Preparation of Functional Non-woven Fabrics Made from Regenerated Cellulose Fiber-Supported ZIF-67 for Formaldehyde Removal

To prepare a new formaldehyde adsorption material with excellent comprehensive performance, high practical value, and easy industrial production, a regenerated cellulose fiber (RCF) non-woven fabric-supported ZIF-67 (ZIF-67@RCF) was prepared by in situ growth of ZIF-67 on the surface of fibers. The microscopic morphology, mechanical properties, specific surface area, and formaldehyde adsorption properties were analyzed, and the results showed that the ZIF-67 can rapidly and extensively grow on the surface of RCF under normal temperature and pressure with uniform distribution. The fiber surface can be completely covered within 25 min with a loading capacity of nearly 2 wt%. The important thing is this method does not damage the mechanical properties of RCF non-woven fabric; on the contrary, it improves the mechanical properties to some extent. In an enclosed testing space, formaldehyde was able to be removed quickly in the presence of ZIF-67@RCF and the removal rate could reach 98% in 10 min. We believe that this material could be used to prepare new air purification filter for formaldehyde removal.