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Bio-Inspired All-Organic Soft Actuator Based on a π-π Stacked 3D Ionic Network Membrane and Ultra-Fast Solution Processing

机译:基于π-π堆叠3D离子网络膜和超快速溶液处理的生物启发式全有机软执行器

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摘要

Next generation electronic products, such as wearable electronics, flexible displays, and smart mobile phones, will require the use of unprecedented electroactive soft actuators for haptic and stimuli-responsive devices and space-saving bio-mimetic actuation. Here, a bio-inspired all-organic soft actuator with a π-π stacked and 3D ionic networked membrane based on naphthalene-tetracarboxylic dianhydride (Ntda) and sulfonated polyimide block copolymers (SPI) is presented, utilizing an ultra-fast solution process. The π-π stacked and self-assembled 30 ionic networked membrane with continuous and interconnected ion transport nanochannels is synthesized by introducing simple and strong atomic level regio-specific interactions of hydrophilic and hydrophobic SPI co-blocks with cations and anions in the ionic liquid. Furthermore, a facile and ultrafast all-solution process involving solvent blending, dry casting, and solvent dropping is developed to produce electro-active soft actuators with highly conductive polyethylenedioxythio-phene (PEDOT):polystyrenesulfbnate (PSS) electrodes. Ionic conductivity and ion exchange capacity of the π-π stacked Ntda-SPI membrane can be increased up to 3.1 times and 3.4 times of conventional SPI, respectively, resulting in a 3.2 times larger bending actuation. The developed bio-inspired soft actuator is a good candidate for satisfying the tight requirements of next generation soft electronic devices due to its key benefits such as low operating voltage and comparatively large strains, as well as quick response and facile processability.
机译:下一代电子产品,例如可穿戴电子设备,柔性显示器和智能手机,将需要为触觉和刺激响应设备以及节省空间的仿生生物致动使用前所未有的电活性软致动器。在此,利用超快溶液法,提出了一种具有生物启发性的全有机软致动器,其具有基于萘四甲酸二酐(Ntda)和磺化聚酰亚胺嵌段共聚物(SPI)的π-π堆叠和3D离子网络膜。通过在离子液体中引入亲水性和疏水性SPI共嵌段与阳离子和阴离子的简单且强原子级的区域特异性相互作用,来合成具有连续且相互连接的离子传输纳米通道的π-π堆叠和自组装30离子网络膜。此外,还开发了一种简便,超快的全溶液工艺,其中涉及溶剂共混,干法浇铸和滴落溶剂,以生产具有高导电性聚乙烯二氧噻吩(PEDOT):聚苯乙烯磺酸盐(PSS)电极的电活性软致动器。 π-π堆叠Ntda-SPI膜的离子电导率和离子交换容量可以分别提高到传统SPI的3.1倍和3.4倍,从而导致弯曲驱动力大3.2倍。由于具有诸如低工作电压和相对较大的应变以及快速响应和便捷的可加工性等关键优势,因此开发的生物启发式软致动器是满足下一代软电子设备的严苛要求的理想选择。

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  • 来源
    《Advanced Functional Materials》 |2014年第38期|6005-6015|共11页
  • 作者单位

    School of Mechanical Aerospace and Systems Engineering Korea Advanced Institute of Science and Technology (KAIST) 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea;

    School of Mechanical Aerospace and Systems Engineering Korea Advanced Institute of Science and Technology (KAIST) 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea;

    School of Mechanical Systems Engineering Chonnam National University 300 Yongbong-dong, Buk-gu, Gwang-Ju 500-757, Republic of Korea;

    School of Mechanical Aerospace and Systems Engineering Korea Advanced Institute of Science and Technology (KAIST) 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea;

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