Composites Science and Technology：具有均勻分布和高含量碳基納米填料的聚甲醛復合材料制備及電磁屏蔽、焦耳熱、導熱性和防滴落性能研究
論文摘要：
Fabrication of high-performance and multiple-function conductive polymer composites with uniform distribution and high content of carbon-based nanofillers has been a formidable challenge. In this study, a new strategy was introduced to fabricate polyoxymethylene (POM)/multi-walled carbon nanotube (MWCNT) and POM/graphene nanoplate (GNP) composites (PMCNT and PMGNP, respectively), with uniform distributions and high contents of MWCNT and GNP, by assisting of miscible poly(L-lactide) (PLLA). As expected, the composites exhibit robust electromagnetic interference (EMI) shielding, Joule heating, thermal conductivity, and anti-dripping performance. Specifically, the EMI shielding effectiveness of PMCNT40 (with 40 wt% MWCNT) and PMGNP48 (with 48 wt% GNP) reached 45.7 and 44.7 dB with 0.15 mm in thickness. The high electrical and through plane thermal conductivities were 3484 S/m and 1.95 Wm?? 1K?? 1, respectively, for PMCNT40, and the corresponding values for PMGNP48 were 2695 S/m and 4.24 Wm?? 1K?? 1, respectively. Furthermore, the fabricated composites achieved excellent Joule heating performance, resulting in increases in surface temperature increase to 101.4 ?C and 107.6 ?C rapidly at the driving voltages of 3.0 V (in case of PMCNT40) and 6.0 V (in case of PMGNP48), respectively. In addition, the composites exhibited excellent solvent resistance and anti-dripping performance, indicating high potential applicability in extreme environments.
全文鏈接：https://doi.org/10.1016/j.compscitech.2021.108681