期刊
ACS NANO
卷 12, 期 5, 页码 4583-4593出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.8b00997
关键词
MXene; cellulose nanofibers; paper; mechanical properties; electromagnetic interference shielding
类别
资金
- National Natural Science Foundation of China [31771081, 51472259]
- Fundamental Research Funds for the Central Universities [2015ZCQ-CL-03]
- Science and Technology Commission of Shanghai [15JC1491001]
- Youth Innovation Promotion Association of Chinese Academy of Sciences [2015203]
With the growing popularity of electrical communication equipment, high-performance electromagnetic interference (EMI) shielding materials are widely used to deal with radiation pollution. However, the large thickness and poor mechanical properties of many EMI shielding materials usually limit their applications. In this study, ultrathin and highly flexible Ti3C2Tx (d-Ti3C2Tx,, MXene)/cellulose nanofiber (CNF) composite paper with a nacre-like lamellar structure is fabricated via a vacuum-filtration-induced self-assembly process. By the interaction between one-dimensional (1D) CNFs and two-dimensional (2D) d-Ti3C2Tx MXene, the binary strengthening and toughening of the nacre-like d-Ti3C2Tx/CNF composite paper has been successfully achieved, leading to high tensile strength (up to 135.4 MPa) and fracture strain (up to 16.7%), as well as excellent folding endurance (up to 14 260 times). Moreover, the d-Ti3C2Tx/CNF composite paper exhibits high electrical conductivity (up to 739.4 S m(-1)) and excellent specific EMI shielding efficiency (up to 2647 dB cm(2) g(-1)) at an ultrathin thickness (minimum thickness 47 mu m). The nacre-inspired strategy in this study offers a promising approach for the design and preparation of the strong integrated and flexible MXene/CNF composite paper, which may be applied in various fields such as flexible wearable devices, weapon equipment, and robot joints.
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