用简便方法以超支化聚酯为模板合成Cu-Ag合金（英文）

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

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1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3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,紫外光谱(UV-vis),X射线衍射(XRD),能量分散X射线分析(EDX)和激光粒度分析等手段进行表征。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120nm,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。

Cu-Ag particles with different molar ratios have been prepared in the hyperbranched polyester matrix 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 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. Laser particle size measurement, SEM and TEM studies show that the particles of the Cu-Ag alloy are well-dispersed with average size of 120 nm. The thermal properties of the Cu-Ag alloy have been studied by thermogravimetric Analysis （TGA）. The results show that the measurement values are close to the theoretical ones.