聚醚醚酮材料表面磺化改性及表面金属化
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北京卫星制造厂有限公司,北京 100094

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V19

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Surface Sulfonation Modification and Surface Metallization of PEEK Materials
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Beijing Spacecrafts, Beijing 100094

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    摘要:

    为满足聚醚醚酮(PEEK)应用于雷达天线、电路组件等产品的导电、焊接等功能特性,对具有极高化学惰性的PEEK进行硫酸磺化改性,并沉积Ni-P合金金属层,实现PEEK材料表面金属化。利用扫描电镜、激光共聚焦显微镜、接触角测试仪等对PEEK表面微观结构及镀镍层进行表征。磺化改性后PEEK表面呈现三维筛网状孔洞结构,且随浸蚀时间的延长,孔洞更加规则;硫酸改性后,基材表面粗糙度增大,亲水性增强。在进行化学镀镍时,Ni-P首先在三维网状孔洞结晶,并随着时间的延长,晶核二维生长至整个表面,最后生长成三维菜花状。镀层的结合强度随磺化时间的增加,焊点脱拉强度由3.2增至7.1 MPa。PEEK材料表面磺化改性及导电金属层的成功制备,可为其在雷达天线等领域的应用提供技术支撑。

    Abstract:

    In order to meet the conductive, welding and other functional properties of poly-ether-ether ketone (PEEK) used in radar antenna, multi-chip modules and other products, PEEK with high chemical inertia was modified by sulfuric acid sulfonation, and Ni-P alloy metal layer was deposited to realize the surface metallization of PEEK material. The modified PEEK and metal coatings were characterized by SEM, laser scanning confocal microscope, and contact angle tester, respectively.The results show that the surface of PEEK modified by sulfuric acid presents three-dimensional sieve network pore structure. The pore structure becomes more regular with the increase of sulfuric acid etching time. After sulfuric acid modification, there is improved surface roughness of the substrate and the enhanced hydrophilicity.During electroless nickel plating, Ni-P nucleation crystallizes in three-dimensional network pores firstly, then with the extension of time, the crystal nucleus grow to the whole surface in two dimensions, and finally grow into three-dimensional cauliflower shape. The bonding strength between the metal layer and the substrate becomes superior with the increase of sulfonation time, where the drag strength of solder joint increases from 3.2 MPa to 7.1 MPa. In this study, the sulfonation modification of PEEK surface and the preparation of conductive metal layer has been realized, which provides technical support for its application in radar antenna and other fields.

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王楠,张家强,蔺鹏婷,孙浩然,王旭光.聚醚醚酮材料表面磺化改性及表面金属化[J].宇航材料工艺,2021,51(5):94-98.

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  • 收稿日期:2021-04-27
  • 最后修改日期:2021-09-14
  • 录用日期:2021-06-29
  • 在线发布日期: 2021-10-26
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