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Hermetic stretchable seals enabled by a viscoplastic surface effect.

Rui Xia^1,2, Chun Li^1,3, Yan Shao^1,4

¹Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, China.

Nature Materials

|October 17, 2025

Summary

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This summary is machine-generated.

Researchers developed a new viscoplastic surface effect in elastomers. This breakthrough enables highly stretchable and hermetic seals for advanced electronics, extending their operational lifetime.

Area of Science:

Materials Science
Polymer Science
Electronics Engineering

Background:

Elastic seals are crucial for protecting stretchable electronics from environmental factors.
Current elastomers have limitations in hermeticity due to device contact and small-molecule permeability.

Purpose of the Study:

To develop a novel sealing platform with high hermeticity and stretchability for electronic devices.
To overcome the limitations of conventional elastic seals in protecting sensitive electronics.

Main Methods:

Investigated a viscoplastic surface effect in polymeric elastomers by controlling phase separation of polar plastics in block copolymers.
Engineered defect-free interfaces on elastomer surfaces for airtight integration and gas barrier assembly.

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Main Results:

Achieved defect-free elastomer interfaces irrespective of size, material chemistry, or geometry.
Developed a multilayer seal with scavenging components exhibiting hermeticity comparable to aluminum foil while maintaining rubber-band-like stretchability.
Demonstrated extended operational lifetime for perovskite optoelectronics, hydrogel thermoelectrics, and implantable bioelectronics.

Conclusions:

The viscoplastic surface effect in elastomers offers a promising solution for high-performance hermetic sealing in stretchable electronics.
This technology enables seamless integration and robust protection, enhancing device durability and efficiency.
The developed sealing platforms significantly advance the field of flexible and wearable electronics.