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An information encrypted heterogeneous hydrogel with programmable mechanical properties enabled by 3D patterning.

Yuhang Ye1, Zhengyang Yu1, Yifan Zhang1

  • 1Sustainable Functional Biomaterials Lab, Department of Wood Science, University of British Columbia, 2900 - 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada. feng.jiang@ubc.ca.

Materials Horizons
|May 3, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed a 3D printing technique using all-cellulose ink to create complex hydrogel structures. This biomimetic approach enables programmable mechanical properties and thermal responsiveness for advanced material applications.

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Area of Science:

  • Materials Science
  • Biomaterials Engineering
  • Polymer Science

Background:

  • Mimicking natural heterogeneous architectures is key for developing advanced biomimetic materials.
  • Creating soft matter like hydrogels with both mechanical strength and functionality is challenging.
  • Existing methods struggle to integrate complex structures and tunable properties in hydrogels.

Purpose of the Study:

  • To develop a simple and adaptable 3D printing strategy for creating complex structures within hydrogels.
  • To utilize all-cellulosic materials as ink for enhanced hydrogel properties.
  • To achieve programmable mechanical properties and thermal responsiveness in biomimetic hydrogels.

Main Methods:

  • 3D printing of complex structures using a hydroxypropyl cellulose/cellulose nanofibril (HPC/CNF) ink within hydrogels.
  • Investigating interfacial interactions between the cellulosic ink and hydrogel matrix for structural integrity.
  • Designing the geometry of 3D printed patterns to control mechanical properties.
  • Leveraging the thermally induced phase separation of HPC for responsive behavior.

Main Results:

  • Successfully fabricated complex 3D patterned hydrogel hybrids using an all-cellulose ink.
  • Demonstrated that interfacial interactions are crucial for the structural integrity of the patterned hydrogels.
  • Achieved programmable mechanical properties by controlling the geometry of the 3D printed patterns.
  • Imparted thermal responsiveness to the hydrogels due to the properties of HPC.

Conclusions:

  • The all-cellulose ink-enabled 3D patterning technique offers a sustainable and versatile approach for hydrogel fabrication.
  • This method allows for the design of biomimetic hydrogels with tailored mechanical properties and functionalities.
  • The developed hydrogels show potential for applications in areas like information encryption devices and shape-morphing materials.