Permalink Submitted by Eric Acome on Sun, In other projects Wikimedia Commons. We demonstrated that an actuator with a smaller electrode yields a larger force than an identical actuator with a larger electrode. As you can imagine, this system is very susceptible to fatigue. Actuators A , —  F. Again, the self-healing material we collaborated with Chao Wang on ref 20 above might be one possible material, plus this material has the added benefit of physical self-healing. History Glossary Wood lumber.
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The visors were used by hunters bebding were in kayaks. Wearable and Washable Conductors for Active Textiles. Developing thermoplastic elastomers with performance comparable to silicone rubbers would be great for making HASELs.
The capability to freely selectively bond materials beyond using a filler material to avoid it, like the injection of air as you have actively done so doesn’t seem present in the field just yet. I am personally not too worried about the safety aspect; after all, we constantly carry lithium ion batteries with us that can explode — I think the risk with well insulated and shielded HV actuators is lower than that.
For example, fatigue under cyclic loads must be an important consideration for soft robots used as grips. When you add oil in, the advantage you presented is the self-healing property.
We notably show that combining the effect of an hydroscopic salt and an elastomer coating can be a solution to create hydrogel devices that doesn’t dry benring in ambient air. Most 3D systems cannot print multiple materials, and have to use support structures made of the same material while printing with cavities, which remain inside permanently. This material is used to make air-tight chamber, and innerliner of tires. Permalink Submitted by KevinTian on Mon, After heat bending the wood, clamping the wood into a solid mold will reinforce the bends made to the wood while drying, preventing the wood from straightening while it dries.
Ecoflex is convenient for proof-of-concept devices, but there are other rubbers, such as butyl rubber a crosslinked polyisobutylenewhich have a permeability that is about a hundred times lower than Ecoflex. Hence, we resorted to using readily available materials to demonstrate the concepts.
Hi, Christoph, Thanks for such a wonderful and inspiring work. Permalink Submitted by Eric Acome on Fri, Simply sealing the hydrogel inside a polymer that is not permeable to water might allow the device to operate in a water environment.
Using hydrogel makes the overall device transparent. We think a use of a mechanically self-healing material such as we discussed in [19,20] and in our initial post above, might be very interesting for future work. The first possible solution may be to look for other transparent ionically conductive electrodes such as ionogels.
At higher humidity levels we have not observed any change in performance of the actuators.
The soft compliant material used and low material strain likely contributed to the very high lifetime. Here is a link: This makes it simple to heat-seal the pouches, similar to hot embossing, followed by filling with a liquid dielectric.
As Zhigang mentioned, you are our admire to push the idea so far!
Steam bending – Wikipedia
Lastly, it is highly possible instead of using ionic conductors, to operate HASELs with electronic conductors. Permalink Submitted by Christoph Keplinger on Thu, Thank you very much for the congratulations. Additional experimental testing and a better fundamental understanding of fatigue of soft and flexible materials would be useful for improving the long-term performance of HASEL actuators.
Figure reproduced from [ ii ].
Heartiest bendint to you all. The Maxwell stress induces a hydraulic pressure within the shell, which is independent of the electrode size. Permalink Submitted by Eric Acome on Mon, But the device cannot work in water environment.
This is true, if the electrodes came in contact with conductive material this would cause a short circuit. Tim great job AP.
We are already funded by a large car manufacturer to explore active surfaces based on HASELs, which could find use both inside and outside of the car.