Method of making porous biodegradable polymers
AssigneeIndustrial Technology Research Institute
InventorsHsi-Hsin Shih, Kuang-Rong Lee, Huey-Min Lai, Chin-Chin Tsai, Yuan-Chia Chang
Life of this patent
Estimating the term…
Abstract
A method of making a porous biodegradable polymer is disclosed, which comprises (a) placing a biodegradable polymer and a solvent in a chamber; (b) adding a supercritical fluid to the chamber and maintaining the chamber at a predetermined temperature for a sufficient period of time to allow the supercritical fluid to dissolve into the biodegradable polymer with the help of the solvent; and (c) venting the supercritical fluid and the solvent by reducing the pressure in the chamber, thereby obtaining a porous biodegradable polymer.
Claims16
A method of making a porous biodegradable polymer, comprising the steps of:
- (a) placing a biodegradable polymer and a solvent in a chamber;
- (b) adding a supercritical fluid to the chamber and maintaining the chamber at a predetermined temperature for a sufficient period of time to allow the supercritical fluid to dissolve into the biodegradable polymer with the help of the solvent;
- (c) venting the supercritical fluid and the solvent by reducing the pressure in the chamber, thereby obtaining the porous biodegradable polymer;
- and
- (d) promptly heating the porous biodegradable polymer to increase the porosity thereof.
Dependencies are inferred from the claim text.