Fully conducting hydro-sponges with electro-swelling properties tuned by synthetic parameters
Fully conducting hydro-sponges with electro-swelling properties tuned by synthetic parameters
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DOI：
10.1016/j.electacta.2012.11.012
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发表时间：
2013-07-01
影响因子：
6.6
通讯作者：
Cordoba de Torresi, Susana I.
中科院分区：
文献类型：
--
作者：
Antonio, Jadielson L. S.;Lira, Luiz M.;Cordoba de Torresi, Susana I.
本工作详细介绍了由聚吡咯(PPy)制备的四种致密聚合物3D海绵的合成和电化学表征。在合成过程中，采用具有圆柱形几何形状的颗粒作为牺牲模板，促进聚吡咯在其表面的生长，形成管状结构。然后在静态条件下，通过将合成的聚吡咯微管组装成网络，获得了水化海绵。尽管这些水化海绵只由导电聚合物形成，但由于它们在去离子水和电解液中都能膨胀，所以它们在控释系统中表现出了良好的特性，类似于水凝胶的行为。由于这些水凝胶的3D结构，与电诱导的PPy体积变化相关的众所周知的人工肌肉特性在这些水凝胶中得到了增强，这导致了体积变化高达其初始尺寸的40%。四种聚吡咯海绵的形态对这两种行为都有很大的影响。我们的研究表明，海绵的形态和性能可以随着合成条件的变化而改变，这为制备在不同类型的控制释放装置和智能膜中具有潜在应用的材料打开了可能性。(C)2012爱思唯尔有限公司。保留所有权利。
The present work details the synthesis and electrochemical characterization of four types of compacted polymeric 3D hydro-sponges prepared only from polypyrrole (PPy). During the synthesis, particles with cylindrical geometry were used as sacrificial templates, which promoted the growth of polypyrrole on their surfaces to form tubular structures. Hydro-sponges were then obtained under static conditions through the assembly of synthesized PPy microtubules into networks. Although these hydro-sponges were formed only by a conducting polymer, they showed good characteristics for their application in controlled-release systems because of their ability to swell in both deionized water and in electrolytic solutions, similar to the behavior exhibited for hydrogels. The well-known artificial-muscle properties associated with an electrically induced volume change of PPy were enhanced in these hydrogels because of their 3D structure, which led to volumes changes of up to 40% of their initial size. Both behaviors were extremely affected by the morphology of the four obtained PPy hydro-sponges. Our study shows that the morphology and, consequently, the hydro-sponges properties can be tuned as a function of the conditions employed during synthesis, which opens the possibility of preparing materials with potential applications in different types of controlled-release devices and smart membranes. (C) 2012 Elsevier Ltd. All rights reserved.