Tehfe Mohamad-Ali, Jamois Romain, Cousin Patrice, Elkoun Saïd, Robert Mathieu
Carrefour of Innovative Technology and Ecodesign (CITE), Faculty of Engineering, University of Sherbrooke, 2500 blvd Université, Sherbrooke, Quebec J1K 2C3, Canada.
Langmuir. 2015 Apr 14;31(14):4305-13. doi: 10.1021/la504518c. Epub 2015 Apr 3.
New methods for the preparation of silver nanoparticles/polymer nanocomposite materials by thermal cationic polymerization of ε-caprolactone (ε-CL) or α-pinene oxide (α-PO) at room temperature (RT) and under air were developed. The new initiating systems were based on silanes (Si), starch nanocrystals (StN) and metal salts. Excellent polymerization profiles were revealed. It was shown that silver nanoparticles (Ag(0) NPs) were in situ formed and that the addition of StN improves the polymerization efficiency. The as-synthesized nanocomposite materials contained spherical nanoparticles homogeneously dispersed in the polymer matrices. Polymers and nanoparticles were characterized by gel permeation chromatography (GPC), X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and UV-vis spectroscopy. A coherent picture of the involved chemical mechanisms is presented.
开发了在室温（RT）和空气中通过ε-己内酯（ε-CL）或氧化α-蒎烯（α-PO）的热阳离子聚合制备银纳米颗粒/聚合物纳米复合材料的新方法。新的引发体系基于硅烷（Si）、淀粉纳米晶体（StN）和金属盐。揭示了优异的聚合曲线。结果表明，银纳米颗粒（Ag(0) NPs）是原位形成的，并且StN的加入提高了聚合效率。合成的纳米复合材料包含均匀分散在聚合物基质中的球形纳米颗粒。通过凝胶渗透色谱（GPC）、X射线衍射（XRD）、透射电子显微镜（TEM）、X射线光电子能谱（XPS）和紫外可见光谱对聚合物和纳米颗粒进行了表征。给出了所涉及化学机理的连贯图像。
