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首页> 外文期刊>Journal of Materials Science >Au nanoparticles grafted on plasma treated polymers
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Au nanoparticles grafted on plasma treated polymers

机译：等离子体处理的聚合物上接枝的金纳米颗粒

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摘要

Surfaces of four thermoplastic polymers (polyethylene, polyethyleneterephthalate, polytetrafluoroethylene and polystyrene) were modified by plasma discharge and subsequently grafted with dithiol to introduce thiol (-SH) groups. Biaxially oriented high density polyethylene (PE) in the form of 40 μm thick foils, biaxially oriented polyethyleneterephthalate (PET), polytetrafluoroethylene (PTFE) and biaxially oriented polystyrene (PS) were used. The samples were modified in direct plasma on Balzers SCD 050 device. Exposure time was 120 s, discharge power 8.3 W and the treatment was accomplished at room temperature. Immediately after the plasma treatment the samples were inserted into methanol solution of biphenyl-4, 40-dithiol for 2h. To coat the polymers with the gold nanoparticles the plasma treated samples were immersed for 2 h into freshly prepared colloidal solution of Au nanoparticles. After the treatment of the plasma modified polymers with dithiol the concentration of free radicals declines since the free radicals mediate the dithiol binding on polymer molecular chains.
机译：通过等离子放电对四种热塑性聚合物（聚乙烯，聚对苯二甲酸乙二醇酯，聚四氟乙烯和聚苯乙烯）的表面进行改性，然后用二硫醇接枝以引入硫醇（-SH）基团。使用厚度为40μm的箔形式的双轴定向高密度聚乙烯（PE），双轴定向聚对苯二甲酸乙二醇酯（PET），聚四氟乙烯（PTFE）和双轴定向聚苯乙烯（PS）。将样品在Balzers SCD 050设备上直接进行等离子体修饰。曝光时间为120 s，放电功率为8.3 W，该处理在室温下完成。等离子体处理后，立即将样品插入联苯-4、40-二硫醇的甲醇溶液中2小时。为了用金纳米颗粒涂覆聚合物，将经过等离子体处理的样品浸入新鲜制备的金纳米颗粒胶体溶液中2小时。在用二硫醇处理等离子体改性的聚合物之后，自由基的浓度下降，因为自由基介导了二硫醇在聚合物分子链上的结合。

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