Aerosol Process for the In Situ Coating of Nanoparticles with a Polymer Shell

Aerosol Process for the In Situ Coating of Nanoparticles with a Polymer Shell
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用聚合物壳原位涂覆纳米颗粒的气溶胶工艺

DOI:
10.1080/02786826.2014.964354
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发表时间:
2014
影响因子:
5.2
通讯作者:
A. P. Weber
A. P. Weber
中科院分区:
环境科学与生态学4区
文献类型:
--
作者:
J. Poostforooshan;S. Rennecke;M. Gensch;S. Beuermann;G.-P. Brunotte;G. Ziegmann;A. P. Weber

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本文提出了一种用聚合物外壳封装气载纳米粒子的新方法。这种方法意味着单体蒸汽在纳米粒子表面周围以核形式发生非均相冷凝,随后通过添加nh3作为气溶胶引发剂开始聚合。采用火花放电和雾化法制备Ag和sio2纳米颗粒作为无机核心,以甲基丙烯酸丙酯(GMA)为有机单体。研究了单体的蒸汽压、无机芯的形貌、材料、粒径和制备方法等参数对聚合物壳层厚度和纳米复合材料形貌的影响。通过扫描迁移率粒度仪(SMPS)和透射电子显微镜(TEM)研究了核壳纳米颗粒的粒径分布和形貌。最后,采用气溶胶光发射法(APE)测定了涂层效率,结果表明,单体和聚合物的涂层效率分别为99%和60%。美国气溶胶研究协会版权所有
This article presents a novel method to encapsulate gas-borne nanoparticles with a polymeric shell. This method implies heterogeneous condensation of monomer vapor around the surface of nanoparticles as nuclei and polymerization is then subsequently started by addition of NH3as aerosol initiator. Ag and SiO2nanoparticles were generated as inorganic core by spark discharge and nebulization, respectively, and glycidyl methacrylate (GMA) was used as organic monomer. The effect of several parameters, including vapor pressure of monomer and properties of inorganic core such as morphology, material, particle size, and production method on the thickness of polymeric shell and morphology of resulting nanocomposites has been investigated. The particle size distribution and morphology of the resulting core-shell nanoparticles have been studied via scanning mobility particle sizer (SMPS) and transmission electron microscope (TEM). Finally, the coating efficiency was determined by aerosol photoemission (APE) and the results show that monomer and polymer coating efficiency are 99% and 60%, respectively.Copyright 2014 American Association for Aerosol Research
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