Preparation and properties of the absorbable flow blocking membrane
We prepared the polylactic acid(PLLA)choke film by electrospinning to explore the properties of absorbable choke films.The surface morphology of PLLA membranes in different solvent systems was observed by scanning electron microscopy.The me-chanical properties of PLLA membranes in different solvent systems were studied by universal material testing machine.The pore size and distribution,as well as porosity of PLLA membranes in different solvent systems were measured.The results showed that the pore size of PLLA membranes in different solvent systems was less than 20 μm,the porosity was more than 80％,and the static contact angle was larger than 100°.The fiber surface of CF/AN/PLLA membrane had porous structure,with the lowest tensile strength and tear force.The fiber surface of the CF/DMF/PLLA membrane was smooth and uniform,which had the maximum tensile strength and tear force.The surface morphology and mechanical properties of CF/DMF 80/20 PLLA menbrane were the best.The properties of this film are expected to be applied to the research of the flow blocking membrane components of heart occluder.
万方数据
维普
