Solid‐Like‐Phase Confined Interfacial Polymerization: A Universal Platform for the Controlled 2D Growth of COP Membranes

h⁻¹ bar⁻¹, 3.7-fold enhancement over LLIP), with >98.8% Congo red rejection. Systematic implementation across three solvent systems and five structurally diverse amine monomers demonstrates the universality and chemical adaptability of SLCIP. Industrial scalability is validated through pilot-scale fabrication of A4-sized membranes with <5% spatial performance deviation. This work establishes an ambient-processable interfacial engineering paradigm, offering a sustainable platform for next-generation molecular separation technologies.