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(A) Water contents of the n-HA/Fe2O3/PVA hydrogel and the pure PVA hydrogel. (B) DSC atlas of the dried n-HA/Fe2O3/PVA composite hydrogel and the dried pure PVA hydrogel. (C) Scanning electron microscopic image of the n-HA/Fe2O3/PVA composite hydrogel (2000×). (D) Scanning electron microscopic image of the pure PVA hydrogel (2000×).
