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http://hdl.handle.net/2445/207660
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DC Field | Value | Language |
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dc.contributor.author | Bayés-García, Laura | - |
dc.contributor.author | Fukao, Koji | - |
dc.contributor.author | Konishi, Takashi | - |
dc.contributor.author | Sato, Kiyotaka | - |
dc.contributor.author | Taguchi, Ken | - |
dc.date.accessioned | 2024-02-16T08:10:01Z | - |
dc.date.available | 2024-03-14T06:10:15Z | - |
dc.date.issued | 2023-03-15 | - |
dc.identifier.issn | 1528-7483 | - |
dc.identifier.uri | http://hdl.handle.net/2445/207660 | - |
dc.description.abstract | Fat-based soft materials generally contain different triacylglycerol (TAG) species; hence, TAG mixtures’ phase behaviors determine their important physical properties. TAG binary mixtures typically exhibit eutectic, monotectic, solid solution, and molecular compound (MC) forming phases; among them, the molecular interactions and the crystallization kinetics controlling the formation processes of MC-phases remain unexplored. We used thermal analysis, X-ray diffraction, and optical microscopy to examine the crystallization and transformation kinetics of the three MC-forming 1:1 binary TAG mixtures of 1,3-dipalmitoyl-2-oleoyl glycerol (POP)/1,3-dioleoyl-2-palmitoyl glycerol (OPO), POP/1,2-dipalmitoyl-2-oleoyl-rac-glycerol (rac-PPO), and POP/1,2- dipalmitoyl-3-oleoyl-sn-glycerol (sn-PPO). In the POP/OPO mixture, the MCPOP/OPO crystals of the most stable β form with double chain length stacking (β-2L) were crystallized by simple cooling treatments. In the POP/rac-PPO mixture, the β-2L form of MCPOP/rac‑PPO was crystallized by only cooling at 0.1 °C/min, while metastable β′-2L formed at the cooling rates of 0.5 °C/min and 2.0 °C/min; then β′-2L melted and partially transformed into the β form during the heating processes. The POP/sn-PPO mixture showed different and significantly intricate polymorphic behavior. First, a single component of sn-PPO crystallized in β′ with triple chain length stacking (β′-3L) during cooling. This was followed by the crystallization of POP and MCPOP/sn‑PPO of the β′-2L forms at slow cooling rates of 0.1 °C/min and 0.5 °C/min, and the α-2L forms at 2.0 °C/min. During heating, the metastable β′ or α forms melted, and MCPOP/sn‑PPO transformed into the β form before melting. Observations of isothermal crystal growth rates by optical microscopy revealed that sn PPO β-3L crystals grow faster than the other single TAGs or MCs, particularly above ∼18 °C. Differences in the crystallization kinetics between sn-PPO, POP, and MCPOP/sn‑PPO may cause the separate crystallization while the POP/sn-PPO mixture cools. | - |
dc.format.extent | 36 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | American Chemical Society | - |
dc.relation.isformatof | Versió postprint del document publicat a: https://doi.org/10.1021/acs.cgd.3c00038 | - |
dc.relation.ispartof | Crystal Growth & Design, 2023, vol. 23, num.4, p. 2870-2881 | - |
dc.relation.uri | https://doi.org/10.1021/acs.cgd.3c00038 | - |
dc.rights | (c) American Chemical Society, 2023 | - |
dc.source | Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada) | - |
dc.subject.classification | Cristal·lografia | - |
dc.subject.classification | Cristalls | - |
dc.subject.classification | Difracció de raigs X | - |
dc.subject.other | Crystallography | - |
dc.subject.other | Crystals | - |
dc.subject.other | X-rays diffraction | - |
dc.title | Crystallization and Transformation Behavior of Triacylglycerol Binary Mixtures Forming Molecular Compounds of POP/OPO, POP/rac-PPO, and POP/sn-PPO | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/acceptedVersion | - |
dc.identifier.idgrec | 742005 | - |
dc.date.updated | 2024-02-16T08:10:01Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada) |
Files in This Item:
File | Description | Size | Format | |
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840870.pdf | 3.06 MB | Adobe PDF | View/Open |
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