Multifunctional Waterborne Polyurethane Nanocomposite Films with Remarkable Electromagnetic Interference Shielding, Electrothermal and Solarthermal Performances

To impart polymers with high electrical conductivity and satisfactory electromagnetic interference shielding efficiency, it is crucial to efficiently construct interconnecting networks of conductive nanofillers in polymer matrices. Herein, on the basis of the three-dimensional (3D) skeleton and volu...

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Bibliographic Details
Published in:Chinese journal of polymer science 2023-02, Vol.41 (2), p.267-277
Main Authors: Xu, Ming-Ke, Luo, Xin-Jie, Zhang, Hao-Bin, Zhang, Yu, Li, Lulu, Zhou, Xin-Feng, Yu, Zhong-Zhen
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Electrical resistivity
Electromagnetic interference
Electromagnetic shielding
Industrial Chemistry/Chemical Engineering
Nanocomposites
Ohmic dissipation
Polymer Sciences
Polyurethane resins
Portable equipment
Research Article
Resistance heating
Superhigh frequencies
Zinc oxide
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Summary:To impart polymers with high electrical conductivity and satisfactory electromagnetic interference shielding efficiency, it is crucial to efficiently construct interconnecting networks of conductive nanofillers in polymer matrices. Herein, on the basis of the three-dimensional (3D) skeleton and volume-exclusion effect of silane-modified tetra-needle ZnO (ST-ZnO) whiskers and the high conductivity of two-dimensional MXene nanosheets, multifunctional MXene/ST-ZnO/waterborne polyurethane (MTW) nanocomposite films are fabricated by coating of MXene on ST-ZnO followed by compounding with waterborne polyurethane. The 3D four-needles of the whiskers facilitate the formation of an interconnecting network in the waterborne polyurethane matrix, while the coating of MXene efficiently makes the interconnecting network of the whiskers conductive at a low amount of the MXene. The resultant MTW ternary nanocomposite film exhibits not only a high electrical conductivity of 4.8×10 4 S/m, but also an excellent electromagnetic interference shielding effectiveness of over 70 dB in the X-band at a low thickness of 100 µm. In addition, the ternary film also exhibits outstanding Joule heating performances with an equilibrium temperature of 113 °C at a low driving voltage of 3 V. The multifunctional nanocomposite films are promising for applications in portable and wearable electronics and flexible electromagnetic interference shielding devices.
ISSN:0256-7679
1439-6203
DOI:10.1007/s10118-022-2813-2