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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Cupric ion release controlled by copper/low-density polyethylene nanocomposite in simulated uterine solution.
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Cupric ion release controlled by copper/low-density polyethylene nanocomposite in simulated uterine solution.

机译：铜/低密度聚乙烯纳米复合材料在模拟子宫溶液中控制铜离子的释放。

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摘要

The Cu2+ release rate of novel copper/low-density polyethylene composites as an intrauterine device material in the simulated uterine solution was investigated for 280 days. The corrosion products of these composites were identified by the X-ray diffraction method. The distributions of the copper phase and the cuprous oxide phase at different corrosion depths in the composites were measured by the internal standard method. For comparison, copper particles of two sizes were embedded in a polyethylene matrix to form composites. The average copper particle diameter of the nanocomposite was 30 nm, while that of microcomposite was 52 microm. Mechanism of Cu2+ release controlled by the nanocomposite revealed that many clusters composed of copper nanoparticles, which were observed by the field emission scanning electron microscopy in the nanocomposite, led to the formation of large amounts of Cu2O and consequently facilitated the Cu2+ steady release. A scanning electron microscope with energy dispersive X-raymicroanalysis mapping technique (SEM/EDX) was employed to measure the corrosion depth and to calculate the life span of the nanocomposite. The result that the nanocomposite displayed a near zero-order release after a month of incubation indicated that the Cu2+ release behavior controlled by nanocomposite was remarkably superior to that by microcomposite.
机译：研究了新型子宫铜/低密度聚乙烯复合材料作为宫内节育器材料在模拟子宫溶液中的Cu2 +释放速率，历时280天。这些复合材料的腐蚀产物通过X射线衍射法鉴定。采用内标法测量了复合物在不同腐蚀深度下的铜相和氧化亚铜相的分布。为了比较，将两种尺寸的铜颗粒嵌入聚乙烯基体中以形成复合材料。纳米复合材料的平均铜粒径为30nm，而微复合材料的平均铜粒径为52μm。纳米复合材料控制的Cu2 +释放机理表明，由纳米复合材料的场发射扫描电子显微镜观察到的许多由铜纳米颗粒组成的簇簇导致大量Cu2O的形成，从而促进了Cu2 +的稳定释放。使用具有能量色散X射线微分析绘图技术（SEM / EDX）的扫描电子显微镜来测量腐蚀深度并计算纳米复合材料的寿命。孵育一个月后，纳米复合材料显示出接近零级释放的结果表明，纳米复合材料控制的Cu2 +释放行为明显优于微复合材料。

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