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求一段话的翻译
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The thermal properties of the surfactants and nanoshells were investigated.6 As characterized by TGA, EPE-Fe surfactants started to decompose at ca. 150 °C, while the decomposition temperature for PB shells produced from EPE-Fe using MEPP was 360 °C.6 Two possible reasons may account for this shell-enhanced thermal stability: (1) the thin layer of PB hollow shells may inhibit heat flow among the particles and therefore may act as insulators; (2) the shell of the PB network prevented the mass loss of EPE polymers. This thermal behavior may be useful for the production of thermal isolation materials or shape-retained nanoceramics.9 In summary, we have developed a conceptually new method, MEPP, for the synthesis of PB nanoshells with variable size. Thesynthesis involves miniemulsion preparation using organometallic surfactants and coordination polymerization at the periphery of the colloids. The nanoshells were characterized and confirmed by using FT-IR, UV-vis, WAXD, TEM, SEM, and AFM. TGA analysis indicated that the shell structure enhanced the thermal stability of the coordination polymers. Magnetic properties of the shells will be characterized in our further research. The hollow and rigid shells, unlike solid PB NPs,2,3 provide possibilities to encapsulate guest materials for various applications such as sensors, biomedicines, enzyme, or catalyst immobilization.10 |
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jakejzy(金币+70): 1-25 17:00
jakejzy(金币+70): 1-25 17:00
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对表面活性剂和纳米壳的热性能进行了研究。 6使用热分析进行表征，EPE-Fe表面活性剂在约150°C时开始分解，而使用MEPP方法由EPE-Fe生产出的PB壳的分解温度是360°C。 这种壳的热稳定性增强或许可以归结为两个可能的原因： （1）在PB的空壳薄层可能抑制热粒子之间的流动，因此，它可以用作绝缘体 （2）PB网壳阻止了EPE聚合物的质量损失。这种热行为可用于生产热绝缘材料或定型的纳米陶瓷 总的来说，我们发展出了一种概念上的新方法，MEPP，它能够用于可变大小的纳米壳的合成。这种涉及细乳液制备的合成方法使用有机金属表面活性剂和胶体周围的配位聚合。我们对纳米壳进行了表征，并利用红外光谱、紫外光谱、广角X射线衍射、透射电镜、扫描电镜和原子力显微镜对其进行了证实。热分析表明，壳结构提高了配位聚合物的热稳定性。壳的磁性特点将是我们下一步研究的目标。与固态的PB不同，中空而外壁坚固的壳使封装各种客体材料的应用成为可能，例如应用于传感器，生物医药，酶，或催化剂固定化。 不知道翻译的是否合体  [ Last edited by laixin631 on 2010-1-25 at 12:19 ] |
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