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Preparation and applications of novel fluoroalkyl end-capped oligomers/calcium carbonate nanocomposites

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Abstract

Calcium chloride reacted with sodium carbonate in the presence of a variety of self-assembled molecular aggregates formed by fluoroalkyl end-capped acrylic acid, 2-methacryloyloxyethane sulfonic acid, dimethylacrylamide, and acryloylmorpholine oligomers in aqueous solutions to afford the corresponding fluorinated oligomers/calcium carbonate composites in excellent to moderate isolated yields. These fluorinated calcium carbonate composites thus obtained were shown to have a good dispersibility not only in water but also in traditional organic media including fluorinated solvents. Dynamic light scattering measurements (DLS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that these fluorinated composites are nanometer-size-controlled particles and well dispersed in these media. Cross-linked fluoroalkyl end-capped acrylic acid co-oligomer containing poly(oxyethylene) units was also applied to the preparation of new cross-linked fluorinated calcium carbonate nanocomposites under similar conditions. The obtained cross-linked fluorinated calcium carbonate nanocomposites were found to have an extremely higher dispersibility in aqueous and organic media including fluorinated solvents, compared to that of the corresponding fluoroalkyl end-capped oligomer nanocomposites. In particular, it was verified that these fluorinated calcium carbonate nanocomposites are applicable to the dispersion above poly(methyl methacrylate) (PMMA) film surface. Interestingly, field-emission SEM (FE-SEM) images of the cross-section of the modified PMMA films showed that calcium carbonate particles dispersed into these PMMA films could be arranged regularly above the modified film surface. More interestingly, cross-linked fluorinated oligomeric aggregates were able to provide suitable host moieties for the crystallization of calcium carbonate.

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Authors and Affiliations

  1. Department of Frontier Materials Chemistry, Faculty of Science and Technology, Hirosaki University, Bunkyo-cho, Hirosaki, 036-8561, Japan

    Hideo Sawada & Yasufumi Shikauchi

  2. R & D Center, INAX Corporation, Tokoname, Aichi, 479-8588, Japan

    Hiroshi Kakehi, Yoshihiro Katoh & Masashi Miura

Authors
  1. Hideo Sawada
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  2. Yasufumi Shikauchi
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  3. Hiroshi Kakehi
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  4. Yoshihiro Katoh
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  5. Masashi Miura
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Correspondence to Hideo Sawada.

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Sawada, H., Shikauchi, Y., Kakehi, H. et al. Preparation and applications of novel fluoroalkyl end-capped oligomers/calcium carbonate nanocomposites. Colloid Polym Sci 285, 499–506 (2007). https://doi.org/10.1007/s00396-006-1566-8

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  • DOI: https://doi.org/10.1007/s00396-006-1566-8

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