Large Scale Continuous Layer-by-Layer Assembly of Paper-based Nanocomposites for High Fidelity Multifunctional Sensors

用于高保真多功能传感器的纸基纳米复合材料的大规模连续层层组装

• 批准号: 1927623
• 负责人: ANTHONY DICHIARA
• 金额: $ 36万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-01 至 2023-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1927623&HistoricalAwards=false
• 关键词: Large; Scale; Continuous; Layer; Assembly

Paper is a ubiquitous material invented in ancient China comprising cellulose fibers tangled and twisted with each other forming a porous network. Today?s ever-digitalized world has spurred new interests in paper as a low-cost, sustainable, flexible, lightweight and biocompatible platform for portable electronics. This project will provide the framework for the incorporation of nanomaterials, such as carbon nanotubes (CNTs) and cellulose nanofibrils (CNFs), into fibrous networks, with the goal of enabling easy scale-up manufacturing of paper-based nanocomposites (PBC). The grant provides fundamental knowledge for the development of a continuous layer-by-layer assembly process, mimicking industrial papermaking, to manufacture strain sensors with electrical conductivity, enhanced strength and high sensitivity to external stimuli for multifunctional sensing applications. This novel process has the potential to reinvigorate the pulp and paper industry and benefit the U.S. economy and promote the progress of science by changing the way smart materials and electronic devices are manufactured and used for applications such as wearable devices, healthcare applications, structural monitoring systems, soft robotics, and electronic skins. The interdisciplinary approach encourages the participation of diverse individuals including women and underrepresented minority groups in engineering research and education. The layer-by-layer assembly of paper-based nanocomposites in a continuous web former can overcome several limitations existing multifunctional sensors have, ranging from cost, flexibility, durability, and mechanosensitivity. This fundamental study is to fill the knowledge gaps on interface tailoring for the incorporation of well-dispersed nanoparticles at high content into auxetic fiber networks, and on microcrack-assisted manipulation to control the disconnection-reconnection of percolated conductive structures in paper-based nanocomposites. Auxetic paper nanocomposites possess a negative Poisson's ratio, meaning they expand biaxially during stretching, in direct contrast to conventional materials, which endure transverse Poisson compression under tension. Bidirectional expansions in auxetic materials contribute to moving electrically conductive nanoparticles away from one another, thereby improving the sensitivity of stretchable resistive sensors. Numerical simulations are performed to understand the coupling between mechanical motion and electron transport in auxetic materials, while experimental research is conducted to verify the model, test the hypothesis that structural Poisson's ratio and strain concentration can be tailored to achieve ultrahigh mechanosensitivity, and establish process-structure-property relationships in paper-based multifunctional sensors.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

纸是中国古代发明的一种普遍存在的材料，其包括彼此缠结和扭曲形成多孔网络的纤维素纤维。今天吗？在日益数字化的世界中，纸作为便携式电子产品的低成本、可持续、灵活、轻质和生物相容性平台，激发了人们对纸的新兴趣。该项目将为将纳米材料（如碳纳米管（CNT）和纤维素纳米纤维（CNFs））纳入纤维网络提供框架，目标是实现纸基纳米复合材料（PBC）的简单规模化制造。该补助金为开发连续逐层组装工艺提供了基础知识，模仿工业造纸，以制造具有导电性，增强强度和对外部刺激高灵敏度的应变传感器，用于多功能传感应用。这种新工艺有可能重振纸浆和造纸工业，造福美国经济，并通过改变智能材料和电子设备的制造方式和用于可穿戴设备，医疗保健应用，结构监测系统，软机器人和电子皮肤等应用来促进科学进步。跨学科的方法鼓励不同的个人，包括妇女和代表性不足的少数群体参与工程研究和教育。纸基纳米复合材料在连续成网机中的逐层组装可以克服现有多功能传感器的几个限制，包括成本、灵活性、耐用性和机械敏感性。这项基础研究是为了填补知识空白的界面剪裁纳入良好分散的纳米粒子在高含量的拉胀纤维网络，并在微裂纹辅助操作，以控制断开-重连接的纸基纳米复合材料中的导电结构。磁性纸纳米复合材料具有负泊松比，这意味着它们在拉伸过程中双轴膨胀，与传统材料形成直接对比，传统材料在拉伸下承受横向泊松压缩。拉胀材料中的双向膨胀有助于使导电纳米颗粒远离彼此移动，从而提高可拉伸电阻传感器的灵敏度。 通过数值模拟来理解拉胀材料中机械运动和电子输运之间的耦合，同时进行实验研究来验证模型，检验结构泊松比和应变集中可以被定制以实现拉胀材料的机械敏感性的假设，并在纸张中建立工艺-结构-性能关系-该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Scalable manufacturing of fibrous nanocomposites for multifunctional liquid sensing

• DOI: 10.1016/j.nantod.2021.101270
• 发表时间: 2021-08-18
• 期刊: NANO TODAY
• 影响因子: 17.4
• 作者: Goodman, Sheila M.;Asensi Tortajada, Ignacio;Dichiara, Anthony B.
• 通讯作者: Dichiara, Anthony B.

Capacitive eye tracker made of fractured carbon nanotube-paper composites for wearable applications

由断裂碳纳米管纸复合材料制成的电容式眼动仪，用于可穿戴应用

• DOI: 10.1016/j.sna.2022.113739
• 发表时间: 2022
• 期刊: Sensors and Actuators A: Physical
• 作者: Sakthivelpathi, Vigneshwar;Qian, Zhongjie;Li, Tianyi;Ahn, Sanggyeun;Dichiara, Anthony B.;Soetedjo, Robijanto;Chung, Jae-Hyun
• 通讯作者: Chung, Jae-Hyun

Water-processable cellulosic nanocomposites as green dielectric films for high-energy storage

可水处理的纤维素纳米复合材料作为高能量存储的绿色介电薄膜

• DOI: 10.1016/j.ensm.2022.03.047
• 发表时间: 2022
• 期刊: Energy Storage Materials
• 影响因子: 20.4
• 作者: Goodman, Sheila M.;Che, Junjin;Neri, Wilfrid;Yuan, Jinkai;Dichiara, Anthony B.
• 通讯作者: Dichiara, Anthony B.

Electromechanical coupling of isotropic fibrous networks with tailored auxetic behavior induced by water-printing under tension

• DOI: 10.1039/d0tc05526c
• 发表时间: 2021-03
• 期刊: Journal of Materials Chemistry C
• 影响因子: 6.4
• 作者: Jinyuan Zhang;Sheila M. Goodman;Heather G. Wise;Anthony B. Dichiara;J. Chung

Simultaneous multiparameter whole blood hemostasis assessment using a carbon nanotube-paper composite capacitance sensor

• DOI: 10.1016/j.bios.2021.113786
• 发表时间: 2021-11-18
• 期刊: BIOSENSORS & BIOELECTRONICS
• 影响因子: 12.6
• 作者: Sekar, Praveen K.;Liang, Xin M.;Gao, Dayong
• 通讯作者: Gao, Dayong