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Representative FTIR spectra of the pure HA (a) and the (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO)-oxidized cellulose nanofibrils (TCNFs) (b). FTIR spectra of the corresponding nanocomposites: (c) HATCNF10 prepared with 10 wt % of TCNF; (d) HATCNF40 prepared with 40 wt % of TCNF; (e) HACNC10 prepared with 10 wt % of CNC; and (f) HACNC40 prepared with 40 wt % of CNC.
