Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 121, Issue -, Pages 411-417Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2019.04.003
Keywords
CNT/WPU composites; Filtration process; High conductive; Mechanical property; Electromagnetic interference
Funding
- A-star research grant [R-284-000-135-305]
- National Natural Science Foundation of China [51803156]
- Hubei Provincial Natural Science Foundation of China [2018CFB102]
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Highly conductive multi-walled nanotubes (MWCNT)/waterbome polyurethane (WPU) composites were prepared using facile latex technology without surfactant, in which the solid composites were achieved by filtration process to prevent the re-aggregation of MWCNT during drying process. MWCNT was distributed along the interfaces of polyurethane particles, constructing segregated structure without insulating surfactant. Therefore, high conductivity of 362.6 +/- 23.1 S m(-1) was obtained at CNT content of 10.6 wt%, resulting in excellent electromagnetic interference (EMI) shielding effectiveness (SE) of 24.7 dB at thin film thickness of 0.4 mm in X-bands. Considering lightweight and thin thickness, outstanding specific shielding effectiveness (SSE) of 537 dB cm(2) g(-1) was achieved, higher than most values of CNT composites ever reported. Furthermore, the composites exhibited desirable mechanical properties with high elongation at break of 62%, demonstrating promising applications for commercial EMI shielding, especially for flexible and stretchable devices.
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