Polyurethane-Based Self-Healable Flexible Sensors Integrate Mechanical Integrity, Conductivity, and Multifunctionality via Molecular Engineering

August 30, 2026

ACS Publications (ACS Nano) USA

Overview

The field of self-healing flexible sensors is evolving beyond basic crack closure to coordinated recovery of mechanical integrity, adhesion, and conductivity. This review highlights advances in polyurethane-based sensors, emphasizing how molecular design, dynamic network formation, and conductive pathway reconstruction enable the integration of self-adhesion, shape memory, antibacterial, and antifouling properties. These developments are crucial for applications in epidermal electronics and soft robotics, underscoring the need for a systematic understanding of molecular design’s influence on device-level performance.

In Depth

Key Findings

Self-healable flexible sensors are advancing significantly, moving beyond simple crack closure to achieve coordinated recovery of mechanical integrity, adhesion, and electrical conductivity. This review highlights polyurethane-based sensors as a focal point, demonstrating how molecular engineering, dynamic network formation, and conductive pathway reconstruction can integrate multifunctional properties such as self-adhesion, shape memory, antibacterial, and antifouling capabilities.

Technical / Clinical Details

This progress is achieved through precise molecular-level design of polyurethane, particularly via the formation of dynamic covalent and non-covalent networks. These dynamic networks enable the material to reconnect and restore its original structure and function after damage. Furthermore, by controlling the proper dispersion and rearrangement of conductive fillers (e.g., carbon nanotubes, metal nanoparticles), the reconstruction of conductive pathways after damage is optimized. This brings closer the realization of devices like epidermal electronics and soft robotics that can withstand complex movements and deformations while autonomously self-healing. For example, a damaged sensor could autonomously repair itself, maintaining continuous bio-signal monitoring or robotic functionality.

Background & Context

In the fields of flexible electronics and soft robotics, device durability and reliability have consistently posed challenges. Conventional materials often suffer from mechanical damage and degradation due to repeated use, leading to shorter device lifespans. The introduction of self-healing functionalities aims to overcome this issue, contributing to reduced operational costs and improved sustainability. Moreover, the integration of multiple functionalities opens up new application opportunities across various sectors, including healthcare, industrial, and consumer products.

Strategic Significance & Outlook

The advancements in self-healable polyurethane-based flexible sensors are critical for shaping the future of smart materials. Further deepening the systematic understanding between molecular design and device-level performance will lead to the development of even higher-performing and more reliable self-healing multifunctional sensors. This promises innovations across various domains, such as extended lifespan for wearable healthcare devices, development of damage-resistant soft robots, and the realization of environmentally friendly electronics. Investors and engineers should pay close attention to the business opportunities presented by these materials, including extended product life, reduced maintenance costs, and the creation of novel user experiences.

Source: https://pubs.acs.org/doi/10.1021/acsnano.6b05421

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