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Sol-Gel Synthesis of Bioglasses: A Growth Kinetics Study by Dynamic Light Scattering

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Abstract:

In this work, the nucleation of bioglasses particles was approached through Dynamic Light Scattering in order to analyze how different synthesis parameters influence on the particle growth. It was evaluated the following parameters: pH between 10 and 11; surfactant concentration (PEG) between 0 to 20g/L; Three different compositions were chosen based on the 47SiO2-(38 – x)Na2O-(9 + x)CaO-6P2O5 system ( x = 0, 10 and 20). For each experimental condition, the growth kinetics (Kc.t-1) was calculated, and the obtained values were analyzed by factorial design of experiments. The results evidence that higher pH, higher surfactant concentration and lower Na/Ca ionic ratio lead to lower values growth kinetics in which, in turn, are associated with lower particle size.

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Periodical:

Advances in Science and Technology (Volume 102)

Pages:

18-23

DOI:

https://doi.org/10.4028/www.scientific.net/AST.102.18

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Online since:

October 2016

Authors:

Roger Borges, Juliana Marchi*

Keywords:

Bioglass, Dynamic Light Scattering, Sol-Gel

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© 2017 Trans Tech Publications Ltd. All Rights Reserved

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