丙三醇-水二元溶剂法抗氧化纳米铜的制备  

Preparation of Antioxidant Copper Nanoparticles in Glycerol-water Binary Solvent System

作　　者：迟聪聪 夏亮[1,2,3] 王曌 张萌 任超男[1,2,3] 袁亮 张素风 CHI Cong-cong;XIA Liang;WANG Zhao;ZHANG Meng;REN Chao-nan;YUAN Liang;ZHANG Su-feng(National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi University of Science&Technology,Xi'an 710021,China;Shaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper Development,Shaanxi University of Science&Technology,Xi'an 710021,China;Key Laboratory of Paper based Functional Materials of China National Light Industry,Shaanxi University of Science&Technology,Xi'an 710021,China)

机构地区：[1]陕西科技大学轻化工程国家级实验教学示范中心,西安710021 [2]陕西科技大学陕西省造纸技术及特种纸开发重点实验室,西安710021 [3]陕西科技大学中国轻工业纸基功能材料重点实验室,西安710021

出　　处：《包装工程》2020年第13期131-138,共8页Packaging Engineering

基　　金：国家自然科学基金(31600476);陕西科技大学轻化工程国家级实验教学示范中心项目(2018QSG01-06);陕西科技大学大学生创新创业训练计划(2018033)。

摘　　要：目的基于纳米铜在空气中易被氧化的缺点,制备单分散纳米铜颗粒,并研究改性对其抗氧化性能的影响。方法通过丙三醇-水二元溶剂热法用抗坏血酸还原Cu2+制备纳米铜颗粒。研究丙三醇/水体积比、抗坏血酸用量、聚乙烯吡咯烷酮(PVP)浓度对纳米铜粒径及分散性的影响,并采用柠檬酸和油酸对其进行表面改性处理。结果研究发现,当丙三醇和水的体积比为3∶2,抗坏血酸浓度为0.004mol/L,PVP浓度为0.006 mol/L时,能够得到粒径均一((80±10) nm)且分散性良好的纳米铜。真空环境下保存的纳米铜只有纯铜晶相,但在空气中保存30d后部分被氧化为氧化铜或氧化亚铜。采用柠檬酸改性纳米铜在室温到243℃范围内能保持良好的热稳定性。结论采用丙三醇-水二元溶剂热法制备出了粒径均一、分散性良好的纳米铜。柠檬酸与油酸改性能够显著提高纳米铜的抗氧化与热稳定性能,其改性后在空气中保存30 d仍不被氧化。The work aims to prepare the monodisperse nano-copper particles in a green way and study the effect of modification on its oxidation resistance based on the shortcomings of nano-copper being easily oxidized in air. Nano-copper particles were prepared by reduction of Cu2+ with ascorbic acid by the glycerol-water binary solvothermal method. The effects of glycerol/water volume ratio, ascorbic acid dosage and polyvinylpyrrolidone(PVP) concentration on the particle size and dispersibility of nano-copper were studied. The surface modification treatment of nano-copper was carried out with citric acid and oleic acid. The study showed that, under the following conditions: glycerol/water volume ratio of 3︰2, ascorbic acid concentration of 0.004 mol/L, and PVP concentration of 0.006 mol/L, nano-copper with uniform particle size((80±10) nm) and good dispersibility could be obtained. The nano-copper preserved in a vacuum environment had only a pure copper crystal phase, but was partially oxidized to copper oxide or cuprous oxide after being stored in air for 30 days. The citric acid modified nano-copper could maintain good thermal stability at 243 ℃. Nano-copper prepared by glycerol-water binary solvothermal method has uniform particle size and good dispersibility. The modification with citric acid and oleic acid can significantly improve the oxidation resistance and thermal stability of nano-copper. After modification, it is not oxidized after being stored in air for 30 days.

关 键 词：纳米铜 粒径可控 抗氧化 

分 类 号：TB383[一般工业技术—材料科学与工程]