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Related Concept Videos

Design Example: Resistive Touchscreen01:14

Design Example: Resistive Touchscreen

391
A device engineer plays a crucial role in designing user interfaces for mobile devices. One such interface is the resistive touchscreen, which fundamentally consists of two metallic layers: a flexible upper layer and a rigid lower layer, separated by a narrow gap. The high resistance between these two layers is a key characteristic of this design.
When a user touches the screen, the two layers make contact at a specific point known as the touchpoint. This contact reduces the resistance between...
391

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Reconfigurable Touch Panel Based on a Conductive Thixotropic Supramolecular Hydrogel.

Lin Xu1,2, Ying Pan1, Xuanqi Wang3

  • 1Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong250100, China.

ACS Applied Materials & Interfaces
|January 11, 2023
PubMed
Summary

Researchers developed a recyclable and reconfigurable conductive hydrogel for touch panels. This innovation addresses environmental concerns associated with traditional hydrogels, enabling sustainable human-machine interfaces.

Keywords:
hydrogelslow-molecular-weight gelatorsreconfigurable devicessupramolecular nanoassemblytouch panels

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Supramolecular Chemistry

Background:

  • Ionic conductive hydrogels offer flexibility and biocompatibility for human-machine interfaces.
  • Conventional cross-linked hydrogels present recycling and reconfiguration challenges, leading to environmental concerns.

Purpose of the Study:

  • To design a novel conductive molecular hydrogel with thixotropic properties for sustainable touch panel applications.
  • To develop a gelation strategy that allows for room-temperature mechanical recycling and reconfiguration.

Main Methods:

  • A lithium ion-triggered gelation strategy was employed to create supramolecular nanoassemblies.
  • Lithium ions were utilized as ionic bridges and charge carriers for conductivity.
  • Polymer additives were incorporated to enhance mechanical properties for touch panel functionality.

Main Results:

  • A conductive molecular hydrogel with thixotropy was successfully synthesized.
  • The hydrogel demonstrated mechanical recyclability and reconfigurability at room temperature.
  • A surface capacitive touch panel fabricated with this hydrogel exhibited real-time sensing and reliable touch locating capabilities.
  • The touch panel could be reconfigured into 1D, 2D, and 3D structures via stirring and remolding.

Conclusions:

  • This work presents a sustainable approach to hydrogel-based ionotronics using a supramolecular strategy.
  • The developed hydrogel overcomes the limitations of traditional polymeric hydrogels, offering environmental benefits.
  • The reconfigurable nature of the touch panel opens new possibilities for adaptable human-machine interfaces.