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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
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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
PubMed
Summary

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 hydrogelsbiocompatibilityhuman‐machine interfacelow‐temperature tolerancesubzero‐temperature applications

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Easy Manipulation of Architectures in Protein-based Hydrogels for Cell Culture Applications

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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.