| 单分散PS/SiO_2纳米复合微球的制备与表征 |
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| 引用本文： | 邹华,吴石山,沈健.单分散PS/SiO_2纳米复合微球的制备与表征[J].高分子学报,2009,0(3):268-272. |
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| 作者姓名： | 邹华 吴石山 沈健 |
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| 作者单位： | 南京大学化学化工学院,南京,210093 |
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| 摘 要： | 采用一种简单和低成本的方法制备单分散SiO2包覆聚苯乙烯(PS)(PS/SiO2)核-壳型纳米复合微球.首先在聚乙烯吡咯烷酮(PVP)存在下制备了PS纳米微球,然后在NH4OH/乙醇溶液中通过溶胶-凝胶过程在PS微球表面包覆SiO2.PS纳米微球的制备在水介质中进行,无需使用共单体,使用的是常用的过硫酸钾自由基引发剂;包覆处理前不用进行溶剂交换或离心处理.研究了PVP,NH4OH和原硅酸乙酯(TEOS)的用量对PS/SiO2纳米复合微球尺寸和形态的影响.随着PVP用量增加,PS微球变小,因此得到较小的PS/SiO2纳米复合微球;NH4OH用量对SiO2包覆层的厚度没有影响,但对SiO2包覆层的表面形态有影响,随着NH4OH用量增加包覆层表面变得粗糙;随着TEOS溶液用量增加,生成的SiO2增加,其包覆层的厚度增加.
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| 关 键 词： | PS/SiO2纳米复合微球 聚乙烯吡咯烷酮 核-壳微球 |
| 收稿时间： | 2008-07-01 |
PREPARATION AND CHARACTERIZATION OF PS/SiO2 NANOCOMPOSITE MICROSPHERES |
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| ZOU Hua,WU Shishan,SHEN Jian.PREPARATION AND CHARACTERIZATION OF PS/SiO2 NANOCOMPOSITE MICROSPHERES[J].Acta Polymerica Sinica,2009,0(3):268-272. |
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| Authors: | ZOU Hua WU Shishan SHEN Jian |
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| Affiliation: | School of Chemistry and Chemical Engineering;Nanjing University;Nanjing 210093 |
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| Abstract: | The monodisperse SiO_2-coated polystyrene(PS)(PS/SiO_2) core-shell nanocomposite microspheres were prepared by a simple and low-cost method.The PS nanospheres were first synthesized in the presence of polyvinylpyrrolidone(PVP),and the SiO_2 particles were subsequently coated on the surface of the PS nanospheres by sol-gel process in NH_4OH/ethanol solutions.The preparation of the PS nanospheres is accomplished in aqueous media and has following advantages:no comonomer is needed,the cheap potassium persulfat... |
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| Keywords: | PS/SiO_2 nanocomposite microspheres Polyvinylpyrrolidone Core-shell spheres |
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