Liang, Xiangyu;
Chen, Guangda;
Lei, Iek Man;
Zhang, Pei;
Wang, Zeyu;
Chen, Xingmei;
Lu, Mengze;
... Liu, Ji; + view all
(2023)
Impact-Resistant Hydrogels by Harnessing 2D Hierarchical Structures.
Advanced Materials
, 35
(1)
, Article 2207587. 10.1002/adma.202207587.
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Abstract
With the strengthening capacity through harnessing multi-length-scale structural hierarchy, synthetic hydrogels hold tremendous promise as a low-cost and abundant material for applications demanding unprecedented mechanical robustness. However, integrating high impact resistance and high water content yet superior softness in a single hydrogel material still remains a grand challenge. Here, we report a simple yet effective strategy involving bidirectional freeze-casting and compression annealing, leading to a hierarchically-structured hydrogel material. Rational engineering of the distinct 2D lamellar structures, well-defined nanocrystalline domains and robust interfacial interaction among the lamellae, synergistically contributes to a record-high ballistic energy absorption capability (i.e. 2.1 kJ m-1 ), without sacrificing their high water content (i.e. 85 wt.%) and superior softness. Together with its low-cost and extraordinary energy dissipation capacity, our hydrogel materials present a durable alternative to conventional hydrogel materials for armour-like protection circumstances.
| Type: | Article |
|---|---|
| Title: | Impact-Resistant Hydrogels by Harnessing 2D Hierarchical Structures |
| Location: | Germany |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/adma.202207587 |
| Publisher version: | https://doi.org/10.1002/adma.202207587 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | 2D lamellar structures, ballistic resistance, crystalline, hydrogel, impact resistant |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10158260 |
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