Le Tirilly Sandrine, Tregouët Corentin, Bône Stéphane, Geffroy Cédric, Fuller Gerald, Pantoustier Nadège, Perrin Patrick, Monteux Cécile
École Supérieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI), ParisTech, PSL Research University, Sciences et Ingénierie de la Matière Molle (SIMM), CNRS UMR 7615, 10 rue Vauquelin, F-75231 Paris cedex 05, France.
Sorbonne-Universités, UPMC Univ Paris 06, SIMM, 10 rue Vauquelin, F-75231 Paris cedex 05, France.
ACS Macro Lett. 2015 Jan 20;4(1):25-29. doi: 10.1021/mz5005772. Epub 2014 Dec 11.
We probe the mechanical shear and compression properties of hydrogen-bonded polymer multilayers directly assembled at the oil-water interface using interfacial rheology techniques. We show that the polymer multilayers behave mechanically like a transient network, with elastic moduli that can be varied over 2 orders of magnitude by controlling the type and strength of physical interactions involved in the multilayers, which are controlled by the pH and the hydrophobicity of the polymer. Indeed, the interplay of hydrogen and hydrophobic interactions enables one to obtain a tighter and stronger network at the interface. Moreover, we show how a simple LBL process applied directly on emulsion droplets leads to encapsulation of a model oil, dodecane, as well as perfume molecules.
我们使用界面流变学技术探究了直接在油水界面组装的氢键聚合物多层膜的机械剪切和压缩性能。我们发现，聚合物多层膜在机械性能上表现得像一个瞬态网络，其弹性模量可通过控制多层膜中物理相互作用的类型和强度在两个数量级范围内变化，而这些相互作用由聚合物的pH值和疏水性控制。实际上，氢键和疏水相互作用的相互作用使人们能够在界面处获得更紧密、更强的网络。此外，我们展示了直接应用于乳液滴的简单层层组装过程如何导致模型油十二烷以及香料分子的包封。
