Acid character control of bioactive glass/polyvinyl alcohol hybrid foams produced by sol-gel

被引：13

作者：

de Oliveira, A. A. R. ^{[1
]}

Ciminelli, V. ^{[1
]}

Dantas, M. S. S. ^{[1
]}

Mansur, H. S. ^{[1
]}

Pereira, M. M. ^{[1
]}

机构：

[1] Univ Fed Minas Gerais, Dept Met & Mat Engn, Belo Horizonte, MG, Brazil

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2008年 / 47卷 / 03期

关键词：

hybrid foams; bioactive glass; polyvinyl alcohol; neutralization methods; chemical structure;

D O I：

10.1007/s10971-008-1777-1

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

Bioactive glass/polymer hybrids are promising materials for biomedical applications because they combine the bioactivity of bioceramics with the flexibility of polymers. In previous work hybrid foams with 80% bioactive glass and 20% polyvinyl alcohol were prepared by the sol-gel method. The produced hybrids presented a high acidic character due to the catalysts added. In this work different methods to control the acidity and toxicity of the hybrids were also evaluated, through changes in the synthesis pH and use of different neutralization solutions. The hybrids were prepared with inorganic phase composition of 70%SiO2-30%CaO and PVA fractions of 20-60% by the sol-gel method. The characterization of the obtained foams was done by FTIR, SEM, Raman Spectroscopy, Helium Picnometry and TGA. The immersion of hybrids in a calcium acetate solution was the most adequate neutralization method. The foams presented porosity of 60-85% and pore diameters of 100-500 mu m with interconnected structure.

引用

页码：335 / 346

页数：12

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