Scalable manufacturing of fibrous nanocomposites for multifunctional liquid sensing
Scalable manufacturing of fibrous nanocomposites for multifunctional liquid sensing
复制标题
用于多功能液体传感的纤维纳米复合材料的规模化制造
DOI：
10.1016/j.nantod.2021.101270
复制
发表时间：
2021-08-18
期刊：
影响因子：
17.4
通讯作者：
Dichiara, Anthony B.
中科院分区：
文献类型：
--
作者：
Goodman, Sheila M.;Asensi Tortajada, Ignacio;Dichiara, Anthony B.
基于纤维素的纸电子产品是一种有吸引力的技术，以满足对天然丰富的、生物相容的、可生物降解的、柔性的、廉价的、轻质的和高度可降解的传感材料的日益增长的需求。工业碳纳米管（CNT）等级的价格降低为制造导电纸提供了机会，导电纸的电阻率对环境刺激（例如水或有机溶剂的存在）有响应。在这里，一个高度敏感的纸纳米复合材料的开发，通过整合碳纳米管到纸浆纤维和纳米原纤化纤维素的分层网络。由于CNT和纤维素组分之间的定制界面结合，水相动态成网工艺能够以最小的纳米颗粒损失规模化生产感官纸纳米复合材料。所得材料可用作多功能液体传感器，如泄漏检测和波动监测。即使经过30个周期和6个月的自然老化，由于分层纤维素网络的水膨胀，改变了相邻CNT之间的管间距离，对液态水的敏感性也跨越了出色的四个数量级。重新组织的碳纳米管修改的电子传输在潮湿地区的片材，这可以预测的电阻器的等效电路的快速检测和量化的各种液体在大的表面。(c)2021由Elsevier Ltd.出版
Cellulose-based paper electronics is an attractive technology to meet the growing demands for naturally abundant, biocompatible, biodegradable, flexible, inexpensive, lightweight and highly miniaturizable sensory materials. The price reduction of industrial carbon nanotube (CNT) grades offers opportunities to manufacture electrically conductive papers whose resistivity is responsive to environmental stimuli, such as the presence of water or organic solvents. Here, a highly sensitive paper nanocomposite is developed by integrating CNTs into a hierarchical network of pulp fibers and nanofibrillated cellulose. The aqueous-phase dynamic web forming process enables the scalable production of sensory paper nanocomposites with minimal nanoparticle loss due to the tailored interfacial bonding between CNT and cellulose components. The resulting materials are applied as multifunctional liquid sensors, such as leak detection and wave monitoring. The sensitivity to liquid water spans an outstanding four orders of magnitude even after 30 cycles and 6-month natural aging, due to the hydroexpansion of the hierarchical cellulose network, which alters the intertube distance between neighboring CNTs. The re-organization of percolated CNTs modifies the electron transport in wet areas of the sheet, which can be predicted by an equivalent circuit of resistors for the rapid detection and quantification of various liquids over large surfaces. (c) 2021 Published by Elsevier Ltd.