| abstract |
The invention discloses a preparation method of a fluorescent chemical sensor for polyurethane-based Cu 2+ recognition. The modified rhodamine fluorescent compound is introduced into the polyurethane structure through chemical bonds, the fluorescent group is uniformly dispersed, and does not migrate and precipitate during use. , with stable and long-lasting fluorescence properties. Cu 2+ can be better combined with the N atom of the imino group and the O atom of the carbonyl group in rhodamine, thereby changing its fluorescence characteristics and achieving the purpose of identifying Cu 2+ . The fluorescent chemical sensor of the present invention is based on polyurethane foam, and has the unique properties of large specific surface area and adjustable pore structure. Sensitivity, rapid detection of Cu 2+ is achieved, and the solid foam form is convenient for storage and use, the synthesis method is simple, the cost is low, and it has a good promotion prospect. |