Lo Dico Giulia, Wicklein Bernd, Lisuzzo Lorenzo, Lazzara Giuseppe, Aranda Pilar, Ruiz-Hitzky Eduardo
Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), c/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain.
Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze pad 17, 90128 Palermo, Italy.
Beilstein J Nanotechnol. 2019 Jun 25;10:1303-1315. doi: 10.3762/bjnano.10.129. eCollection 2019.
Based on the unique ability of defibrillated sepiolite (SEP) to form stable and homogeneous colloidal dispersions of diverse types of nanoparticles in aqueous media under ultrasonication, multicomponent conductive nanoarchitectured materials integrating halloysite nanotubes (HNTs), graphene nanoplatelets (GNPs) and chitosan (CHI) have been developed. The resulting nanohybrid suspensions could be easily formed into films or foams, where each individual component plays a critical role in the biocomposite: HNTs act as nanocontainers for bioactive species, GNPs provide electrical conductivity (enhanced by doping with MWCNTs) and, the CHI polymer matrix introduces mechanical and membrane properties that are of key significance for the development of electrochemical devices. The resulting characteristics allow for a possible application of these active elements as integrated multicomponent materials for advanced electrochemical devices such as biosensors and enzymatic biofuel cells. This strategy can be regarded as an "a la carte" menu, where the selection of the nanocomponents exhibiting different properties will determine a functional set of predetermined utility with SEP maintaining stable colloidal dispersions of different nanoparticles and polymers in water.
基于去纤颤海泡石（SEP）在超声作用下能够在水性介质中形成各种类型纳米颗粒的稳定且均匀的胶体分散体这一独特能力，已开发出整合了埃洛石纳米管（HNTs）、石墨烯纳米片（GNPs）和壳聚糖（CHI）的多组分导电纳米结构材料。所得的纳米杂化悬浮液能够轻松制成薄膜或泡沫，其中每个单独的组分在生物复合材料中都起着关键作用：HNTs充当生物活性物质的纳米容器，GNPs提供导电性（通过用多壁碳纳米管掺杂得以增强），并且CHI聚合物基质引入了对电化学装置的开发具有关键意义的机械和膜性能。所得特性使得这些活性元素有可能作为用于高级电化学装置（如生物传感器和酶生物燃料电池）的集成多组分材料得到应用。这种策略可被视为一份“按单点菜”的菜单，其中选择具有不同特性的纳米组分将决定一组具有预定用途的功能组合，而SEP则在水中保持不同纳米颗粒和聚合物的稳定胶体分散体。
