Ultra‐Thin and Conformable Electrodes Composed of Single‐Walled Carbon Nanotube Networks for Skin‐Contact Dielectric Elastomer Actuators
Ultra‐Thin and Conformable Electrodes Composed of Single‐Walled Carbon Nanotube Networks for Skin‐Contact Dielectric Elastomer Actuators
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由单壁碳纳米管网络组成的超薄适形电极，用于皮肤接触介电弹性体致动器
DOI：
10.1002/aelm.202200165
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发表时间：
2022
影响因子：
6.2
通讯作者：
Fujie Toshinori
中科院分区：
文献类型：
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作者：
Horii Tatsuhiro;Okada Kei;Fujie Toshinori
皮肤接触介电弹性体致动器（DEA）由皮肤贴合的可拉伸电极组成，使用基于卷对卷的凹版涂布方法制造。在该方法中，将单壁碳纳米管（SWCNT）连续施加在聚（苯乙烯-B-丁二烯-B-苯乙烯）（SBS）的自立式超薄膜（纳米片）上以产生101 nm厚度的SWCNT-SBS纳米片。在第一次SWCNT涂覆之后，SWCNT-SBS纳米片显示出杨氏模量（即，80.9 MPa），薄层电阻为4.6 kΩ sq-1。使用独立的SWCNT-SBS纳米片作为电极，在没有胶水或介电弹性体前体的情况下，在具有不同刚度的三种基底上制造了十层DEA，即玻璃、Ecoflex 00-30和聚氨酯弹性体模型皮肤。十层DEA的低抗弯刚度（105 nN m）确保了食指形状的贴合性。施加2100 V的致动电压在Ecoflex 00-30基板上产生的DEA位移是在玻璃基板上的两倍。DEA贴合皮肤表面的能力将使其能够应用于皮肤接触触觉器械。
Skin‐contact dielectric elastomer actuators (DEAs) consisting of skin‐conformable, stretchable electrodes are fabricated using a roll‐to‐roll‐based gravure coating method. In this method, single‐walled carbon nanotubes (SWCNTs) are continuously applied on a free‐standing ultra‐thin film (nanosheet) of poly(styrene‐b‐butadiene‐b‐styrene) (SBS) to produce an SWCNT‐SBS nanosheet of 101‐nm thickness. After the first SWCNT coating, the SWCNT‐SBS nanosheet shows a Young's modulus (i.e., 80.9 MPa) comparable to that of the SBS film and a sheet resistance of 4.6 kΩ sq−1. Using the free‐standing SWCNT‐SBS nanosheets as electrodes, a ten‐layered DEA is fabricated without glue or dielectric elastomer precursors on three substrates with different stiffness, namely glass, Ecoflex 00–30, and a urethane elastomer model skin. The low flexural rigidity of the ten‐layered DEA (105 nN m) ensures conformability to the shape of an index finger. Application of an actuation voltage of 2100 V produces a two‐fold larger displacement of the DEA on the Ecoflex 00–30 substrate compared with that on the glass substrate. The ability of the DEA to conform to the surface of skin will enable its application in skin‐contact haptic devices.