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Addressable, Stretchable Heating Silicone Sheets
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DOI：10.1002/admt.201900276.png)
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Abstract
En 中文
Research into new active materials for soft robots has generated promising new thermally responsive materials for functions such as variable stiffness, on-demand shape change, and actuation. These new thermally responsive materials require a form of addressable thermal control that is compliance-matched to its host system. In response to this need, this work presents stretchable, addressable heating silicone sheets that can control soft, thermally responsive materials. The sheets are created using layer-by-layer deposition of a bulk conductive elastomer that can be Joule heated, with embedded liquid-metal microchannels used as electrodes. This combination allows the bulk, addressed material to be stretched and twisted while in operation. Local, addressable heating is demonstrated in a silicone-based composite that is capable of cyclic strains of up to 40%, while still self-heating to over 100 degrees C. The heating sheets are demonstrated as a thermal control platform in both color changing and stretch-and-hold operations using all silicone-based composites. Additionally, this platform is bonded to a variable-stiffness polymer that, with its selective heating capability, enables folding at targeted locations.
Keywords:
local thermal control
stretchable conductive composites
stretchable heaters
variable stiffness systems
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