Preparation of superhydrophobic nanocalcite crystals using Box-Behnken design

Ahmed Barhoum, Said M. El-Sheikh, Samya El-Sherbiny, Fatma A. Morsy, Ayman Abdel-Hamid El-Midany, Hubert Rahier

Research output: Contribution to journalArticle

5 Citations (Scopus)


Superhydrophobic nanocalcite crystals were prepared via an adjusted aqueous reaction of CaO, CO2 gas and sodium oleate. Box-Behnken design was used to optimize the preparation parameters such as CaO concentration, CO2 gas flow rate and surfactant concentration. The results revealed that the produced CaCO3 is indexed to the calcite phase. The crystallite size, particle size, morphology, hydrophobicity and surface charge of CaCO3 are significantly affected by changing the preparation parameters. The addition of sodium oleate helps in reducing the crystallite size from 101 nm to 48 nm, reducing the particle size from 1.5 micrometer length scalenohedral particles to 40 nm rhombohedral particles and modifying the properties of pure CaCO3 from highly hydrophilic to superhydrophobic.
Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalArabian Journal of Chemistry
Early online date11 Nov 2014
Publication statusPublished - 14 Nov 2014


  • nano calcite crystals
  • calcium carbonate
  • Box-Behnken design
  • hydrophobicity

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