Fig. 7From: Preparation of a new superhydrophobic/superoleophilic corn straw fiber used as an oil absorbent for selective absorption of oil from watera Variation of water contact angle and oil contact angle of superhydrophobic/superoleophilic corn straw surfaces in aqueous solutions with different pH values. b The relationship between contact angles of the resulting superhydrophobic/superoleophilic corn straw fibers and days of storage in air environmentBack to article page