Superfine fibre porous membrane material and preparation method thereof

The invention relates to an ultra-fine fiber porous membrane material, consisting of 85 percent to 100 percent of polyhydroxy fatty acid ester (PHA) and 0 percent to 15 percent of polylactic acid (PLA); the fiber ranges from 20 nanometers to 600 nanometers in diameter; the porous membrane ranges from 100 nanometers to 10 microns. The preparation method of the ultra-fine fiber porous membrane material is as follows: dissolving the PHA and PLA in solution in proportion to make transparent solution; drawing off the solution with an injector and fix the solution on a micro-injector; controlling the flow speed and voltage respectively through the micro-injector and a high-voltage static generator; placing a receiving device at the outlet of a capillary; producing the ultra-fine fiber porous membrane material by electrostatic spinning. Owing to taking PHA polymer and PLA as raw material, the material provided by the invention has good biodegradability and biocompatibility; besides, the preparation method is simple