羧基碳纳米管/细菌纤维素协同构建的高导电性、高韧性PAM复合水凝胶用于柔性电子皮肤

IF 4.8 2区 工程技术 Q1 MATERIALS SCIENCE, PAPER & WOOD
Jie Ren, Shijie Zeng, Xu Xiang
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引用次数: 0

摘要

导电水凝胶是一种柔性电子材料,越来越多地用于可穿戴设备、健康监测和电子皮肤。然而,它们有限的机械强度和导电性目前限制了更广泛的应用,需要改进。在这里,我们将细菌纤维素(BC)和羧化碳纳米管(carboxyl-CNT)与丙烯酰胺结合,制备了复合水凝胶(CBPam水凝胶)。这些组分之间的物理相互作用,包括氢键和物理纠缠,赋予水凝胶优异的拉伸性能(CBPam-1的最大应变为602%)。同时,羧基碳纳米管的加入提高了复合水凝胶的电导率(CBPam-1的电导率为11.6 mS/m)。在BC和羧基碳纳米管的协同作用下,用该复合水凝胶制备的传感器具有优异的应变敏感性。在0 ~ 200%应变范围内,测量因子(GF)为2.70,响应时间非常短(约200 ms)。值得注意的是,这种复合水凝胶还可以在电容屏上自由书写,进一步扩大了其作为柔性可穿戴设备的应用范围。基于CBPam水凝胶优异的力学性能和导电性能,该材料制成的传感器能够灵敏稳定地检测人体活动并辅助实现输出,在可穿戴设备、仿人机器人等领域具有良好的应用潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Highly conductive and tough PAM composite hydrogel synergistically constructed by carboxyl carbon nanotubes/bacterial cellulose for flexible electronic skin

Conductive hydrogels, a flexible electronic material, are increasingly used in wearables, health monitoring, and electronic skin. However, their limited mechanical strength and conductivity currently restrict broader applications and require enhancement. Here, we incorporated bacterial cellulose (BC) and carboxylated carbon nanotubes (carboxyl-CNT) with acrylamide to prepare a composite hydrogel (CBPam Hydrogel). The physical interactions among these components, including hydrogen bonds and physical entanglement, endow the hydrogel with excellent tensile properties (maximum strain of CBPam-1: 602%). Meanwhile, the addition of carboxyl-CNT enhances the electrical conductivity of the composite hydrogel (conductivity of CBPam-1: 11.6 mS/m). Under the synergistic effect of BC and carboxyl-CNT, sensors fabricated with this composite hydrogel exhibit excellent strain sensitivity. At strains ranging from 0 to 200%, the gauge factor (GF) is 2.70, and the response time is remarkably short (approximately 200 ms). It is noteworthy that this composite hydrogel can also be freely written on capacitive screens, further expanding its application scope as a flexible wearable device. Based on the excellent mechanical and conductive properties of the CBPam Hydrogel, sensors based on this material can sensitively and stably detect human activities and assist in achieving output, indicating its good application potential in fields such as wearable devices and humanoid robots.

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来源期刊
Cellulose
Cellulose 工程技术-材料科学:纺织
CiteScore
10.10
自引率
10.50%
发文量
580
审稿时长
3-8 weeks
期刊介绍: Cellulose is an international journal devoted to the dissemination of research and scientific and technological progress in the field of cellulose and related naturally occurring polymers. The journal is concerned with the pure and applied science of cellulose and related materials, and also with the development of relevant new technologies. This includes the chemistry, biochemistry, physics and materials science of cellulose and its sources, including wood and other biomass resources, and their derivatives. Coverage extends to the conversion of these polymers and resources into manufactured goods, such as pulp, paper, textiles, and manufactured as well natural fibers, and to the chemistry of materials used in their processing. Cellulose publishes review articles, research papers, and technical notes.
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