Surface-engineered caterpillar-like silica nanocomposites for enhanced interparticle friction and interlock in shear thickening suspension

被引：0

作者：

Wang, Xiaobing ^{[1
]}

Wang, Lujie ^{[1
]}

Zhou, Yi ^{[1
]}

Lu, Ying ^{[1
]}

Liu, Jing ^{[1
]}

Zhu, Lanyan ^{[2
]}

Ding, Zhao ^{[3
]}

Zhou, Yang ^{[1
]}

机构：

[1] School of Textile Science and Engineering / State Key Laboratory of New Textile Materials and Advanced Processing Technology, Wuhan Textile University, Wuhan,430200, China

[2] School of Electronics and Electrical Engineering, Wuhan Textile University, Wuhan,430200, China

[3] College of Materials Science and Engineering / National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing,400044, China

来源：

Journal of Molecular Liquids | 2024年 / 414卷

关键词：

D O I：

10.1016/j.molliq.2024.126264

中图分类号：

学科分类号：

摘要：

This study presents a novel method for fabricating surface-engineered caterpillar-like silica nanocomposites by combining rod-like nanorods with spherical nanoparticles to control aspect ratios and surface functionalization. This unique design facilitates functional assembly at the nanoscale. Additionally, we developed an innovative composite by encapsulating polyurethane elastomers within shear thickening fluid (STF)-impregnated Kevlar, significantly enhancing the flexibility and durability of the resulting STF/Kevlar/PU composite. Microstructural and chemical modifications were characterized, and detailed rheological analysis revealed a 165 % increase in viscosity and a substantial rise in storage modulus from 91.56 to 18,640 Pa, indicating improved surface morphology and roughness. These enhancements promoted stronger interparticle friction and rotational motion during flow. Impact resistance tests further demonstrated a 314 % increase in peak impact force, driven by frictional interactions between the dispersed caterpillar-like particles. The results confirmed that surface roughness and adhesive forces play a critical role in activating stress-dependent frictional contacts, a key mechanism behind the improved performance. These findings highlight the potential of these composites for mitigating penetration injuries and offer precise control over the shear-thickening transition in engineering applications, making them promising candidates for lightweight protective materials. © 2024 Elsevier B.V.

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