Matching Avrami indices achieves similar hardnesses in palm oil-based fats
Matching Avrami indices achieves similar hardnesses in palm oil-based fats
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DOI：
10.1021/jf034653l
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发表时间：
2004-03-24
影响因子：
6.1
通讯作者：
Marangoni, AG
中科院分区：
文献类型：
--
作者：
Singh, AP;Bertoli, C;Marangoni, AG
这项研究展示了化学交换氢化棕榈油(IHPO)和部分氢化棕榈油(PHPO)的结构如何具有相似的机械性能。IHPO在30℃下结晶24 h，得到的脂肪固体脂肪含量(SFC)为45%，屈服力为51.5 N，而在相同条件下结晶的PHPO，其SFC为50%，屈服力为44 N。这一结果与证监会的预期相反，因此表明脂肪的微观结构在决定机械性能方面起着关键作用。以Avrami指数为指导，通过匹配结晶行为，成功地匹配了显微组织和材料硬度。这些结果表明，结构形成的动力学是影响棕榈油基脂宏观力学性能的关键因素。
This study demonstrates how chemically interesterified hydrogenated palm oil (IHPO) and partially hydrogenated palm oil (PHPO) can be structured to have similar mechanical properties. Crystallization of IHPO at 30 degreesC for 24 h yielded a fat with a solid fat content (SFC) of 45% and a yield force of 51.5 N. On the other hand, PHPO had a SFC of 50% and a yield force of 44 N when crystallized under the same conditions. The result was opposite from what would be expected from the SFC point of view, thus suggesting that the microstructure of the fat plays a key role in determining mechanical properties. By matching crystallization behavior using the Avrami index as a guide, microstructures and material hardness were successfully matched. These results suggest that the dynamics of structure formation was a key factor influencing the macroscopic mechanical properties of palm oil-based fats.