Smart elastomeric hydrogel of polyacrylamide containing nanosized barium ferrite and graphene oxide
| Autor: | Rudra Kumar, Dipak Kumar Setua, Bablu Mordina, Ashutosh Sharma |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Graphene Mechanical Engineering Polyacrylamide Oxide Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Elastomer 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound chemistry Mechanics of Materials Ferrimagnetism law Self-healing hydrogels Materials Chemistry Ceramics and Composites Composite material 0210 nano-technology Barium ferrite |
| Zdroj: | Journal of Composite Materials. 53:3139-3156 |
| ISSN: | 1530-793X 0021-9983 |
| Popis: | Smart elastomeric hydrogels based on polyacrylamide containing ferrimagnetic nanoparticles of BaFe12O19 alone or a combination of BaFe12O19 and graphene oxide were synthesized. An improvised sample preparation technique was evolved to design actuators, where the hydrogel samples in rolls form were inserted into cut pieces of hard plastic sleeve in order to fabricate a lab-level actuator. The magneto-responsive actuation behaviour was measured by applying an external magnetic field with the help of a hand-held square type of NdFeB magnet. While the sample containing only 20 wt% BaFe12O19 exhibited only 15 mm deflection at threshold magnetic field of 28 mT, the deflection was significantly enhanced up to 23 mm for the sample containing 1 wt% GO and 20 wt% BaFe12O19 at a threshold magnetic field of 36.7 mT. Up to 20 wt% BaFe12O19, the hydrogels showed a heterogeneous dispersion of large-sized BaFe12O19 clusters and addition of a small percentage, e.g. 1% of GO resulted in significant improvement in the homogeneity of dispersion as well as reduction of the scale of the BaFe12O19 clusters. The saturation magnetization value of the hydrogels was also improved by 50–75% due to the addition of 1 wt% GO with 20 wt% BaFe12O19. |
| Databáze: | OpenAIRE |
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