Engineering Molecular Self-Assembled Fibrillar Networks by Ultrasound
Engineering Molecular Self-Assembled Fibrillar Networks by Ultrasound
复制标题
通过超声波工程分子自组装纤维网络
DOI：
10.1021/cg9000494
复制
发表时间：
2009-05
影响因子：
3.8
通讯作者：
Wang, Rong-Yao
中科院分区：
文献类型：
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作者：
Liu, Xiang-Yang;Li, Jing-Liang;Wang, Rong-Yao
自组织的三维互连的微纤网络的架构已通过超声从由单独的球晶组成的溶液中实现。超声波刺激的结构转变与将非凝胶化溶液或弱凝胶立即转变为强凝胶的显著超声波效应相关，其中储能模量提高高达3个数量级，胶凝能力提高高达4倍。基于纤维网络形成的成核-生长模型，建立了超声波诱导结构转变的基本原理，提出了超声波诱导晶种增殖、抑制聚集、促进纤维分布和生长的机理。这种新技术使我们能够生产自支撑凝胶功能材料，具有显着修改的宏观性能，从材料以前迄今被认为是“无用的”，而不使用化学刺激。此外，它证明…
The architecture of self-organized three-dimensionally interconnected nanocrystal fibrillar networks has been achieved by ultrasound from a solution consisting of separate spherulites. The ultrasound stimulated structural transformation is correlated to the striking ultrasonic effects on turning nongelled solutions or weak gels into strong gels instantly, with enhancement of the storage modulus up to 3 magnitudes and up to 4 times more gelling capability. The basic principle involved in the ultrasound-induced structural transformation is established on the basis of the nucleation-and-growth model of a fiber network formation, and the mechanism of seeding multiplication, aggregation suppressing, and fiber distribution and growth promotion is proposed. This novel technique enables us to produce self-supporting gel functional materials possessing significantly modified macroscopic properties, from materials previously thus far considered to be “useless”, without the use of chemical stimuli. Moreover, it prov...