School of Materials Science and Engineering, Key Laboratory of Advanced Civil Materials of Ministry of Education , Tongji University , Shanghai 201804 , People's Republic of China.
ACS Appl Mater Interfaces. 2019 Oct 30;11(43):40620-40628. doi: 10.1021/acsami.9b14040. Epub 2019 Oct 17.
The artificial skin-like stretchable ionic sensor device usually requires a synergistic effect of reliable adhesion between human machine interface, reasonable mechanical strength, and visually displayable transparency. A plant-inspired zwitterionic hydrogel was prepared through rapid UV initiation in the existence of cellulose nanocrystals as physically crosslinker and reinforcing agent. The resulting transparent zwitterionic nanocomposite hydrogel successfully brings the synergistic advantages of robust adhesive strength between diversified substrates such as skins, plastics, glass, and steels with remarkable mechanical properties of a superior stretchability over 1000% strain, a mechanical tensile strength up to 0.61 MPa, and compressive strength up to 7.5 MPa, manifesting in superior ionic transport performance, simultaneously. Furthermore, the zwitterionic nanocomposite hydrogel was fabricated as a wearable compliant stretchable pressure-strain sensor in the modality of the skin-adhesive patch to be sensitive to human motion such as finger touch and speech recognition for personal healthcare of patient sensory rebuilding and physiological data acquisition. It maintains compressive cycling sensibility at diverse pressure during 0.5, 1.0, and 1.5 Hz, respectively. The multifunctional zwitterionic nanocomposite hydrogel could also be assembled into flexible electrical devices such as luminescent display and information transfer between human and robot communication for mechanosensory electronics and artificial intelligence.
人工皮肤般的可拉伸离子传感器装置通常需要人机界面之间可靠的粘附力、合理的机械强度和可视的透明性的协同效应。本研究通过在纤维素纳米晶作为物理交联剂和增强剂的存在下快速紫外引发，制备了一种仿植物两性离子水凝胶。所得透明两性离子纳米复合水凝胶成功地带来了与多种基底（如皮肤、塑料、玻璃和钢）之间强大的粘附力的协同优势，同时具有优异的机械性能，拉伸率超过 1000%，拉伸强度高达 0.61 MPa，压缩强度高达 7.5 MPa，表现出优异的离子传输性能。此外，两性离子纳米复合水凝胶被制备为一种可穿戴的顺应性可拉伸压力-应变传感器，以皮肤贴片的形式贴合，能够敏感地感知人类运动，如手指触摸和语音识别，用于患者的感官重建和生理数据采集等个人健康护理。它在 0.5、1.0 和 1.5 Hz 时分别保持在不同压力下的压缩循环敏感性。多功能两性离子纳米复合水凝胶还可以组装成柔性电子设备，如发光显示器和人机通信之间的信息传输，用于机械感觉电子学和人工智能。
