Mechanical training drives structural remodeling of zwitterionic hydrogels

Area of Science:

• Materials Science
• Biomaterials Engineering
• Polymer Chemistry

Background:

• Developing soft materials with muscle-like functionality is hindered by difficulties in achieving self-arranged structures.
• Anisotropic properties are crucial for advanced material applications, but controlled synthesis remains challenging.

Purpose of the Study:

• To develop an anisotropic dual-network (DN) hydrogel with self-arranged structures using a training-induced strategy.
• To enhance the mechanical properties of hydrogels for applications like wearable sensors.
• To explore the potential of these hydrogels as substrates for directional cell growth.

Main Methods:

• Fabrication of an anisotropic dual-network (DN) hydrogel using zwitterionic-based composite materials.
• Implementation of a mechanical training strategy to induce structural formation and enhance material properties.
• Characterization of mechanical properties, including storage modulus and crack resistance.
• Evaluation of the hydrogel's potential as a substrate for directional cell growth.

Main Results:

• The developed hydrogel exhibits self-arranged anisotropic structures through a bottom-up mechanism.
• Mechanical training significantly improved the hydrogel's storage modulus (approximately threefold) and crack resistance.
• The material demonstrates potential for use in crack-resistant wearable sensors.
• The hydrogel's directional cues at the micron scale support directional cell growth.

Conclusions:

• The training-induced strategy offers a simple yet effective method for creating advanced anisotropic soft materials.
• The enhanced mechanical properties and directional cues position these hydrogels as promising candidates for next-generation wearable electronics and tissue engineering scaffolds.