Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44146, USA.
Nanoscale. 2016 Apr 14;8(14):7435-42. doi: 10.1039/c5nr07000g.
The amphiphilic star-like copolymer polyethylenimine-block-poly(ε-caprolactone) (PEI-b-PCL) was utilized to transfer the pre-synthesized citrate-capped noble metal nanoparticles (NMNPs) from an aqueous layer to an organic layer without any additional reagents. Dynamic light scattering (DLS) and transmission electron microscopy (TEM) were utilized to study the assembly of the polymers coated on the surface of the citrate-capped NMNPs. After removing the organic solvent, the polymer-coated NMNPs in powder form (PCP-NMNPs) were obtained. The excellent solubility of the PEI-b-PCL allows the PCP-NMNPs to be easily dispersed in most of the organic solvents without any significant aggregation. Moreover, the good thermal stability and long-term stability make PCP-NMNPs an excellent NMNP-containing hybrid system for different specific applications, such as surface coating, catalysis and thermoplastic processing of nanocomposite materials.
两亲性星形嵌段共聚物聚乙烯亚胺-聚（ε-己内酯）（PEI-b-PCL）被用于将预先合成的柠檬酸封端的贵金属纳米颗粒（NMNPs）从水相转移到有机相，而无需任何额外的试剂。动态光散射（DLS）和透射电子显微镜（TEM）用于研究表面涂覆有柠檬酸封端的 NMNPs 的聚合物的组装。除去有机溶剂后，得到粉末形式的聚合物涂覆的 NMNPs（PCP-NMNPs）。PEI-b-PCL 的优异溶解性使得 PCP-NMNPs 能够容易地分散在大多数有机溶剂中，而没有明显的聚集。此外，良好的热稳定性和长期稳定性使 PCP-NMNPs 成为用于不同特定应用的包含 NMNP 的优良混合体系，例如表面涂层、催化和纳米复合材料的热塑性加工。
