Direct Ink Writing of Conductive Hydrogels

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 29, 2025

Abstract Direct ink writing (DIW) is an additive manufacturing technique that has garnered notable interest due to its precise and consistent printing of a wide range materials, such as viscoelastic hydrogels, pastes, complex composites, by adjusting the ink's rheology. This material flexibility combined with ability print at room temperature makes DIW ideal for diverse applications scalable from small industrial levels. In recent years, conductive hydrogels gained significant attention across various fields, ranging biomedical scaffolds flexible electronics. Conductive are category which exhibit conductivity in their wet and/or dry state. Precursors like polymers, metallic nanoparticles, carbon‐based materials can be used induce electronic ionic hydrogels. review presents comprehensive overview demonstrating printability using technique. The fundamentals precursors presented. Following, different pathways reaching optimal hydrogel properties, including mechanical, conductive, rheological, focus on synthesis introduced. Finally, emerging electronics medicine highlighted, anticipated challenges advancement printable discussed.

Language: Английский

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Acetylated Distarch Phosphate-Mediated Tough and Conductive Hydrogel for Antibacterial Wearable Sensors

ACS Applied Materials & Interfaces, Journal Year: 2022, Volume and Issue: 14(45), P. 51420 - 51428

Published: Nov. 1, 2022

Conductive, stretchable, and flexible hydrogel wearable sensors have attracted extensive attention in the fields of artificial intelligence electronic equipment. However, it is an enormous challenge to fabricate conductive with biocompatibility, antibacterial properties, toughness. Here, a highly excellent toughness, good strong properties was prepared by incorporating acetylated distarch phosphate (ADSP) into poly(vinyl alcohol) (PVA)/polyhexamethylene biguanide hydrochloride (PHMG). The addition ADSP not only ionized sodium ions make but also provided abundant hydroxyl groups form hydrogen bonds PVA improve toughness hydrogel. Furthermore, PHMG endowed toward E. coli (Escherichia coli, Gram-negative bacteria) S. aureus (Staphylococcus aureus, Gram-positive bacteria). Meanwhile, implanted mice for 14 days, surrounding tissue remained condition. More importantly, could detect ECG signals electrical under different actions. This study affords novel approach exploiting biocompatibility.

Language: Английский

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3D Printed Ultrasensitive Graphene Hydrogel Self-Adhesive Wearable Devices

ACS Applied Electronic Materials, Journal Year: 2022, Volume and Issue: 4(11), P. 5199 - 5207

Published: Oct. 31, 2022

Ionic hydrogels are conductive and stretchable, showing great potential for applications in flexible wearable devices. However, poor mechanical electrical properties, low manufacturing precision, lack of self-adhesion severely limit their practical hydrogel Herein, we propose a highly conductive, self-adhesive ionic fabricated with an LCD light-curing 3D printing technique. 2-Acrylamido-2-methylpropane sulfonic acid (AMPS), 4-hydroxybutyl acrylate (HBA), graphene incorporated to prepare the printable ion-conductive hydrogel. The results show that this exhibits outstanding conductivity (0.0487 S/cm), excellent linear sensitivity (GF = 1.86 within 100% strain), amazing stretchability (1200% strong adhesion performance various materials. Furthermore, HBA–AMPS–graphene (HAG) hydrogel-based devices can monitor human movements from tiny scale (breathing speaking) large (such as elbow knee joint movement). Most significantly, capture signals pulse beating breathing, which so light they hard be monitored. Our ionized promise motion monitoring, health detection, human–machine interface, on.

Language: Английский

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Α coherent optimization course of the silicon nitride nanofiller load in medical grade isotactic polypropylene for material extrusion additive manufacturing: Rheology, engineering response, and cost-effectiveness

Colloid & Polymer Science, Journal Year: 2024, Volume and Issue: 302(6), P. 843 - 860

Published: Feb. 22, 2024

Abstract By enabling the development of complex structures with adaptable qualities, techniques for additive manufacturing have opened new routes material and research. In this research, silicon nitride (Si 3 N 4 ) ceramic nanoparticles are incorporated into polypropylene (PP) matrices. Various loading levels standardized test specimens that adhere to ASTM criteria created. The main goal is thoroughly characterize these composites an emphasis on their mechanical capabilities. rheological, thermomechanical, morphological properties 3D-printed PP/Si created using extrusion (MEX) 3D printing examined. Thermogravimetric analysis differential scanning calorimetry exploited study thermal stability phase transitions in composite materials. Mechanical testing conducted determine such as flexural tensile strength modulus elasticity. For detailed characterization nanocomposites, electron microscopy, Raman spectroscopy also performed. results provide insight impact Si properties, stability, rheological behavior composites. 2 wt% filler showed overall best performance improvement (21% elasticity, 15.7% strength, high values remaining assessed). nanocomposite maximum a 33.6% increased microhardness than pure PP thermoplastic, showing promising wear resistance parts built it. This research reveals ability improve characteristics PP-based compounds produced by MEX printing. Graphical

Language: Английский

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Deep eutectic solvent-assisted self-healing and anti-freezing composite hydrogels regulated by sodium phytate for wearable sensors

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2024, Volume and Issue: 686, P. 133346 - 133346

Published: Jan. 26, 2024

Language: Английский

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