Figure 3.
ATR-FTIR spectra of PNIPAAm (a), PNH_3 (b), PNH_5 (c) and PNH_10 (d) NFs before crosslinking. The shaded areas around 1050 and 3300 cm−1 are assigned to the stretching of C–O–H and –OH groups in HMAAm, respectively.
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