23 Jul Completely biodegradable polyester material and preparation and application of completely biodegradable polyester
Abstract
The invention discloses a completely biodegradable polyester material and preparation and application of the completely biodegradable polyester. The material comprises the following components: 60-98 percent of poly(L-lactic acid) and 2-40 percent of poly(L-lactic acid-caprolactone) copolymer, wherein the molecular weight of the copolymer is 10000-100000, a number ratio of lactic acid units to caprolactone units is (95:5) to (20:80), and the copolymer contains arms of 1-6 specific structures. The preparation method of the material comprises the following steps: dissolving poly(L-lactic acid) into an organic solvent in which polylactic acid can be dissolved, adding the copolymer in a formula amount, and fully stirring, so that the copolymer is completely dissolved; and adding a polymer solution into water or a mixed solution of water/alcohol, separating out the blend by precipitating, filtering, and drying, thereby preparing the to-be-prepared completely biodegradable polyester material. The material can be used for preparing corresponding products in the fields of artificial bones, scaffolds for tissue engineering and interventional medical equipment in biomedicine, and the prepared product has excellent mechanical property and biodegradability.
Year: 2014
Country: CN
Doc No: 104231578