Preparation And Characterization Of Antibacterial PET Composite Nanofibers

Polyethylene terephthalate (PET) is a thermoplastic polyester in common life. Theproterties of PET are excellent toughness, wear resistance, electrical insulation,chemical resistance and mechanical strength. Polyester fiber production produced byPET polyester more than50%in global fiber production, and the proportion of the valueis growing. But the PET polyester fiber is difficult to meet the needs of people living.Functional PET polyester fiber has become a hotspot research to maintain the originalperformancewhile. Taking into the spread of pathogens account in the textile fiber is oneof the major carriers. It is important to exploit a PET polyester fiber with antibacterialfunctiont, because of the vast majority of ordinary textile fibers do not have the abilityto kill bacteria and viruses while extile fibers with their porous morphology conduciveto microbial attachment. How to fast and efficient antibacterial agent composite to PETfibers, it is a big challenge for basic research and applied research at present. This topicusing electrostatic spinning process to prepare PET Composite Nanofibers, based oninorganic nano-titanium dioxide as an antibacterial agent, phenoxy resin (PHEB) asreinforced polymer.(1) Added PHEB to the PET electrospinning solution using the electrospinningmethod to prepared the fiber membranes by different quality mass ratio of PET/PHEB.Used scanning electron microscopy (SEM), Fourier transform infrared spectroscopy(FTIR), differential scanning calorimetry (DSC) and mechanical properties of tensiletest to characterize fibers. SEM results showed that: pure PET fiber diameterdistribution between100-600nm, and the fiber surface had many collapsed polymer.PET/PHEB composite fiber diameters ranged from300-400nm, the fibers surface weresmooth and uniform. Tensile properties of the test results showed that: pure PET fibermembrane tensile strength was0.98MPa, yield stress was0.45MPa, the Young’smodulus was8.07MPa. But different proportions of PET/PHEB composite fibermembrane tensile strength were1.59-2.75MPa, yield stress could reached1.13-2.16MPa, the Young’s modulus were reaches21.53-39.52MPa.(2) Poly(ethylene terephthalate)(PET)/Phenoxy resins(PHEB) composite nanofiber mats containing TiO2nanoparticle(NPs)(B-PPBT) were successfully prepared byelectrospinning mixed PET/PHEB/TiO2NPs solutions with different amounts of PHEB.The nanofiber mats containing TiO2NPs were characterized by SEM, TEM, DSC,FT-IR and analyzed antimicrobial and mechanical properties. The results revealed thatthe addition of PHEB was beneficial for the spinnability and fiber morphology ofB-PPBT composite fiber mats, significantly reduced the agglomeration of TiO2NPs,and also improved the mechanical properties and antimicrobial ability of PET/TiO2(B-PT) nanofiber mats. The resultant B-PPBT antimicrobial composite nanofiber matswith its improved mechanical strength may be a potential candidate for protectiveclothing.(3) Poly(ethylene terephthalate)(PET)/Phenoxy resins(PHEB) composite nanofibermats containing TiO2nanoparticle(NPs)(L-PPBT) were successfully prepared byloaded TiO2nanoparticles onto the surface of PET/PHEB fiber using low-temperaturehydrothermal synthesis method. The nanofiber mats containing TiO2NPs werecharacterized by SEM, XRD, BET and analyzed antimicrobial and mechanicalproperties.XRD results showed that the size of TiO2NPs was about5nm,and it`s anatase.Antibacterial test results showed that the antibacterial rate of PET/TiO2(L-PT)nanofiber mats was about31%, and the antibacterial rate of L-PPBT fiber mats wasabout95%.