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Synthesis and characterization of gelatin-based hybrid magnetic hydrogels
•Hybrid magnetic hydrogels having more than one kind of magnetic particle are synthesized.•Composition-based alteration of soft and hard magnetic properties of the hydrogels.•Novel hydrogels are subjected to mechanical and magnetic loading.•Hydrogels’ responses to magnetic stimuli can be programmed...
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Published in: | Materials letters 2023-08, Vol.345, p.134480, Article 134480 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | •Hybrid magnetic hydrogels having more than one kind of magnetic particle are synthesized.•Composition-based alteration of soft and hard magnetic properties of the hydrogels.•Novel hydrogels are subjected to mechanical and magnetic loading.•Hydrogels’ responses to magnetic stimuli can be programmed via hybrid hydrogels.
Gelatin-based magnetic hydrogels are composed of gelatin polymer, water, and magnetic nanoparticles. The properties of embedded nano-particles, such as coercivity and remanent magnetization, play an essential role while designing hydrogels for specific applications such as soft robotic tentacles, which can be used in minimally invasive surgery (e.g., catheters and endoscopes). The effective properties of the magnetic hydrogels can be tuned by combining various soft and hard magnetic nanoparticles. In the present work, carbonyl iron and strontium hexaferrite are used to prepare the hybrid hydrogels. The magnetization response (m-h curve) of the hydrogels is experimentally obtained, and the results confirm that the hydrogels’ effective properties are dependent on the embedded particles. Furthermore, experimental compression tests confirm that the stiffness of the hybrid hydrogels (75 kPa) is higher than the pure hydrogels (16.5 kPa). Subsequently, the strain developed in the hydrogels under the magnetic field is measured using the digital image correlation (DIC) method. Thus, the present study provides useful insights into synthesizing soft and hard magnetic hydrogels with customized magnetic and mechanical properties. |
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ISSN: | 0167-577X 1873-4979 |
DOI: | 10.1016/j.matlet.2023.134480 |