In the current study, mussel-inspired modification of graphite nanoplatelets (GnPs@PDA) was integrated with multi-walled carbon nanotubes (MWCNTs) to achieve a well-dispersed hybrid filler. Subsequently, the as-prepared GnPs@PDA-MWCNTs were incorporated in poly(phenylene sulfone) (PPSU) via solution blending, followed by hot pressing, to prepare the thermally conducting composites with excellent electromagnetic shielding efficiency. It was observed that the in-plane and through-plane thermal conductivity reached up to 5.4 Wm^-1K^-1 and 3.8 Wm^-1K^-1, respectively, for the composite containing 17.6 vol% GnPs@PDA-MWCNTs, thus, indicating a dramatic increment of 2060% and 1410% compared to the pure PPSU. Moreover, the obtained composites with high electrical conductivity of 183 Sm^-1 exhibited profound EMI effectiveness of 62.9 dB, along with excellent thermal stability. Overall, the developed GnPs@PDA-MWCNTs/PPSU composites are promising alternatives for multifunctional applications in electronics, thermal management and EMI protection at high temperatures.

在当前的研究中，贻贝启发的石墨纳米片改性（GnPs @ PDA）与多壁碳纳米管（MWCNT）集成在一起，以实现分散良好的混合填料。随后，通过溶液共混将制得的GnPs @ PDA-MWCNT掺入聚苯砜（PPSU）中，然后进行热压，以制备具有优异电磁屏蔽效率的导热复合材料。观察到面内和面内导热率分别达到5.4 Wm ^-1 K ^-1和3.8 Wm ^-1 K ^-1分别对含有17.6％（体积）GnPs @ PDA-MWCNT的复合材料而言，表明与纯PPSU相比，其显着增加了2060％和1410％。此外，获得的具有183 Sm ^-1的高电导率的复合材料表现出62.9 dB的深远的EMI效果以及出色的热稳定性。总体而言，开发的GnPs @ PDA-MWCNTs / PPSU复合材料是电子，热管理和高温EMI保护中多功能应用的有前途的替代品。