Synthesis of nanoporous calcium phosphate spheres using poly(acrylic acid) as a structuring unit

Peng Wang, Se Won Yook, Shin Hee Jun, Yuan Long Li, Miyoung Kim, Hyoun Ee Kim, Young Hag Koh

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

Calcium phosphate (CaP) spheres with nanopores were synthesized using poly(acrylic acid) (PAA) as the structuring unit. In this method, colloidal droplets of the PAA/Ca2+ complex were prepared by adding a Ca(NO3)2 solution to a PAA aqueous solution and then mixed with an (NH4)2HPO4 solution, which allowed the nucleation and growth of CaP nanocrystals in the PAA matrix. Thereafter, the as-synthesized PAA/CaP spheres were heat-treated at 550 °C for 3 h to remove the PAA phase, followed by treatment in ammonium nitrate solution to remove the CaO phase formed as an impurity. The prepared CaP spheres showed a narrow size distribution with an average diameter of 146 ± 43 nm and nanopores formed via the removal of the CaO phase.

Original languageEnglish
Pages (from-to)1207-1209
Number of pages3
JournalMaterials Letters
Volume63
Issue number13-14
DOIs
Publication statusPublished - 2009 May 31

Keywords

  • Calcium phosphate spheres
  • Ceramics
  • Poly(acrylic acid)
  • Powder technology

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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