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. 2021 Nov 18;13(22):3987. doi: 10.3390/polym13223987

Figure 2.

Figure 2

FTIR spectra of electrospun TPU, TPU/ZnO 2 wt%; TPU/ZnO 4 wt%, TPU/CuO 2 wt%; TPU/CuO 4 wt%.