Preparation of hierarchically organized calcium phosphate-organic polymer composites by calcification of hydrogel

Kozue Furuichi, Yuya Oaki, Hirofumi Ichimiya, Jun Komotori, Hiroaki Imai

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

A novel type of calcium phosphate-organic polymer composite having a hierarchical structure was prepared by calcification of a poly(acrylic acid) hydrogel. Macroscopically, an organic gel containing phosphate ions was transformed into an opaque solid material by diffusion of calcium ions. We observed the formation of micrometer-scale layered structures consisting of nanoscale crystals of hydroxylapatite (HAp) in the opaque products. The laminated architecture resulting from the periodic precipitation of calcium phosphate varied with the reaction conditions, such as the concentrations of the precursor ions and the density of the gel. The nanoscopic structure of HAp crystals was modified by the addition of gelatin to the polymer matrix.

Original languageEnglish
Pages (from-to)219-225
Number of pages7
JournalScience and Technology of Advanced Materials
Volume7
Issue number2
DOIs
Publication statusPublished - 2006 Mar

Fingerprint

Organic polymers
Hydrogel
Calcium phosphate
Hydrogels
carbopol 940
Durapatite
Ions
Composite materials
Gels
Crystals
Gelatin
Polymer matrix
Acrylics
Calcium
Phosphates
Acids
calcium phosphate

Keywords

  • Biomaterials
  • Hierarchical architecture
  • Hydroxylapatite
  • Organic/inorganic composite materials
  • Polymer gel

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

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AU - Oaki, Yuya

AU - Ichimiya, Hirofumi

AU - Komotori, Jun

AU - Imai, Hiroaki

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AB - A novel type of calcium phosphate-organic polymer composite having a hierarchical structure was prepared by calcification of a poly(acrylic acid) hydrogel. Macroscopically, an organic gel containing phosphate ions was transformed into an opaque solid material by diffusion of calcium ions. We observed the formation of micrometer-scale layered structures consisting of nanoscale crystals of hydroxylapatite (HAp) in the opaque products. The laminated architecture resulting from the periodic precipitation of calcium phosphate varied with the reaction conditions, such as the concentrations of the precursor ions and the density of the gel. The nanoscopic structure of HAp crystals was modified by the addition of gelatin to the polymer matrix.

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