High energy dissipation and self-healing auxetic foam by integrating shear thickening gel
Zhang, K; Gao, Q; Jiang, J; et al.Chan, M; Zhai, X; Jin, L; Zhang, J; Li, J; Liao, W-H
Date: 5 February 2024
Article
Journal
Composites Science and Technology
Publisher
Elsevier
Publisher DOI
Abstract
Herein, we report a novel hybrid auxetic foam (HAF) with high energy dissipation and self-healing
properties prepared by integrating shear thickening gel (STG) with auxetic polyurethane foam
(APF). Due to the synergetic action of shear thickening property of STG and the negative Poisson’s
ratio of APF, HAF shows better impact ...
Herein, we report a novel hybrid auxetic foam (HAF) with high energy dissipation and self-healing
properties prepared by integrating shear thickening gel (STG) with auxetic polyurethane foam
(APF). Due to the synergetic action of shear thickening property of STG and the negative Poisson’s
ratio of APF, HAF shows better impact protection performance than APF and PU foam. The quasi static compression test shows the energy dissipation ability of HAF is around 4 times that of APF.
The dynamic impact test demonstrates that the force reduction of HAF increases by as high as
64%, compared to APF. Notably, the force reduction improvement of the HAF is much higher than
other hybrid auxetic materials. It is also found that the peak force of HAF is reduced as the amount
of STG increases. Additionally, the peak force difference between HAF and APF becomes larger
2
when they are subjected to higher impact energies, due to the rate-dependent effect of STG inside
the foam. The Poisson’s ratio results for HAF with different STG content under low and high
compression strain rates reveal that the dimension of auxetic cell structures and STG content are
required to be carefully designed to maximize the synergistic effect of auxetic property and shear
thickening property. Besides, HAF demonstrates self-healing ability, allowing it to repair damage
sustained during use and can be assembled like Lego blocks to make structures with any irregular
shapes. Our work provides ideas for the development of advanced auxetic materials, with the
potential to revolutionize a wide range of applications.
Engineering
Faculty of Environment, Science and Economy
Item views 0
Full item downloads 0
Except where otherwise noted, this item's licence is described as © 2024 Published by Elsevier Ltd. This version is made available under the CC-BY-NC-ND 4.0 license: https://creativecommons.org/licenses/by-nc-nd/4.0/