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纳米银粒子/有机溶剂的界面作用、分散性及光学性能

INTERFACE INTERACTION, DISPERSITY AND OPTICAL PROPERTIES OF SILVER NANOPARTICLE/ORGANIC SOLVENT SYSTEMS

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【作者】 曾戎容敏智章明秋梁海春曾汉民

【Author】 ZENG Rong; RONG Minzhi; ZHANG Mingqiu; LIANG Haichun; ZENG Hanmin (Key Laboratory of Polymeric Composite & Functional Materials, The Ministry of Education of China, Zhongshan University, Guangzhou 510275

【机构】 中山大学教育部聚合物复合材料及功能材料重点实验室

【摘要】 用微乳液法制备了不同粒径的表面改性的纳米银粒子,并用 ESR、 TEM和紫外/可见吸收光谱研究了改性纳米银粒子/有机溶剂体系的界面作用、分散性和光学性能.结果表明:改性的纳米银粒子有一系列表面顺磁局域态.其 ESR谱参数与粒径的关系不符合 Kawabata理论预测;氯仿与粒子有强烈的相互作用,粒子越小作用越强,且越易分散;氯仿作为粒子的良分散剂和高分子的良溶剂,可用于溶液共混工艺制备纳米银/高聚物复合材料.

【Abstract】 Surface--modified silvers nanoparticles with different size were prepared by microemulsion, the interface interaction, dispersity and optical properties of silver nanoparticles/organic solvent systems were investigated by ESR, TEM and UV/VIS spectroscopy. Results showed that there is a series of surface local paramagnetic sites in surface-modified silver nanoparticles, which made the relation between ESR’s parameters and particle size deviate from Kawabata’s, description. There is a Strong interaction between silver nanoparticles and chloroform, the smaller the particle was, the stronger the interaction was. The dispersity of nanoparticles was influenced by particle size and the time of ultrasonic process. It has been found that chloroform, as an excellent solvent for silver nanoparticles and many polymers. could be used to prepare polymeric nanocomposites by means of solution mixing, so it’s easy to adjust the aggregated structure of nanoparticles and their optical properties.

【基金】 教育部科学技术重点资助项目!98069,99198;教育部优秀青年教师基金资助项目
  • 【文献出处】 材料研究学报 ,CHINESE JOURNAL OF MATERIAL RESEARCH , 编辑部邮箱 ,2000年05期
  • 【分类号】TB383
  • 【被引频次】29
  • 【下载频次】669
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