Experimental Investigation on the Effect of Graphene Oxide Additive on the Steady-State and Dynamic Shear Properties of PDMS-Based Magnetorheological Elastomer
| Autor: | Yanliang Qiao, Mei Zhang, Pengcheng Zhai, Jiangtao Zhang, Minzi Liu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Polymers and Plastics Rheometer steady-state shear Organic chemistry 02 engineering and technology 010402 general chemistry Elastomer 01 natural sciences Article Shear modulus chemistry.chemical_compound Carbonyl iron QD241-441 magnetorheological elastomers Composite material Polydimethylsiloxane General Chemistry 021001 nanoscience & nanotechnology Magnetorheological elastomer 0104 chemical sciences Shear (sheet metal) magnetorheological effect chemistry Magnetorheological fluid graphene oxide 0210 nano-technology dynamic shear property |
| Zdroj: | Polymers, Vol 13, Iss 1777, p 1777 (2021) Polymers Volume 13 Issue 11 |
| ISSN: | 2073-4360 |
| Popis: | Isotropic polydimethylsiloxane (PDMS)-based magnetorheological elastomers (MREs) filled with various contents of graphene oxide (GO) additive were fabricated by the solution blending-casting method in this work. The morphologies of the produced MREs were characterized, and the results indicate that the uniform distribution of GO sheets and carbonyl iron particles (CIPs) becomes difficult with the increase of GO content. The steady-state and dynamic shear properties of the MREs under different magnetic field strengths were evaluated using parallel plate rheometer. It was found that the physical stiffness effect of GO sheets leads to the increase of the zero-field shear modulus with increasing GO content under both the steady-state and dynamic shear loads. The chemical crosslinking density of PDMS matrix decreases with the GO content due to the strong physical crosslinking between GO and the PDMS matrix. Thus, the MREs filled with higher GO content exhibit more fluid-like behavior. Under the dynamic shear load, the absolute MR effect increases with the GO content due to the increased flexibility of the PDMS matrix and the dynamic self-stiffening effect occurring in the physical crosslinking interfaces around GO sheets. The highest relative MR effect was achieved by the MREs filled with 0.1 wt.% GO sheets. Then, the relative MR effect decreases with the further increase of GO content due to the improved zero-field modulus and the increased agglomerations of GO and CIPs. This study shows that the addition of GO sheets is a possible way to prepare new MREs with high MR effect, while simultaneously possessing high zero-field stiffness and load bearing capability. |
| Databáze: | OpenAIRE |
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