Chemical analyzes of the fibrous membranes were performed using a Fourier transform infrared spectrometer (PerkinElmer Instruments Ltd.). The spectral range is 4000~500cm−1, and the resolution is 4cm−1.
Chemical analysis of the fiber membrane was performed using a Fourier transform infrared spectrometer (Perkin Elmer Instruments Co., Ltd.). The spectral range is 4000~500cm − 1, with a resolution of 4cm − 1.
Fourier transform infrared spectrometer (Perkin Elmer Instrument Co., Ltd.) was used for chemical analysis of fiber membrane. The spectral range is 4000 ~ 500 cm1, and the resolution is 4cm−1.