Abstract
A novel hydrophilic and underwater oleophobic biomass polymer material was synthesized through surface modification using discarded feather fibers from chicken (CF). Firstly, CF fiber was degreased and pretreated by reduction. Then, a silane coupling agent (KH-570) was successfully grafted onto the fiber surface by mercapto-alkenyl click reaction, which afforded hydroxyl modified CF fiber (CF-OH). After being characterized by SEM, FT, and TG, its wetting behavior in different media and absorption capacity of water and oil were investigated, and the effects of pH values and salt were studied as well. It indicated that the wettability of CF fiber was greatly improved after surface modification. The water contact angle (CA) in air reduced from 150.11° to 25.35°, while the CA for underwater in diesel and chloroform reached 134.04° and 143.84°. Compared with raw CF, the wettability of the modified CF-OH in oil–water mixtures was significantly resistant to oil contamination underwater. The underwater wettability of the superhydrophilic feather fiber in the mixture of oil and water was also evaluated. The results demonstrated that the surface wettability of feather is a feasible, environmentally friendly direction of materials. The wetting capacity of CF-OH has been greatly improved.
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