ポリプロピレン/エチレンービニルアルコール共重合体芯鞘構造繊緎の溶融静電紡糸

摘要

Rodlike samples were made from Polypropylene (PP)/Poly(ethylene-co-vinyl alcohol) (EVOH) core/sheath composite fibers. From these rodlike samples, ultra thin fibers were produced using a melt-electrospinning system equipped with a CO_2-laser melting device. The effects of structure of rods on the morphology and structure of electrospun fibers have been investigated. The following conclusions were reached: (ⅰ) electrospun fibers about 1μm in diameter can be obtained using the system developed; (ⅱ) the diameter of electrospun fiber is influenced by the PP content, the feed rate (Fr) of the rod and the molten end-to-collector distance (Cd); (ⅲ) in the case of spinning of core/sheath single rods, electrospun fibers having trough structure are obtained by the extraction of EVOH component; (ⅳ) in the case of spinning of the fiber bundles, the diameters of electrospun fibers are not influenced by the diameter of the rod; and (ⅴ) laser heating decreases the melting points of PP and EVOH.%ナノファイバーは，非常に大きな比表面積，優れた可撓性rnなどの際立った特徴を持つため，新規機能性材料としての利rn用が期待されている．ナノファイバーを作製する一方法としrnて静電紡糸法がある［1］．この静電紡糸法は，高分子溶液とrn高分子融液に高電圧を作用させて繊維を作製する方法に分類rnされ，前者は溶媒型静電紡糸法：S-ESP，後者は溶融型静電紡rn糸法：M-ESPとそれぞれ呼ばれている．