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SEM images of the as-prepared cryogels (A): C-63p4, (B): C-65p4, C: (C)-67p4; (D): C-63p2; (E): C-65p2, (F): C-67p2), (G): C-63p2 cryogel after the tenth cycle of oil absorption; (H): C-63p4 after 150 °C treatment and (I) digital camera photo of as-prepared C-63p2 cryogel.
