single step synthesis and characterization of thermoresponsive hyaluronan hydrogels. Carbohydr Polym 2012; 90:1378-85. [DOI: 10.1016/j.carbpol.2012.07.007] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Revised: 06/21/2012] [Accepted: 07/02/2012] [Indexed: 01/31/2023]
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6
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Lin ZQ, Sun PJ, Tay YY, Liang J, Liu Y, Shi NE, Xie LH, Yi MD, Qian Y, Fan QL, Zhang H, Hng HH, Ma J, Zhang Q, Huang W. Kinetically controlled assembly of a spirocyclic aromatic hydrocarbon into polyhedral micro/nanocrystals. ACS NANO 2012; 6:5309-5319. [PMID: 22575153 DOI: 10.1021/nn3011398] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Nonplane molecules with multiple large aromatic planes could be promising candidates to form various polyhedral micro/nanocrystals by manipulating the different π···π stacking, tuning the cohesive energies of crystal facets, and controlling the kinetic growth process. Spirocyclic aromatic hydrocarbons (SAHs) not only have two cross-shaped aromatic planes but also offer the feature of supramolecular steric hindrance, making it favorable for the heterogeneous kinetic growth into highly symmetric polyhedra. Herein, we report that a novel SAH compound, spiro[fluorene-9,7'-dibenzo[c,h]acridine]-5'-one (SFDBAO), can self-assemble into various monodispersed shapes such as hexahedra, octahedra, and decahedra through the variation of either different types of surfactants, such as Pluronic 123 (P123) and cetyltrimethyl ammonium bromide (CTAB), or growth parameters. In addition, the possible mechanism of crystal facet growth has been proposed according to the SEM, XRD, TEM, and SAED characterization of organic polyhedral micro/nanocrystals. The unique cruciform-shaped SAHs have been demonstrated as fascinating supramolecular synthons for various highly symmetric polyhedral assembling.
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Affiliation(s)
- Zong-Qiong Lin
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210046, People's Republic of China
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Dulong V, Mocanu G, Picton L, Le Cerf D. Amphiphilic and thermosensitive copolymers based on pullulan and Jeffamine®: Synthesis, characterization and physicochemical properties. Carbohydr Polym 2012. [DOI: 10.1016/j.carbpol.2011.09.049] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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8
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Karakasyan C, Lack S, Brunel F, Maingault P, Hourdet D. Synthesis and Rheological Properties of Responsive Thickeners Based on Polysaccharide Architectures. Biomacromolecules 2008; 9:2419-29. [DOI: 10.1021/bm800393s] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- C. Karakasyan
- Physico-Chimie des Polymères et des Milieux Dispersés, UMR 7615, UPMC-CNRS-ESPCI, 10 rue Vauquelin, 75005 Paris, France, and Laboratoires Brothier, Z.A. B.P. 26, 49590 Fontevraud L’Abbaye, France
| | - S. Lack
- Physico-Chimie des Polymères et des Milieux Dispersés, UMR 7615, UPMC-CNRS-ESPCI, 10 rue Vauquelin, 75005 Paris, France, and Laboratoires Brothier, Z.A. B.P. 26, 49590 Fontevraud L’Abbaye, France
| | - F. Brunel
- Physico-Chimie des Polymères et des Milieux Dispersés, UMR 7615, UPMC-CNRS-ESPCI, 10 rue Vauquelin, 75005 Paris, France, and Laboratoires Brothier, Z.A. B.P. 26, 49590 Fontevraud L’Abbaye, France
| | - P. Maingault
- Physico-Chimie des Polymères et des Milieux Dispersés, UMR 7615, UPMC-CNRS-ESPCI, 10 rue Vauquelin, 75005 Paris, France, and Laboratoires Brothier, Z.A. B.P. 26, 49590 Fontevraud L’Abbaye, France
| | - D. Hourdet
- Physico-Chimie des Polymères et des Milieux Dispersés, UMR 7615, UPMC-CNRS-ESPCI, 10 rue Vauquelin, 75005 Paris, France, and Laboratoires Brothier, Z.A. B.P. 26, 49590 Fontevraud L’Abbaye, France
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9
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Ding Y, Ye X, Zhang G. Microcalorimetric Investigation on Aggregation and Dissolution of Poly(N-isopropylacrylamide) Chains in Water. Macromolecules 2005. [DOI: 10.1021/ma048460q] [Citation(s) in RCA: 147] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yanwei Ding
- Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, Structure Research Laboratory, University of Science and Technology of China, Hefei, Anhui, China
| | - Xiaodong Ye
- Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, Structure Research Laboratory, University of Science and Technology of China, Hefei, Anhui, China
| | - Guangzhao Zhang
- Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, Structure Research Laboratory, University of Science and Technology of China, Hefei, Anhui, China
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Bromberg L, Temchenko M, Moeser GD, Hatton TA. Thermodynamics of temperature-sensitive polyether-modified poly(acrylic acid) microgels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:5683-92. [PMID: 16459580 DOI: 10.1021/la0359530] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The temperature-induced structural changes and thermodynamics of ionic microgels based on poly(acrylic acid) (PAA) networks bonded with poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) (PEO-PPO-PEO) (Pluronic) copolymers have been studied by small-angle neutron scattering (SANS), ultra-small-angle neutron scattering (USANS), differential scanning calorimetry (DSC), and equilibrium swelling techniques. Aggregation within microgels based on PAA and either the hydrophobic Pluronic L92 (average composition, EO8PO52EO8; PPO content, 80%) or the hydrophilic Pluronic F127 (average composition, EO99PO67EO99; PPO content, 30%) was studied and compared to that in the solutions of the parent Pluronic. The neutron scattering results indicate the formation of micelle-like aggregates within the F127-based microgel particles, while the L92-based microgels formed fractal structures of dense nanoparticles. The microgels exhibit thermodynamically favorable volume phase transitions within certain temperature ranges due to reversible aggregation of the PPO chains, which occurs because of hydrophobic associations. The values of the apparent standard enthalpy of aggregation in the microgel suspensions indicate aggregation of hydrophobic clusters that are more hydrophobic than the un-cross-linked PPO chains in the Pluronic. Differences in the PPO content in Pluronics L92 and F127 result in a higher hydrophobicity of the resulting L92-PAA-EGDMAmicrogels and a larger presence of hydrophobic, densely cross-linked clusters that aggregate into supramolecular structures rather than micelle-like aggregates such as those formed in the F127-PAA-EGDMA microgels.
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Affiliation(s)
- Lev Bromberg
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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11
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Taboada P, Castro E, Mosquera V. Thermodynamic Properties of Diblock Copolymers of Ethylene Oxide and Styrene Oxide in Aqueous Solution. J Phys Chem B 2004. [DOI: 10.1021/jp037180u] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pablo Taboada
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, Spain
| | - Emilio Castro
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, Spain
| | - Víctor Mosquera
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Santiago de Compostela, Spain
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12
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Senkow S, Mehta SK, Douhéret G, Roux AH, Roux-Desgranges G. Aqueous solutions of some amphiphilic poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide) triblock copolymers. A thermodynamic study over a wide concentration range at temperatures between 288.15 and 328.15 K. Phys Chem Chem Phys 2002. [DOI: 10.1039/b204404h] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Castile JD, Taylor KM, Buckton G. The influence of incubation temperature and surfactant concentration on the interaction between dimyristoylphosphatidylcholine liposomes and poloxamer surfactants. Int J Pharm 2001; 221:197-209. [PMID: 11397581 DOI: 10.1016/s0378-5173(01)00685-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Differential scanning calorimetry and photon correlation spectroscopy have been used to study the interaction between poloxamers P338 and P407 and dimyristoylphosphatidylcholine (DMPC) liposomes. The extent of the interaction was found to be dependent on the incubation temperature in addition to the poloxamer concentration. At low poloxamer concentrations (0.1-1.0% w/v) an interaction with the phospholipid bilayer was detected by a reduction of the pre-transition enthalpy of DMPC. At higher concentrations (2.0-5.0% w/v), the main phase transition temperature of the liposomes decreased and the endotherm broadened with a shoulder on the high temperature side, indicative of phase separation. Maximum increases in the diameter of small freeze-thaw extruded liposomes were shown to occur at temperatures close to the poloxamer critical micelle temperatures. At higher temperatures and surfactant concentrations there was evidence of solubilization of phospholipid into mixed micelles.
