Physics

Fabrication

Pathology

Electrical conductor

Electromagnetic shielding

Engineering

Electromagnetic interference

Composite material

Materials science

Alternative medicine

Electronic engineering

Graphite

Nuclear magnetic resonance

Stacking

Medicine

Chinese Journal of Polymer Science

This work proposes a facile fabrication strategy for thermally conductive graphite nanosheets/poly(lactic acid) sheets with ordered GNPs (o-GNPs/PLA) via fused deposition modeling (FDM) 3D printing technology. Further combinations of o-GNPs/PLA with Ti3C2Tx films prepared by vacuum-assisted filtration were carried out by “layer-by-layer stacking-hot pressing” to be the thermally conductive Ti3C2Tx/(o-GNPs/PLA) composites with superior electromagnetic interference shielding effectiveness (EMI SE). When the content of GNPs was 18.60 wt% and 4 layers of Ti3C2Tx (6.98 wt%) films were embedded, the in-plane thermal conductivity coefficient (λ||) and EMI SE (EMI SE||) values of the thermally conductive Ti3C2Tx/(o-GNPs/PLA) composites significantly increased to 3.44 W·m–1·K–1 and 65 dB (3.00 mm), increased by 1223.1% and 2066.7%, respectively, compared with λ|| (0.26 W·m–1·K–1 ) and EMI SE|| (3 dB) of neat PLA matrix. This work offers a novel and easily route for designing and manufacturing highly thermally conductive polymer composites with superior EMI SE for broader application.

Thermally Conductive Poly(lactic acid) Composites with Superior Electromagnetic Shielding Performances via 3D Printing Technology