4D Printing of Thermoresponsive OEGMA‐Based Hydrogels with Tunable Response DOI Creative Commons
H. B. Duc Tran, Christoph A. Spiegel, Eva Blasco

et al.

Macromolecular Materials and Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: May 7, 2025

Abstract Hydrogels, particularly those exhibiting responsive behaviors, have gained significant attention, especially with the advent of 4D printing. Among thermoresponsive hydrogels, poly( N ‐isopropylacrylamide) (PNIPAM)‐based materials remain a benchmark for microprinting, featuring typical lower critical solution temperatures (LCSTs) ranging from 32 to 37 °C. However, precise tuning LCST broader temperature range is necessary expand application window. This study introduces poly(oligo(ethylene glycol)methacrylate) (POEGMA)‐based polymers as alternative two‐photon laser printing (2PLP). First, library prepolymers LCSTs 33 66 °C synthesized and characterized. By formulating these suitable photoinitiator in water, inks compatible 2PLP are created. The performance each ink evaluated by fabricating complex microstructures, including various platonic solids °C, surpassing constraints PNIPAM. actuation material quantitatively monitoring volume changes at different temperatures. Finally, arrays “twistable” tetrahedrons fabricated employing designed materials, showcasing temperature‐selective actuation. Thus, it demonstrated that careful design macromolecular architecture offers adjustment final printed feature highly beneficial applications like soft microrobotics among others.

Language: Английский

An overview of recent advancements in 4D printing of alginate hydrogels for tissue regeneration DOI

Y. Liu,

Aixiang Ding

Journal of Biomaterials Science Polymer Edition, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 34

Published: May 24, 2025

4D printing of alginate hydrogels has emerged as a transformative strategy in tissue engineering, enabling the fabrication stimuli-responsive scaffolds that recapitulate temporal and spatial complexities native tissues. Leveraging alginate's tunable crosslinking, biocompatibility, easy modification, recent research demonstrated successful design constructs capable programmable shape morphing response to physiological stimuli. This review highlights advances polymer design, including methacrylated, oxidized, ligand-functionalized derivatives, cutting-edge technologies such extrusion-based photopolymerization-based technologies. Notably, these systems have shown promising outcomes regenerating cartilage, bone, vascular, neural However, key challenges remain, standardization shape-morphing quantification, enhancement mechanical robustness, improvement host integration, replication complexity. concludes with critical evaluation current limitations future directions, highlighting potential integrating hydrogel emerging artificial intelligence, machine learning, organoid models, bioelectronic interfaces accelerate innovation broaden their application engineering. By synthesizing advancements offering insights into implementation hydrogels, this aims stimulate continued progress rapidly evolving field.

Language: Английский

Citations

0
Hydrogel-Based Continuum Soft Robots DOI Creative Commons
Honghong Wang, Jingli Du, Yi Mao

et al.

Gels, Journal Year: 2025, Volume and Issue: 11(4), P. 254 - 254

Published: March 27, 2025

This paper comprehensively reviews the latest advances in hydrogel-based continuum soft robots. Hydrogels exhibit exceptional flexibility and adaptability compared to traditional robots reliant on rigid structures, making them ideal as biomimetic robotic skins platforms for constructing highly accurate, real-time responsive sensory interfaces. The article systematically summarizes recent research developments across several key dimensions, including application domains, fabrication methods, actuator technologies, sensing mechanisms. From an perspective, span healthcare, manufacturing, agriculture. Regarding techniques, extensively explores crosslinking additive microfluidics, other related processes. Additionally, categorizes thoroughly discusses various actuators solute/solvent variations, pH, chemical reactions, temperature, light, magnetic fields, electric hydraulic/electro-osmotic stimuli, humidity. It also details strategies designing implementing diverse sensors, strain, pressure, humidity, conductive, magnetic, thermal, gas, optical, multimodal sensors. Finally, offers in-depth discussion of prospective applications robots, particularly emphasizing their potential medical industrial fields. Concluding remarks include a forward-looking outlook highlighting future challenges promising directions.

Language: Английский

Citations

0
A 3D‐dynamic networks strategy utilizing SiO2‐nanoscale ionic materials in novel waterborne polyurethane ionic nanocomposites for fast self‐healing and UV‐blocking performance DOI
Ashkan Taheri, Fatemeh Rafiemanzelat, Negar Farzanehfar

et al.

Polymer Composites, Journal Year: 2025, Volume and Issue: unknown

Published: March 29, 2025

Abstract Waterborne polyurethane (WPU) is one of the most applicable products used in various industries to manufacture smart coatings with self‐healing ability due its being environmentally friendly. However, self‐healable WPU suffer from long healing times, low transparency, and poor physicochemical properties. Herein, ionic nanocomposite were prepared based on SiO 2 ‐nanoscale materials (SiO ‐NIMs) novel WPU, fast ability, high UV‐blocking performance. We demonstrate that ‐NIMs can significantly act as a unique agent their fluid 3D‐dynamic networks hard core‐corona ‐SO 3 − ) soft segments (canopy). The optical micrographs show film containing phr completely repaired after 20 min at 50°C. tensile test illustrates elongation break, strength, toughness values healed sample recovered 78.2%, 94.2%, 69.3% original film, respectively. differential scanning calorimetry, x‐ray diffraction, dynamic mechanical‐thermal tests applied confirm core‐corona‐canopy segments' hardening excellent damping behavior matrix. thermogravimetric analyses enhance thermal stability mechanical properties WPU. This study introduces strategy for preparing polymers outstanding Highlights Synthesized anionic Congo red. Introducing strategy‐based coatings. Enhancement thermo‐mechanical healable abilities coating.

Language: Английский

Citations

0
4D Printing of Thermoresponsive OEGMA‐Based Hydrogels with Tunable Response DOI Creative Commons
H. B. Duc Tran, Christoph A. Spiegel, Eva Blasco

et al.

Macromolecular Materials and Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: May 7, 2025

Abstract Hydrogels, particularly those exhibiting responsive behaviors, have gained significant attention, especially with the advent of 4D printing. Among thermoresponsive hydrogels, poly( N ‐isopropylacrylamide) (PNIPAM)‐based materials remain a benchmark for microprinting, featuring typical lower critical solution temperatures (LCSTs) ranging from 32 to 37 °C. However, precise tuning LCST broader temperature range is necessary expand application window. This study introduces poly(oligo(ethylene glycol)methacrylate) (POEGMA)‐based polymers as alternative two‐photon laser printing (2PLP). First, library prepolymers LCSTs 33 66 °C synthesized and characterized. By formulating these suitable photoinitiator in water, inks compatible 2PLP are created. The performance each ink evaluated by fabricating complex microstructures, including various platonic solids °C, surpassing constraints PNIPAM. actuation material quantitatively monitoring volume changes at different temperatures. Finally, arrays “twistable” tetrahedrons fabricated employing designed materials, showcasing temperature‐selective actuation. Thus, it demonstrated that careful design macromolecular architecture offers adjustment final printed feature highly beneficial applications like soft microrobotics among others.

Language: Английский

Citations

0