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Preparation of inexpensive new carbon nanofibers with high crystallinity, and their characterization

廉价新型高结晶碳纳米纤维的制备及其表征

基本信息

批准号：
23560806
负责人：
KABURAGI Yutaka
金额：
$ 3.41万
依托单位：
Tokyo City University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2011
资助国家：
日本
起止时间：
2011 至 2013
项目状态：
已结题

项目摘要

Only skin regions with about 100 nm thick of bulk cellulose are graphitized by a simple heat treatment at high temperatures (skin effect) though they are precursors of nongraphitizing carbon. In the case of cellulose nanofibers (Cel-NFs) with about 100 nm thick or less, highly crystallized carbon nanofibers (Car-NFs) should be prepared by the high temperature heat treatment because the skin effect is expected to reach the center of each Car-NF. The Cel-NF aggregates were obtained from nanocellulose such as bacteria cellulose through careful dispersion in solutions and extraction, and Car-NFs were prepared from the aggregates by carbonization and heat treatments at high temperature. The crystallized Car-NFs were obtained from the highly dispersed Cel-NFs with about 50 nm thick by the high temperature heat treatments. The highly crystallized Car-NFs prepared from Cel-NFs will be applied to many fields because of inexpensive and environment friendly.

尽管它们是非石墨化碳的前体，但仅具有约 100 nm 厚的散装纤维素的表层区域通过简单的高温热处理（趋肤效应）即可石墨化。在厚度约为100 nm或更小的纤维素纳米纤维（Cel-NF）的情况下，应通过高温热处理来制备高度结晶的碳纳米纤维（Car-NF），因为趋肤效应预计会到达每个Car-NF的中心。 Cel-NF聚集体是从细菌纤维素等纳米纤维素中通过仔细分散在溶液中并提取而获得的，Car-NFs是通过碳化和高温热处理从聚集体中制备的。通过高温热处理，从厚度约50 nm的高度分散的Cel-NFs中获得结晶化的Car-NFs。由Cel-NFs制备的高度结晶的Car-NFs由于价格低廉且环境友好，将应用于许多领域。