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纳米级钻石涂层提高医疗器械强度 - China Medical Device Manufacturer
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Wed, January 17th, 2018

2006 秋季刊 » 技术新知
纳米级钻石涂层提高医疗器械强度

Rho-BeSt生产的钻石薄膜中单个晶体最小尺寸可达5nm。

钻石是自然界中最硬的矿物,其莫氏硬度高达10。Rho-BeSt Hartstoffbeschichtungs有限公司(奥地利,Innsbruck; www.rhobest.com)利用钻石的天然强度,开发出一种纳米晶体钻石涂层。公司采用其专利技术,将钻石加工成5nm大小的微粒,大约相当于常人头发直径的一万分之一。

公司生产的这种Rho-BeSt纳米晶体钻石涂层可用于改善生物传感器、医疗器械以及陶瓷、钨、碳化物和钛材质植入物的强度和生物相容性。400nm钻石薄膜实验表明该涂层可促进细胞生长、粘附以及活细胞分化。由于这种薄膜可覆盖在不平整的表面上,因此在牙科植入物实验中也显示了良好的应用前景。在上述实验中,涂层与骨形态生成蛋白2配合使用,可促进细胞活性和骨质结合。

该材料生物相容性得益于钻石中碳原子的晶格结构,这也使材料能够耐受辐射和化学磨蚀。此外,该涂层极为精细,因而可产生高度光滑的表面,可与Teflon涂料媲美。涂层厚度极小,因此包覆涂层后,仍可保持基材原有的形状。这一点对于电子产品极为重要,因为电子产品必须具有精密的微结构。

公司可通过不同的表面处理工艺为薄膜增添不同的特性。如果需要不吸收的惰性疏水导电表面,则可通过特殊工艺添加氢末端涂层。同样,也可通过氧末端处理使薄膜具有亲水性。

目前,将钻石涂层覆盖在基材上时,温度必须保持在550至800C之间,涂层最大面积为100320mm2。公司希望改进此项工艺,使其更为灵活,以适合更多的应用领域。

该技术最初是Doris和Detlef Steinmller夫妇于1993年发起的私人研究项目。1994年春,在奥地利因斯布鲁克大学的大力资助下,二人建立了一家研究机构,并且成功研制出超纯纳米晶体钻石颗粒。现在公司拥有4家生产机构及20余名员工(其中四分之一为物理学家),现正在尝试将钻石涂层技术用于需要高度耐磨性和低摩擦系数的产品上。目前公司主要研究生物传感器和纳米电机设备的表面处理技术。

Copyright 2006 China Medical Device Manufacturer


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