Sodium alginate (SA) is a polyanionic copolymer consist of mannuronic(M) and guluronic(G) sugar residues, it has been comment used in biomedical applications. In this research, polylactic acid (PLA) and Tencel fiber were fabricated into PLA/Tencel composite nonwoven fabric. Then the gel aqueous Ca-SA was combined with PLA/Tencel composite nonwoven fabric by three-dimensional (3D) coating method to form porosity coating layer. Then LMWCS was sprayed on the whole surface to form antibacterial layer. The physical properties of novel wound dressing were evaluated such as tensile strength, tear strength, water absorption rate, stiffness and SEM. In SEM observation result indicated, the coating layer performs highly porosity structure. Between coating layer and PLA/Tencel composite nonwoven fabric was combined by physical bonding. In this way, PLA/Tencel composite nonwoven fabric can remain some part of air permeability and also enhance the strength of dressing.
Polylactic acid (PLA) is often applicable in biomedical because in environment it degrades into carbon dioxide and water. This study aims to prepare sandwich-structure PLA/ Tencel composite nonwoven, following by its property test for evaluating effect on wound dressing. In this study, PLA fibers, blended with Tencel fibers, were made into nonwoven fabrics based on nonwoven processing technology. After that, their tensile strength, tearing strength and softness were tested for evaluating nonwoven fabric properties. The result displays that, PLA nonwoven fabrics show higher tensile strength and tearing strength than Tencel nonwoven fabrics.
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