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Affiliation(s)
- J D Castile
- Centre for Materials Science, Department of Pharmaceutics, School of Pharmacy, University of London, 29-39 Brunswick Square, London, WC1N 1AX, UK
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14
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Buckton G, Machiste EO. Differences between dynamic and equilibrium surface tension of poly(oxyethylene)-poly(oxypropylene)-poly(oxyethylene) block copolymer surfactants (poloxamers P407, P237, and P338) in aqueous solution. J Pharm Sci 1997; 86:163-6. [PMID: 9040089 DOI: 10.1021/js960343o] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Poloxamer surfactants are macromolecules with complex interfacial behavior. Although a number of studies of equilibrium surface tension have been published recently, there is little information on the diffusion of these large molecules to the air-liquid interface. Because most surfactants are used in dynamic systems, the diffusion to the surface can be critical in controlling performance. In this study a maximum bubble pressure method was used to study dynamic surface tension (DST) of Poloxamer P407, P237, and P338, at a range of bubble rates (surface age) and concentrations, at either 25 or 35 degrees C. The DST did not change at the critical micelle concentration and also did not vary in the same manner as the equilibrium surface tension (EST) with respect to temperature. It was concluded that DST behavior of the surfactants was most closely related to the poly(oxyethylene) content and/or total molecular weight of the surfactants, whereas the micellization and hence the EST were more closely related to the poly(oxypropylene) content.
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Affiliation(s)
- G Buckton
- Centre for Materials Science, School of Pharmacy, University of London, U.K
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15
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Armstrong J, Chowdhry B, Mitchell J, Beezer A, Leharne S. Effect of Cosolvents and Cosolutes upon Aggregation Transitions in Aqueous Solutions of the Poloxamer F87 (Poloxamer P237): A High Sensitivity Differential Scanning Calorimetry Study. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp951390s] [Citation(s) in RCA: 121] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jonathan Armstrong
- School of Biological and Chemical Sciences, University of Greenwich, Wellington Street, Woolwich, London SE18 6PF, U.K., The Chemical Laboratory, The University, Canterbury, Kent CT2 7NH, U.K., and School of Environmental Sciences, University of Greenwich, Creek Road, Deptford, London SE8 3BW, U.K
| | - Babur Chowdhry
- School of Biological and Chemical Sciences, University of Greenwich, Wellington Street, Woolwich, London SE18 6PF, U.K., The Chemical Laboratory, The University, Canterbury, Kent CT2 7NH, U.K., and School of Environmental Sciences, University of Greenwich, Creek Road, Deptford, London SE8 3BW, U.K
| | - John Mitchell
- School of Biological and Chemical Sciences, University of Greenwich, Wellington Street, Woolwich, London SE18 6PF, U.K., The Chemical Laboratory, The University, Canterbury, Kent CT2 7NH, U.K., and School of Environmental Sciences, University of Greenwich, Creek Road, Deptford, London SE8 3BW, U.K
| | - Anthony Beezer
- School of Biological and Chemical Sciences, University of Greenwich, Wellington Street, Woolwich, London SE18 6PF, U.K., The Chemical Laboratory, The University, Canterbury, Kent CT2 7NH, U.K., and School of Environmental Sciences, University of Greenwich, Creek Road, Deptford, London SE8 3BW, U.K
| | - Stephen Leharne
- School of Biological and Chemical Sciences, University of Greenwich, Wellington Street, Woolwich, London SE18 6PF, U.K., The Chemical Laboratory, The University, Canterbury, Kent CT2 7NH, U.K., and School of Environmental Sciences, University of Greenwich, Creek Road, Deptford, London SE8 3BW, U.K
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Hecht E, Hoffmann H. Kinetic and calorimetric investigations on micelle formation of block copolymers of the poloxamer type. Colloids Surf A Physicochem Eng Asp 1995. [DOI: 10.1016/0927-7757(94)03044-z] [Citation(s) in RCA: 133] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Alexandridis P, Alan Hatton T. Poly(ethylene oxide)poly(propylene oxide)poly(ethylene oxide) block copolymer surfactants in aqueous solutions and at interfaces: thermodynamics, structure, dynamics, and modeling. Colloids Surf A Physicochem Eng Asp 1995. [DOI: 10.1016/0927-7757(94)03028-x] [Citation(s) in RCA: 1523] [Impact Index Per Article: 52.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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The controlled crystallisation of a model powder: 1. The effects of altering the stirring rate and the supersaturation profile, and the incorporation of a surfactant (poloxamer 188). Int J Pharm 1994. [DOI: 10.1016/0378-5173(94)90262-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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The use of high sensitivity differential scanning calorimetry to characterise dilute aqueous dispersions of surfactants: 2. Further studies on polyoxyethylene alkyl ethers. Int J Pharm 1994. [DOI: 10.1016/0378-5173(94)90156-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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