Optimization of the Structures of Quaternary Phosphonium Salt Antibacterial Agents and Their Applications in Antibacterial Polycarbonate
A series of quaternary phosphonium salt antibacterial agents(Anion-TPP-x)with x-different terminal alkenyl alkyl chain lengths were designed and synthesized.Based on this,further optimizations of the anion groups of the quaternary phosphonium salts were conducted to meet the heat resistance requirements for polycarbonate(PC)processing conditions.The effects of the antibacterial agent on the mechanical properties,transmittance,antibacterial activity,and other properties of the prepared antibacterial PC materials were systematically studied.The experimental results indicate that the quaternary phosphonium salt antibacterial agents with BF-4(FB)and CF3 SO-3(TFMS)anions show good thermal stability,which are compatible with PC processing temperatures.With the increasing concentrations of FB-TPP-x and TFMS-TPP-x,the yellow index of antibacterial PC increases while light transmittance decreases.FB-TPP-x has a minor influence on the appearance of antibacterial PC for its refractive index is closer to that of pure PC.FB-TPP-x exhibits higher antibacterial efficiency.Antibacterial PC with a 2%mass fraction FB-TPP-x achieves an antibacterial rate of over 90%against staphylococcus aureus and Escherichia coli.However,the impact strength of antibacterial PC shows a significant decline,while the retention rates of tensile strength,bending strength,and bending modulus remain relatively high.
万方数据
维普
