Phase Behavior of Binary Mixture System of Unsaturated Fatty Acids

不饱和脂肪酸二元混合物体系的相行为

• 批准号: 06660168
• 负责人: HIRAMATSU Nobuyasu
• 金额: $ 0.83万
• 依托单位: Fukuoka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06660168/
• 关键词: Unsaturated fatty acid; Mixture; Crystal modification; Pressure; Phase behavior; Ultra-pure; 脂肪酸; 不飽和; 多形

The phase behavior of oleic acid (OA ; cis-9 octadecenoic acid) /palmitoleic acid (POA ; cis-9-hexadecenoic acid) mixture under pressure was examined by using high pressure differential thermal analysis technique up to 200 MPa. The components in this mixture have the same DELTA chain (chain segment between double bond and carboxyl group) length, while the omega chain (aliphatic chain segment between double bond and methylene end group) length differs by 2 carbons. The temperature of solid-liquid phase boundary shift drastically toward high temperature as the pressure increases. On the other hand, the shape of the phase boundary remained almost unchanged regardless of the pressure.The mixture of POA/asclepic acid (APA ; cis-11-octadecenoic acid) is also examined. Although the miscibility of POA/APA is quite different from OA/POA,the pressure response of these mixtures are almost the same. That means that the characteristic features in solid phase of these mixtures are retained even under elevated pressure, at least up to 200 MPa.The volume change on the melting of molecular complex formed in the OA/POA mixture was calculated by the pressure dependence of the melting point, enthalpy change of melting, and pelting point. The reasonable value was obtained. This might be helpful to discuss the structure of this molecular compound, because the structure is unknown right now.

用高压差热分析技术研究了油酸(OA；顺-9十八烯酸)/棕榈油酸(POA；顺-9-十六碳烯酸)混合物在200 Mpa压力下的相行为。这种混合物中的组分具有相同的Delta链(双键和羧基之间的链段)长度，而omega链(双键和亚甲基端基之间的脂肪链段)长度相差2个碳。随着压力的增加，固-液界面温度急剧向高温方向移动。另一方面，无论压力如何，相界面的形状几乎都保持不变。POA/Asclepic酸(APA；顺-11-十八碳烯酸)的混合物也被考察了。尽管POA/APA和OA/POA的相容性有很大不同，但它们的压力响应几乎是相同的。这意味着，即使在至少200兆帕的高压下，这些混合物的固相特征也保持不变。根据熔点、熔化热变和抛射点的压力关系，计算了OA/POA混合物中形成的分子络合物熔融时的体积变化。得出了合理的取值范围。这可能有助于讨论这种分子化合物的结构，因为目前结构尚不清楚。

项目成果

T.Inoue, I.Motoda, N.Hiramatsu, M.Suzuki, and K,Sato: "Pressure Effect on Phase Behavior of Binary Mixtures of cis-Unsaturated Fatty Acids" Chemistry and Physics of LIpids. (in press). (1996)

T.Inoue、I.Motoda、N.Hiramatsu、M.Suzuki 和 K,Sato：“压力对顺式不饱和脂肪酸二元混合物相行为的影响”脂质的化学和物理。

H.Kanaya,K.Hara,A.Nakamura,N.Hiramatsu,and K.Matsushige: "Investigation of Pressure and Temperature Effects on Gelation Process of Egg White BY Time-resolved Turbidimetric Measurements" Japanese Joumal of Applied Physics,Part 1. 33. 2817-2820 (1994)

H.Kanaya、K.Hara、A.Nakamura、N.Hiramatsu 和 K.Matsushige：“通过时间分辨比浊测量研究压力和温度对蛋白凝胶过程的影响”日本应用物理学杂志，第 1 部分。

T. Inoue et al.: "Phase Behavior of Binary Mixture of Palmitoleic Acid (cis-9-hexadecenoic acid) and Asclepic Acid (cis-11-octadecenoic acid)" Chemistry and Physics of Lipids. 66. 209-214 (1993)

T. Inoue 等人：“棕榈油酸（顺式 9-十六烯酸）和 Asclepic Acid（顺式 11-十八烯酸）二元混合物的相行为”脂质化学和物理。

T.Inoue, I.Motoda, N.Hiramatsu, M.Suzuki, and K.Sato: "Phase Behavior of Binary Mixture of Palmitoleic Acid (cis-9-hexadecenoic acid) and Asclepic Acid (cis-11-octadecenoic acid)" Chemistry and Physics of Lipids. 66. 209-214 (1993)

T.Inoue、I.Motoda、N.Hiramatsu、M.Suzuki 和 K.Sato：“棕榈油酸（顺式 9-十六烯酸）和 Asclepic 酸（顺式 11-十八烯酸）二元混合物的相行为”

H. Kanaya, K. Hara, A. Nakamura, and N. Hiramatsu: "Time Resolved Turbidimetric Studies of Pressure and Temperature Effects during Gelation Process of Egg-White" Reports on Progress in Polymer Physics in Japan. 38. 699-702 (1995)

H. Kanaya、K. Hara、A. Nakamura 和 N. Hiramatsu：“蛋清凝胶过程中压力和温度影响的时间分辨比浊研究”报告了日本高分子物理学的进展。