Thin-film particles of graphite oxide 1: High-yield synthesis and flexibility of the particles
Thin-film particles of graphite oxide 1: High-yield synthesis and flexibility of the particles
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DOI：
10.1016/j.carbon.2004.07.003
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发表时间：
2004-01-01
期刊：
影响因子：
10.9
通讯作者：
Ohba, M
中科院分区：
文献类型：
--
作者：
Hirata, M;Gotou, T;Ohba, M
通过改进的Hummers方法以高产率合成了氧化石墨薄膜颗粒，其中将非常长的氧化期与高纯度纯化过程相结合。所获得的颗粒具有几纳米的平均厚度和约20 μ m的平均宽度。产率为122重量%，基于原料石墨，碳的回收率为68%。而且。对于原始颗粒本身、对于基体聚合物中的颗粒以及对于两种次级构象（层压层聚集体和无规形状聚集体），观察到颗粒的优异柔韧性。如通常预期和已经部分观察到的，如果颗粒和分散介质之间的亲和力非常高，则薄膜颗粒延伸良好，尽管可能产生局部折痕或大的弯曲。在中等亲和力下，颗粒轻微弯曲，并且在非常低的亲和力下，颗粒随机聚集。(C)2004 Elsevier Ltd.保留所有权利。
Thin-film particles of graphite oxide were synthesized in high yield by the modified Hummers' method, in which a very long oxidation period was combined with a high purity purification process. The particles obtained had an average thickness of several nanometers and an average width of about 20 mum. The yield was 122 wt% based on the raw graphite and the recovery of carbon was 68%. Moreover. excellent flexibility of the particles was observed for the original particle(s) itself, for the particle in matrix polymer, and for two kinds of secondary conformations (lamination-layer-aggregate and random-shape-aggregate). As generally expected and already observed partially, if the affinity between the particle and the dispersion medium was very high, the thin-film particle extended well, though a local crease or a large bend could be generated. At a medium degree of affinity, the particle slightly bent, and at very low affinity, the particle(s) randomly aggregated. (C) 2004 Elsevier Ltd. All rights reserved.