用于可穿戴压力传感器的 3D 打印木质素碳化纳米管和纤维素纳米纤维气凝胶

IF 8.3 1区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES
Xiaoqing Du , Qi Chen , Qiqi Zhou , Yufan Zhou , Feng Wang , Wangjie Xu , Yulin Zhan , Man Jiang
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引用次数: 0

摘要

纳米纤维素是导电三维气凝胶传感器的重要可持续性和化学稳定性候选材料,而引入额外的导电添加剂则是必要的。在此,我们采用实验室开发的木质素衍生碳化纳米管(LCNT)作为导电成分,通过三维打印技术制备了基于纤维素纳米纤维(CNF)的复合气凝胶。具体而言,制备出的 LCNT/CNF 复合气凝胶的重量比为 85:15,呈现出均匀的多孔形态,LCNT 在 CNF 多孔基质中充分分散和渗透,提供了一种压阻式压力传感器。在 0.2 至 9.8 kPa 的测试范围内均可获得稳定的信号,响应时间在 100 至 200 ms 之间,这与测试精度有关。所制备的复合气凝胶的机械性能令人满意。在 30% 的恒定压缩应变下循环 1000 次,应力保持率为 92.5%,极限应力为 16.64 kPa。这项研究提供了一种完全由纤维素和木质素可再生天然聚合物制成的定制可穿戴压力传感器,其综合性能令人满意。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

3D printing lignin carbonized nanotube and cellulose nano fiber aerogel for wearable pressure sensors

3D printing lignin carbonized nanotube and cellulose nano fiber aerogel for wearable pressure sensors
The nanocellulose represents an important sustainability and chemical stability candidate for conductive 3D aerogel sensors, while introducing additional conductive additives is necessary. Herein, the as developed lignin derived carbonized nanotube (LCNT) in our lab was adopted as conductive ingredient to fabricate cellulose nanofiber (CNF) based composite aerogel by 3D printing. Specifically, the as-prepared LCNT/CNF composite aerogel with ratio of 85:15 in weight presented homogeneous porous morphology with well dispersed and penetrated LCNT in CNF porous matrix, providing a piezoresistive type pressure sensor. Stable signals were achieved under testing range from 0.2 to 9.8 kPa, with response time between 100 and 200 ms, related to the testing accuracy. The mechanical property of the as-prepared composite aerogel was found to be satisfactory. Under a constant 30 % compression strain for 1000 cycles, 92.5 % stress retention was maintained, and the ultimate stress was tested to be 16.64 kPa. This work provided a customized wearable pressure sensor with satisfactory comprehensive performance made completely from cellulose and lignin renewable natural polymers.
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来源期刊
Composites Science and Technology
Composites Science and Technology 工程技术-材料科学:复合
CiteScore
16.20
自引率
9.90%
发文量
611
审稿时长
33 days
期刊介绍: Composites Science and Technology publishes refereed original articles on the fundamental and applied science of engineering composites. The focus of this journal is on polymeric matrix composites with reinforcements/fillers ranging from nano- to macro-scale. CSTE encourages manuscripts reporting unique, innovative contributions to the physics, chemistry, materials science and applied mechanics aspects of advanced composites. Besides traditional fiber reinforced composites, novel composites with significant potential for engineering applications are encouraged.
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