Modular and Tailorable Triblock Copolymer Dispersants for Robust Aqueous Dispersion of High‐Surface‐Area Carbon Black

Stable aqueous dispersion of carbon black is essential in conductive, optical, and energy‐related applications, but remains challenging due to its hydrophobic and highly aggregated nature. Herein, we present a series of structurally modular triblock copolymer PAA‐ b ‐PS‐ b ‐P(MPEGAA) dispersant synthesized via RAFT polymerization, designed to integrate multiple interfacial interactions—including hydrogen bonding, π–π stacking, electrostatic repulsion, and steric stabilization—within a single but tunable architecture. Each block contributes synergistically to anchoring and stabilization, and their molecular parameters can be precisely tailored to optimize dispersion behavior. Compared to representative high‐performance commercial dispersants, this platform achieves superior dispersion efficiency and long‐term colloidal stability for high‐surface‐area carbon black. This work demonstrates a generalizable strategy for designing precision polymeric dispersants adaptable to a broad range of challenging aqueous nanoparticle systems.