| 微乳液聚合制备纳米银/聚苯乙烯复合材料 |
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| 引用本文： | 刘才林,李俊江,任先艳,杨海君,李福阳,雍辉.微乳液聚合制备纳米银/聚苯乙烯复合材料[J].强激光与粒子束,2012,24(2):349-352. |
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| 作者姓名： | 刘才林 李俊江 任先艳 杨海君 李福阳 雍辉 |
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| 作者单位： | 1.西南科技大学 四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地, 四川 绵阳 621 01 0 |
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| 基金项目： | 西南科技大学引进人才项目（06ZX7105） |
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| 摘 要： | 采用柠檬酸钠为稳定剂、聚乙烯吡咯烷酮为分散剂，以水合肼还原银氨络离子制备出稳定的单分散胶态纳米银。以制得的纳米银溶胶，通过正相微乳液聚合，制备纳米银/聚苯乙烯复合材料。利用紫外-可见光(UV-Vis)吸收光谱研究了纳米银的光吸收特性，采用X射线衍射(XRD)和透射电镜(TEM)对产物的晶体结构、形貌及尺寸进行了分析。结果表明:所制得的银纳米颗粒属立方晶系，平均粒径约10 nm，且无团聚及氧化现象；聚合过程中，纳米银的晶体结构、形貌及尺寸未发生明显变化。凝胶渗透色谱(GPC)分析表明聚苯乙烯基体重均分子量达4.03106，分子量分布指数为1.21；热重-示差扫描量热(TG-DSC)分析表明所制备的复合材料具有优异的热稳定性。
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| 关 键 词： | 微乳液聚合 纳米银 聚苯乙烯 复合材料 |
| 收稿时间： | 2011/6/20 |
Preparation of nano-silver/polystyrene composite via microemulsion polymerization |
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| Liu Cailin
,
Li Junjiang
,
Ren Xianyan
,
Yang Haijun
,
Li Fuyang
,
Yong Hui.Preparation of nano-silver/polystyrene composite via microemulsion polymerization[J].High Power Laser and Particle Beams,2012,24(2):349-352. |
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| Authors: | Liu Cailin Li Junjiang Ren Xianyan Yang Haijun Li Fuyang Yong Hui |
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| Affiliation: | 1.State Key Laboratory Cultivation Base for Nonmetal Composite and Functional Materials,Southwest University of Science and Technology,Mianyang 621010,China |
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| Abstract: | High-stable and monodisperse colloidal nano-silver particles were synthesized by reduction of ［Ag(NH3)2］+ with hydrazine hydrate using sodium citrate as stabilizer and polyvinylpyrrolidone(PVP) as dispersant. Furthermore, nano-silver/polystyrene composite was prepared via microemulsion polymerization.The optical properties of the nano-silver particles were studied by ultraviolet-visible (UV-Vis) absorption spectra, and the crystal structure and microscopic morphology were characterized via X-ray diffraction(XRD) and transmission electron microscopy(TEM), respectively. Results show that, the nano-silver particles belong to cubic crystal system and have an average diameter of 10 nm without aggregation and oxidation, and their crystal structure and microscopic morphology do not change obviously during the process of polymerization. Gel permeation chromatography(GPC) data shows that the weight-average molecular weight of polystyrene matrix is over 4.03×106, and the molecular weight distribution index is 1.21. Thermal gravity-differential scanning calorimetry(TG-DSC) test demonstrates that the nano-silver/polystyrene composite has excellent thermal stability. |
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| Keywords: | microemulsion polymerization nano-silver polystyrene composite |
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