Hydroxyapatite pattern formation in PVA gels

Yasushi Suetsugu; Dominic Walsh; Junzo Tanaka; Stephen Mann

doi:10.1007/s10853-009-3815-y

Hydroxyapatite pattern formation in PVA gels

Yasushi Suetsugu^*, Dominic Walsh, Junzo Tanaka, Stephen Mann

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

10 Citations (Scopus)

Abstract

Sodium hydroxide solution was allowed to diffuse from the edge of an acidic poly(vinyl alcohol) gel sheet containing dissolved calcium and phosphate ions, and calcium phosphate was observed to precipitate as the pH rose. The precipitation pattern changed depending on the solute concentration near the reaction front; precipitate "walls" were formed in areas in which the calcium phosphate concentration was higher or the sodium hydroxide concentration was lower than the conditions for homogeneous precipitation, and within a very limited concentration combination of calcium phosphate and sodium hydroxide, a regular stripe pattern with a pitch of about 100 mu m was formed. The calcium phosphate precipitate obtained was a single phase of hydroxyapatite. It was also found that apatite ceramic sheets with periodic porous structures or with undulate patterns could be manufactured by sintering gels with stripe patterns.

Original language	English
Pages (from-to)	5806-5814
Number of pages	9
Journal	Journal of Materials Science
Volume	44
Issue number	21
DOIs	https://doi.org/10.1007/s10853-009-3815-y
Publication status	Published - Nov 2009

Keywords

DICALCIUM PHOSPHATE DIHYDRATE
REACTION-DIFFUSION SYSTEMS
LIESEGANG PATTERNS
CALCIUM-PHOSPHATE
PRECIPITATION PATTERNS
PERIODIC PRECIPITATION
RAMAN
COMPOSITES
PHASE
RINGS

Access to Document

10.1007/s10853-009-3815-y

Handle.net

Persistent link

Cite this

@article{ab597404cc1d4fedb9c03ee5062864cb,

title = "Hydroxyapatite pattern formation in PVA gels",

abstract = "Sodium hydroxide solution was allowed to diffuse from the edge of an acidic poly(vinyl alcohol) gel sheet containing dissolved calcium and phosphate ions, and calcium phosphate was observed to precipitate as the pH rose. The precipitation pattern changed depending on the solute concentration near the reaction front; precipitate {"}walls{"} were formed in areas in which the calcium phosphate concentration was higher or the sodium hydroxide concentration was lower than the conditions for homogeneous precipitation, and within a very limited concentration combination of calcium phosphate and sodium hydroxide, a regular stripe pattern with a pitch of about 100 mu m was formed. The calcium phosphate precipitate obtained was a single phase of hydroxyapatite. It was also found that apatite ceramic sheets with periodic porous structures or with undulate patterns could be manufactured by sintering gels with stripe patterns.",

keywords = "DICALCIUM PHOSPHATE DIHYDRATE, REACTION-DIFFUSION SYSTEMS, LIESEGANG PATTERNS, CALCIUM-PHOSPHATE, PRECIPITATION PATTERNS, PERIODIC PRECIPITATION, RAMAN, COMPOSITES, PHASE, RINGS",

author = "Yasushi Suetsugu and Dominic Walsh and Junzo Tanaka and Stephen Mann",

year = "2009",

month = nov,

doi = "10.1007/s10853-009-3815-y",

language = "English",

volume = "44",

pages = "5806--5814",

journal = "Journal of Materials Science",

issn = "0022-2461",

publisher = "Springer US",

number = "21",

}

TY - JOUR

T1 - Hydroxyapatite pattern formation in PVA gels

AU - Suetsugu, Yasushi

AU - Walsh, Dominic

AU - Tanaka, Junzo

AU - Mann, Stephen

PY - 2009/11

Y1 - 2009/11

N2 - Sodium hydroxide solution was allowed to diffuse from the edge of an acidic poly(vinyl alcohol) gel sheet containing dissolved calcium and phosphate ions, and calcium phosphate was observed to precipitate as the pH rose. The precipitation pattern changed depending on the solute concentration near the reaction front; precipitate "walls" were formed in areas in which the calcium phosphate concentration was higher or the sodium hydroxide concentration was lower than the conditions for homogeneous precipitation, and within a very limited concentration combination of calcium phosphate and sodium hydroxide, a regular stripe pattern with a pitch of about 100 mu m was formed. The calcium phosphate precipitate obtained was a single phase of hydroxyapatite. It was also found that apatite ceramic sheets with periodic porous structures or with undulate patterns could be manufactured by sintering gels with stripe patterns.

AB - Sodium hydroxide solution was allowed to diffuse from the edge of an acidic poly(vinyl alcohol) gel sheet containing dissolved calcium and phosphate ions, and calcium phosphate was observed to precipitate as the pH rose. The precipitation pattern changed depending on the solute concentration near the reaction front; precipitate "walls" were formed in areas in which the calcium phosphate concentration was higher or the sodium hydroxide concentration was lower than the conditions for homogeneous precipitation, and within a very limited concentration combination of calcium phosphate and sodium hydroxide, a regular stripe pattern with a pitch of about 100 mu m was formed. The calcium phosphate precipitate obtained was a single phase of hydroxyapatite. It was also found that apatite ceramic sheets with periodic porous structures or with undulate patterns could be manufactured by sintering gels with stripe patterns.

KW - DICALCIUM PHOSPHATE DIHYDRATE

KW - REACTION-DIFFUSION SYSTEMS

KW - LIESEGANG PATTERNS

KW - CALCIUM-PHOSPHATE

KW - PRECIPITATION PATTERNS

KW - PERIODIC PRECIPITATION

KW - RAMAN

KW - COMPOSITES

KW - PHASE

KW - RINGS

U2 - 10.1007/s10853-009-3815-y

DO - 10.1007/s10853-009-3815-y

M3 - Article (Academic Journal)

SN - 0022-2461

VL - 44

SP - 5806

EP - 5814

JO - Journal of Materials Science

JF - Journal of Materials Science

IS - 21

ER -

Hydroxyapatite pattern formation in PVA gels

Abstract

Keywords

Access to Document

Handle.net

Fingerprint

Cite this