Interfacially Polymerized β‐Cyclodextrin Film for Rapid Removal of Organic Dyes

Porous cyclodextrin‐based polymers are widely used for the rapid removal of organic pollutants in water. Traditional cyclodextrin‐based polymers are prepared in the organic phase, which is time consuming and costly. Herein, a novel cyanuricchloride (TCT) cross‐linked porous β‐cyclodextrin‐based thin‐film composite membrane is designed in the aqueous phase by interfacial polymerization. A self‐standing TCT‐CDP film is formed instantly at the surface of water phase at room temperature. Several different water‐soluble organic dyes such as Methylene Blue, Neutral Red, Auramine, Brilliant Green, and Crystal Violet are selected for rejection study with TCT‐CDP membrane. The effective rejection of TCT‐CDP membrane for typical dyes is up to 99%, indicating TCT‐CDP membrane exhibit excellent selectivity for separation of organic dyes from water. A self‐standing TCT‐CDP film is formed instantly at the surface of water phase by interfacial polymerization at room temperature under mild conditions. The rejection of TCT‐CDP membrane for organic dyes is >96%, indicating TCT‐CDP membrane exhibit good selectivity for separation of organic dyes from wastewater.