PEEK/NANO-HA composites for SLS and preparation methods thereof

  • US 10,106,651 B2
  • Filed: 02/02/2018
  • Issued: 10/23/2018
  • Est. Priority Date: 09/02/2015
  • Status: Active Grant
First Claim
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1. A method for preparing Polyetheretherketone/Nano-hydroxyapatite (PEEK/NANO-HA) composites for Selective Laser Sintering (SLS), comprising steps of:

  • (1) selecting PEEK having a particle size of 20-70 μ

    m;

    (2) adding the PEEK in the step 1 to an aqueous solution of a first reaction precursor so that the PEEK is uniformly dispersed in the aqueous solution to obtain a first mixed solution;

    (3) stirring the first mixed solution obtained in the step (2), dripping an aqueous solution of a second reaction precursor in the mixed solution to adjust a pH to 10-12, and reacting for 24-48 hours under stirring and obtaining a second mixed solution; and

    (4) filtering the second mixed solution in the step 3 by suction, washing, drying and grinding to eventually obtain the PEEK/NANO-HA composites;

    wherein the first reaction precursor is a precursor solution containing calcium ions;

    the second reaction precursor is a precursor solution containing phosphate ions;

    a Ca concentration in the first the reaction precursor and a P concentration in the second reaction precursor has a Ca/Pmolar ratio of 1.67-2.0;

    a concentration of the aqueous solution of the first reaction precursor is 0.5-1.0 mol/L, and a concentration of the aqueous solution of the second reaction precursor is 1.0-2.0 mol/L;

    the NANO-HA in the PEEK/NANO-HA composites has needle-like morphology, with a width of the NANO-HA of 20-30 nm and a length of the NANO-HA of 100-150 nm.

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