Preparation and antibacterial properties of PTFE/Cu2O fiber membrane
Polytetrafluoroethylene/cuprous oxide(PTFE/Cu2O)fiber membranes were prepared by mixing Cu2O as an antibac-terial agent with PTFE using three-dimensional asynchronous stretching technique including maturation,piston,extrusion,calen-daring,drying,drawing and setting,etc.The effects of Cu2O particle size and addition amount on the microscopic morphology,pore size,porosity and air and moisture permeability of the fiber membranes were investigated.And the antibacterial properties of PTFE/Cu2O fiber membranes were evaluated.The results showed that the particle size of Cu2O had little effect on the microscop-ic morphology and moisture permeability of PTFE/Cu2O fiber membranes,but the PTFE/Cu2O fiber membranes prepared with Cu2O with small particle size(98 nm)was better in the performance;the"fibril node"structure of PTFE/Cu2O fiber membrane became more uniform,and the average pore size,porosity and air permeability all increased,but the moisture permeability did not change much with the increase of Cu2O addition;PTFE/Cu2O fiber membrane had the average pore size of 0.26 μm,the porosity of 66.5％and the air permeability up to 5.09 mm/s when the mass fraction of Cu2O added was 0.8％;the PTFE/Cu2O fiber membrane prepared by adding 0.8％Cu2O by mass fraction with a particle size of 98 nm had a certain antibacterial effect on both Escherichia coli and Staphylococcus aureus;and the antibacterial experiments showed that the survival rates of Escherichia coli and Staphylococcus aureus were 73％and 69％,respectively.
polytetrafluoroethylene fiber membranecuprous oxidefill modificationantibacterial propertyair and moisture permeability
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