Comparison of apatite formation on polyamide films containing carboxyl and sulfonic groups in a solution mimicking body fluid

Chikara Ohtsuki, Takahiro Kawai, Masanobu Kamitakahara, Masao Tanihara, Toshiki Miyazaki, Yoshimitsu Sakaguchi, Shigeji Konagaya

Research output: Contribution to journalArticlepeer-review

Abstract

Apatite formation on polyamide films containing either carboxyl or sulfonic groups was compared in 1.5SBF, whose ion concentrations are 1.5 times those of a simulated body fluid (SBF). The sulfonic groups induced the apatite nucleation earlier than the carboxyl groups. In contrast, the rate of crystal growth depended not on the kind of functional group, but on the degree of supersaturation of the surrounding solution. The more ready association of sulfonic groups with calcium ions may lead to earlier apatite nucleation than that of carboxyl groups. Adhesive strength of the apatite layer to polyamide film containing sulfonic groups was significantly lower than that with carboxyl groups depending on the chemical interactions as well as on the mechanical properties of the polyamide film.

Original languageEnglish
Pages (from-to)477-480
Number of pages4
JournalKey Engineering Materials
Volume309-311 I
DOIs
Publication statusPublished - 2006 Jan 1
Externally publishedYes

Keywords

  • Apatite
  • Carboxyl groups
  • Simulated body fluid (SBF)
  • Sulfonic groups

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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