Functional Hydrogels Fabricated via 4D Printing – Synthesis and Evaluation of Responsive Properties

In this study, functional hydrogels were developed using advanced 4D printing technology, enabling the design of materials capable of dynamically responding to environmental stimuli. This approach allowed the fabrication of structures with programmable changes in shape and properties triggered by external factors such as temperature and humidity.

The obtained hydrogels were subjected to comprehensive characterization, including morphological analysis, evaluation of swelling and shrinkage behavior under varying conditions, structural stability, and mechanical performance. The results demonstrated that the use of 4D printing enables precise control over the architecture of hydrogel structures and provides the ability to engineer tailored responsive functionalities. Furthermore, correlations were identified between the hydrogel composition and the kinetics of their response, offering possibilities for designing materials adapted to specific biomedical or engineering applications.

The findings confirm that the developed hydrogels hold significant potential in areas such as regenerative medicine, drug delivery systems, and material engineering, where adaptability to changing environmental conditions is crucial. This work highlights the role of 4D printing as a powerful tool for the creation of intelligent materials with dynamic and customizable properties.

This research was carried out within the SMART-MAT Functional Materials Science Club of the Faculty of Materials Engineering and Physics at Cracow University of Technology (section SmartMat) and as part of the project entitled, „Functional hydrogels obtained by using 4D printing” financed by the FutureLab organization operating at Cracow University of Technology.