Ionoskins: Nonvolatile, Highly Transparent, Ultrastretchable Ionic Sensory Platforms for Wearable Electronics
Ionoskins: Nonvolatile, Highly Transparent, Ultrastretchable Ionic Sensory Platforms for Wearable Electronics
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DOI：
10.1002/adfm.201907290
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发表时间：
2019-11-20
影响因子：
19
通讯作者：
Moon, Hong Chul
中科院分区：
文献类型：
--
作者：
Kim, Yong Min;Moon, Hong Chul
下一代可穿戴电子产品的主要技术是追求高度可变形和稳定的系统的发展。本文提出了一种基于聚合物凝胶[聚甲基丙烯酸甲酯-丙烯酸丁酯]、PMMA-r-PBA]和离子液体（IL）的非挥发性、高透明和超可拉伸的离子导体。聚合物凝胶的分子设计中的一个关键策略是PMMA和il不溶性低玻璃化转变温度（T-g）聚合物的共聚，这种聚合物可以变形并有效地消散施加的应变。通过合理调整聚合物凝胶的分子特性和凝胶成分，可以获得高拉伸性（延伸极限约为850%）、机械坚固性（弹性模量约为3.1 x 10(5) Pa）和变形耐久性（500次拉伸/释放循环后的回复率约为96.1%）的凝胶。通过直接连接可拉伸凝胶和数字万用表，制作了一个非常简单的“离子”应变传感平台，具有高灵敏度（测量因子接近2.73），稳定运行（> 13000循环）和非挥发性（>在空气中10天）。此外，皮肤型应变传感器，称为离子皮肤，被证明。凝胶附着在身体的一部分（例如，手指、肘部、膝盖或脚踝），并且成功地监测各种人体运动。离子皮为实现可穿戴的无处不在的电子产品，如医疗设备和智能纺织系统提供了机会。
The primary technology of next-generation wearable electronics pursues the development of highly deformable and stable systems. Here, nonvolatile, highly transparent, and ultrastretchable ionic conductors based on polymeric gelators [poly(methyl methacrylate-ran-butyl acrylate), PMMA-r-PBA] and ionic liquids (IL) are proposed. A crucial strategy in the molecular design of polymer gelators is copolymerization of PMMA and IL-insoluble low glass transition temperature (T-g) polymers that can be deformed and effectively dissipate applied strains. Highly stretchable (elongation limit approximate to 850%), mechanically robust (elastic modulus approximate to 3.1 x 10(5) Pa), and deformation durable (recovery ratio approximate to 96.1% after 500 stretching/releasing cycles) gels are obtained by judiciously adjusting the molecular characteristics of polymer gelators and gel composition. An extremely simple "ionic" strain sensory platform is fabricated by directly connecting the stretchable gel and a digital multimeter, exhibiting high sensitivity (gauge factor approximate to 2.73), stable operation (>13 000 cycles), and nonvolatility (>10 d in air). Moreover, the skin-type strain sensor, referred to as ionoskin, is demonstrated. The gels are attached to a part of the body (e.g., finger, elbow, knee, or ankle) and various human movements are successfully monitored. The ionoskin renders the opportunity to achieve wearable ubiquitous electronics such as healthcare devices and smart textile systems.