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Crystallization-Induced Network Formation of Tri- and Monopalmitin at the Middle-Chain Triglyceride Oil/Air Interface.
Langmuir ( IF 3.7 ) Pub Date : 2020-06-10 , DOI: 10.1021/acs.langmuir.0c01195 Kim Mishra 1 , Jotam Bergfreund 1 , Pascal Bertsch 1 , Peter Fischer 1 , Erich J Windhab 1
Langmuir ( IF 3.7 ) Pub Date : 2020-06-10 , DOI: 10.1021/acs.langmuir.0c01195 Kim Mishra 1 , Jotam Bergfreund 1 , Pascal Bertsch 1 , Peter Fischer 1 , Erich J Windhab 1
Affiliation
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Crystalline glycerides play an important role in the formation of multiphase systems such as emulsions and foams. The stabilization of oil/water interfaces by glyceride crystals has been extensively studied compared to only few studies which have been dedicated to oil/air interfaces. This study investigates the crystallization and network formation of tripalmitin (TP) and monopalmitin (MP) at the middle-chain triglyceride (MCT) oil/air interface. TP crystals were found to crystallize in the bulk before aggregating as large rectangular crystal conglomerates at the MCT oil/air interface. This leads to the slow formation of a plastic deformable, macroscopic crystal layer with high interfacial rheological moduli. MP crystals form directly at the MCT oil/air interface resulting in a comparatively fast formation of an elastic deformable network. Crystals with tentacle-like morphology were found to be responsible for the network elasticity. In this work, we show how interfacial crystallization dynamics and mechanical strength can be linked to the molecular structure and crystallization behavior of glyceride crystals.
中文翻译：
在中链甘油三酸酯油/空气界面处的结晶诱导的三棕榈酸和单棕榈酸的网络形成。
结晶甘油酯在多相体系（如乳液和泡沫）的形成中起重要作用。与仅针对油/空气界面的一些研究相比，通过甘油酯晶体稳定油/水界面已得到了广泛的研究。这项研究调查了中链甘油三酸酯（MCT）油/空气界面的三棕榈精蛋白（TP）和单棕榈蛋白（MP）的结晶和网络形成。发现TP晶体在大块中结晶，然后在MCT油/空气界面聚集为大的矩形晶体聚集体。这导致具有高界面流变模量的可塑性变形的宏观晶体层的缓慢形成。MP晶体直接在MCT油/空气界面处形成，从而形成弹性可变形网络的速度相对较快。发现具有触手样形态的晶体负责网络弹性。在这项工作中，我们展示了界面结晶动力学和机械强度如何与甘油酯晶体的分子结构和结晶行为联系在一起。
更新日期：2020-07-07
中文翻译：
在中链甘油三酸酯油/空气界面处的结晶诱导的三棕榈酸和单棕榈酸的网络形成。
结晶甘油酯在多相体系（如乳液和泡沫）的形成中起重要作用。与仅针对油/空气界面的一些研究相比，通过甘油酯晶体稳定油/水界面已得到了广泛的研究。这项研究调查了中链甘油三酸酯（MCT）油/空气界面的三棕榈精蛋白（TP）和单棕榈蛋白（MP）的结晶和网络形成。发现TP晶体在大块中结晶，然后在MCT油/空气界面聚集为大的矩形晶体聚集体。这导致具有高界面流变模量的可塑性变形的宏观晶体层的缓慢形成。MP晶体直接在MCT油/空气界面处形成，从而形成弹性可变形网络的速度相对较快。发现具有触手样形态的晶体负责网络弹性。在这项工作中，我们展示了界面结晶动力学和机械强度如何与甘油酯晶体的分子结构和结晶行为联系在一起。
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