| 摘要 |
A process for porous-object production which enables the regulation of pore sizes, especially the regulation of not only small pore sizes but large pore sizes. The process comprises preparing a mixture solution comprising one or more polymers comprising a copolymer of lactide and caprolactone, a solvent in which the polymers have relatively low solubility, and a solvent in which the polymers have relatively high solubility and which is compatible with the solvent in which the polymers have low solubility and freeze-drying the mixture solution to produce a porous object, wherein the content of the solvent in which the polymers have relatively low solubility in the mixture solution is changed and the freezing is conducted by cooling the mixture solution at a rate of 300°C/hr or lower, whereby the pore size of the porous object is controlled. Thus, a porous object having pore sizes of 30-1,800 mum is obtained.
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