Mechanical and Bactericidal Properties of PVC/(Quaternized SiO2) Composite Materials

摘要

In this paper, the antibacterial and mechanical properties of the materials were studied. The results showed that the antibacterial efficiency of composites against E.coli and S.aureus is 89% and 90%, respectively. Compared with blank PVC, the tensile strength and impact strength of antibacterial PVC was improved by 66.3% and 124.1%, respectively. The good distribution of Q-SiO2 particles in PVC was investigated by electronic probe elemental scanner. The mechanism of synergistic strengthening and antimicrobial properties on PVC/Q-SiO2 composites was explained by setting structural models. PVC/Q-SiO2 composites are supposed to be ambilateral function system working in both biological and physical ways, including surface-antibacterial and internal-modification. The good distribution was explained on account of the particles' microscopic surface micro-structure, high-molecular Quaternized bonds, which generate the repulsion between particles and increase the compatibility with resin.