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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis of copper-polystyrene nanocomposite particles using water in supercritical carbon dioxide medium and its antimicrobial activity
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Synthesis of copper-polystyrene nanocomposite particles using water in supercritical carbon dioxide medium and its antimicrobial activity

机译：超临界二氧化碳介质中水的合成铜-聚苯乙烯纳米复合粒子及其抗菌活性

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摘要

Copper-encapsulated polystyrene nanocomposite particles were prepared through ex situ dispersion of Cu nanoparticles into monomer droplets and subsequent polymerization using water in supercritical carbon dioxide (water-in-sc-CO2) at 70°C. First, colloidal dispersion of copper nanoparticles was synthesized by chemical reduction of copper chloride (CuCl2) using sodium borohydrate (NaBH4) as reducing agent. Colloidal dispersion of copper nanoparticles was added slowly during the polymerization of styrene using water-in-sc-CO_2 medium at 70°C and 20.68 MPa. Cu nanoparticle encapsulated polymer particles were characterized by UV, X-ray diffraction, thermogravimetric analysis, SEM, and TEM. Cu nanoparticles were uniformly distributed inside the polymer matrix during the polymerization process. This work represents a simple way to prepare a variety of metal nanoparticles encapsulated polymer particles using water-in-sc-CO _2 medium. The Cu/polystyrene nanocomposite particles exhibit antimicrobial activity against a number of bacteria. The current work represents a simple, cheap and universal way to prepare a variety of metal-polymer nanocomposite materials.
机译：铜包封的聚苯乙烯纳米复合颗粒的制备方法是：将铜纳米颗粒异位分散到单体液滴中，然后在70°C的超临界二氧化碳中用水（sc-co-CO2水中）进行聚合。首先，使用硼氢化钠（NaBH4）作为还原剂，通过化学还原氯化铜（CuCl2）合成铜纳米粒子的胶体分散体。在70°C和20.68 MPa的条件下，使用sc-CO_2包水介质在苯乙烯聚合过程中缓慢添加铜纳米颗粒的胶体分散体。通过UV，X射线衍射，热重分析，SEM和TEM表征Cu纳米颗粒包封的聚合物颗粒。在聚合过程中，铜纳米颗粒均匀地分布在聚合物基体内。这项工作代表了一种简单的方法，可以使用in-sc-CO _2水包埋介质制备多种金属纳米颗粒包封的聚合物颗粒。 Cu /聚苯乙烯纳米复合颗粒显示出对多种细菌的抗菌活性。当前的工作代表了一种制备各种金属-聚合物纳米复合材料的简单，廉价且通用的方法。

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