Ag NP-Loaded Cotton Fiber Materials: Preparation, Surface Deposition, and Antibacterial Activity with Different Chemical Structures.

An amino-substituted bis(aryldiazomethane) was synthesized and used to modify cotton fibers by a carbene insertion reaction. A subsequent amidation of the modified cotton fibers introduced thioether groups onto the surface. Thus, three different types of cotton fibers with hydroxyl, amine, or thioether groups were expected to bind silver nanoparticles (Ag NPs), which were characterized by scanning electron microscopy to show the surface morphology, as well as X-ray photoelectron spectroscopy, energy-dispersive X-ray spectroscopy, and thermogravimetric analysis to quantify the loading of Ag NPs.

Preparation, Post-Modification, and Antibacterial Application of Gelatin Electrospun Membranes.

Two bis(diaryldiazomethane)s substituted with amino groups are synthesized and used for the surface modification of membranes electrospun from gelatin. These membranes are then reacted with tolylene-2,4-diisocyanate to give urea-functionalized materials, so that hydrogen peroxide can be reversibly bound onto their surface. These membranes are characterized by scanning electron microscopy, XPS, differential scanning calorimeter, and tensile test to show their surface properties and bulk properties.

Electrospun Gelatin Membrane Cross-Linked by a Bis(diarylcarbene) for Oil/Water Separation: A New Strategy To Prepare Porous Organic Polymers.

Porous organic polymers (POPs) as absorbing materials have attracted increasing attention. Here, we report a new approach to prepare these polymers for selective oil absorption from oil/water mixtures. Perfluoroalkylbis(diaryldiazomethane) was synthesized and used to modify the surface of an electrospun gelatin membrane by a carbene insertion reaction, not only to immobilize the porous network morphology by cross-linking but also to introduce perfluoroalkyl groups for oil/water separation.