Artificial muscles for wearable assistance and rehabilitation
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Traditional exoskeletons have made considerable contributions to people in terms of providing wearable assistance and rehabilitation. However, exoskeletons still have some disadvantages, such as being heavy, bulky, stiff, noisy, and having a fixed center of rotation that can be a burden on elders and patients with weakened muscles. Conversely, artificial muscles based on soft, smart materials possess the attributes of being lightweight, compact, highly flexible, and have mute actuation, for which they are considered to be the most similar to natural muscles. Among these materials, dielectric elastomer (DE) and polyvinyl chloride (PVC) gel exhibit considerable actuation strain, high actuation stress, high response speed, and long life span, which give them great potential for application in wearable assistance and rehabilitation. Unfortunately, there is very little research on the application of these two materials in these fields. In this review, we first introduce the working principles of the DE and PVC gel separately. Next, we summarize the DE materials and the preparation of PVC gel. Then, we review the electrodes and self-sensing systems of the two materials. Lastly, we present the initial applications of these two materials for wearable assistance and rehabilitation.
Key wordsArtificial muscle Smart material Dielectric elastomers (DE) Polyvinyl chloride (PVC) gel Actuator Wearable assistance Rehabilitation
CLC numberTB332 TP271
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- Bar-Cohen Y, Cardoso VF, Ribeiro C, et al., 2017. Electroactive polymers as actuators. In: Uchino K (Ed.), Advanced Piezoelectric Materials: Science and Technology. Elsevier, Amsterdam, p.319–352. https://doi.org/10.1016/B978-0-08-102135-4.00008-4 Google Scholar
- Cheng X, Yang WM, Zhang YC, et al., 2018b. Understanding the electro-stimulated deformation of PVC gel by in situ Raman spectroscopy. Polym Test, 65:90–96. https://doi.org/10.1016/j.polymertesting.2017.11.013 Google Scholar
- Park WH, Bae JW, Shin EJ, et al., 2016. Development of a flexible and bendable vibrotactile actuator based on wave-shaped poly (vinyl chloride)/acetyl tributyl citrate gels for wearable electronic devices. Smart Mater Struct, 25(11):115020. https://doi.org/10.1088/0964-1726/25/11/115020 Google Scholar
- Pourazadi S, Ahmadi S, Menon C, 2015. On the design of a DEA-based device to pot entially assist lower leg disorders: an analytical and FEM investigation accounting for nonlinearities of the leg and device deformations. Biomed Eng OnLine, 14(1):103. https://doi.org/10.1186/s12938-015-0088-3 Google Scholar
- Romasanta LJ, López-Manchado MA, Verdejo R, 2015. Increasing the performance of dielectric elastomer actuators: a review from the materials perspective. Prog Polym Sci, 51:188–211. https://doi.org/10.1016/j.progpolymsci.2015.08.002 Google Scholar