Synthesis of nanostructured nanoclay-zirconia multilayers: a feasibility study
Synthesis of nanostructured nanoclay-zirconia multilayers: a feasibility study
复制标题
DOI：
10.1155/2008/749508
复制
发表时间：
2008
影响因子：
--
通讯作者：
Haoyao Chen;Guoping Zhang;K. Richardson;Jian Luo
中科院分区：
文献类型：
--
作者：
Haoyao Chen;Guoping Zhang;K. Richardson;Jian Luo
本文首次报道了合成一类由纳米粘土和氧化物陶瓷交替层组成的新型无机纳米结构材料的努力。开发了一种新型的基于溶液的逐层（LBL）沉积技术来制备水合Zr阳离子和纳米粘土的多层膜。这种LBL沉积技术是通过将用于制造纳米粘土聚合物多层的静电介导的浸涂方法与用于制造纳米氧化物膜的连续离子层吸附和反应方法相结合而设计的。纳米结构粘土-氧化锆多层复合材料通过随后的退火形成。通过扫描电子显微镜、能量色散X射线光谱和X射线衍射表征证实，这些膜是均匀的和无裂纹的，由没有可检测的杂质组成，并且具有纳米尺度层状结构。纳米粘土的掺入有利于多层膜的静电介导组装，增强了结构完整性，并提供了一个通用的框架来构建功能梯度材料。设想了潜在的应用。
This paper reports the first effort to synthesize a new class of inorganic nanostructured materials consisting of alternating ultrathin layers of nanoclays and oxide ceramics. A novel solution-based layer-by-layer (LBL) deposition technique was developed to prepare multilayers of hydrated Zr cations and nanoclays. This LBL deposition technique is devised by integrating an electrostatic-mediated dip coating method for making nanoclay-polymer multilayers with a successive ionic layer adsorption and reaction method for making ultrathin oxide films. Nanostructured clay-zirconia multilayer composites formed through subsequent annealing. Characterization by scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction confirmed that these films are uniform and crack-free, consist of no detectable impurities, and possess nanoscale-layered structure. The incorporation of nanoclays facilitates the electrostatic-mediated assembling of multilayers, enhances the structural integrity, and provides a generic framework to construct functionally graded materials. Potential applications are envisaged.