Interfacial Intelligence for Polymer Brushes: Toward Physics-Grounded Design

Abstract Polymer brushes are adaptive soft interfaces whose functions emerge from the coupling of molecular chemistry, chain architecture, grafting statistics, solvent and ion organization, and operating conditions. This complexity enables diverse functions in antifouling, lubrication, separations, sensing, and colloidal assembly but also limits the transferability of empirical design rules and purely data-driven predictions. Here, we define interfacial intelligence as a physics-grounded, state-resolved framework in which the realized interfacial state under defined operating conditions connects molecular design to function and is iteratively tested and updated through experiments. We discuss how molecular identity and brush-specific structural variables can be connected with state-resolved measurements, polymer theory, and molecular simulations to represent hydration and ion organization. Using protein-resistant brushes as a recurring example, we examine how regression identifies conditional physicochemical relationships, how high-dimensional analysis identifies candidate interfacial states and interaction patterns, and how molecular representation and literature-based tools connect chemical space to distributed experimental evidence. We further consider how active learning and automated experimentation could use these relationships to guide the next synthesis or measurement. We distinguish predictive association from mechanistic evidence and argue that physics-grounded models should generate testable predictions of how an interfacial state and its function respond to controlled perturbations. Finally, we outline a closed-loop strategy linking provenance-aware data sets, physical models, machine learning, controlled synthesis, state-resolved characterization, and adaptive experimentation. Such integration could shift polymer-brush informatics from end point prediction toward experimentally accountable and transferable interfacial design.