用简便方法以超支化聚酯为模板合成Cu-Ag合金

A Convenient Approach for Preparation of Cu-Ag Alloy Particles by Using Hyperbranched Polymers as Templates

摘要:

以超支化聚酯为模板，用抗坏血酸为还原剂合成了不同摩尔比的Cu-Ag 粒子。用第一代超支化聚酯为核，2, 2-二羟甲基丙酸为支化单体，通过逐步聚合反应合成了第三代的超支化聚酯。合成的超支化聚酯和Cu-Ag合金用红外光谱（FT-IR），核磁共振普（1H-NMR），紫外光谱（UV-vis），X-射线衍射（XRD），能量分散X射线分析（EDX）和激光粒度分析等。XRD 和EDX研究确认了Cu-Ag合金的形成。激光粒度仪, 扫描电镜（SEM）和透射电镜（TEM）研究表明Cu-Ag合金的平均粒径为120纳米，并且具有很好的分散性。热性能用热重分析（TGA）进行了表征，结果显示测量值和理论值相近。

Abstract:

Cu-Ag particles with different molar ratio have been prepared in the hyperbranched polyester matrix by using ascorbic acid as a reducing agent. The third generation hyperbranched polyester has been synthesized by step by step polymerization using the first generation hyperbranched polyester as core molecular and 2, 2-dimethylol propionic acid as branched monomer. The synthesized hyperbranched polyester and Cu-Ag alloy were characterized by different analytical techniques such as FT-IR, 1H-NMR, UV-vis spectra, X-ray diffraction (XRD), SEM, Energy Dispersive X-ray (EDX), Laser particle size measurement, TEM, etc. The XRD and EDX studies confirm the formation of Cu-Ag alloy. The Laser particle size measurement, SEM and TEM studies show that the Cu-Ag alloy is well-dispersed particles with average size of 120 nm. The thermal properties of the Cu-Ag alloy have been studied by thermogravimetric Analysis (TGA). The results showed that the measurement values are close to the theoretical ones.