Preparation of Polyitaconic Acid-Polyvinyl Alcohol IPN Hydrogels and Evaluation of Their Ability as a Water Reserving Material

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  • ポリイタコン酸-PVA系IPNヒドロゲルの調製とその保水材としての評価
  • ポリイタコンサン-PVAケイ IPN ヒドロゲル ノ チョウセイ ト ソノ ホスイザイ ト シテ ノ ヒョウカ

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Abstract

For use as a water reserving material, interpenetrating polymer network (IPN) hydrogels were prepared by combination of chemical crosslinking of polyitaconic acid with amidic type crosslinker and physical crosslinking of polyvinyl alcohol (PVA) based on hydrogen bonding. With an alteration in the degree of polymerization (n) of PVA (1000, 2000 or 4000) and of the added amount, the resulting IPN hydrogels were evaluated on water retentivity, compressive strength, and re-swelling. When PVA of n = 2000 was used, it was possible to produce higher swellable IPN hydrogels. With an increase in the amount of PVA, the swelling degree of IPN hydrogels in deionized water decreased, whereas the compressive strength increased according to the maximum load point. By repeating the swelling-drying process, it was proved that high re-swelling ability of IPN hydrogels is kept as both, n of PVA and the added amount increase. The water retentivity of soils increased with the addition of more IPN hydrogel. Moreover, preferable growth of white radish sprouts was observed in cultivation on the IPN hydrogels containing calcium ions as counter cation of the carboxylate anion.

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 72 (12), 731-736, 2015

    The Society of Polymer Science, Japan

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