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Related Experiment Video

Updated: Jun 3, 2026

Synthesis of Thermogelling Poly(N-isopropylacrylamide)-graft-chondroitin Sulfate Composites with Alginate Microparticles for Tissue Engineering

Synthesis of Thermogelling Poly(N-isopropylacrylamide)-graft-chondroitin Sulfate Composites with Alginate Microparticles for Tissue Engineering

Published on: October 26, 2016

Ionic Hydration Engineering Enables Tissue-Like Conductive all-Polymer Hydrogels With Subzero-Temperature Tolerance.

Tiantian Zhuang¹, Yanqiu Yao², Xin Hao²

¹Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China.

Small (Weinheim an Der Bergstrasse, Germany)

|June 2, 2026

Summary

This summary is machine-generated.

This study introduces a new conductive hydrogel that maintains flexibility and electrical function in extreme cold. This innovation overcomes ice-induced failures for advanced bioelectronic devices in subzero environments.

Keywords:

all‐polymer hydrogels biocompatibility human‐machine interface low‐temperature tolerance subzero‐temperature applications

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Published on: August 4, 2017

Area of Science:

Materials Science
Polymer Chemistry
Bioelectronics

Background:

Conductive all-polymer hydrogels (c-APHs) exhibit poor performance in subzero temperatures due to ice formation.
Ice-induced mechanical failure and conductivity loss limit c-APH applications in cold environments.

Purpose of the Study:

To develop a cryo-compatible conductive all-polymer hydrogel.
To overcome the trade-off between subzero-temperature performance and softness in bioelectronics.

Main Methods:

Ionic hydration engineering using poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate (PEDOT:PSS) nanofibrils in a polyvinyl alcohol (PVA) matrix.
Na2SO4 mediation to control hydrogel properties and ice formation.
Characterization of electrical conductivity, mechanical softness, charge storage, and electrochemical stability.

Main Results:

Optimized hydrogel achieved high electrical conductivity (35.0 S/cm at -20°C, 27.2 S/cm at -70°C) and tissue-like softness (0.5-1.3 MPa).
Demonstrated high charge storage (16.0 mC·cm-2) and injectable signal transmission (3.04 mC·cm-2).
Successful application in a human-machine interface glove for robotic control in subzero conditions (-70°C).

Conclusions:

The developed hydrogel offers a viable solution for bioelectronic applications in extreme cold.
Ionic hydration engineering effectively enhances hydrogel performance and resilience in subzero environments.
This breakthrough enables advanced wearable sensors, neural interfaces, and robotics for extreme-temperature operations.