Journal
CHEMICAL ENGINEERING JOURNAL
Volume 439, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.135673
Keywords
Multifunction film; MXene; Graphite fiber; EMI shielding; Fire safety
Categories
Funding
- National Natural Science Foundation of China [U1833113, 12132016]
- Fundamental Research Funds for the Central Universities [WK2320000054]
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A multifunctional polyurethane film with superior electromagnetic shielding, joule heating, thermal conductivity, and flame retardancy has been designed. By adding conductive MXene wrapped with ammonium polyphosphate into the PU solution, the film demonstrates enhanced conductivity, mechanical properties, and fire safety. It has broad application prospects in EMI shielding and thermal management of advanced microelectronic systems.
A multifunctional polyurethane film (PU) with superior electromagnetic shielding performance, joule heating performance, thermal conductivity and flame retardancy has been carefully designed. The ammonium polyphosphate (APP) wrapped with conductive MXene (MAPP) is prepared by microencapsulation technology and added in PU solution for enhancing the electric conductivity of PU/graphite fiber (GF) film. The threedimensional (3D) conductive network composed of GF and MAPP promotes electron transmission efficiency and electromagnetic (EM) wave dissipation through multiple absorbtion and reflection. Compared with the PU/ GF film, the electric conductivity and thermal conductivity of PU/GF/MAPP film enhanced by 57.7% and 59.3%, respectively. What's more, the PU composite film shows excellent mechanical properties, joule heating performance and high fire safety performance. Therefore, the prepared multifunctional PU film demonstrates excellent performance, and has broad application prospects in EMI shielding and thermal management of advanced microelectronic systems.
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