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. 2021 May 20;6(12):4686–4696. doi: 10.1016/j.bioactmat.2021.04.037

Fig. 1.

Fig. 1

Preparation of the PCEC microporous coating. (a) Illustration of the swelling and freeze-drying process. (b) SEM micrographs of the PCEC coating with different swelling times. (c) The pore volume and pore density of the PCEC coating with different swelling times.