Strong and tough self-wrinkling polyelectrolyte hydrogels constructed via a diffusion-complexation strategy
Jianzhuang Shi1, Ruoyu Dong1, Changbin Ji1
1State Key Laboratory of Bio-fibers and Eco-textiles, College of Materials Science and Engineering, Shandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological Textiles, Institute of Marine Biobased Materials, Qingdao University, Qingdao 266071, China.
Soft Matter
|May 4, 2022
Summary
Researchers developed a new method to create strong, self-wrinkling hydrogels. This diffusion-complexation strategy overcomes poor mechanical properties, enabling advanced engineering and biomedical uses.
Area of Science:
- Materials Science
- Polymer Chemistry
- Biomaterials Engineering
Background:
- Self-wrinkling hydrogels are promising for various applications.
- Existing self-wrinkling gels suffer from poor mechanical properties.
- A key challenge is integrating self-wrinkling with mechanical enhancement.
Purpose of the Study:
- To develop a facile strategy for creating strong and ultratough self-wrinkling polyelectrolyte hydrogels.
- To achieve programmable wrinkled structures and customizable 3D configurations.
- To overcome the limitations of poor mechanical properties in current self-wrinkling gels.
Main Methods:
- Utilized a diffusion-complexation strategy involving chitosan polycations and polyanion hydrogels.
- Induced surface compressive stress via hydrogel deswelling for wrinkled structure formation.
- Employed pre-stretched hydrogel sheets to create ordered wrinkled structures during recovery.
- Controlled diffusion-complexation regions for spontaneous transformation into 3D configurations.
Main Results:
- Successfully constructed strong and ultratough self-wrinkling polyelectrolyte hydrogels.
- Achieved programmable wrinkled structures and customizable 3D configurations.
- Demonstrated significantly enhanced mechanical properties due to electrostatic binding (sacrificial bonds).
- Obtained self-wrinkling gels with mechanical properties far superior to previously reported ones.
Conclusions:
- The diffusion-complexation strategy offers a facile route to high-performance self-wrinkling hydrogels.
- This approach enables on-demand design of hydrogels with tunable mechanical properties and complex architectures.
- The developed hydrogels hold potential for advanced engineering and biomedical applications requiring robust materials.
