| Abstrakt: |
In order to improve the water swelling resistance of poly (acrylic acid-co-hydroxyethyl methacrylate) [P (AA-co-HEMA)] fiber, a certain amount of polytetrafluoroethylene (PTFE) was introduced into the spinning dope of P(AA-co-HEMA). The newly-prepared dispersion was subsequently spun into fiber through wet spinning with dilute sulfuric acid as a coagulant. The wet-spun fiber was used as a carrier to load iron ions by simple impregnation, and a composite fiber was then fabricated by sintering. The effects of sintering time, PTFE addition amount and iron ions loading time on the performance of composite fiber to catalytically decolorize Methylene Blue ( MB) were studied. The results showed that PTFE made the fiber hydrophobic, and the water contact angle of the sintered fiber increase to 130°, which facilitated separation, rapid drying and reuse of fiber. When the amount of PTFE added was twice the mass of P (AA-co-HEMA), the sintering time was 7 min, and the loading time of iron ions was 2 h, the prepared fiber showed better application performance in comparison with other samples. Within three cycles, the composite fiber prepared with proper parameters could completely decolorize MB within 1 min, and its decolorization efficiency was more than 95%. [ABSTRACT FROM AUTHOR] |
