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

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 (lambda(parallel to)) and EMI SE (EMI SE parallel to) values of the thermally conductive Ti3C2Tx/(o-GNPs/PLA) composites significantly increased to 3.44 W center dot m(-1)center dot K-1 and 65 dB (3.00 mm), increased by 1223.1% and 2066.7%, respectively, compared with lambda(parallel to) (0.26 W center dot m(-1)center dot K-1) and EMI SE parallel to (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.

Automated summary

This work presents a facile fabrication strategy for thermally conductive graphite nanosheets/poly(lactic acid) sheets with ordered GNPs via FDM 3D printing. Superior EMI SE and thermal conductivity were achieved by combining the o-GNPs/PLA with Ti3C2Tx films.