FIB processing for natural rubber with nanomatrix structure
FIB processing for natural rubber with nanomatrix structure
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纳米基质结构天然橡胶的 FIB 加工
DOI：
10.1016/j.polymer.2014.11.020
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发表时间：
2015
期刊：
影响因子：
4.6
通讯作者：
S. Kawahara
中科院分区：
文献类型：
--
作者：
L. Fukuhara;K. Kosugi;Y. Yamamoto;H. Jinnai;H. Nishioka;H. Ishii;S. Kawahara
摘要采用聚焦离子束（FIB）技术制备了脱蛋白天然橡胶与聚苯乙烯接枝共聚物（DPNR-graft-PS）的超薄切片，并通过透射电子显微断层扫描（TEMT）观察得到了纳米基体结构的三维（3D）图像。将DPNR-接枝物-PS在OsO 4溶液中浸泡7天以上，以提高FIB处理过程中TEMT图像的对比度，并在FIB处理过程中进行了场发射扫描电子显微镜的原位观察。并将FIB法制备的超薄切片与冷冻切片机制备的超薄切片进行TEMT观察比较。一个明显清晰的TEMT图像的纳米基体结构，包括天然橡胶微粒和PS纳米颗粒/天然橡胶的纳米基体，获得与超薄切片制备的FIB处理，但没有与制备的冷冻切片机。FIB处理被证明是必不可少的TEMT观察的纳米结构的软材料。
AbstractsFocused ion beam (FIB) processing was performed to prepare an ultra-thin section of graft-copolymer of deproteinized natural rubber and polystyrene (DPNR-graft-PS), in order to obtain a three-dimensional (3D) image of the nanomatrix structure through transmission electron micro-tomography (TEMT) observation. The DPNR-graft-PS was immersed into OsO4solution for more than 7 days for the sake of enhancing a contrast of the TEMT image during the FIB processing.In-situobservation with a field emission-scanning electron microscope was made during the FIB processing. The ultra-thin section prepared by FIB processing was compared with that prepared with a cryo-microtome in the TEMT observation. A distinctly clear TEMT image of the nanomatrix structure, comprising the natural rubber micro-particles and the nanomatrix of PS nano-particles/natural rubber, was obtained with the ultra-thin section prepared by FIB processing, but not with that prepared with the cryo-microtome. The FIB processing was proved to be indispensable for the TEMT observation of the nano-structure of the soft-materials.