Effect of moisture on the reactivity of alpha-tricalcium phosphate
Por:
Espanol, Montserrat, Davis, Emilia, Meslet, Eliott, Mestres, Gemma, Montufar, Edgar B. and Ginebra MP
Publicada:
1 jun 2023
Resumen:
The ability of the high-temperature polymorph of tricalcium phosphate,
& alpha;-TCP, to hydrolyse to calcium-deficient hydroxyapatite
underlies many developments in the field of synthetic bone grafts,
including calcium phosphate cements, foams, and self-setting inks. The
objective of the present work was to investigate the effect of humidity
on & alpha;-TCP powder reactivity. The results showed that a 3-week
incubation at high relative humidity (80%) had no impact on reactivity,
but, as the incubation was prolonged, the powder started to hydrolyse.
This reactivity was associated to the presence of defects and to an
amorphous phase induced during powder milling. Moisture studies
performed under static/dynamic conditions gave comparable water
adsorption percentages. The dynamic studies further proved irreversible
water sorption, indicating that some water molecules reacted with the
powder after short incubation times. Taken together, these results
demonstrate that, although & alpha;-TCP powder adsorbs water from
moisture immediately, the impact on reactivity appears only after
several weeks of storage.
Filiaciones:
Espanol, Montserrat:
Univ Politecn Cataluna, Dept Mat Sci & Met Engn, Biomat Biomech & Tissue Engn Grp, Avinguda Eduard Maristany 16, Barcelona 08019, Spain
Univ Politecn Cataluna, Barcelona Res Ctr Multiscale Sci & Engn, Avinguda Eduard Maristany 16, Barcelona 08019, Spain
Davis, Emilia:
Univ Politecn Cataluna, Dept Mat Sci & Met Engn, Biomat Biomech & Tissue Engn Grp, Avinguda Eduard Maristany 16, Barcelona 08019, Spain
Meslet, Eliott:
Univ Politecn Cataluna, Dept Mat Sci & Met Engn, Biomat Biomech & Tissue Engn Grp, Avinguda Eduard Maristany 16, Barcelona 08019, Spain
Mestres, Gemma:
Univ Politecn Cataluna, Dept Mat Sci & Met Engn, Biomat Biomech & Tissue Engn Grp, Avinguda Eduard Maristany 16, Barcelona 08019, Spain
Montufar, Edgar B.:
Univ Politecn Cataluna, Dept Mat Sci & Met Engn, Biomat Biomech & Tissue Engn Grp, Avinguda Eduard Maristany 16, Barcelona 08019, Spain
Ginebra MP:
Univ Politecn Cataluna, Dept Mat Sci & Met Engn, Biomat Biomech & Tissue Engn Grp, Avinguda Eduard Maristany 16, Barcelona 08019, Spain
Univ Politecn Cataluna, Barcelona Res Ctr Multiscale Sci & Engn, Avinguda Eduard Maristany 16, Barcelona 08019, Spain
Inst Bioengn Catalonia IBEC, Barcelona 08028, Spain
Green Published, hybrid
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