Polyurethane Metalgel with Metallic Electrical Conductivity and Excellent Toughness

Yuan-zhen Wang; Ze-xiu Bai; Ke-yu Chen; Ye Zhang

doi:10.11777/j.issn1000-3304.2025.25171

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Polyurethane Metalgel with Metallic Electrical Conductivity and Excellent Toughness

Research Article | 更新时间：2026-02-01

- Polyurethane Metalgel with Metallic Electrical Conductivity and Excellent Toughness
- Acta Polymerica Sinica Vol. 57, Issue 2, Pages: 388-397(2026)
- 作者机构：
  
  南京大学现代工程与应用科学学院南京大学固体微结构物理全国重点实验室南京 210023
- 作者简介：
  
  Ye Zhang, E-mail: yezhang@nju.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2025.25171
  CLC：
- CSTR：32057.14.GFZXB.2025.7464
- Received：23 July 2025，
  
  Accepted：08 September 2025，
  
  Published Online：27 October 2025，
  
  Published：20 February 2026
- 稿件说明：
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王远贞, 白泽袖, 陈科宇, 张晔. 兼具金属级电导率与优异韧性的聚氨酯金属凝胶. 高分子学报, 2026, 57(2), 388-397.

Wang, Y. Z.; Bai, Z. X.; Chen, K. Y.; Zhang, Y. Polyurethane metalgel with metallic electrical conductivity and excellent toughness. Acta Polymerica Sinica (in Chinese), 2026, 57(2), 388-397.
王远贞, 白泽袖, 陈科宇, 张晔. 兼具金属级电导率与优异韧性的聚氨酯金属凝胶. 高分子学报, 2026, 57(2), 388-397. DOI： 10.11777/j.issn1000-3304.2025.25171. CSTR： 32057.14.GFZXB.2025.7464.

Wang, Y. Z.; Bai, Z. X.; Chen, K. Y.; Zhang, Y. Polyurethane metalgel with metallic electrical conductivity and excellent toughness. Acta Polymerica Sinica (in Chinese), 2026, 57(2), 388-397. DOI： 10.11777/j.issn1000-3304.2025.25171. CSTR： 32057.14.GFZXB.2025.7464.

摘要

柔性电子技术的快速发展亟需兼具金属级电导率与优异韧性的材料，然而现有材料体系无法同时满足上述要求. 本研究设计了一种新型聚氨酯金属凝胶，通过相互作用将液态金属流体稳定固定于聚氨酯三维高分子网络中. 该金属凝胶实现了金属级电导率与超高断裂韧性，同时展现出优异的抗穿刺性能和压力稳定性. 此外，该材料可通过溶液法实现高效回收再利用，经5次循环回收利用后力学和电学性能保持率均超过80%. 本研究突破了传统材料体系的性能局限，为高性能柔性电子材料的设计提供了新范式.

Abstract

The rapid advancement of flexible electronics has created an urgent demand for novel materials that exhibit metal-level electrical conductivity coupled with exceptional toughness. High electrical conductivity is the basis for the functioning of devices

while high toughness is key to adapting to the actual application environment and ensuring stable operation under complex working conditions. However

existing material systems still fail to meet these requirements simultaneously. A gel is defined as a semi-solid material consisting of a fluid fixed within a three-dimensional network; the original fluid is typically water

an organic liquid

or an ionic liquid. In this study

a novel gel material termed "metalgel" was designed

via

a fluid replacement strategy

which features a continuous liquid metal fluid phase stably immobilised within a three-dimensional porous polyurethane polymer network through hydrogen bonding interactions. This unique structure configuration endowed the polyurethane metalgel with metal-level electrical conductivity and ultra-high fracture toughness

while exhibiting excellent resistance to puncture and pressure stability. In addition

the material could be efficiently recycled through the process of solvent treatment

with the retention rate of mechanical and electrical properties being more than 80% after five recycling cycles. This study not only showed the potential to overcome the performance limitations of traditional material systems but also provided a novel paradigm for the design of high-performance flexible electronic materials.

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references

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