▎ 摘　　要

NOVELTY - Graphene sheet/carbon black composite black hole liquid comprises 3-8.4 pts. wt. graphene sheets, 1.5-4.5 pts. wt. carbon black, 1.5-3 pts. wt. surfactant, 1.5-3 pts. wt. aqueous high molecular polymer, 1.5-3 pts. wt. potassium hydroxide solution and 92.7-97 pts. wt. deionized water. USE - The graphene sheet/carbon black composite black hole liquid is useful in printed circuit board. ADVANTAGE - The graphene sheet/carbon black composite black hole liquid: has high dispersibility, excellent solution wettability, strong through-hole ability, low electrical resistance, and excellent binding force; has much higher performance than that of the black hole liquid with a single carbon black as the conductive medium; can keep the system stable within 300 days without sedimentation. The preparation process: is simple and efficient, low cost, high cost performance, environmentally friendly process, and suitable for large-scale production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparation of graphene sheet/carbon black composite black hole liquid. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of graphene sheet/carbon black composite black hole liquid for printed circuit board.