From kinetic-structure analysis to engineering crystalline fiber networks in soft materials
From kinetic-structure analysis to engineering crystalline fiber networks in soft materials
复制标题
从动力学结构分析到软材料中的晶体纤维网络工程
DOI：
10.1039/c2cp43747c
复制
发表时间：
2013-01-01
影响因子：
3.3
通讯作者：
Liu, Xiang-Yang
中科院分区：
文献类型：
--
作者：
Wang, Rong-Yao;Wang, Peng;Liu, Xiang-Yang
了解动力学在纤维网络微结构形成中的作用对于工程凝胶材料实现其优化的性能/功能具有相当重要的意义。在这项工作中，我们提出了一种新的方法为纤维凝胶材料的动力学结构分析。在该方法中，动力学数据是使用流变学技术获得的，并在一个扩展的Dickinson模型，其中考虑到在凝胶化过程中的动态流变性能的标度行为进行分析。它使我们能够提取的结构参数，即分形维数，从动态流变测量的凝胶化过程中的纤维凝胶，并建立动力学结构的关系，适合于稀释和浓缩的凝胶系统。在以前的研究中报道的分形分析方法相比，我们的方法是有利的，由于其广泛的纤维凝胶的分形结构的普遍有效性，从一个高度紧凑的网络的球晶域的一个开放的纤维网络结构。通过这种动力学-结构分析，我们可以定量地了解动力学控制在凝胶材料纤维网络微观结构工程中的作用。
Understanding the role of kinetics in fiber network microstructure formation is of considerable importance in engineering gel materials to achieve their optimized performances/functionalities. In this work, we present a new approach for kinetic-structure analysis for fibrous gel materials. In this method, kinetic data is acquired using a rheology technique and is analyzed in terms of an extended Dickinson model in which the scaling behaviors of dynamic rheological properties in the gelation process are taken into account. It enables us to extract the structural parameter, i.e. the fractal dimension, of a fibrous gel from the dynamic rheological measurement of the gelation process, and to establish the kinetic-structure relationship suitable for both dilute and concentrated gelling systems. In comparison to the fractal analysis method reported in a previous study, our method is advantageous due to its general validity for a wide range of fractal structures of fibrous gels, from a highly compact network of the spherulitic domains to an open fibrous network structure. With such a kinetic-structure analysis, we can gain a quantitative understanding of the role of kinetic control in engineering the microstructure of the fiber network in gel materials.