PREPARATION OF CARBOXYLIC FLUOROCARBON POLYMER FIBERS USED AS PHOTOCATALYST CARRIER
羧基氟碳共聚物纤维光催化剂载体的制备与耐光降解

The carboxylic fluorocarbon polymer poly(hexafluorobutyl acrylate-co-methacrylic acid)(P(HFBA-co-MAA)) and poly(dodecafluoroheptyl methacrylate-co-methacrylic acid)(P(DFHMA-co-MAA)) were prepared by solution polymerization.The electrospinning experiments showed that when the amount of MMA in copolymers decreased the spinnability of P(DFHMA-co-MAA) and P(HFBA-co-MAA) copolymers became worse,at the same time the concentration of two coplymers solution decreased,and the polarity and boiling point of solvent gradually reduced; the diameter of fibers enlarged with increasing the amount of butanone in the spinning solvent; the spinnability of P(DFHMA-co-MAA) was better than that of P(HFBA-co-MAA).Using P(DFHMA-co-MAA) fibers as carrier,photocatalyst ZnS were prepared on the surface of fibers by a two-step method.The XPS results showed that Zn2+ were introduced onto the surface of fibers by coordinating with the carboxyl of fluoropolymer first,then coordinated Zn2+ reacted with S2- provided by thioacetamide to form ZnS.The amount and particle size of ZnS increased with increasing the proportion of MAA in the copolymer.Nano dimension ZnS particles could be obtained when the proportion of MAA in the copolymer was 10 wt%.The photodegradation and FTIR analysis showed that the as prepared ZnS/P(DFHMA-co-MAA) fiber composites had good stability under UV irradiation.