title: Composite fiber of poly D,L-lactic acid/hydroxyapatite produced by melt spinning technology.
abstract: In this paper, preparation technologies for the compound fibers of poly D,L-lactic acid (PDLLA)/hydroxyapatite (HA) were investigated. Starting with PDLLA of weight average molecular mass 94,200-1,130,000 and HA powders of diameter 4-10 microm, the compound fibers of PDLLA/HA were obtained through a two stage process: first the adsorption of HA particles on the surface of PDLLA flakes using the liquid-phase adsorption method then melt-extrusion, and second the spinning collection. Experimental result was showed that the high performance composite fibers of PDLLA/HA with diameter of 15-30 micrometer could be produced by the PDLLA of weight average molecular mass 150,000-300,000, the HA powders content 5 wt%, the melt extrusion temperature below 160 degrees C and the screw rotating speed of 10-15 r/min, the spinning collection speed of 2-5 m/min.
authors.affiliation: Biomedical Materials and Engineering Research Center, Wuhan University of Technology, Wuhan 430070, PR China. wantao@mail.whut.edu.cn
authors.forename: Tao
authors.initials: T
authors.lastname: Wan
authors.forename: Shipu
authors.initials: S
authors.lastname: Li
authors.forename: Wenjuan
authors.initials: W
authors.lastname: Zhou
authors.forename: Yuhua
authors.initials: Y
authors.lastname: Yan
authors.forename: Jianhua
authors.initials: J
authors.lastname: Li
authors.forename: Jianhua
authors.initials: J
authors.lastname: He
mesh_terms: D000327:Adsorption; D001709:Biotechnology / Q000379:methods; D020099:Coated Materials, Biocompatible / Q000032:analysis / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D017886:Durapatite / Q000032:analysis / Q000737:chemistry*; D006358:Hot Temperature; D019344:Lactic Acid / Q000032:analysis / Q000737:chemistry*; D008422:Materials Testing; D010316:Particle Size; D011091:Polyesters; D011108:Polymers / Q000032:analysis / Q000737:chemistry*; D012399:Rotation; D013784:Textiles / Q000032:analysis
chemical_list: D020099:Coated Materials, Biocompatible; D011091:Polyesters; D011108:Polymers; D019344:Lactic Acid; C033616:poly(lactide); D017886:Durapatite