Effect of annealing on mechanical and morphological properties of Poly(L-lactic acid)/Hydroxyapatite composite as material for 3D printing of bone tissue growth stimulating implants

International Scientific and Technical Youth Conference "Perspective Materials of Constructional and Medical Purpose"

材料科学;医药卫生

Dubinenko, G.E.^1 ; Zinoviev, A.L.^1 ; Bolbasov, E.N.^1 ; Novikov, V.T.^1 ; Tverdokhlebov, S.I.^1

National Research Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk

634050, Russia^1

关键词: 3-D printing;    Additional annealing;    Bone tissue;    Composite scaffolds;    Effect of annealing;    Homogeneous distribution;    Morphological properties;    Poly L lactic acid;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/511/1/012008/pdf
DOI  :  10.1088/1757-899X/511/1/012008

来源: IOP

【 摘 要 】

In this work, effect of additional annealing on mechanical and morphological properties of 3D-printed PLLA/HAp composite scaffolds of three compositions (12.5, 25, and 50 wt.% of HAp) was investigated. Morphology and Young's modulus of 3D-printed scaffolds were investigated by scanning electron microscopy and nanoindentation. It has been shown that additional annealing does not have an effect on the homogeneous distribution of HAp powder in the PLLA-matrix. Results of nanoindentation showed growth of Young's modulus after annealing. The maximum value of 9393 ± 709 MPa Young's modulus was reached for the annealed composite with 50 wt.% of HAp.