Biodegradable absorbents and methods of preparation
OwnerBronislava G. Belenkaya, Valentina I. Sakharova +1inventors
InventorsBronislava G. Belenkaya, Valentina I. Sakharova, Vyacheslav N. Polevov
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Abstract
A biodegradable microfiber absorbent comprises a substantially homogeneous mixture of at least one hydrophilic polymer and at least one biodegradable polymer. The absorbent can be prepared by an electro hydrodynamic spinning of a substantially homogeneous polymer mixture. Medical dressings for burns and wounds, cavity dressings, drug delivery patches, face masks, implants, drug carriers that comprises at least one microfiber electrospun from a polymer mixture are provided. The dressings can have variable water vapor penetration characteristics and variable biodegradation times.
Claims9
A method for preparing a biodegradable microfiber absorbent, the method comprising electrohydrodynamic processing of a mixture containing:
- (a) a solvent;
- (b) poly-(N-vinyl) pyrrolidone;
- and
- (c) a biodegradable polyester which is a a blend of a copolymer of lactide and glycolide with a homopolymer of lactide, with a component ratio of the poly-(N-vinyl) pyrrolidone to the biodegradable polyester by weight being from about 2:98 to about 50:50, wherein the electrohydrodynamic processing comprises introducing the mixture into a stream of a compressed gas.
Dependencies are inferred from the claim text.