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(A) Viscosity of the individual and the mixed polymers solutions using a rotary viscometer at room temperature and an angular velocity of 256 rpm. Swelling profiles of: the uncrosslinked NFs at pH 6.8 up to (B) 6 h, and (C) 24 h as well as (D) glutaraldehyde-crosslinked 8:2 CS:PEO NFs at pHs 1.2 and 6.8 up to 24 h.
