Related Experiment Video
Updated: Aug 8, 2025
06:36
3D Printed Porous Cellulose Nanocomposite Hydrogel Scaffolds
Published on: April 24, 2019
9.7K
Codesign of Biobased Cellulose-Filled Filaments and Mesostructures for 4D Printing Humidity Responsive Smart
Yasaman Tahouni1,2, Tiffany Cheng1,2, Silvia Lajewski3
1Institute for Computational Design and Construction (ICD), University of Stuttgart, Stuttgart, Germany.
3D Printing and Additive Manufacturing
|February 28, 2023
Summary
Researchers developed 4D printed smart structures using cellulose-based materials that change shape with humidity. These hygromorphic devices offer fast, reversible, and repeatable movements for diverse applications.
Area of Science:
- Materials Science
- Smart Structures
- Additive Manufacturing
Background:
- Hygromorphic smart structures enable passive actuation for applications like adaptive wearables and microrobotics.
- Four-dimensional (4D) printing facilitates multiscale fabrication and physical programming of these structures.
- Material limitations hinder reliable humidity-responsive actuation in current 4D printed designs.
Purpose of the Study:
- To codesign 4D printed hygromorphic structures using fused filament fabrication.
- To develop biobased cellulose-filled filaments with tunable stiffness and humidity responsiveness.
- To investigate the impact of mesoscale structuring on the performance of 4D printed hygromorphic elements.
Main Methods:
- Compounding cellulose powder (0-30% mass ratio) into two matrix polymers to create filaments.
- Designing, fabricating, and testing 4D printed prototypes with varying filament compositions and structures.
- Evaluating shape transformation in response to relative humidity (RH) levels between 35% and 90%.
Main Results:
- Developed cellulose-filled filaments with controlled stiffness and hygroresponsive properties.
- Demonstrated 4D printed structures capable of shape transformation (opening/closing) in response to RH changes.
- Observed fast (minutes), fully reversible, and repeatable actuation across multiple cycles within 35-90% RH.
Conclusions:
- A codesign method for 4D printing functional hygromorphic structures was successfully established.
- Biobased cellulose materials offer a promising route for developing advanced humidity-responsive smart materials.
- This work advances the utilization of 4D printing and natural resources for next-generation smart structures.
Keywords:
adaptive architecturebiobased polymersfused filament fabricationhygromorphsmaterial programming
