Refreshable Tactile Display Based on a Bistable Electroactive Polymer and a Stretchable Serpentine Joule Heating Electrode
Refreshable Tactile Display Based on a Bistable Electroactive Polymer and a Stretchable Serpentine Joule Heating Electrode
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DOI：
10.1021/acsami.8b07020
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发表时间：
2018-07-25
影响因子：
9.5
通讯作者：
Pei, Qibing
中科院分区：
文献类型：
--
作者：
Qiu, Yu;Lu, Zhiyun;Pei, Qibing
随着触觉丰富了人机交互体验，对触觉交互设备的需求呈指数级增长。然而，迄今为止报道的触觉设备无法提供高质量的性能，紧凑的外形因素，以及相对简单的系统架构，以实现低成本生产。我们报道了使用双稳态电活性聚合物（BSEP）薄膜和蛇形碳纳米管电极制造出具有盲文标准分辨率的4 × 4气动触觉显示器。BSEP变刚度的材料,展品3000倍的刚度变化的狭窄的温度范围内43 + / - 3度C碳纳米管电极图案在聚合物薄膜通过P3R过程,Prestretch-Pattern-Protect-Release,导致serpentine-patterned复合电极是高度可伸缩的,保留了其高导电性,类似于200%区域应变,并提供一个快速焦耳加热31度C / s。触觉像素是隔膜致动器，可以单独控制，通过局部加热和气动压力产生0.7毫米的平面变形和大于50克的阻塞力。该设备可以在低电压供电（30 V）下工作，寿命超过10万次，性能不会下降太多。这项工作可以为构建紧凑、用户友好、成本效益高的触觉设备开辟一条道路，用于各种重要应用。
The demand for tactile interactive devices has been growing exponentially as the sense of touch enriches the human-machine interaction experience. However, the tactile devices reported so far cannot offer high-quality performance, compact form factor, and relatively simple system architecture for low-cost production. We report the fabrication of a 4 x 4 pneumatic tactile display with Braille standard resolution using a bistable electroactive polymer (BSEP) thin film and a serpentine-patterned carbon nanotube electrode. The BSEP is a variable stiffness material that exhibits a stiffness change of 3000-fold within the narrow temperature range of 43 +/- 3 degrees C. The carbon nanotube electrode was patterned on the polymer film via a P3R process, Prestretch-Pattern-Protect-Release, which leads to a serpentine-patterned composite electrode that is highly stretchable, retains its high electrical conductivity up to an similar to 200% area strain, and provides a fast Joule heating rate of 31 degrees C/s. The tactile pixels are diaphragm actuators that can be individually controlled to produce 0.7 mm out of plain deformation and greater than 50 g of blocking force by application of local heating and pneumatic pressure. The device can operate under low voltage supply (30 V) and has a lifetime of over 100 000 cycles without much performance degradation. This work could open a path to building compact, user-friendly, and cost-effective tactile devices for a variety of important applications.