ABSTRACT:Polysaccharide-chitosan, sodium chondroitin sulfate, and pectin-nanofibrous fabrics were prepared from the respective polysaccharide/poly(ethylene oxide) (PEO) blend solutions by electrospray deposition (ESD). The surface morphologies of the electrosprayed fabrics were observed by scanning electron microscopy (SEM). Unblended polysaccharide solutions showed low ESD processability; viz., the solutions could not be electrosprayed, or provided a non-fibrous morphology composed of spherical entities when ESD was applicable. The addition of high-molecular-weight PEO (M w ¼ 500;000) to chitosan solutions significantly enhanced the formation of a fibrous structure. Sodium chondroitin sulfate/PEO and pectin/PEO blend solutions were generally too viscous to be sprayed at 25 C; at 70 C, however, we succeeded in forming the fibrous structure from these solutions by ESD. The results indicate that adequate heating is effective to improve the processability of such highly viscous blend solutions into the electrostatic fiber formation.

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An acrylic resin emulsion containing a quaternary ammonium salt (hybrid q‐chitosan/acrylic resin emulsion) was prepared by emulsion polymerization using an acrylic monomer with and without DAAM. DAAM was used to incorporate a functional keto group into the acrylic resin emulsion. Furthermore, a hybrid chitosan/acrylic resin emulsion was prepared for comparison. The elution of q‐chitosan in water from the acrylic resin film with a keto group was less than that from the acrylic resin emulsion without a keto group. In addition, the mechanical properties of the hybrid q‐chitosan/acrylic resin film could be modified by q‐chitosan that was crosslinked between acrylic resin particles. Furthermore, hybrid q‐chitosan/acrylic resin films had adsorption ability for formaldehyde, and the antimicrobial properties of these films were superior to those of the hybrid chitosan/acrylic resin film.magnified image