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题名: Tuning of Ionic Interaction and Rheological Properties of Nanoscale Ionic Materials
作者: Liu Yangjian1; Ruan Yingbo2; Zhang Baoqing2; Qiao Xin2; Liu Chenyang2
关键词: Nanoscale ionic material ; Ionic interaction ; Rheological property ; Strain overshoot
刊名: CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
发表日期: 2016-04-10
卷: 37, 期:4, 页:767-774
收录类别: SCI
英文摘要: We prepared two kinds of silica. based nanoscale ionic materials( NIMs) with increasing SiO2 con. tents, and also with different relative ionic interaction strengths between their constituents( SiO2-SIT-M2070> SiO2-SIT-Ethomeen for the relative ionic interaction strength). The results of transmission electron microscope ( TEM) and small. angle X-ray scattering( SAXS) investigations indicated that there was no obvious nano. particle aggregate in both kinds of NIMs. The differential scanning calorimetry( DSC) results showed that the ionic interactions prohibited the crystallization of out. shell block copolymers in the prepared NIMs. Moreover, the crystallization suppression was more serious with increasing the ionic interaction strength. Ionic interaction also displayed the dramatic influence on the dynamic rheological behavior of as. prepared NIMs. The dynamic shear moduli and viscosities of SiO2-SIT-Ethomeen were about 1- 3 orders of magnitude lower than those of SiO2-SIT-M2070 with the same solid contents. Under the shear of large dynamic strain, SiO2-SIT-M2070with the relatively high solid contents showed the soft glass rheological properties, while SiO2-SIT. Ethomeen showed the phenomenon of strong strain overshoot. Furthermore, the strain that corresponding with the maximum of dynamic shear moduli and viscosities gradually decreased with the increasing of solid contents, and so did the degree of overshoot. All above results suggested that the rheological properties of NIMs could be effectively controlled by carefully tuning the ionic interactions between their constituents.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35945
Appears in Collections:工程塑料实验室_期刊论文

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作者单位: 1.Univ Sci & Technol Beijing, Sch Chem & Biol Engn, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Chem, Key Lab Engn Plast, Beijing 100190, Peoples R China
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