Guzmán Eduardo, Maestro Armando, Llamas Sara, Álvarez-Rodríguez Jesús, Ortega Francisco, Maroto-Valiente Ángel, Rubio Ramón G
Departamento de Química Física I-Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain.
Department of Physics - Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, CB3 0HE Cambridge, United Kingdom.
Beilstein J Nanotechnol. 2016 Feb 5;7:197-208. doi: 10.3762/bjnano.7.18. eCollection 2016.
This work addresses the formation and the internal morphology of polyelectrolyte layers obtained by the layer-by-layer method. A multimodal characterization showed the absence of stratification of the films formed by the alternate deposition of poly(diallyldimethylammonium chloride) and poly(sodium 4-styrenesulfonate). Indeed the final organization might be regarded as three-dimensional solid-supported inter-polyelectrolyte films. The growth mechanism of the multilayers, followed using a quartz crystal microbalance, evidences two different growth trends, which show a dependency on the ionic strength due to its influence onto the polymer conformation. The hydration state does not modify the multilayer growth, but it contributes to the total adsorbed mass of the film. The water associated with the polyelectrolyte films leads to their swelling and plastification. The use of X-ray photoelectron spectroscopy has allowed for deeper insights on the internal structure and composition of the polyelectrolyte multilayers.
这项工作研究了通过层层组装法获得的聚电解质层的形成及其内部形态。多模态表征表明，由聚（二烯丙基二甲基氯化铵）和聚（4-苯乙烯磺酸钠）交替沉积形成的薄膜不存在分层现象。实际上，最终的结构可被视为三维固体支撑的聚电解质间薄膜。使用石英晶体微天平跟踪多层膜的生长机制，发现了两种不同的生长趋势，这两种趋势显示出对离子强度的依赖性，因为离子强度会影响聚合物的构象。水合状态不会改变多层膜的生长，但会影响膜的总吸附质量。与聚电解质膜结合的水会导致其膨胀和增塑。X射线光电子能谱的使用使人们能够更深入地了解聚电解质多层膜的内部结构和组成。
