Clay minerals for nanocomposites and biotechnology: surface modification, dynamics and responses to stimuli
Clay minerals for nanocomposites and biotechnology: surface modification, dynamics and responses to stimuli
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DOI：
10.1180/claymin.2012.047.2.05
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发表时间：
2012-06-01
期刊：
影响因子：
1.5
通讯作者：
Heinz, H.
中科院分区：
文献类型：
--
作者：
Heinz, H.
粘土矿物在复合材料、涂料、钻井液、化妆品和医药中有着广泛的应用。本文综述了天然粘土矿物和有机改性粘土矿物的化学和物理性质，以了解其纳米级结构、表面特征及其在功能材料中的应用。强调了基本性能与材料设计的关系，并举例说明。讨论内容包括：概述；表面结构和阳离子密度；表面修饰的溶解度和溶解度逆转；原子电荷代表的共价键和离子键的程度；金属取代位的分布；纳米级界面性质的测量和模拟；烷基铵表面活性剂在粘土矿物表面的自组装、堆积密度和取向；表面活性剂在有机夹层空间中的密度和链构象；聚合物基质中的剥离自由能和通过调节解理能进行的改性；表面活性剂在矿物表面的热转变、扩散和光学响应；粘土层的弹性模数和弯曲稳定性；以及水溶液中多肽在粘土矿物表面的吸附机理。描述了在生物技术和其他未来用途中的潜在应用。
Clay minerals find a wide range of application in composites, paints, drilling liquids, cosmetics, and medicine. This article reviews chemical and physical properties of natural and organically modified clay minerals to understand the nanometre-scale structure, surface characteristics, and application in functional materials. The relation between fundamental properties and materials design is emphasized and illustrated by examples. The discussion comprises the following: an overview; surface structure and cation density; solubility and solubility reversal by surface modification; the degree of covalent and ionic bonding represented by atomic charges; the distribution of metal substitution sites; measurements and simulations of interfacial properties at the nanometre scale; self-assembly, packing density, and orientation of alkylammonium surfactants on the clay mineral surface; the density and chain conformation of surfactants in organic interlayer spaces; the free energy of exfoliation in polymer matrices and modifications by tuning the cleavage energy; thermal transitions, diffusion, and optical responses of surfactants on the mineral surface; elastic moduli and bending stability of clay layers; and the adsorption mechanism of peptides onto clay mineral surfaces in aqueous solution. Potential applications in biotechnology and other future uses are described.