Strain-Sensitive Performance of a Tough and Ink-Writable Polyacrylic Acid Ionic Gel Crosslinked by Carboxymethyl Cellulose
Strain-Sensitive Performance of a Tough and Ink-Writable Polyacrylic Acid Ionic Gel Crosslinked by Carboxymethyl Cellulose
复制标题
DOI：
10.1002/marc.201900329
复制
发表时间：
2019-10-01
影响因子：
4.6
通讯作者：
Sakai, Eiichi
中科院分区：
文献类型：
--
作者：
Jin, Shuping;Qiu, Jianhu;Sakai, Eiichi
以羧甲基纤维素为交联剂，KCl为导电离子给体，制备了坚韧的聚丙烯酸离子凝胶。聚合过程由硝酸铈铵引发，并由可见光引发，这可以作为一种简单的3D打印过程来制造任意的凝胶结构。卷曲的大分子交联剂和聚合物之间丰富的氢键赋予了离子凝胶上级的力学性能，包括高拉伸强度（约1.33 MPa）、大伸长率（>8倍）、高韧性（约5.11 MJ m（-3））和良好的自恢复性能。重要的是，离子凝胶可以组装成柔性应变传感器，通过记录电容变化来精确地监测真实的人体的各种运动，即关节弯曲和肌肉收缩。这种应变敏感的性能，即使在1000个连续的周期后也可以恢复，应该能够检测身体动作，并在医疗保健监测或人机用户界面中提供潜在的应用。
A tough polyacrylic acid ionic gel is obtained using carboxymethyl cellulose as a crosslinker and KCl as a conductive ions donor. The polymerization process is initiated by ceric ammonium nitrate and triggered by visible light, which can be employed as a facile 3D printing process to fabricate arbitrary gel architectures. Curling macromolecular crosslinker and plentiful hydrogen bonds among polymers endow the ionic gel with superior mechanical performance including high tensile strength (approximate to 1.33 MPa), large elongation (>8 times), high toughness (approximate to 5.11 MJ m(-3)), and good self-recovery property. Importantly, the ionic gel can be assembled into a flexible strain sensor to precisely monitor the diverse human body motions in real time, that is, joints bending and muscle contraction, by recording the capacitance variation. This strain-sensitive performance, which can recover even after 1000 successive cycles, should enable the detection of body action and provide a potential application in health-care monitoring or human-computer user interfaces.