Degradation kinetics of calcium polyphosphate bioceramic: an experimental and theoretical study

Materials Research

Qianbin Wang²  Qiguang Wang¹  Jianyun Wang¹  Xiaohua Zhang¹  Xixun Yu¹  Changxiu Wan¹ 

[1] ,Sichuan University College of Materials Science and Engineering

关键词: calcium polyphosphate;    degradation;    mathematical model;   

DOI  :  10.1590/S1516-14392009000400020

来源: SciELO

【 摘 要 】

In this work, the degradation kinetics of calcium polyphosphate bioceramic was studied. Liquid state31P nuclear magnetic resonance (NMR), X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to characterize the product. The in vitro degradation test was carried out at 37 ºC for up to 48 hours for both the simulation solution and the extreme solution. The ion concentrations were measured and analyzed by establishing a mathematical model referring to the chemical reaction kinetics. The results indicated that the degradability of calcium polyphosphate increased with the decrease of pH value, and the sample showed a rapid loss of ion concentration within the initial period of immersion followed by a slower loss ratio. The relationship between ion concentration and the degradation time coincided with Boxlucas model.

【 授权许可】

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