Fig. 3. (a) The relationship of swelling ratio and temperature of dual-responsive ONHs with 1, 10, 25 or 50% NiPAm addition; (b) the relationship of swelling ratio and temperature of dual-responsive ONHs with 10% of NiPAm addition in different environments; (c) the relationship of swelling ratio and temperature of dual-responsive ONHs with 50% NiPAm addition at different polymerization times.
