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Low molecular weight aromatic compounds possessing nonflammable and flammable characteristics in calcium fluoride nanocomposite matrices after calcination at 800 °C

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Abstract

Calcium chloride reacted with potassium fluoride in the presence of low molecular weight aromatic compounds (ArH) such as bisphenol AF, bisphenol A, bisphenol F, biphenyl, and 1-(2-naphthyl)ethanol under alkaline conditions to afford new calcium fluoride/ArH composites. Dynamic light scattering and field emission scanning electron micrographs measurements show that these calcium fluoride/ArH composites are nanometer size-controlled fine particles and have a good dispersibility and stability in water, tetrahydrofuran, 1,2-dichloroethane, methanol, dimethyl sulfoxide, N,N-dimethylformamide, and 2-propanol. Interestingly, aromatic compounds possessing acidic hydroxyl groups in the calcium fluoride nanocomposites were found to exhibit a nonflammable characteristic even after calcination at 800 °C, although the corresponding aromatic compounds possessing neither acidic hydroxyl groups nor hydroxyl groups in the nanocomposites exhibited a usual flammable characteristic under similar conditions. In contrast, calcium fluoride/ArH nanocomposites, which were prepared under no catalytic conditions, afforded a clear weight loss corresponding to the contents of ArH in the composites to exhibit a usual flammable characteristic.

Ar-OH can exhibit a nonflammable characteristic in calcium fluoride nanocomposite matrices even after calcination at 800°C

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Acknowledgments

This work was partially supported by a grant-in-aid for Scientific Research from the Ministry of Education, Science, Sports and Culture, Japan.

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Authors and Affiliations

  1. Department of Frontier Materials Chemistry, Graduate School of Science and Technology, Hirosaki University, Hirosaki, 036-8561, Japan

    Tomoya Saito & Hideo Sawada

  2. National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Shimoshidami, Moriyama-ku, Nagoya, 463-8560, Japan

    Masakazu Nishida & Haruhiko Fukaya

  3. LIXIL Corporation, Tokoname, Aichi, 479-8588, Japan

    Hiroshi Kakehi, Yoshihiro Kato, Masashi Miura & Norifumi Isu

Authors
  1. Tomoya Saito
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  2. Masakazu Nishida
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  3. Haruhiko Fukaya
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  4. Hiroshi Kakehi
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  5. Yoshihiro Kato
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  6. Masashi Miura
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  7. Norifumi Isu
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  8. Hideo Sawada
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Corresponding author

Correspondence to Hideo Sawada.

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ESM Fig. 1

UV–vis spectra of CaF2/bisphenol A nanocomposites (run 2 in Table 1) before (a) and after (b) calcination at 800 °C, and parent bisphenol A (c) in methanol solutions: each concentration of nanocomposites: 0.2 g/dm3 (DOC 125 kb)

ESM Fig. 2

UV–vis spectra of CaF2/bisphenol F nanocomposites (run 3 in Table 1) before (a) and after (b) calcination at 800 °C, and parent bisphenol F (c) in methanol solutions: each concentration of nanocomposites: 0.2 g/dm3 (DOC 175 kb)

ESM Fig. 3

UV–vis spectra of CaF2/biphenyl nanocomposites (run 4 in Table 1) before (a) and after (b) calcination at 800 °C, and parent biphenyl (c) in methanol solutions: each concentration of nanocomposites: 5 mg/dm3 (DOC 107 kb)

ESM Fig. 4

UV–vis spectra of CaF2/Naph-EtOH nanocomposites (run 5 in Table 1) before (a) and after (b) calcination at 800 °C, and parent Naph-EtOH (c) in methanol solutions: each concentration of nanocomposites: 0.02 g/dm3 (DOC 117 kb)

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Saito, T., Nishida, M., Fukaya, H. et al. Low molecular weight aromatic compounds possessing nonflammable and flammable characteristics in calcium fluoride nanocomposite matrices after calcination at 800 °C. Colloid Polym Sci 291, 945–953 (2013). https://doi.org/10.1007/s00396-012-2813-9

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  • DOI: https://doi.org/10.1007/s00396-012-2813-9

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