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  • AccScience Publishing  (2)
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  • AccScience Publishing  (2)
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  • 1
    Online Resource
    Online Resource
    Evaluation of mechanical and biological properties of akermanite/poly-ether-etherketone composite fabricated by hightemperature laser powder bed fusion
    AccScience Publishing ; 2023
    In:  International Journal of Bioprinting Vol. 9, No. 3 ( 2023-03-03), p. 699-
    Details
    In: International Journal of Bioprinting, AccScience Publishing, Vol. 9, No. 3 ( 2023-03-03), p. 699-
    Abstract: High-temperature laser bed powder fusion (HT-LPBF) technology is an ideal method for processing poly-ether-ether-ketone (PEEK) implants with personalized bionic structures, but the biological inertia of PEEK limits its medical applications. In this study, we evaluated the mechanical and biological properties of a novel akermanite (AKM)/PEEK composite for HT-LPBF. The results showed that tiny AKM particles are evenly attached to the surface of the PEEK particle. The delayed peak crystallization temperature and stable sintering window ensure the processing feasibility of the AKM/PEEK composites. The tensile strength and Young & rsquo;s modulus are in the range of 30.83 & ndash;98.73 MPa and 2.27 & ndash;3.71 GPa, respectively, which can match the properties of cancellous bones and meet their implanting requirement. The CCK-8 experiments demonstrated the biocompatibility of the composites and the good proliferation of bone marrow stromal cells. The dense hydroxyapatite network layer and petal-like hydroxyapatite demonstrates biological activity, indicating that the composite has a good potential in the orthopedics fields.
    Type of Medium: Online Resource
    ISSN: 2424-7723 , 2424-8002
    URL: Article
    DOI: 10.18063/ijb.699
    Language: Unknown
    Publisher: AccScience Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 2834694-4
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Preparation of polyamide 6 and its titanium dioxide photocatalytic composite powders for laser powder bed fusion
    AccScience Publishing ; 2022
    In:  Materials Science in Additive Manufacturing Vol. 1, No. 3 ( 2022-08-24)
    Details
    In: Materials Science in Additive Manufacturing, AccScience Publishing, Vol. 1, No. 3 ( 2022-08-24)
    Abstract: Laser powder bed fusion (LPBF) additive manufacturing is an effective method to prepare three-dimensional ordered network titanium dioxide (TiO2) photocatalytic materials, therefore enhancing the absorption intensity of incident light and improving the photocatalytic efficiency. However, TiO2 is difficult to be directly sintered by LPBF due to the high melting point and brittleness. In this study, we prepared a polyamide 6 (PA6)-coated TiO2 photocatalytic composite powder for LPBF based on the dissolution precipitation polymer coating (DPPC) method and evaluated its LPBF processability. In the precipitation process of PA6, there was a significant crystallization exotherm with temperature recovery. Effective temperature control of this precipitation process had a significant effect on the morphology and particle size distribution of the precipitated powder. The increase of the dissolved concentration of PA6 to 150 g/L produced an obvious temperature gradient of the reactor, resulting in a wide particle size distribution and a powder with a characteristic porous surface. The prepared PA6/TiO2 composite powder presents a near-spherical porous-surfaced morphology, a high specific surface area of 240.5 m2/kg, an appropriate Dv(50) of 48.8 μm, and a wide sintering window of 26.6°C, indicating a good LPBF processability and potential of the photocatalytic application.
    Type of Medium: Online Resource
    ISSN: 2810-9635
    URL: Article
    DOI: 10.18063/msam.v1i3.14
    Language: Unknown
    Publisher: AccScience Publishing
    Publication Date: 2022
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