Issue 1, 2024

Construction of nano-silica particle clusters and their effects on the shear thickening properties of liquids

Abstract

It is of great research significance to prepare a new shear thickening fluid (STF) with a simple process, remarkable thickening effect and excellent impact resistance from the properties of the particles. Inspired by the shear thickening mechanism, nano-silica particle clusters (SPC) with different morphological structures were prepared by the reaction of amino-modified silica with polyethylene glycol diglycidyl ether (PEGDGE), and the structure models of particle clusters were designed through theoretical analysis. The structure of SPC was affected by the degree of amination modification and the molecular weight of PEGDGE, which was analyzed by DLS and TEM. The shear thickening behavior of the fluid was evaluated by steady-state rheology and dynamic-state rheology analysis. The shear thickening behavior of the fluid composed of SPC also changed greatly with the influence of the degree of amination modification and the molecular weight of PEGDGE. In addition, compared with the STF contained original silica, the STF contained SPC could produce a faster and stronger shear thickening response. Therefore, silica particle clusters are not only a promising candidate for the preparation of high-performance shear thickening fluids, but can also be better applied to industrial and scientific fields such as impact protection and shock absorption.

Graphical abstract: Construction of nano-silica particle clusters and their effects on the shear thickening properties of liquids

Article information

Article type
Paper
Submitted
13 Sep 2023
Accepted
27 Nov 2023
First published
30 Nov 2023

Soft Matter, 2024,20, 255-265

Construction of nano-silica particle clusters and their effects on the shear thickening properties of liquids

X. Zhang, J. Zheng, J. Pan, X. Zhang, J. Fang, J. Min and C. Yu, Soft Matter, 2024, 20, 255 DOI: 10.1039/D3SM01217D

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