▎ 摘　　要

NOVELTY - Producing a reversible hemiaminal or aminal gel composition for use in 3D printing, involves preparing liquid precursor composition, where liquid precursor composition operable to remain in first liquid state at about room temperature. The liquid precursor composition comprises an organic amine composition, an aldehyde composition, a polar aprotic organic solvent, and a carbon nanomaterial, heating the liquid precursor composition to transition from the first liquid state to a gel state, transitioning the gel state to a second liquid state, and 3D printing a solid carbon nanomaterial object comprising a solid printed gel from the second liquid state with a pre-determined orientation for the carbon nanomaterial. USE - Method for producing a reversible hemiaminal or aminal gel composition for use in 3D printing. ADVANTAGE - The method provides flexibility of access to a greater variety of dynamic chemical reactions, prevents the collapse of tubing from overpressure, and provides fluid loss control.