| 摘要 |
A low density, cross-linked glassy composite is formed by reacting polycarboxylic acids with cenospheres. The polycarboxylic acid is preferably polyacrylic acid or an alkylene dicarboxylic acid of the formula, HOOC(CH2)2-25COOH. The ratio of cenosphere to the polymer acid is preferably 5.0-0.5. The curing time may be accelerated by adding particles of basic oxides or hydroxides selected from calcium, magnesium, aluminium, zinc, or iron. Alternatively, dioic ore trioic aliphatic acids may be used as accelerators. In order to make the cenosphere surfaces more reactive, they may be etched using a hot aqueous alkali, such as sodium hydroxide. The cenospheres are typically sized in the range of 10-400 microns. The ceramic-like products may be suitable for use in bone repair or replacement or as structural composites. |
