TEM observation of hydroxyapatite nanocrystals ionicallybonded onto the graftpolymer-modified PET substrate

Atsutomo Nakamura, Atsumasa Shishido, Ippei Kishida, Masahiro Okada, Tsutomu Furuzono, Yoshiyuki Yokogawa

Research output: Contribution to journalArticle

Abstract

The crystallographic orientation relationship between hydroxyapatite (HAp) nanocrystals and poly (acrylic acid) (PAA) graftpolymer-modified poly (ethylene terephthalate) (PET) substrate was studied using transmission electron microscopy (TEM). We observed the microstructure of fabricated rod-like HAp nanocrystals and the interface of HAp/PET composite where, the HAp nanocrystals are bonded onto PAA graftpolymer-modified PET substrate. The selected-area electron diffraction (SAED) pattern of interface of the HAp/PET composite indicated that some low index planes in HAp prism plane tended to be contact plane with the PET substrate surface. In particular, the [1120] plane was distinctly found as the contact plane with PET substrate. In this material, it has been reported that the carboxyl groups of PAA graft-polymer are ionically-bonded with Ca ions on surface of the HAp nanocrystal. It was suggested that the periodic ionic arrangements of the [1120] plane play an important role on the bonding between the HAp nanocrystals and the carboxyl groups of graft-polymer on the PET substrate.

Original languageEnglish
Pages (from-to)100-104
Number of pages5
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume116
Issue number1349
Publication statusPublished - Jan 2008
Externally publishedYes

Fingerprint

Durapatite
Hydroxyapatite
Nanocrystals
nanocrystals
Transmission electron microscopy
transmission electron microscopy
Substrates
carboxyl group
carbopol 940
Graft copolymers
composite materials
polyethylene terephthalate
polymers
acrylic acid
prisms
rods
diffraction patterns
electron diffraction
Polyethylene Terephthalates
Composite materials

Keywords

  • Biomaterial
  • Composite
  • Hydroxyapatite
  • Interface
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

TEM observation of hydroxyapatite nanocrystals ionicallybonded onto the graftpolymer-modified PET substrate. / Nakamura, Atsutomo; Shishido, Atsumasa; Kishida, Ippei; Okada, Masahiro; Furuzono, Tsutomu; Yokogawa, Yoshiyuki.

In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, Vol. 116, No. 1349, 01.2008, p. 100-104.

Research output: Contribution to journalArticle

Nakamura, Atsutomo ; Shishido, Atsumasa ; Kishida, Ippei ; Okada, Masahiro ; Furuzono, Tsutomu ; Yokogawa, Yoshiyuki. / TEM observation of hydroxyapatite nanocrystals ionicallybonded onto the graftpolymer-modified PET substrate. In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan. 2008 ; Vol. 116, No. 1349. pp. 100-104.
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AB - The crystallographic orientation relationship between hydroxyapatite (HAp) nanocrystals and poly (acrylic acid) (PAA) graftpolymer-modified poly (ethylene terephthalate) (PET) substrate was studied using transmission electron microscopy (TEM). We observed the microstructure of fabricated rod-like HAp nanocrystals and the interface of HAp/PET composite where, the HAp nanocrystals are bonded onto PAA graftpolymer-modified PET substrate. The selected-area electron diffraction (SAED) pattern of interface of the HAp/PET composite indicated that some low index planes in HAp prism plane tended to be contact plane with the PET substrate surface. In particular, the [1120] plane was distinctly found as the contact plane with PET substrate. In this material, it has been reported that the carboxyl groups of PAA graft-polymer are ionically-bonded with Ca ions on surface of the HAp nanocrystal. It was suggested that the periodic ionic arrangements of the [1120] plane play an important role on the bonding between the HAp nanocrystals and the carboxyl groups of graft-polymer on the PET substrate.

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