Mihara Hiroaki, Ishiguro Takashi, Fukano Hidenori, Taniuchi Shigeyuki, Ogino Keizo
Miyoshi Oil & Fat Co., Ltd., Katsushika-ku, Tokyo, Japan.
J Oleo Sci. 2007;56(5):223-30. doi: 10.5650/jos.56.223.
Triacylglycerin in Palm Oil contains POP (1,3-dipalmitoyl-2-oleoyl-glycerol) at 30%, POO (1,2-dioleoyl-3-palmitoyl-glycerol) at 20% and PPP (tripalmitoylglycerol) at 5%. The crystallization temperature of PPP is high and the rates of crystal nuclear formation and growth are fast. It is thus considered that PPP may have some effect on the manner or mode of Palm Oil. Examination was thus made to clarify how PPP may affect the crystallization of POP and POO by differential scanning calorimetry (DSC) and X ray diffractometry (XRD) conducted on PPP/POP and PPP/POO mixtures. High and low temperature peaks were noted to appear on the DSC crystallization curve for either of these mixtures. The high temperature peak was considered possibly due to PPP, and the low temperature peak, to POP or POO. DSC isothermal analysis indicated the rate of crystal growth of either mixture to exceed that of pure of POP or POO. Crystal mixture structure was also seen to be complicated than either compound in pure form. The present findings thus clearly indicate that clarification should be made of the effects of high melting point triacylglycerin, such as PPP, on the crystallization of Palm Oil.
棕榈油中的三酰甘油含有30%的POP（1,3 - 二棕榈酰 - 2 - 油酰甘油）、20%的POO（1,2 - 二油酰 - 3 - 棕榈酰甘油）和5%的PPP（三棕榈酰甘油）。PPP的结晶温度较高，晶核形成和生长速率较快。因此认为PPP可能对棕榈油的形态或方式有一定影响。于是通过对PPP/POP和PPP/POO混合物进行差示扫描量热法（DSC）和X射线衍射法（XRD），研究了PPP如何影响POP和POO的结晶。发现这些混合物中任何一种的DSC结晶曲线上都出现了高温峰和低温峰。高温峰可能归因于PPP，低温峰归因于POP或POO。DSC等温分析表明，这两种混合物中任何一种的晶体生长速率都超过了纯POP或POO。还发现晶体混合物结构比任何一种纯化合物的结构都复杂。因此，目前的研究结果清楚地表明，应阐明高熔点三酰甘油（如PPP）对棕榈油结晶的影响。
