Extended Data Fig. 1: 3D-printing process for fabricating the graded-pore pyrolysis reactor.
From: Selective electrified polyethylene upcycling by pore-modulated pyrolysis
a, The 3D-printing process begins with preparing a solution of polylactic acid (PLA) and dichloromethane (DCM) by dissolving 42 grams of PLA in 200 milliliters of DCM at 70 °C. Once dissolved, 18 grams of carboxylic acid (–COOH) functionalized multi-walled carbon nanotubes (MWCNTs) are dispersed into the mixture, followed by further heating to remove DCM, yielding a 30/70 wt.% MWCNT/PLA composite. This composite is then extruded into a filament with a 1.75 mm diameter for 3D printing. The printing parameters are outlined in Supplementary Table 2. Post-printing, carbonization is performed at 600 °C in a nitrogen atmosphere to fully convert the MWCNT/PLA composites into carbon structures. b, Digital photos of each step of the 3D-printing process of the pyrolysis reactor.
