Related Experiment Video
Updated: Jun 16, 2025
06:36
3D Printed Porous Cellulose Nanocomposite Hydrogel Scaffolds
Published on: April 24, 2019
9.5K
Single-Component Cellulose Acetate Sulfate Hydrogels for Direct Ink Writing 3D Printing
Seonghyun Park1, Tavila Sharmin2,3, Seong-Min Cho1
1Department of Forest Biomaterials, North Carolina State University, Raleigh, North Carolina 27607, United States.
Biomacromolecules
|August 21, 2024
Summary
Environmentally friendly cellulose acetate sulfate (CAS) hydrogels were developed for 3D printing. Optimized CAS hydrogels with specific sulfate substitution and concentration showed excellent printability and structural integrity after ionic cross-linking.
Area of Science:
- Materials Science
- Polymer Chemistry
- Biomaterials Engineering
Background:
- Growing environmental concerns drive demand for sustainable alternatives to traditional hydrogels.
- Cellulose derivatives offer a promising renewable resource for advanced material applications.
- Cellulose acetate sulfate (CAS) presents unique properties for hydrogel formulation.
Purpose of the Study:
- To develop and optimize cellulose-based hydrogels from cellulose acetate sulfate (CAS) for 3D printing applications.
- To investigate the influence of sulfate group substitution and CAS concentration on hydrogel rheology.
- To evaluate the printability and structural integrity of CAS hydrogels, including the effect of ionic cross-linking.
Main Methods:
- Systematic variation of sulfate group substitution (DSsulfate) and CAS concentration (2-5 wt %).
- Rheological characterization (shear-thinning, yield stress, thixotropy) to determine optimal ink properties.
- Direct ink writing (DIW) 3D printing using optimized CAS hydrogel formulations.
- Evaluation of 3D-printed structure integrity and behavior (swelling, shrinking) with Ca2+ ionic cross-linking.
Main Results:
- Optimal rheological properties for 3D printing were achieved with CAS hydrogels at DSsulfate = 0.7 and 4 wt % concentration.
- The selected CAS hydrogel formulation demonstrated successful direct ink writing capabilities.
- Ionic cross-linking with Ca2+ ions significantly enhanced the structural integrity and stability of the 3D-printed hydrogel constructs.
- Cross-linking effectively modulated the swelling and shrinking behaviors of the printed structures.
Conclusions:
- Cellulose acetate sulfate (CAS) is a viable precursor for fabricating eco-friendly hydrogels suitable for 3D printing.
- Tailoring sulfate substitution and concentration allows for precise control over hydrogel rheology for direct ink writing.
- Ionic cross-linking provides an effective strategy to improve the mechanical stability and performance of 3D-printed CAS hydrogels.
- This research expands the potential of cellulose derivatives in the field of 3D-printed biomaterials.
