電子線グラフト重合法による製塩用新規イオン交換膜の開発 (第4報) ナイロン6製フィルムを基材とした陽イオン交換膜の高分子構造  [in Japanese] Development of Novel Ion-Exchange Membranes for Electrodialysis of Seawater by Electron-Beam-Induced Graft Polymerization (IV) Polymeric Structures of Cation-Exchange Membranes Based on Nylon-6 Film  [in Japanese]

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Abstract

ナイロン6製の厚み25μmのフィルムにスチレンスルホン酸ナトリウム(SSS)を電子線グラフト重合することによって,陽イオン交換膜(SSS膜)を作製した.得られたSSS膜中の基材フィルム由来の微結晶のサイズおよび微結晶間の距離を,それぞれX線回折法および中性子小角散乱法によって測定した.グラフト率の増加に伴って,微結晶のサイズは減少し,一方,微結晶間の距離は増加した.これは,ナイロン6のラメラ周縁部に接ぎ木されたポリSSS鎖が微結晶を一部,崩して,ラメラ間の非晶部に侵入するためである.0.5 M NaClを電気透析で,現行の陽イオン交換膜と同等の近い性能を示したグラフト率150%のSSS膜の微結晶のサイズおよび微結晶の間隔は,それぞれ7.6および13 nmであった.

Cation-exchange membranes containing a sulfonic acid group were prepared by electron-beam-induced graft polymerization of sodium styrene sulfonate (SSS) onto a nylon-6 film with a thickness of 25 μm. The lamella sizes and lamella-to-lamella intervals of the resultant cation-exchange membranes (SSS membranes) were evaluated by X-ray diffraction (XRD) analysis and small-angle neutron scattering (SANS), respectively. With increasing degrees of grafting, the lamella size decreased, whereas the lamella-to-lamella interval increased. This can be explained by that the poly-SSS chain grafted to the periphery of the lamella of nylon 6 partially destroys the lamella and invades the amorphous domain among the lamella. The SSS membrane with a degree of grafting of 150% exhibited a similar performance in the electrodialysis of 0.5 M sodium chloride as a current cation-exchange membrane and possessed the lamella sizes and lamella-to-lamella intervals of 7.6 and 13 nm, respectively.

Journal

  • Bulletin of the Society of Sea Water Science, Japan

    Bulletin of the Society of Sea Water Science, Japan 64(6), 360-365, 2010-12-01

    The Society of Sea Water Science, Japan

References:  9

Codes

  • NII Article ID (NAID)
    10028150649
  • NII NACSIS-CAT ID (NCID)
    AN0018645X
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    03694550
  • NDL Article ID
    11104702
  • NDL Source Classification
    ZM44(科学技術--地球科学--海洋・陸水・火山) // ZP8(科学技術--化学・化学工業--無機化学・無機化学工業)
  • NDL Call No.
    Z15-47
  • Data Source
    CJP  NDL  J-STAGE 
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