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<p>Skin-mimetic conductive hydrogels capable of simultaneously integrating mechanical compliance, stable charge transport, and multifunctional signal output are highly desirable for next-generation biointegrated electronics, yet remain challenging due to intrinsic trade-offs among conductivity, stretchability, and interfacial stability. Herein, we report an interfacial-coupling-engineered MXene–PEDOT:PSS conductive hydrogel that enables dynamically reconfigurable charge transport within a polymer network. In this design, MXene nanosheets function as a two-dimensional conductive scaffold, while PEDOT:PSS acts as a conjugated polymer bridge to construct continuous electron transport pathways within a polyacrylamide matrix. The synergistic integration of hydrogen bonding, electrostatic interactions, and coordination interactions between MXene, PEDOT:PSS, and polymer chains enables simultaneous optimization of mechanical and electrical properties. The hydrogel exhibits a tensile strength of 74.9&#xa0;kPa and a fracture strain of 586%, robust adhesion to porcine skin (32&#xa0;kPa), and excellent self-healing capability with a healed fracture strain of 442% (75.4% of the pristine sample). It also demonstrates high sensitivity across 0–500% strain with a gauge factor of 11.03. Furthermore, it maintains stable signal output under high-frequency strain (0.4&#xa0;Hz). Its overall performance surpasses that of conventional PEDOT:PSS-based conductive hydrogels. Beyond mechanical sensing, the hydrogel enables motion-driven information encoding and transmission via wearable Morse-code demonstrations. This work establishes an interfacial-coupling-driven materials design paradigm for multifunctional conductive hydrogels, offering new opportunities for multimodal sensing, biointegrated electronics, and intelligent soft communication systems.</p> Graphical abstract <p></p> <p>Interfacial-coupling-engineered MXene–PEDOT:PSS conductive hydrogels enable dynamically reconfigurable charge transport, combining high stretchability, strong tissue adhesion, and sensitive strain response. The hydrogel further enables motion-driven wearable information encoding, providing a versatile platform for multimodal sensing and soft biointegrated electronic communication.</p>

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Multifunctional PEDOT:PSS/MXene hydrogel with high stretchability, adhesion, and self-healing for information encryption

  • 期刊论文

  • 发表日期：

    2026年5月18日

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  • Pingping Wu,
  • Wenjia Cao,
  • Xuegang Hao,
  • Mingwei Chang,
  • Weichao Su,
  • Sijing Zhang,
  • Yuanzhen Zhou

摘要

Skin-mimetic conductive hydrogels capable of simultaneously integrating mechanical compliance, stable charge transport, and multifunctional signal output are highly desirable for next-generation biointegrated electronics, yet remain challenging due to intrinsic trade-offs among conductivity, stretchability, and interfacial stability. Herein, we report an interfacial-coupling-engineered MXene–PEDOT:PSS conductive hydrogel that enables dynamically reconfigurable charge transport within a polymer network. In this design, MXene nanosheets function as a two-dimensional conductive scaffold, while PEDOT:PSS acts as a conjugated polymer bridge to construct continuous electron transport pathways within a polyacrylamide matrix. The synergistic integration of hydrogen bonding, electrostatic interactions, and coordination interactions between MXene, PEDOT:PSS, and polymer chains enables simultaneous optimization of mechanical and electrical properties. The hydrogel exhibits a tensile strength of 74.9 kPa and a fracture strain of 586%, robust adhesion to porcine skin (32 kPa), and excellent self-healing capability with a healed fracture strain of 442% (75.4% of the pristine sample). It also demonstrates high sensitivity across 0–500% strain with a gauge factor of 11.03. Furthermore, it maintains stable signal output under high-frequency strain (0.4 Hz). Its overall performance surpasses that of conventional PEDOT:PSS-based conductive hydrogels. Beyond mechanical sensing, the hydrogel enables motion-driven information encoding and transmission via wearable Morse-code demonstrations. This work establishes an interfacial-coupling-driven materials design paradigm for multifunctional conductive hydrogels, offering new opportunities for multimodal sensing, biointegrated electronics, and intelligent soft communication systems.

Graphical abstract

Interfacial-coupling-engineered MXene–PEDOT:PSS conductive hydrogels enable dynamically reconfigurable charge transport, combining high stretchability, strong tissue adhesion, and sensitive strain response. The hydrogel further enables motion-driven wearable information encoding, providing a versatile platform for multimodal sensing and soft biointegrated electronic communication.