Flexible and Pressure-Responsive Sensors from Cellulose Fibers Coated with Multiwalled Carbon Nanotubes

被引:48
作者
Zhang, Hao [1 ,2 ]
Sun, Xiaohang [2 ]
Hubbe, Martin Allen [2 ]
Pal, Lokendra [2 ]
机构
[1] Henan Univ Engn, Dept Mat & Chem Engn, Zhengzhou 450000, Henan, Peoples R China
[2] North Carolina State Univ, Dept Forest Biomat, Campus Box 8005, Raleigh, NC 27695 USA
来源
ACS APPLIED ELECTRONIC MATERIALS | 2019年 / 1卷 / 07期
基金
美国国家科学基金会;
关键词
pressure sensors; cellulose; carbon nanotubes; interlaced networks; water bath process; hybrid electronics; TRIBOELECTRIC NANOGENERATORS; HIGH-PERFORMANCE; FLAME-RETARDANT; STRAIN SENSORS; OXYGEN PLASMA; FILMS; COMPOSITES; ENERGY; FABRICATION; NANOFIBERS;
D O I
10.1021/acsaelm.9b00182
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Composite cellulose-based materials have shown increasing potential in wearable and flexible hybrid electronics for large-scale deployment because of their flexible, cost-effective, abundant, and biodegradable features. A flexible cotton cellulose-incorporated multiwalled carbon nanotube (MVVCNT) based pressure sensor was fabricated. First, the cotton cellulose fibers were swelled in water solution containing sodium hydroxide and urea. Second, the MWCNTs were dispersed uniformly in the cellulosic matrix. Then, cellulosic pressure sensors were formed with a water bath process. The porous and interlaced conductive networks in the pressure sensors containing 10 wt % of MWCNTs exhibited a sensitivity about of -0.0197 kPa(-1), a response time of about 20 ms, a recovery time of about 20 ms, and a wide workable pressure range from 0 to 20 kPa. Further, the practical piezoresistivity of sensor specimens was investigated. The proposed pressure sensors are prospective for various applications including smart clothing, electronic skins, medical diagnosis, and treatment.
引用
收藏
页码:1179 / 1188
页数:19
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