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Synthesis and Characterization of Polyetheretherketone/hydroxyaptite Composites Via Solution Blending Method

Author: SongYuDian
Tutor: WengLvQian
School: Harbin Institute of Technology
Course: Materials Science
Keywords: Biological Materials PEEK / HA composite Solution blending Surface Modification Graded materials
CLC: TB332
Type: Master's thesis
Year: 2010
Downloads: 83
Quote: 1
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Abstract


Used in aerospace, automotive , military and other polyether ether ketone (PEEK) with its superior overall performance . In recent years , due to the high demand of biological material , PEEK / HA bio- composites came into being. In this paper, KH560 hydroxyapatite surface modification to improve its dispersion in the composite . And for the first time prepared by solution blending of PEEK / HA composite materials . First, the coupling agent KH560 1wt.% Of a dilute solution of acetic acid as a catalyst , in a PH of about 4.0 , mixed with hydroxy apatite colloidal solution was stirred for 8 h , washed and dried to obtain a modified hydroxyapatite limestone powder ( Modified - HA ) . Then the solution blending method, using sulfolane as solvent, in the 250 ° C , so that the HA and PEEK mixed to obtain a final product of PEEK / HA composites . With IR , TGA and colloidal dispersion experiment KH560 improvement hydroxyapatite Characterization , IR , and the colloidal dispersion of the experimental results showed that KH560 successfully coated on the surface of the HA ; KH560 amount of coating was calculated by the TGA weight loss of 1.3%. TGA, hardness test results show that : the amount of the residual solvent in the composite is less than 2 wt % solution blending method was PEEK / HA composite . The hardness of the composite material increases with the increase of the content of HA , and PEEK / m - HA composite hardness of the material on the whole than the PEEK / HA composite material high . The mechanical properties of the composite analysis showed that : the Young's modulus of the composites increase with the increase of HA content . HA content of 5 % , tensile strength reaches a maximum 76.21MPa and then decreases with the increase of the content of HA , microcracks successful theory to explain this phenomenon . Observation Composite Material Fracture morphology FIG found , showing a large number of recesses on the fracture surface of the PEEK / m - HA composites PEEK / HA composite material with the HA content increases , the voids of the composite surface is gradually increased more severe HA reunion ; pit, the inorganic particles with the matrix of fibrous Quick combination , there may be the key and the M - HA PEEK in dispersion has been improved . Finally, coating and molding method graded material prepared with a special structure designed to solve the contradiction between the composite HA content less biologically active HA content poor mechanical properties , improve the biological activity and mechanical properties .

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CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Composite materials > Non-metallic composite materials
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