Abstract: In order to investigate the negative air ions (NAI) releasing, far infrared emission and antibacterial properties of the PET/germanium fibrous composite, PET/germanium fibrous composite containing 1%—3% inorganic germanium (Ge) particles were prepared using the melt-spinning method. The surface and cross section morphology and the crystal phase structure of the composite fibers were characterized by SEM and XRD. The results showed that the inorganic Ge particles were uniformly dispersed in the fibrous composite, no agglomeration appeared. The characteristic diffraction peaks of the Ge-O was occurred at 2θ=17.4°, 24.1°, 27°, 33.5° and 51.7° in the XRD patterns of the fibrous composite, implying that the crystal structure of the Ge particles was not destroyed by the high temperature of melt-spinning. Besides, the NAI, far infrared emission showed that the value of NAI released by the PET/Ge fibrous composite was proportional to the concentration of Ge particles, which reached as high as 1 470 ions/cm3 when the mass fraction of the Ge was 3%. Furthermore, the NAI increased gradually along with temperature in the range of 25—70 ℃, and the value got to the maximum when the temperature rose to 70 ℃. Additionally, the far infrared emissivity reached the maximum of 0.9 when the adding 3% of Ge. The antimicrobial test illustrated that antibacterial activity of the fibrous composite against the S. aureus reached to 97.8% in 12 h when the Ge powders concentration was 3%.
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2018, Vol. 32 
