Currently a lot of synthetic routs have been proposed for preparation of various metal nanoparticles for sensing applications. A majority of them are based on the borohydride approach. We have found that some polymers (e.g. polyurethane) can be a promising support for immobilization of borohydride. The present work describes a method for preparation of polyurethane foam modified with borohydride as a new form of the widely known reducing agent and its possibilities for synthesis of metal nanoparticles. This new reagent is quite stable when stored at low temperature and is convenient for use in the synthesis of nanoparticles since it ensures precise dosing of a reductant. Metal nanoparticles could be synthesized both in solution and on polymer surface by varying reagents concentrations during the modified polyurethane foam preparation. It was illustrated that nanoparticles prepared using the borohydride-modified polymer have a narrower size distribution that probably should be ascribed to the stabilizing effect of the polymeric matrix. Optical properties of polyurethane foam-based nanocomposites with metal nanoparticles open a possibility of their using for sensing substances that affect formation of nanoparticles or their distribution between the polymer and the solution.

中文翻译：

---

硼氢化物改性的聚氨酯泡沫：合成用于传感应用的金属纳米粒子的一种广泛使用的新型还原剂

当前，已经提出了许多合成溃烂物，用于制备用于感测应用的各种金属纳米颗粒。它们中的大多数基于硼氢化物方法。我们发现某些聚合物（例如聚氨酯）可以作为固定硼氢化物的有前途的支持。本工作描述了一种制备用硼氢化物改性的聚氨酯泡沫的方法，该硼氢化物是一种广为人知的还原剂的新形式，及其合成金属纳米颗粒的可能性。这种新试剂在低温保存时非常稳定，并且由于可确保精确配给还原剂，因此可方便地用于纳米颗粒的合成。通过在改性聚氨酯泡沫塑料制备过程中改变试剂浓度，可以在溶液中和聚合物表面上合成金属纳米颗粒。说明了使用硼氢化物改性的聚合物制备的纳米颗粒具有较窄的尺寸分布，这可能应归因于聚合物基质的稳定作用。具有金属纳米颗粒的聚氨酯泡沫基纳米复合材料的光学性质为它们用于感测影响纳米颗粒形成或它们在聚合物与溶液之间的分布的物质提供了可能性。