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 journalArticle

21 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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