Binary Phase Behavior of 1,3-Distearoyl-2-oleoyl-<i>sn</i>-glycerol (SOS) and Trilaurin (LLL)
This paper reports the precise analysis of the eutectic mixing behavior of 1,3-distearoyl-2-oleoyl-<i>sn</i>-glycerol (SOS) and trilaurin (LLL), as a typical model case of the mixture of cocoa butter (CB) and cocoa butter substitute (CBS). SOS was mixed with LLL at several mass fractions...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-11-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/25/22/5313 |
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| author | Shinichi Yoshikawa Shimpei Watanabe Yoshinori Yamamoto Fumitoshi Kaneko |
| author_facet | Shinichi Yoshikawa Shimpei Watanabe Yoshinori Yamamoto Fumitoshi Kaneko |
| author_sort | Shinichi Yoshikawa |
| collection | DOAJ |
| description | This paper reports the precise analysis of the eutectic mixing behavior of 1,3-distearoyl-2-oleoyl-<i>sn</i>-glycerol (SOS) and trilaurin (LLL), as a typical model case of the mixture of cocoa butter (CB) and cocoa butter substitute (CBS). SOS was mixed with LLL at several mass fractions of LLL (<i>w</i><sub>LLL</sub>); the mixtures obtained were analyzed for polymorphic phase behavior using differential scanning calorimetry (DSC) and synchrotron radiation X-ray diffractometry (SR-XRD). In melt crystallization with constant-rate cooling, SOS and LLL formed eutectics in their metastable polymorphs, allowing the occurrence of a compatible solid solution at <i>w</i><sub>LLL</sub> ≥ 0.925. With subsequent heating, the resultant crystals transformed toward more stable polymorphs, then melted in a eutectic manner. For mixtures aged at 25 °C after melt crystallization, eutectics were found in the extended <i>w</i><sub>LLL</sub> region, even at <i>w</i><sub>LLL</sub> = 0.975. These results indicate that phase separation between SOS and LLL progressed in their solid solution under stabilization. The crystal growth of the separated SOS fraction may cause fat-bloom formation in compound chocolate containing CB and CBS. To solve this problem, the development of retardation techniques against phase separation is expected. |
| first_indexed | 2024-03-10T14:51:14Z |
| format | Article |
| id | doaj.art-d5bca91eaab84827962481b564161088 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T14:51:14Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-d5bca91eaab84827962481b5641610882023-11-20T20:58:17ZengMDPI AGMolecules1420-30492020-11-012522531310.3390/molecules25225313Binary Phase Behavior of 1,3-Distearoyl-2-oleoyl-<i>sn</i>-glycerol (SOS) and Trilaurin (LLL)Shinichi Yoshikawa0Shimpei Watanabe1Yoshinori Yamamoto2Fumitoshi Kaneko3Research Institute for Creating the Future, Fuji Oil Holdings Inc., Izumisano 598-8540, JapanResearch Institute for Creating the Future, Fuji Oil Holdings Inc., Izumisano 598-8540, JapanGraduate School of Science, Osaka University, Toyonaka 560-0043, JapanGraduate School of Science, Osaka University, Toyonaka 560-0043, JapanThis paper reports the precise analysis of the eutectic mixing behavior of 1,3-distearoyl-2-oleoyl-<i>sn</i>-glycerol (SOS) and trilaurin (LLL), as a typical model case of the mixture of cocoa butter (CB) and cocoa butter substitute (CBS). SOS was mixed with LLL at several mass fractions of LLL (<i>w</i><sub>LLL</sub>); the mixtures obtained were analyzed for polymorphic phase behavior using differential scanning calorimetry (DSC) and synchrotron radiation X-ray diffractometry (SR-XRD). In melt crystallization with constant-rate cooling, SOS and LLL formed eutectics in their metastable polymorphs, allowing the occurrence of a compatible solid solution at <i>w</i><sub>LLL</sub> ≥ 0.925. With subsequent heating, the resultant crystals transformed toward more stable polymorphs, then melted in a eutectic manner. For mixtures aged at 25 °C after melt crystallization, eutectics were found in the extended <i>w</i><sub>LLL</sub> region, even at <i>w</i><sub>LLL</sub> = 0.975. These results indicate that phase separation between SOS and LLL progressed in their solid solution under stabilization. The crystal growth of the separated SOS fraction may cause fat-bloom formation in compound chocolate containing CB and CBS. To solve this problem, the development of retardation techniques against phase separation is expected.https://www.mdpi.com/1420-3049/25/22/53131,3-distearoyl-2-oleoyl-<i>sn</i>-glycerol (SOS)trilaurin (LLL)eutecticsolid solutionphase separationpolymorph |
| spellingShingle | Shinichi Yoshikawa Shimpei Watanabe Yoshinori Yamamoto Fumitoshi Kaneko Binary Phase Behavior of 1,3-Distearoyl-2-oleoyl-<i>sn</i>-glycerol (SOS) and Trilaurin (LLL) Molecules 1,3-distearoyl-2-oleoyl-<i>sn</i>-glycerol (SOS) trilaurin (LLL) eutectic solid solution phase separation polymorph |
| title | Binary Phase Behavior of 1,3-Distearoyl-2-oleoyl-<i>sn</i>-glycerol (SOS) and Trilaurin (LLL) |
| title_full | Binary Phase Behavior of 1,3-Distearoyl-2-oleoyl-<i>sn</i>-glycerol (SOS) and Trilaurin (LLL) |
| title_fullStr | Binary Phase Behavior of 1,3-Distearoyl-2-oleoyl-<i>sn</i>-glycerol (SOS) and Trilaurin (LLL) |
| title_full_unstemmed | Binary Phase Behavior of 1,3-Distearoyl-2-oleoyl-<i>sn</i>-glycerol (SOS) and Trilaurin (LLL) |
| title_short | Binary Phase Behavior of 1,3-Distearoyl-2-oleoyl-<i>sn</i>-glycerol (SOS) and Trilaurin (LLL) |
| title_sort | binary phase behavior of 1 3 distearoyl 2 oleoyl i sn i glycerol sos and trilaurin lll |
| topic | 1,3-distearoyl-2-oleoyl-<i>sn</i>-glycerol (SOS) trilaurin (LLL) eutectic solid solution phase separation polymorph |
| url | https://www.mdpi.com/1420-3049/25/22/5313 |
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