Zhang Hao, Sun Xiaohang, Hubbe Martin A, Pal Lokendra
Department of Materials and Chemical Engineering, Henan University of Engineering, Zhengzhou, Henan, 450000, PR China; Department of Forest Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, NC, 27695-8005, USA.
Department of Forest Biomaterials, North Carolina State University, Campus Box 8005, Raleigh, NC, 27695-8005, USA.
Carbohydr Polym. 2019 Oct 15;222:115013. doi: 10.1016/j.carbpol.2019.115013. Epub 2019 Jun 20.
Highly conductive multi-walled carbon nanotubes (MWCNTs) and flexible cellulose nanofibers (CNF) membranes with semi-interpenetrating networks structure were fabricated using the typical paper-making method, which was simple and cost-effective. The Scanning electron microscope (SEM), Fourier-transform infrared (FT-IR), and thermal gravimetric analysis (TGA) were used to estimate the morphology, chemical structure, and thermal stability of the membranes. The mechanical, optical, and electrical properties of the membranes were characterized with a uniaxial tensile testing machine, ultraviolet visible spectroscope, and digital multimeter, respectively. The results indicated that the membranes containing 10 wt% of MWCNTs showed a high conductivity value of 37.6 S/m, and the sheet resistances of the membranes were stable at different bending states. Furthermore, we demonstrated the electrical features of membrane-based capacitive pressure sensors based on CNF/MWCNTs. The proposed method for fabricating CNF/MWCNTs membranes can simplify the production process and have great practical potential in various electronics applications such as touch screens.
采用典型的造纸方法制备了具有半互穿网络结构的高导电性多壁碳纳米管（MWCNTs）和柔性纤维素纳米纤维（CNF）膜，该方法简单且成本效益高。利用扫描电子显微镜（SEM）、傅里叶变换红外光谱（FT-IR）和热重分析（TGA）来评估膜的形态、化学结构和热稳定性。分别用单轴拉伸试验机、紫外可见光谱仪和数字万用表对膜的力学、光学和电学性能进行了表征。结果表明，含有10 wt% MWCNTs的膜显示出37.6 S/m的高电导率值，并且在不同弯曲状态下膜的表面电阻稳定。此外，我们展示了基于CNF/MWCNTs的膜基电容式压力传感器的电学特性。所提出的制备CNF/MWCNTs膜的方法可以简化生产过程，并且在诸如触摸屏等各种电子应用中具有巨大的实际潜力。
