Preparation and Properties of Silver-Based Cellulose/Polyvinyl Alcohol Antibacterial Materials

This paper reports the synthesis and application of nanosilver antibacterial materials. The preparation methods of nanosilver complexes are described. The effect of silver nitrate concentration and nanosilver dispersion on antibacterial properties was analysed. In this experiment, TEMPO oxidant was used to oxidize hydroxyl on the C 6 position of wood nanocellulose into a carboxyl group. Meanwhile, carboxyl compound was used to react with AgNO 3 , the silver composite material was prepared with PVA as the substrate. We use interface grafting. The surface of cellulose is bonded with reactive functional groups to form a transition layer. To improve the interface bonding between matrix and reinforcing fiber. The Ag-NC-PVA nanocomposite film was characterized by UV–Vis, SEM, TEM, mechanical properties and antibacterial properties analysis. SEM and TEM images showed that the size of most silver nanoparticles ranged from 5 to 20 nm; the mean particle size was 10 nm. The mechanical properties of Ag-NC-PVA films were greater than that of PVA film. When the amount of Ag-NC was 4%, its tensile strength was 71.3 MPa; it’s almost 15% higher than PVA. After antibacterial analysis, Ag-NC endowed PVA with excellent antibacterial properties. The prepared Ag-NC-PVA greatly promotes the practical application development of the silver-based composite bacteriostatic material.