Two-Dimensional Physical Networks of Lipopolymers at the Air/Water Interface: Correlation of Molecular Structure and Surface Rheological Behavior
Two-Dimensional Physical Networks of Lipopolymers at the Air/Water Interface: Correlation of Molecular Structure and Surface Rheological Behavior
复制标题
空气/水界面处脂质聚合物的二维物理网络：分子结构与表面流变行为的相关性
作者：
C. Naumann;C. F. Brooks;G. Fuller;T. Lehmann;J. Rühe;W. Knoll;P. Kuhn;O. Nuyken;C. Frank
最近对空气-水界面处的单层PEG脂聚合物和磷脂/PEG脂聚合物混合物进行的表面流变学和膜平衡实验揭示了一类新的准二维物理网络。形成网络需要两种不同类型的缔合相互作用：脂聚合物烷基链的微缩合形成小簇，以及水分子通过氢键介导相邻 PEG 簇之间的相互作用。在此介绍的实验中，我们有兴趣了解物理凝胶化是否是 PEG 特异性的，或者是否是空气-水界面处脂聚合物的更普遍特征。为了解决这个主题，我们将表面流变学和膜平衡实验扩展到聚（恶唑啉）脂聚合物。我们的实验表明，如果聚（恶唑啉）脂聚合物由双十八烷基甘油锚组成，则会发生流变转变。这表明脂聚合物之间的物理凝胶化不是 PEG-...
Recent surface rheology and film balance experiments on monolayers of PEG lipopolymers and phospholipid/PEG lipopolymer mixtures at the air−water interface have revealed a new class of quasi two-dimensional physical networks. Two different kinds of associative interactions are necessary to form the network: microcondensation of alkyl chains of lipopolymers to form small clusters and water molecule mediation of the interaction between adjacent PEG clusters via hydrogen bonding. In the experiments presented here, we are interested to learn whether the physical gelation is PEG specific or whether it is a more general characteristic of lipopolymers at the air−water interface. To address this topic, we have expanded our surface rheology and film balance experiments to poly(oxazoline) lipopolymers. Our experiments indicate the occurrence of a rheological transition if the poly(oxazoline) lipopolymers consist of a dioctadecylglycerol anchor. This shows that the physical gelation among lipopolymers is not a PEG-...